hyperv.c File Reference

#include "x86.h"
#include "lapic.h"
#include "ioapic.h"
#include "cpuid.h"
#include "hyperv.h"
#include "mmu.h"
#include "xen.h"
#include <linux/cpu.h>
#include <linux/kvm_host.h>
#include <linux/highmem.h>
#include <linux/sched/cputime.h>
#include <linux/spinlock.h>
#include <linux/eventfd.h>
#include <asm/apicdef.h>
#include <asm/mshyperv.h>
#include <trace/events/kvm.h>
#include "trace.h"
#include "irq.h"
#include "fpu.h"

Include dependency graph for hyperv.c:

Go to the source code of this file.

Classes
struct	kvm_hv_hcall

Macros
#define	pr_fmt(fmt)   KBUILD_MODNAME ": " fmt
#define	KVM_HV_MAX_SPARSE_VCPU_SET_BITS   DIV_ROUND_UP(KVM_MAX_VCPUS, HV_VCPUS_PER_SPARSE_BANK)
#define	HV_EXT_CALL_MAX   (HV_EXT_CALL_QUERY_CAPABILITIES + 64)
#define	KVM_HV_WIN2016_GUEST_ID   0x1040a00003839
#define	KVM_HV_WIN2016_GUEST_ID_MASK   (~GENMASK_ULL(23, 16)) /* mask out the service version */

Functions
static void	stimer_mark_pending (struct kvm_vcpu_hv_stimer *stimer, bool vcpu_kick)
static u64	synic_read_sint (struct kvm_vcpu_hv_synic *synic, int sint)
static int	synic_get_sint_vector (u64 sint_value)
static bool	synic_has_vector_connected (struct kvm_vcpu_hv_synic *synic, int vector)
static bool	synic_has_vector_auto_eoi (struct kvm_vcpu_hv_synic *synic, int vector)
static void	synic_update_vector (struct kvm_vcpu_hv_synic *synic, int vector)
static int	synic_set_sint (struct kvm_vcpu_hv_synic *synic, int sint, u64 data, bool host)
static struct kvm_vcpu *	get_vcpu_by_vpidx (struct kvm *kvm, u32 vpidx)
static struct kvm_vcpu_hv_synic *	synic_get (struct kvm *kvm, u32 vpidx)
static void	kvm_hv_notify_acked_sint (struct kvm_vcpu *vcpu, u32 sint)
static void	synic_exit (struct kvm_vcpu_hv_synic *synic, u32 msr)
static int	synic_set_msr (struct kvm_vcpu_hv_synic *synic, u32 msr, u64 data, bool host)
static bool	kvm_hv_is_syndbg_enabled (struct kvm_vcpu *vcpu)
static int	kvm_hv_syndbg_complete_userspace (struct kvm_vcpu *vcpu)
static void	syndbg_exit (struct kvm_vcpu *vcpu, u32 msr)
static int	syndbg_set_msr (struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
static int	syndbg_get_msr (struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
static int	synic_get_msr (struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata, bool host)
static int	synic_set_irq (struct kvm_vcpu_hv_synic *synic, u32 sint)
int	kvm_hv_synic_set_irq (struct kvm *kvm, u32 vpidx, u32 sint)
void	kvm_hv_synic_send_eoi (struct kvm_vcpu *vcpu, int vector)
static int	kvm_hv_set_sint_gsi (struct kvm *kvm, u32 vpidx, u32 sint, int gsi)
void	kvm_hv_irq_routing_update (struct kvm *kvm)
static void	synic_init (struct kvm_vcpu_hv_synic *synic)
static u64	get_time_ref_counter (struct kvm *kvm)
static void	stimer_cleanup (struct kvm_vcpu_hv_stimer *stimer)
static enum hrtimer_restart	stimer_timer_callback (struct hrtimer *timer)
static int	stimer_start (struct kvm_vcpu_hv_stimer *stimer)
static int	stimer_set_config (struct kvm_vcpu_hv_stimer *stimer, u64 config, bool host)
static int	stimer_set_count (struct kvm_vcpu_hv_stimer *stimer, u64 count, bool host)
static int	stimer_get_config (struct kvm_vcpu_hv_stimer *stimer, u64 *pconfig)
static int	stimer_get_count (struct kvm_vcpu_hv_stimer *stimer, u64 *pcount)
static int	synic_deliver_msg (struct kvm_vcpu_hv_synic *synic, u32 sint, struct hv_message *src_msg, bool no_retry)
static int	stimer_send_msg (struct kvm_vcpu_hv_stimer *stimer)
static int	stimer_notify_direct (struct kvm_vcpu_hv_stimer *stimer)
static void	stimer_expiration (struct kvm_vcpu_hv_stimer *stimer)
void	kvm_hv_process_stimers (struct kvm_vcpu *vcpu)
void	kvm_hv_vcpu_uninit (struct kvm_vcpu *vcpu)
bool	kvm_hv_assist_page_enabled (struct kvm_vcpu *vcpu)
	EXPORT_SYMBOL_GPL (kvm_hv_assist_page_enabled)
int	kvm_hv_get_assist_page (struct kvm_vcpu *vcpu)
	EXPORT_SYMBOL_GPL (kvm_hv_get_assist_page)
static void	stimer_prepare_msg (struct kvm_vcpu_hv_stimer *stimer)
static void	stimer_init (struct kvm_vcpu_hv_stimer *stimer, int timer_index)
int	kvm_hv_vcpu_init (struct kvm_vcpu *vcpu)
int	kvm_hv_activate_synic (struct kvm_vcpu *vcpu, bool dont_zero_synic_pages)
static bool	kvm_hv_msr_partition_wide (u32 msr)
static int	kvm_hv_msr_get_crash_data (struct kvm *kvm, u32 index, u64 *pdata)
static int	kvm_hv_msr_get_crash_ctl (struct kvm *kvm, u64 *pdata)
static int	kvm_hv_msr_set_crash_ctl (struct kvm *kvm, u64 data)
static int	kvm_hv_msr_set_crash_data (struct kvm *kvm, u32 index, u64 data)
static bool	compute_tsc_page_parameters (struct pvclock_vcpu_time_info *hv_clock, struct ms_hyperv_tsc_page *tsc_ref)
static bool	tsc_page_update_unsafe (struct kvm_hv *hv)
void	kvm_hv_setup_tsc_page (struct kvm *kvm, struct pvclock_vcpu_time_info *hv_clock)
void	kvm_hv_request_tsc_page_update (struct kvm *kvm)
static bool	hv_check_msr_access (struct kvm_vcpu_hv *hv_vcpu, u32 msr)
static void	__kvm_hv_xsaves_xsavec_maybe_warn (struct kvm_vcpu *vcpu)
void	kvm_hv_xsaves_xsavec_maybe_warn (struct kvm_vcpu *vcpu)
static int	kvm_hv_set_msr_pw (struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
static u64	current_task_runtime_100ns (void)
static int	kvm_hv_set_msr (struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
static int	kvm_hv_get_msr_pw (struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
static int	kvm_hv_get_msr (struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
int	kvm_hv_set_msr_common (struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
int	kvm_hv_get_msr_common (struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
static void	sparse_set_to_vcpu_mask (struct kvm *kvm, u64 *sparse_banks, u64 valid_bank_mask, unsigned long *vcpu_mask)
static bool	hv_is_vp_in_sparse_set (u32 vp_id, u64 valid_bank_mask, u64 sparse_banks[])
static int	kvm_hv_get_hc_data (struct kvm *kvm, struct kvm_hv_hcall *hc, u16 orig_cnt, u16 cnt_cap, u64 *data)
static u64	kvm_get_sparse_vp_set (struct kvm *kvm, struct kvm_hv_hcall *hc, u64 *sparse_banks)
static int	kvm_hv_get_tlb_flush_entries (struct kvm *kvm, struct kvm_hv_hcall *hc, u64 entries[])
static void	hv_tlb_flush_enqueue (struct kvm_vcpu *vcpu, struct kvm_vcpu_hv_tlb_flush_fifo *tlb_flush_fifo, u64 *entries, int count)
int	kvm_hv_vcpu_flush_tlb (struct kvm_vcpu *vcpu)
static u64	kvm_hv_flush_tlb (struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
static void	kvm_hv_send_ipi_to_many (struct kvm *kvm, u32 vector, u64 *sparse_banks, u64 valid_bank_mask)
static u64	kvm_hv_send_ipi (struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
void	kvm_hv_set_cpuid (struct kvm_vcpu *vcpu, bool hyperv_enabled)
int	kvm_hv_set_enforce_cpuid (struct kvm_vcpu *vcpu, bool enforce)
static void	kvm_hv_hypercall_set_result (struct kvm_vcpu *vcpu, u64 result)
static int	kvm_hv_hypercall_complete (struct kvm_vcpu *vcpu, u64 result)
static int	kvm_hv_hypercall_complete_userspace (struct kvm_vcpu *vcpu)
static u16	kvm_hvcall_signal_event (struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
static bool	is_xmm_fast_hypercall (struct kvm_hv_hcall *hc)
static void	kvm_hv_hypercall_read_xmm (struct kvm_hv_hcall *hc)
static bool	hv_check_hypercall_access (struct kvm_vcpu_hv *hv_vcpu, u16 code)
int	kvm_hv_hypercall (struct kvm_vcpu *vcpu)
void	kvm_hv_init_vm (struct kvm *kvm)
void	kvm_hv_destroy_vm (struct kvm *kvm)
static int	kvm_hv_eventfd_assign (struct kvm *kvm, u32 conn_id, int fd)
static int	kvm_hv_eventfd_deassign (struct kvm *kvm, u32 conn_id)
int	kvm_vm_ioctl_hv_eventfd (struct kvm *kvm, struct kvm_hyperv_eventfd *args)
int	kvm_get_hv_cpuid (struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, struct kvm_cpuid_entry2 __user *entries)

Macro Definition Documentation

HV_EXT_CALL_MAX

#define HV_EXT_CALL_MAX   (HV_EXT_CALL_QUERY_CAPABILITIES + 64)

Definition at line 63 of file hyperv.c.

KVM_HV_MAX_SPARSE_VCPU_SET_BITS

#define KVM_HV_MAX_SPARSE_VCPU_SET_BITS   DIV_ROUND_UP(KVM_MAX_VCPUS, HV_VCPUS_PER_SPARSE_BANK)

Definition at line 45 of file hyperv.c.

KVM_HV_WIN2016_GUEST_ID

#define KVM_HV_WIN2016_GUEST_ID   0x1040a00003839

Definition at line 1325 of file hyperv.c.

KVM_HV_WIN2016_GUEST_ID_MASK

#define KVM_HV_WIN2016_GUEST_ID_MASK   (~GENMASK_ULL(23, 16)) /* mask out the service version */

Definition at line 1326 of file hyperv.c.

pr_fmt

#define pr_fmt

(

fmt

)

KBUILD_MODNAME ": " fmt

Definition at line 20 of file hyperv.c.

Function Documentation

__kvm_hv_xsaves_xsavec_maybe_warn()

static void __kvm_hv_xsaves_xsavec_maybe_warn ( struct kvm_vcpu *  vcpu )

static

Definition at line 1335 of file hyperv.c.

{
    struct kvm *kvm = vcpu->kvm;
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    /* Check again under the hv_lock.  */
    if (hv->xsaves_xsavec_checked)
        return;
 
    if ((hv->hv_guest_os_id & KVM_HV_WIN2016_GUEST_ID_MASK) !=
        KVM_HV_WIN2016_GUEST_ID)
        return;
 
    hv->xsaves_xsavec_checked = true;
 
    /* UP configurations aren't affected */
    if (atomic_read(&kvm->online_vcpus) < 2)
        return;
 
    if (guest_cpuid_has(vcpu, X86_FEATURE_XSAVES) ||
        !guest_cpuid_has(vcpu, X86_FEATURE_XSAVEC))
        return;
 
    pr_notice_ratelimited("Booting SMP Windows KVM VM with !XSAVES && XSAVEC. "
                  "If it fails to boot try disabling XSAVEC in the VM config.\n");
}

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compute_tsc_page_parameters()

static bool compute_tsc_page_parameters ( struct pvclock_vcpu_time_info *  hv_clock, struct ms_hyperv_tsc_page *  tsc_ref  )

static

Definition at line 1109 of file hyperv.c.

{
    u64 max_mul;
 
    if (!(hv_clock->flags & PVCLOCK_TSC_STABLE_BIT))
        return false;
 
    /*
     * check if scale would overflow, if so we use the time ref counter
     *    tsc_to_system_mul * 2^(tsc_shift+32) / 100 >= 2^64
     *    tsc_to_system_mul / 100 >= 2^(32-tsc_shift)
     *    tsc_to_system_mul >= 100 * 2^(32-tsc_shift)
     */
    max_mul = 100ull << (32 - hv_clock->tsc_shift);
    if (hv_clock->tsc_to_system_mul >= max_mul)
        return false;
 
    /*
     * Otherwise compute the scale and offset according to the formulas
     * derived above.
     */
    tsc_ref->tsc_scale =
        mul_u64_u32_div(1ULL << (32 + hv_clock->tsc_shift),
                hv_clock->tsc_to_system_mul,
                100);
 
    tsc_ref->tsc_offset = hv_clock->system_time;
    do_div(tsc_ref->tsc_offset, 100);
    tsc_ref->tsc_offset -=
        mul_u64_u64_shr(hv_clock->tsc_timestamp, tsc_ref->tsc_scale, 64);
    return true;
}

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current_task_runtime_100ns()

static u64 current_task_runtime_100ns ( void  )

static

Definition at line 1509 of file hyperv.c.

{
    u64 utime, stime;
 
    task_cputime_adjusted(current, &utime, &stime);
 
    return div_u64(utime + stime, 100);
}

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EXPORT_SYMBOL_GPL() [1/2]

EXPORT_SYMBOL_GPL

(

kvm_hv_assist_page_enabled

)

EXPORT_SYMBOL_GPL() [2/2]

EXPORT_SYMBOL_GPL

(

kvm_hv_get_assist_page

)

get_time_ref_counter()

static u64 get_time_ref_counter ( struct kvm *  kvm )

static

Definition at line 568 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    struct kvm_vcpu *vcpu;
    u64 tsc;
 
    /*
     * Fall back to get_kvmclock_ns() when TSC page hasn't been set up,
     * is broken, disabled or being updated.
     */
    if (hv->hv_tsc_page_status != HV_TSC_PAGE_SET)
        return div_u64(get_kvmclock_ns(kvm), 100);
 
    vcpu = kvm_get_vcpu(kvm, 0);
    tsc = kvm_read_l1_tsc(vcpu, rdtsc());
    return mul_u64_u64_shr(tsc, hv->tsc_ref.tsc_scale, 64)
        + hv->tsc_ref.tsc_offset;
}

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get_vcpu_by_vpidx()

static struct kvm_vcpu* get_vcpu_by_vpidx ( struct kvm *  kvm, u32  vpidx  )

static

Definition at line 190 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = NULL;
    unsigned long i;
 
    if (vpidx >= KVM_MAX_VCPUS)
        return NULL;
 
    vcpu = kvm_get_vcpu(kvm, vpidx);
    if (vcpu && kvm_hv_get_vpindex(vcpu) == vpidx)
        return vcpu;
    kvm_for_each_vcpu(i, vcpu, kvm)
        if (kvm_hv_get_vpindex(vcpu) == vpidx)
            return vcpu;
    return NULL;
}

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hv_check_hypercall_access()

static bool hv_check_hypercall_access ( struct kvm_vcpu_hv *  hv_vcpu, u16  code  )

static

Definition at line 2469 of file hyperv.c.

{
    if (!hv_vcpu->enforce_cpuid)
        return true;
 
    switch (code) {
    case HVCALL_NOTIFY_LONG_SPIN_WAIT:
        return hv_vcpu->cpuid_cache.enlightenments_ebx &&
            hv_vcpu->cpuid_cache.enlightenments_ebx != U32_MAX;
    case HVCALL_POST_MESSAGE:
        return hv_vcpu->cpuid_cache.features_ebx & HV_POST_MESSAGES;
    case HVCALL_SIGNAL_EVENT:
        return hv_vcpu->cpuid_cache.features_ebx & HV_SIGNAL_EVENTS;
    case HVCALL_POST_DEBUG_DATA:
    case HVCALL_RETRIEVE_DEBUG_DATA:
    case HVCALL_RESET_DEBUG_SESSION:
        /*
         * Return 'true' when SynDBG is disabled so the resulting code
         * will be HV_STATUS_INVALID_HYPERCALL_CODE.
         */
        return !kvm_hv_is_syndbg_enabled(hv_vcpu->vcpu) ||
            hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
        if (!(hv_vcpu->cpuid_cache.enlightenments_eax &
              HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
            return false;
        fallthrough;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
        return hv_vcpu->cpuid_cache.enlightenments_eax &
            HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
    case HVCALL_SEND_IPI_EX:
        if (!(hv_vcpu->cpuid_cache.enlightenments_eax &
              HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
            return false;
        fallthrough;
    case HVCALL_SEND_IPI:
        return hv_vcpu->cpuid_cache.enlightenments_eax &
            HV_X64_CLUSTER_IPI_RECOMMENDED;
    case HV_EXT_CALL_QUERY_CAPABILITIES ... HV_EXT_CALL_MAX:
        return hv_vcpu->cpuid_cache.features_ebx &
            HV_ENABLE_EXTENDED_HYPERCALLS;
    default:
        break;
    }
 
    return true;
}

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hv_check_msr_access()

static bool hv_check_msr_access ( struct kvm_vcpu_hv *  hv_vcpu, u32  msr  )

static

Definition at line 1249 of file hyperv.c.

{
    if (!hv_vcpu->enforce_cpuid)
        return true;
 
    switch (msr) {
    case HV_X64_MSR_GUEST_OS_ID:
    case HV_X64_MSR_HYPERCALL:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_HYPERCALL_AVAILABLE;
    case HV_X64_MSR_VP_RUNTIME:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_VP_RUNTIME_AVAILABLE;
    case HV_X64_MSR_TIME_REF_COUNT:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_TIME_REF_COUNT_AVAILABLE;
    case HV_X64_MSR_VP_INDEX:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_VP_INDEX_AVAILABLE;
    case HV_X64_MSR_RESET:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_RESET_AVAILABLE;
    case HV_X64_MSR_REFERENCE_TSC:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_REFERENCE_TSC_AVAILABLE;
    case HV_X64_MSR_SCONTROL:
    case HV_X64_MSR_SVERSION:
    case HV_X64_MSR_SIEFP:
    case HV_X64_MSR_SIMP:
    case HV_X64_MSR_EOM:
    case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_SYNIC_AVAILABLE;
    case HV_X64_MSR_STIMER0_CONFIG:
    case HV_X64_MSR_STIMER1_CONFIG:
    case HV_X64_MSR_STIMER2_CONFIG:
    case HV_X64_MSR_STIMER3_CONFIG:
    case HV_X64_MSR_STIMER0_COUNT:
    case HV_X64_MSR_STIMER1_COUNT:
    case HV_X64_MSR_STIMER2_COUNT:
    case HV_X64_MSR_STIMER3_COUNT:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_SYNTIMER_AVAILABLE;
    case HV_X64_MSR_EOI:
    case HV_X64_MSR_ICR:
    case HV_X64_MSR_TPR:
    case HV_X64_MSR_VP_ASSIST_PAGE:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_MSR_APIC_ACCESS_AVAILABLE;
    case HV_X64_MSR_TSC_FREQUENCY:
    case HV_X64_MSR_APIC_FREQUENCY:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_ACCESS_FREQUENCY_MSRS;
    case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
    case HV_X64_MSR_TSC_EMULATION_CONTROL:
    case HV_X64_MSR_TSC_EMULATION_STATUS:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_ACCESS_REENLIGHTENMENT;
    case HV_X64_MSR_TSC_INVARIANT_CONTROL:
        return hv_vcpu->cpuid_cache.features_eax &
            HV_ACCESS_TSC_INVARIANT;
    case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
    case HV_X64_MSR_CRASH_CTL:
        return hv_vcpu->cpuid_cache.features_edx &
            HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
    case HV_X64_MSR_SYNDBG_OPTIONS:
    case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        return hv_vcpu->cpuid_cache.features_edx &
            HV_FEATURE_DEBUG_MSRS_AVAILABLE;
    default:
        break;
    }
 
    return false;
}

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hv_is_vp_in_sparse_set()

static bool hv_is_vp_in_sparse_set ( u32  vp_id, u64  valid_bank_mask, u64  sparse_banks[]  )

static

Definition at line 1835 of file hyperv.c.

{
    int valid_bit_nr = vp_id / HV_VCPUS_PER_SPARSE_BANK;
    unsigned long sbank;
 
    if (!test_bit(valid_bit_nr, (unsigned long *)&valid_bank_mask))
        return false;
 
    /*
     * The index into the sparse bank is the number of preceding bits in
     * the valid mask.  Optimize for VMs with <64 vCPUs by skipping the
     * fancy math if there can't possibly be preceding bits.
     */
    if (valid_bit_nr)
        sbank = hweight64(valid_bank_mask & GENMASK_ULL(valid_bit_nr - 1, 0));
    else
        sbank = 0;
 
    return test_bit(vp_id % HV_VCPUS_PER_SPARSE_BANK,
            (unsigned long *)&sparse_banks[sbank]);
}

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hv_tlb_flush_enqueue()

static void hv_tlb_flush_enqueue ( struct kvm_vcpu *  vcpu, struct kvm_vcpu_hv_tlb_flush_fifo *  tlb_flush_fifo, u64 *  entries, int  count  )

static

Definition at line 1931 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    u64 flush_all_entry = KVM_HV_TLB_FLUSHALL_ENTRY;
 
    if (!hv_vcpu)
        return;
 
    spin_lock(&tlb_flush_fifo->write_lock);
 
    /*
     * All entries should fit on the fifo leaving one free for 'flush all'
     * entry in case another request comes in. In case there's not enough
     * space, just put 'flush all' entry there.
     */
    if (count && entries && count < kfifo_avail(&tlb_flush_fifo->entries)) {
        WARN_ON(kfifo_in(&tlb_flush_fifo->entries, entries, count) != count);
        goto out_unlock;
    }
 
    /*
     * Note: full fifo always contains 'flush all' entry, no need to check the
     * return value.
     */
    kfifo_in(&tlb_flush_fifo->entries, &flush_all_entry, 1);
 
out_unlock:
    spin_unlock(&tlb_flush_fifo->write_lock);
}

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is_xmm_fast_hypercall()

static bool is_xmm_fast_hypercall ( struct kvm_hv_hcall *  hc )

static

Definition at line 2445 of file hyperv.c.

{
    switch (hc->code) {
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
    case HVCALL_SEND_IPI_EX:
        return true;
    }
 
    return false;
}

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kvm_get_hv_cpuid()

int kvm_get_hv_cpuid	(	struct kvm_vcpu *	vcpu,
		struct kvm_cpuid2 *	cpuid,
		struct kvm_cpuid_entry2 __user *	entries
	)

Definition at line 2760 of file hyperv.c.

{
    uint16_t evmcs_ver = 0;
    struct kvm_cpuid_entry2 cpuid_entries[] = {
        { .function = HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS },
        { .function = HYPERV_CPUID_INTERFACE },
        { .function = HYPERV_CPUID_VERSION },
        { .function = HYPERV_CPUID_FEATURES },
        { .function = HYPERV_CPUID_ENLIGHTMENT_INFO },
        { .function = HYPERV_CPUID_IMPLEMENT_LIMITS },
        { .function = HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS },
        { .function = HYPERV_CPUID_SYNDBG_INTERFACE },
        { .function = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES },
        { .function = HYPERV_CPUID_NESTED_FEATURES },
    };
    int i, nent = ARRAY_SIZE(cpuid_entries);
 
    if (kvm_x86_ops.nested_ops->get_evmcs_version)
        evmcs_ver = kvm_x86_ops.nested_ops->get_evmcs_version(vcpu);
 
    if (cpuid->nent < nent)
        return -E2BIG;
 
    if (cpuid->nent > nent)
        cpuid->nent = nent;
 
    for (i = 0; i < nent; i++) {
        struct kvm_cpuid_entry2 *ent = &cpuid_entries[i];
        u32 signature[3];
 
        switch (ent->function) {
        case HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS:
            memcpy(signature, "Linux KVM Hv", 12);
 
            ent->eax = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES;
            ent->ebx = signature[0];
            ent->ecx = signature[1];
            ent->edx = signature[2];
            break;
 
        case HYPERV_CPUID_INTERFACE:
            ent->eax = HYPERV_CPUID_SIGNATURE_EAX;
            break;
 
        case HYPERV_CPUID_VERSION:
            /*
             * We implement some Hyper-V 2016 functions so let's use
             * this version.
             */
            ent->eax = 0x00003839;
            ent->ebx = 0x000A0000;
            break;
 
        case HYPERV_CPUID_FEATURES:
            ent->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
            ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
            ent->eax |= HV_MSR_SYNIC_AVAILABLE;
            ent->eax |= HV_MSR_SYNTIMER_AVAILABLE;
            ent->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
            ent->eax |= HV_MSR_HYPERCALL_AVAILABLE;
            ent->eax |= HV_MSR_VP_INDEX_AVAILABLE;
            ent->eax |= HV_MSR_RESET_AVAILABLE;
            ent->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
            ent->eax |= HV_ACCESS_FREQUENCY_MSRS;
            ent->eax |= HV_ACCESS_REENLIGHTENMENT;
            ent->eax |= HV_ACCESS_TSC_INVARIANT;
 
            ent->ebx |= HV_POST_MESSAGES;
            ent->ebx |= HV_SIGNAL_EVENTS;
            ent->ebx |= HV_ENABLE_EXTENDED_HYPERCALLS;
 
            ent->edx |= HV_X64_HYPERCALL_XMM_INPUT_AVAILABLE;
            ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
            ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
 
            ent->ebx |= HV_DEBUGGING;
            ent->edx |= HV_X64_GUEST_DEBUGGING_AVAILABLE;
            ent->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE;
            ent->edx |= HV_FEATURE_EXT_GVA_RANGES_FLUSH;
 
            /*
             * Direct Synthetic timers only make sense with in-kernel
             * LAPIC
             */
            if (!vcpu || lapic_in_kernel(vcpu))
                ent->edx |= HV_STIMER_DIRECT_MODE_AVAILABLE;
 
            break;
 
        case HYPERV_CPUID_ENLIGHTMENT_INFO:
            ent->eax |= HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
            ent->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
            ent->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
            ent->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED;
            ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED;
            if (evmcs_ver)
                ent->eax |= HV_X64_ENLIGHTENED_VMCS_RECOMMENDED;
            if (!cpu_smt_possible())
                ent->eax |= HV_X64_NO_NONARCH_CORESHARING;
 
            ent->eax |= HV_DEPRECATING_AEOI_RECOMMENDED;
            /*
             * Default number of spinlock retry attempts, matches
             * HyperV 2016.
             */
            ent->ebx = 0x00000FFF;
 
            break;
 
        case HYPERV_CPUID_IMPLEMENT_LIMITS:
            /* Maximum number of virtual processors */
            ent->eax = KVM_MAX_VCPUS;
            /*
             * Maximum number of logical processors, matches
             * HyperV 2016.
             */
            ent->ebx = 64;
 
            break;
 
        case HYPERV_CPUID_NESTED_FEATURES:
            ent->eax = evmcs_ver;
            ent->eax |= HV_X64_NESTED_DIRECT_FLUSH;
            ent->eax |= HV_X64_NESTED_MSR_BITMAP;
            ent->ebx |= HV_X64_NESTED_EVMCS1_PERF_GLOBAL_CTRL;
            break;
 
        case HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS:
            memcpy(signature, "Linux KVM Hv", 12);
 
            ent->eax = 0;
            ent->ebx = signature[0];
            ent->ecx = signature[1];
            ent->edx = signature[2];
            break;
 
        case HYPERV_CPUID_SYNDBG_INTERFACE:
            memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12);
            ent->eax = signature[0];
            break;
 
        case HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES:
            ent->eax |= HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
            break;
 
        default:
            break;
        }
    }
 
    if (copy_to_user(entries, cpuid_entries,
             nent * sizeof(struct kvm_cpuid_entry2)))
        return -EFAULT;
 
    return 0;
}

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kvm_get_sparse_vp_set()

static u64 kvm_get_sparse_vp_set ( struct kvm *  kvm, struct kvm_hv_hcall *  hc, u64 *  sparse_banks  )

static

Definition at line 1915 of file hyperv.c.

{
    if (hc->var_cnt > HV_MAX_SPARSE_VCPU_BANKS)
        return -EINVAL;
 
    /* Cap var_cnt to ignore banks that cannot contain a legal VP index. */
    return kvm_hv_get_hc_data(kvm, hc, hc->var_cnt, KVM_HV_MAX_SPARSE_VCPU_SET_BITS,
                  sparse_banks);
}

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kvm_hv_activate_synic()

int kvm_hv_activate_synic	(	struct kvm_vcpu *	vcpu,
		bool	dont_zero_synic_pages
	)

Definition at line 991 of file hyperv.c.

{
    struct kvm_vcpu_hv_synic *synic;
    int r;
 
    r = kvm_hv_vcpu_init(vcpu);
    if (r)
        return r;
 
    synic = to_hv_synic(vcpu);
 
    synic->active = true;
    synic->dont_zero_synic_pages = dont_zero_synic_pages;
    synic->control = HV_SYNIC_CONTROL_ENABLE;
    return 0;
}

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kvm_hv_assist_page_enabled()

bool kvm_hv_assist_page_enabled

(

struct kvm_vcpu *

vcpu

)

Definition at line 911 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    if (!hv_vcpu)
        return false;
 
    if (!(hv_vcpu->hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE))
        return false;
    return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED;
}

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kvm_hv_destroy_vm()

void kvm_hv_destroy_vm

(

struct kvm *

kvm

)

Definition at line 2697 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    struct eventfd_ctx *eventfd;
    int i;
 
    idr_for_each_entry(&hv->conn_to_evt, eventfd, i)
        eventfd_ctx_put(eventfd);
    idr_destroy(&hv->conn_to_evt);
}

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kvm_hv_eventfd_assign()

static int kvm_hv_eventfd_assign ( struct kvm *  kvm, u32  conn_id, int  fd  )

static

Definition at line 2708 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    struct eventfd_ctx *eventfd;
    int ret;
 
    eventfd = eventfd_ctx_fdget(fd);
    if (IS_ERR(eventfd))
        return PTR_ERR(eventfd);
 
    mutex_lock(&hv->hv_lock);
    ret = idr_alloc(&hv->conn_to_evt, eventfd, conn_id, conn_id + 1,
            GFP_KERNEL_ACCOUNT);
    mutex_unlock(&hv->hv_lock);
 
    if (ret >= 0)
        return 0;
 
    if (ret == -ENOSPC)
        ret = -EEXIST;
    eventfd_ctx_put(eventfd);
    return ret;
}

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kvm_hv_eventfd_deassign()

static int kvm_hv_eventfd_deassign ( struct kvm *  kvm, u32  conn_id  )

static

Definition at line 2732 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    struct eventfd_ctx *eventfd;
 
    mutex_lock(&hv->hv_lock);
    eventfd = idr_remove(&hv->conn_to_evt, conn_id);
    mutex_unlock(&hv->hv_lock);
 
    if (!eventfd)
        return -ENOENT;
 
    synchronize_srcu(&kvm->srcu);
    eventfd_ctx_put(eventfd);
    return 0;
}

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kvm_hv_flush_tlb()

static u64 kvm_hv_flush_tlb ( struct kvm_vcpu *  vcpu, struct kvm_hv_hcall *  hc  )

static

Definition at line 2001 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    u64 *sparse_banks = hv_vcpu->sparse_banks;
    struct kvm *kvm = vcpu->kvm;
    struct hv_tlb_flush_ex flush_ex;
    struct hv_tlb_flush flush;
    DECLARE_BITMAP(vcpu_mask, KVM_MAX_VCPUS);
    struct kvm_vcpu_hv_tlb_flush_fifo *tlb_flush_fifo;
    /*
     * Normally, there can be no more than 'KVM_HV_TLB_FLUSH_FIFO_SIZE'
     * entries on the TLB flush fifo. The last entry, however, needs to be
     * always left free for 'flush all' entry which gets placed when
     * there is not enough space to put all the requested entries.
     */
    u64 __tlb_flush_entries[KVM_HV_TLB_FLUSH_FIFO_SIZE - 1];
    u64 *tlb_flush_entries;
    u64 valid_bank_mask;
    struct kvm_vcpu *v;
    unsigned long i;
    bool all_cpus;
 
    /*
     * The Hyper-V TLFS doesn't allow more than HV_MAX_SPARSE_VCPU_BANKS
     * sparse banks. Fail the build if KVM's max allowed number of
     * vCPUs (>4096) exceeds this limit.
     */
    BUILD_BUG_ON(KVM_HV_MAX_SPARSE_VCPU_SET_BITS > HV_MAX_SPARSE_VCPU_BANKS);
 
    /*
     * 'Slow' hypercall's first parameter is the address in guest's memory
     * where hypercall parameters are placed. This is either a GPA or a
     * nested GPA when KVM is handling the call from L2 ('direct' TLB
     * flush).  Translate the address here so the memory can be uniformly
     * read with kvm_read_guest().
     */
    if (!hc->fast && is_guest_mode(vcpu)) {
        hc->ingpa = translate_nested_gpa(vcpu, hc->ingpa, 0, NULL);
        if (unlikely(hc->ingpa == INVALID_GPA))
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
    }
 
    if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST ||
        hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE) {
        if (hc->fast) {
            flush.address_space = hc->ingpa;
            flush.flags = hc->outgpa;
            flush.processor_mask = sse128_lo(hc->xmm[0]);
            hc->consumed_xmm_halves = 1;
        } else {
            if (unlikely(kvm_read_guest(kvm, hc->ingpa,
                            &flush, sizeof(flush))))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
            hc->data_offset = sizeof(flush);
        }
 
        trace_kvm_hv_flush_tlb(flush.processor_mask,
                       flush.address_space, flush.flags,
                       is_guest_mode(vcpu));
 
        valid_bank_mask = BIT_ULL(0);
        sparse_banks[0] = flush.processor_mask;
 
        /*
         * Work around possible WS2012 bug: it sends hypercalls
         * with processor_mask = 0x0 and HV_FLUSH_ALL_PROCESSORS clear,
         * while also expecting us to flush something and crashing if
         * we don't. Let's treat processor_mask == 0 same as
         * HV_FLUSH_ALL_PROCESSORS.
         */
        all_cpus = (flush.flags & HV_FLUSH_ALL_PROCESSORS) ||
            flush.processor_mask == 0;
    } else {
        if (hc->fast) {
            flush_ex.address_space = hc->ingpa;
            flush_ex.flags = hc->outgpa;
            memcpy(&flush_ex.hv_vp_set,
                   &hc->xmm[0], sizeof(hc->xmm[0]));
            hc->consumed_xmm_halves = 2;
        } else {
            if (unlikely(kvm_read_guest(kvm, hc->ingpa, &flush_ex,
                            sizeof(flush_ex))))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
            hc->data_offset = sizeof(flush_ex);
        }
 
        trace_kvm_hv_flush_tlb_ex(flush_ex.hv_vp_set.valid_bank_mask,
                      flush_ex.hv_vp_set.format,
                      flush_ex.address_space,
                      flush_ex.flags, is_guest_mode(vcpu));
 
        valid_bank_mask = flush_ex.hv_vp_set.valid_bank_mask;
        all_cpus = flush_ex.hv_vp_set.format !=
            HV_GENERIC_SET_SPARSE_4K;
 
        if (hc->var_cnt != hweight64(valid_bank_mask))
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
        if (!all_cpus) {
            if (!hc->var_cnt)
                goto ret_success;
 
            if (kvm_get_sparse_vp_set(kvm, hc, sparse_banks))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
        }
 
        /*
         * Hyper-V TLFS doesn't explicitly forbid non-empty sparse vCPU
         * banks (and, thus, non-zero 'var_cnt') for the 'all vCPUs'
         * case (HV_GENERIC_SET_ALL).  Always adjust data_offset and
         * consumed_xmm_halves to make sure TLB flush entries are read
         * from the correct offset.
         */
        if (hc->fast)
            hc->consumed_xmm_halves += hc->var_cnt;
        else
            hc->data_offset += hc->var_cnt * sizeof(sparse_banks[0]);
    }
 
    if (hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE ||
        hc->code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX ||
        hc->rep_cnt > ARRAY_SIZE(__tlb_flush_entries)) {
        tlb_flush_entries = NULL;
    } else {
        if (kvm_hv_get_tlb_flush_entries(kvm, hc, __tlb_flush_entries))
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
        tlb_flush_entries = __tlb_flush_entries;
    }
 
    /*
     * vcpu->arch.cr3 may not be up-to-date for running vCPUs so we can't
     * analyze it here, flush TLB regardless of the specified address space.
     */
    if (all_cpus && !is_guest_mode(vcpu)) {
        kvm_for_each_vcpu(i, v, kvm) {
            tlb_flush_fifo = kvm_hv_get_tlb_flush_fifo(v, false);
            hv_tlb_flush_enqueue(v, tlb_flush_fifo,
                         tlb_flush_entries, hc->rep_cnt);
        }
 
        kvm_make_all_cpus_request(kvm, KVM_REQ_HV_TLB_FLUSH);
    } else if (!is_guest_mode(vcpu)) {
        sparse_set_to_vcpu_mask(kvm, sparse_banks, valid_bank_mask, vcpu_mask);
 
        for_each_set_bit(i, vcpu_mask, KVM_MAX_VCPUS) {
            v = kvm_get_vcpu(kvm, i);
            if (!v)
                continue;
            tlb_flush_fifo = kvm_hv_get_tlb_flush_fifo(v, false);
            hv_tlb_flush_enqueue(v, tlb_flush_fifo,
                         tlb_flush_entries, hc->rep_cnt);
        }
 
        kvm_make_vcpus_request_mask(kvm, KVM_REQ_HV_TLB_FLUSH, vcpu_mask);
    } else {
        struct kvm_vcpu_hv *hv_v;
 
        bitmap_zero(vcpu_mask, KVM_MAX_VCPUS);
 
        kvm_for_each_vcpu(i, v, kvm) {
            hv_v = to_hv_vcpu(v);
 
            /*
             * The following check races with nested vCPUs entering/exiting
             * and/or migrating between L1's vCPUs, however the only case when
             * KVM *must* flush the TLB is when the target L2 vCPU keeps
             * running on the same L1 vCPU from the moment of the request until
             * kvm_hv_flush_tlb() returns. TLB is fully flushed in all other
             * cases, e.g. when the target L2 vCPU migrates to a different L1
             * vCPU or when the corresponding L1 vCPU temporary switches to a
             * different L2 vCPU while the request is being processed.
             */
            if (!hv_v || hv_v->nested.vm_id != hv_vcpu->nested.vm_id)
                continue;
 
            if (!all_cpus &&
                !hv_is_vp_in_sparse_set(hv_v->nested.vp_id, valid_bank_mask,
                            sparse_banks))
                continue;
 
            __set_bit(i, vcpu_mask);
            tlb_flush_fifo = kvm_hv_get_tlb_flush_fifo(v, true);
            hv_tlb_flush_enqueue(v, tlb_flush_fifo,
                         tlb_flush_entries, hc->rep_cnt);
        }
 
        kvm_make_vcpus_request_mask(kvm, KVM_REQ_HV_TLB_FLUSH, vcpu_mask);
    }
 
ret_success:
    /* We always do full TLB flush, set 'Reps completed' = 'Rep Count' */
    return (u64)HV_STATUS_SUCCESS |
        ((u64)hc->rep_cnt << HV_HYPERCALL_REP_COMP_OFFSET);
}

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kvm_hv_get_assist_page()

int kvm_hv_get_assist_page

(

struct kvm_vcpu *

vcpu

)

Definition at line 924 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    if (!hv_vcpu || !kvm_hv_assist_page_enabled(vcpu))
        return -EFAULT;
 
    return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data,
                     &hv_vcpu->vp_assist_page, sizeof(struct hv_vp_assist_page));
}

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kvm_hv_get_hc_data()

static int kvm_hv_get_hc_data ( struct kvm *  kvm, struct kvm_hv_hcall *  hc, u16  orig_cnt, u16  cnt_cap, u64 *  data  )

static

Definition at line 1882 of file hyperv.c.

{
    /*
     * Preserve the original count when ignoring entries via a "cap", KVM
     * still needs to validate the guest input (though the non-XMM path
     * punts on the checks).
     */
    u16 cnt = min(orig_cnt, cnt_cap);
    int i, j;
 
    if (hc->fast) {
        /*
         * Each XMM holds two sparse banks, but do not count halves that
         * have already been consumed for hypercall parameters.
         */
        if (orig_cnt > 2 * HV_HYPERCALL_MAX_XMM_REGISTERS - hc->consumed_xmm_halves)
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
        for (i = 0; i < cnt; i++) {
            j = i + hc->consumed_xmm_halves;
            if (j % 2)
                data[i] = sse128_hi(hc->xmm[j / 2]);
            else
                data[i] = sse128_lo(hc->xmm[j / 2]);
        }
        return 0;
    }
 
    return kvm_read_guest(kvm, hc->ingpa + hc->data_offset, data,
                  cnt * sizeof(*data));
}

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kvm_hv_get_msr()

static int kvm_hv_get_msr ( struct kvm_vcpu *  vcpu, u32  msr, u64 *  pdata, bool  host  )

static

Definition at line 1686 of file hyperv.c.

{
    u64 data = 0;
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    if (unlikely(!host && !hv_check_msr_access(hv_vcpu, msr)))
        return 1;
 
    switch (msr) {
    case HV_X64_MSR_VP_INDEX:
        data = hv_vcpu->vp_index;
        break;
    case HV_X64_MSR_EOI:
        return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
    case HV_X64_MSR_ICR:
        return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
    case HV_X64_MSR_TPR:
        return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
    case HV_X64_MSR_VP_ASSIST_PAGE:
        data = hv_vcpu->hv_vapic;
        break;
    case HV_X64_MSR_VP_RUNTIME:
        data = current_task_runtime_100ns() + hv_vcpu->runtime_offset;
        break;
    case HV_X64_MSR_SCONTROL:
    case HV_X64_MSR_SVERSION:
    case HV_X64_MSR_SIEFP:
    case HV_X64_MSR_SIMP:
    case HV_X64_MSR_EOM:
    case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
        return synic_get_msr(to_hv_synic(vcpu), msr, pdata, host);
    case HV_X64_MSR_STIMER0_CONFIG:
    case HV_X64_MSR_STIMER1_CONFIG:
    case HV_X64_MSR_STIMER2_CONFIG:
    case HV_X64_MSR_STIMER3_CONFIG: {
        int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
 
        return stimer_get_config(to_hv_stimer(vcpu, timer_index),
                     pdata);
    }
    case HV_X64_MSR_STIMER0_COUNT:
    case HV_X64_MSR_STIMER1_COUNT:
    case HV_X64_MSR_STIMER2_COUNT:
    case HV_X64_MSR_STIMER3_COUNT: {
        int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
 
        return stimer_get_count(to_hv_stimer(vcpu, timer_index),
                    pdata);
    }
    case HV_X64_MSR_TSC_FREQUENCY:
        data = (u64)vcpu->arch.virtual_tsc_khz * 1000;
        break;
    case HV_X64_MSR_APIC_FREQUENCY:
        data = APIC_BUS_FREQUENCY;
        break;
    default:
        kvm_pr_unimpl_rdmsr(vcpu, msr);
        return 1;
    }
    *pdata = data;
    return 0;
}

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kvm_hv_get_msr_common()

int kvm_hv_get_msr_common	(	struct kvm_vcpu *	vcpu,
		u32	msr,
		u64 *	pdata,
		bool	host
	)

Definition at line 1771 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
 
    if (!host && !vcpu->arch.hyperv_enabled)
        return 1;
 
    if (kvm_hv_vcpu_init(vcpu))
        return 1;
 
    if (kvm_hv_msr_partition_wide(msr)) {
        int r;
 
        mutex_lock(&hv->hv_lock);
        r = kvm_hv_get_msr_pw(vcpu, msr, pdata, host);
        mutex_unlock(&hv->hv_lock);
        return r;
    } else
        return kvm_hv_get_msr(vcpu, msr, pdata, host);
}

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kvm_hv_get_msr_pw()

static int kvm_hv_get_msr_pw ( struct kvm_vcpu *  vcpu, u32  msr, u64 *  pdata, bool  host  )

static

Definition at line 1630 of file hyperv.c.

{
    u64 data = 0;
    struct kvm *kvm = vcpu->kvm;
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    if (unlikely(!host && !hv_check_msr_access(to_hv_vcpu(vcpu), msr)))
        return 1;
 
    switch (msr) {
    case HV_X64_MSR_GUEST_OS_ID:
        data = hv->hv_guest_os_id;
        break;
    case HV_X64_MSR_HYPERCALL:
        data = hv->hv_hypercall;
        break;
    case HV_X64_MSR_TIME_REF_COUNT:
        data = get_time_ref_counter(kvm);
        break;
    case HV_X64_MSR_REFERENCE_TSC:
        data = hv->hv_tsc_page;
        break;
    case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
        return kvm_hv_msr_get_crash_data(kvm,
                         msr - HV_X64_MSR_CRASH_P0,
                         pdata);
    case HV_X64_MSR_CRASH_CTL:
        return kvm_hv_msr_get_crash_ctl(kvm, pdata);
    case HV_X64_MSR_RESET:
        data = 0;
        break;
    case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
        data = hv->hv_reenlightenment_control;
        break;
    case HV_X64_MSR_TSC_EMULATION_CONTROL:
        data = hv->hv_tsc_emulation_control;
        break;
    case HV_X64_MSR_TSC_EMULATION_STATUS:
        data = hv->hv_tsc_emulation_status;
        break;
    case HV_X64_MSR_TSC_INVARIANT_CONTROL:
        data = hv->hv_invtsc_control;
        break;
    case HV_X64_MSR_SYNDBG_OPTIONS:
    case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        return syndbg_get_msr(vcpu, msr, pdata, host);
    default:
        kvm_pr_unimpl_rdmsr(vcpu, msr);
        return 1;
    }
 
    *pdata = data;
    return 0;
}

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kvm_hv_get_tlb_flush_entries()

static int kvm_hv_get_tlb_flush_entries ( struct kvm *  kvm, struct kvm_hv_hcall *  hc, u64  entries[]  )

static

Definition at line 1926 of file hyperv.c.

{
    return kvm_hv_get_hc_data(kvm, hc, hc->rep_cnt, hc->rep_cnt, entries);
}

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kvm_hv_hypercall()

int kvm_hv_hypercall

(

struct kvm_vcpu *

vcpu

)

Definition at line 2519 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    struct kvm_hv_hcall hc;
    u64 ret = HV_STATUS_SUCCESS;
 
    /*
     * hypercall generates UD from non zero cpl and real mode
     * per HYPER-V spec
     */
    if (static_call(kvm_x86_get_cpl)(vcpu) != 0 || !is_protmode(vcpu)) {
        kvm_queue_exception(vcpu, UD_VECTOR);
        return 1;
    }
 
#ifdef CONFIG_X86_64
    if (is_64_bit_hypercall(vcpu)) {
        hc.param = kvm_rcx_read(vcpu);
        hc.ingpa = kvm_rdx_read(vcpu);
        hc.outgpa = kvm_r8_read(vcpu);
    } else
#endif
    {
        hc.param = ((u64)kvm_rdx_read(vcpu) << 32) |
                (kvm_rax_read(vcpu) & 0xffffffff);
        hc.ingpa = ((u64)kvm_rbx_read(vcpu) << 32) |
                (kvm_rcx_read(vcpu) & 0xffffffff);
        hc.outgpa = ((u64)kvm_rdi_read(vcpu) << 32) |
                 (kvm_rsi_read(vcpu) & 0xffffffff);
    }
 
    hc.code = hc.param & 0xffff;
    hc.var_cnt = (hc.param & HV_HYPERCALL_VARHEAD_MASK) >> HV_HYPERCALL_VARHEAD_OFFSET;
    hc.fast = !!(hc.param & HV_HYPERCALL_FAST_BIT);
    hc.rep_cnt = (hc.param >> HV_HYPERCALL_REP_COMP_OFFSET) & 0xfff;
    hc.rep_idx = (hc.param >> HV_HYPERCALL_REP_START_OFFSET) & 0xfff;
    hc.rep = !!(hc.rep_cnt || hc.rep_idx);
 
    trace_kvm_hv_hypercall(hc.code, hc.fast, hc.var_cnt, hc.rep_cnt,
                   hc.rep_idx, hc.ingpa, hc.outgpa);
 
    if (unlikely(!hv_check_hypercall_access(hv_vcpu, hc.code))) {
        ret = HV_STATUS_ACCESS_DENIED;
        goto hypercall_complete;
    }
 
    if (unlikely(hc.param & HV_HYPERCALL_RSVD_MASK)) {
        ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
        goto hypercall_complete;
    }
 
    if (hc.fast && is_xmm_fast_hypercall(&hc)) {
        if (unlikely(hv_vcpu->enforce_cpuid &&
                 !(hv_vcpu->cpuid_cache.features_edx &
                   HV_X64_HYPERCALL_XMM_INPUT_AVAILABLE))) {
            kvm_queue_exception(vcpu, UD_VECTOR);
            return 1;
        }
 
        kvm_hv_hypercall_read_xmm(&hc);
    }
 
    switch (hc.code) {
    case HVCALL_NOTIFY_LONG_SPIN_WAIT:
        if (unlikely(hc.rep || hc.var_cnt)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        kvm_vcpu_on_spin(vcpu, true);
        break;
    case HVCALL_SIGNAL_EVENT:
        if (unlikely(hc.rep || hc.var_cnt)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        ret = kvm_hvcall_signal_event(vcpu, &hc);
        if (ret != HV_STATUS_INVALID_PORT_ID)
            break;
        fallthrough;    /* maybe userspace knows this conn_id */
    case HVCALL_POST_MESSAGE:
        /* don't bother userspace if it has no way to handle it */
        if (unlikely(hc.rep || hc.var_cnt || !to_hv_synic(vcpu)->active)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        goto hypercall_userspace_exit;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
        if (unlikely(hc.var_cnt)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        fallthrough;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
        if (unlikely(!hc.rep_cnt || hc.rep_idx)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        ret = kvm_hv_flush_tlb(vcpu, &hc);
        break;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
        if (unlikely(hc.var_cnt)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        fallthrough;
    case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
        if (unlikely(hc.rep)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        ret = kvm_hv_flush_tlb(vcpu, &hc);
        break;
    case HVCALL_SEND_IPI:
        if (unlikely(hc.var_cnt)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        fallthrough;
    case HVCALL_SEND_IPI_EX:
        if (unlikely(hc.rep)) {
            ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
            break;
        }
        ret = kvm_hv_send_ipi(vcpu, &hc);
        break;
    case HVCALL_POST_DEBUG_DATA:
    case HVCALL_RETRIEVE_DEBUG_DATA:
        if (unlikely(hc.fast)) {
            ret = HV_STATUS_INVALID_PARAMETER;
            break;
        }
        fallthrough;
    case HVCALL_RESET_DEBUG_SESSION: {
        struct kvm_hv_syndbg *syndbg = to_hv_syndbg(vcpu);
 
        if (!kvm_hv_is_syndbg_enabled(vcpu)) {
            ret = HV_STATUS_INVALID_HYPERCALL_CODE;
            break;
        }
 
        if (!(syndbg->options & HV_X64_SYNDBG_OPTION_USE_HCALLS)) {
            ret = HV_STATUS_OPERATION_DENIED;
            break;
        }
        goto hypercall_userspace_exit;
    }
    case HV_EXT_CALL_QUERY_CAPABILITIES ... HV_EXT_CALL_MAX:
        if (unlikely(hc.fast)) {
            ret = HV_STATUS_INVALID_PARAMETER;
            break;
        }
        goto hypercall_userspace_exit;
    default:
        ret = HV_STATUS_INVALID_HYPERCALL_CODE;
        break;
    }
 
hypercall_complete:
    return kvm_hv_hypercall_complete(vcpu, ret);
 
hypercall_userspace_exit:
    vcpu->run->exit_reason = KVM_EXIT_HYPERV;
    vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL;
    vcpu->run->hyperv.u.hcall.input = hc.param;
    vcpu->run->hyperv.u.hcall.params[0] = hc.ingpa;
    vcpu->run->hyperv.u.hcall.params[1] = hc.outgpa;
    vcpu->arch.complete_userspace_io = kvm_hv_hypercall_complete_userspace;
    return 0;
}

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kvm_hv_hypercall_complete()

static int kvm_hv_hypercall_complete ( struct kvm_vcpu *  vcpu, u64  result  )

static

Definition at line 2376 of file hyperv.c.

{
    u32 tlb_lock_count = 0;
    int ret;
 
    if (hv_result_success(result) && is_guest_mode(vcpu) &&
        kvm_hv_is_tlb_flush_hcall(vcpu) &&
        kvm_read_guest(vcpu->kvm, to_hv_vcpu(vcpu)->nested.pa_page_gpa,
               &tlb_lock_count, sizeof(tlb_lock_count)))
        result = HV_STATUS_INVALID_HYPERCALL_INPUT;
 
    trace_kvm_hv_hypercall_done(result);
    kvm_hv_hypercall_set_result(vcpu, result);
    ++vcpu->stat.hypercalls;
 
    ret = kvm_skip_emulated_instruction(vcpu);
 
    if (tlb_lock_count)
        kvm_x86_ops.nested_ops->hv_inject_synthetic_vmexit_post_tlb_flush(vcpu);
 
    return ret;
}

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kvm_hv_hypercall_complete_userspace()

static int kvm_hv_hypercall_complete_userspace ( struct kvm_vcpu *  vcpu )

static

Definition at line 2399 of file hyperv.c.

{
    return kvm_hv_hypercall_complete(vcpu, vcpu->run->hyperv.u.hcall.result);
}

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kvm_hv_hypercall_read_xmm()

static void kvm_hv_hypercall_read_xmm ( struct kvm_hv_hcall *  hc )

static

Definition at line 2459 of file hyperv.c.

{
    int reg;
 
    kvm_fpu_get();
    for (reg = 0; reg < HV_HYPERCALL_MAX_XMM_REGISTERS; reg++)
        _kvm_read_sse_reg(reg, &hc->xmm[reg]);
    kvm_fpu_put();
}

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kvm_hv_hypercall_set_result()

static void kvm_hv_hypercall_set_result ( struct kvm_vcpu *  vcpu, u64  result  )

static

Definition at line 2363 of file hyperv.c.

{
    bool longmode;
 
    longmode = is_64_bit_hypercall(vcpu);
    if (longmode)
        kvm_rax_write(vcpu, result);
    else {
        kvm_rdx_write(vcpu, result >> 32);
        kvm_rax_write(vcpu, result & 0xffffffff);
    }
}

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kvm_hv_init_vm()

void kvm_hv_init_vm

(

struct kvm *

kvm

)

Definition at line 2689 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    mutex_init(&hv->hv_lock);
    idr_init(&hv->conn_to_evt);
}

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kvm_hv_irq_routing_update()

void kvm_hv_irq_routing_update

(

struct kvm *

kvm

)

Definition at line 538 of file hyperv.c.

{
    struct kvm_irq_routing_table *irq_rt;
    struct kvm_kernel_irq_routing_entry *e;
    u32 gsi;
 
    irq_rt = srcu_dereference_check(kvm->irq_routing, &kvm->irq_srcu,
                    lockdep_is_held(&kvm->irq_lock));
 
    for (gsi = 0; gsi < irq_rt->nr_rt_entries; gsi++) {
        hlist_for_each_entry(e, &irq_rt->map[gsi], link) {
            if (e->type == KVM_IRQ_ROUTING_HV_SINT)
                kvm_hv_set_sint_gsi(kvm, e->hv_sint.vcpu,
                            e->hv_sint.sint, gsi);
        }
    }
}

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kvm_hv_is_syndbg_enabled()

static bool kvm_hv_is_syndbg_enabled ( struct kvm_vcpu *  vcpu )

static

Definition at line 328 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    return hv_vcpu->cpuid_cache.syndbg_cap_eax &
        HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
}

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kvm_hv_msr_get_crash_ctl()

static int kvm_hv_msr_get_crash_ctl ( struct kvm *  kvm, u64 *  pdata  )

static

Definition at line 1045 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    *pdata = hv->hv_crash_ctl;
    return 0;
}

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kvm_hv_msr_get_crash_data()

static int kvm_hv_msr_get_crash_data ( struct kvm *  kvm, u32  index, u64 *  pdata  )

static

Definition at line 1033 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    size_t size = ARRAY_SIZE(hv->hv_crash_param);
 
    if (WARN_ON_ONCE(index >= size))
        return -EINVAL;
 
    *pdata = hv->hv_crash_param[array_index_nospec(index, size)];
    return 0;
}

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kvm_hv_msr_partition_wide()

static bool kvm_hv_msr_partition_wide ( u32  msr )

static

Definition at line 1008 of file hyperv.c.

{
    bool r = false;
 
    switch (msr) {
    case HV_X64_MSR_GUEST_OS_ID:
    case HV_X64_MSR_HYPERCALL:
    case HV_X64_MSR_REFERENCE_TSC:
    case HV_X64_MSR_TIME_REF_COUNT:
    case HV_X64_MSR_CRASH_CTL:
    case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
    case HV_X64_MSR_RESET:
    case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
    case HV_X64_MSR_TSC_EMULATION_CONTROL:
    case HV_X64_MSR_TSC_EMULATION_STATUS:
    case HV_X64_MSR_TSC_INVARIANT_CONTROL:
    case HV_X64_MSR_SYNDBG_OPTIONS:
    case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        r = true;
        break;
    }
 
    return r;
}

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kvm_hv_msr_set_crash_ctl()

static int kvm_hv_msr_set_crash_ctl ( struct kvm *  kvm, u64  data  )

static

Definition at line 1053 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    hv->hv_crash_ctl = data & HV_CRASH_CTL_CRASH_NOTIFY;
 
    return 0;
}

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kvm_hv_msr_set_crash_data()

static int kvm_hv_msr_set_crash_data ( struct kvm *  kvm, u32  index, u64  data  )

static

Definition at line 1062 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    size_t size = ARRAY_SIZE(hv->hv_crash_param);
 
    if (WARN_ON_ONCE(index >= size))
        return -EINVAL;
 
    hv->hv_crash_param[array_index_nospec(index, size)] = data;
    return 0;
}

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kvm_hv_notify_acked_sint()

static void kvm_hv_notify_acked_sint ( struct kvm_vcpu *  vcpu, u32  sint  )

static

Definition at line 219 of file hyperv.c.

{
    struct kvm *kvm = vcpu->kvm;
    struct kvm_vcpu_hv_synic *synic = to_hv_synic(vcpu);
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    struct kvm_vcpu_hv_stimer *stimer;
    int gsi, idx;
 
    trace_kvm_hv_notify_acked_sint(vcpu->vcpu_id, sint);
 
    /* Try to deliver pending Hyper-V SynIC timers messages */
    for (idx = 0; idx < ARRAY_SIZE(hv_vcpu->stimer); idx++) {
        stimer = &hv_vcpu->stimer[idx];
        if (stimer->msg_pending && stimer->config.enable &&
            !stimer->config.direct_mode &&
            stimer->config.sintx == sint)
            stimer_mark_pending(stimer, false);
    }
 
    idx = srcu_read_lock(&kvm->irq_srcu);
    gsi = atomic_read(&synic->sint_to_gsi[sint]);
    if (gsi != -1)
        kvm_notify_acked_gsi(kvm, gsi);
    srcu_read_unlock(&kvm->irq_srcu, idx);
}

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kvm_hv_process_stimers()

void kvm_hv_process_stimers

(

struct kvm_vcpu *

vcpu

)

Definition at line 863 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    struct kvm_vcpu_hv_stimer *stimer;
    u64 time_now, exp_time;
    int i;
 
    if (!hv_vcpu)
        return;
 
    for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
        if (test_and_clear_bit(i, hv_vcpu->stimer_pending_bitmap)) {
            stimer = &hv_vcpu->stimer[i];
            if (stimer->config.enable) {
                exp_time = stimer->exp_time;
 
                if (exp_time) {
                    time_now =
                        get_time_ref_counter(vcpu->kvm);
                    if (time_now >= exp_time)
                        stimer_expiration(stimer);
                }
 
                if ((stimer->config.enable) &&
                    stimer->count) {
                    if (!stimer->msg_pending)
                        stimer_start(stimer);
                } else
                    stimer_cleanup(stimer);
            }
        }
}

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kvm_hv_request_tsc_page_update()

void kvm_hv_request_tsc_page_update

(

struct kvm *

kvm

)

Definition at line 1236 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    mutex_lock(&hv->hv_lock);
 
    if (hv->hv_tsc_page_status == HV_TSC_PAGE_SET &&
        !tsc_page_update_unsafe(hv))
        hv->hv_tsc_page_status = HV_TSC_PAGE_HOST_CHANGED;
 
    mutex_unlock(&hv->hv_lock);
}

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kvm_hv_send_ipi()

static u64 kvm_hv_send_ipi ( struct kvm_vcpu *  vcpu, struct kvm_hv_hcall *  hc  )

static

Definition at line 2217 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    u64 *sparse_banks = hv_vcpu->sparse_banks;
    struct kvm *kvm = vcpu->kvm;
    struct hv_send_ipi_ex send_ipi_ex;
    struct hv_send_ipi send_ipi;
    u64 valid_bank_mask;
    u32 vector;
    bool all_cpus;
 
    if (hc->code == HVCALL_SEND_IPI) {
        if (!hc->fast) {
            if (unlikely(kvm_read_guest(kvm, hc->ingpa, &send_ipi,
                            sizeof(send_ipi))))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
            sparse_banks[0] = send_ipi.cpu_mask;
            vector = send_ipi.vector;
        } else {
            /* 'reserved' part of hv_send_ipi should be 0 */
            if (unlikely(hc->ingpa >> 32 != 0))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
            sparse_banks[0] = hc->outgpa;
            vector = (u32)hc->ingpa;
        }
        all_cpus = false;
        valid_bank_mask = BIT_ULL(0);
 
        trace_kvm_hv_send_ipi(vector, sparse_banks[0]);
    } else {
        if (!hc->fast) {
            if (unlikely(kvm_read_guest(kvm, hc->ingpa, &send_ipi_ex,
                            sizeof(send_ipi_ex))))
                return HV_STATUS_INVALID_HYPERCALL_INPUT;
        } else {
            send_ipi_ex.vector = (u32)hc->ingpa;
            send_ipi_ex.vp_set.format = hc->outgpa;
            send_ipi_ex.vp_set.valid_bank_mask = sse128_lo(hc->xmm[0]);
        }
 
        trace_kvm_hv_send_ipi_ex(send_ipi_ex.vector,
                     send_ipi_ex.vp_set.format,
                     send_ipi_ex.vp_set.valid_bank_mask);
 
        vector = send_ipi_ex.vector;
        valid_bank_mask = send_ipi_ex.vp_set.valid_bank_mask;
        all_cpus = send_ipi_ex.vp_set.format == HV_GENERIC_SET_ALL;
 
        if (hc->var_cnt != hweight64(valid_bank_mask))
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
        if (all_cpus)
            goto check_and_send_ipi;
 
        if (!hc->var_cnt)
            goto ret_success;
 
        if (!hc->fast)
            hc->data_offset = offsetof(struct hv_send_ipi_ex,
                           vp_set.bank_contents);
        else
            hc->consumed_xmm_halves = 1;
 
        if (kvm_get_sparse_vp_set(kvm, hc, sparse_banks))
            return HV_STATUS_INVALID_HYPERCALL_INPUT;
    }
 
check_and_send_ipi:
    if ((vector < HV_IPI_LOW_VECTOR) || (vector > HV_IPI_HIGH_VECTOR))
        return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
    if (all_cpus)
        kvm_hv_send_ipi_to_many(kvm, vector, NULL, 0);
    else
        kvm_hv_send_ipi_to_many(kvm, vector, sparse_banks, valid_bank_mask);
 
ret_success:
    return HV_STATUS_SUCCESS;
}

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kvm_hv_send_ipi_to_many()

static void kvm_hv_send_ipi_to_many ( struct kvm *  kvm, u32  vector, u64 *  sparse_banks, u64  valid_bank_mask  )

static

Definition at line 2196 of file hyperv.c.

{
    struct kvm_lapic_irq irq = {
        .delivery_mode = APIC_DM_FIXED,
        .vector = vector
    };
    struct kvm_vcpu *vcpu;
    unsigned long i;
 
    kvm_for_each_vcpu(i, vcpu, kvm) {
        if (sparse_banks &&
            !hv_is_vp_in_sparse_set(kvm_hv_get_vpindex(vcpu),
                        valid_bank_mask, sparse_banks))
            continue;
 
        /* We fail only when APIC is disabled */
        kvm_apic_set_irq(vcpu, &irq, NULL);
    }
}

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kvm_hv_set_cpuid()

void kvm_hv_set_cpuid	(	struct kvm_vcpu *	vcpu,
		bool	hyperv_enabled
	)

Definition at line 2297 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    struct kvm_cpuid_entry2 *entry;
 
    vcpu->arch.hyperv_enabled = hyperv_enabled;
 
    if (!hv_vcpu) {
        /*
         * KVM should have already allocated kvm_vcpu_hv if Hyper-V is
         * enabled in CPUID.
         */
        WARN_ON_ONCE(vcpu->arch.hyperv_enabled);
        return;
    }
 
    memset(&hv_vcpu->cpuid_cache, 0, sizeof(hv_vcpu->cpuid_cache));
 
    if (!vcpu->arch.hyperv_enabled)
        return;
 
    entry = kvm_find_cpuid_entry(vcpu, HYPERV_CPUID_FEATURES);
    if (entry) {
        hv_vcpu->cpuid_cache.features_eax = entry->eax;
        hv_vcpu->cpuid_cache.features_ebx = entry->ebx;
        hv_vcpu->cpuid_cache.features_edx = entry->edx;
    }
 
    entry = kvm_find_cpuid_entry(vcpu, HYPERV_CPUID_ENLIGHTMENT_INFO);
    if (entry) {
        hv_vcpu->cpuid_cache.enlightenments_eax = entry->eax;
        hv_vcpu->cpuid_cache.enlightenments_ebx = entry->ebx;
    }
 
    entry = kvm_find_cpuid_entry(vcpu, HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES);
    if (entry)
        hv_vcpu->cpuid_cache.syndbg_cap_eax = entry->eax;
 
    entry = kvm_find_cpuid_entry(vcpu, HYPERV_CPUID_NESTED_FEATURES);
    if (entry) {
        hv_vcpu->cpuid_cache.nested_eax = entry->eax;
        hv_vcpu->cpuid_cache.nested_ebx = entry->ebx;
    }
}

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kvm_hv_set_enforce_cpuid()

int kvm_hv_set_enforce_cpuid	(	struct kvm_vcpu *	vcpu,
		bool	enforce
	)

Definition at line 2342 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu;
    int ret = 0;
 
    if (!to_hv_vcpu(vcpu)) {
        if (enforce) {
            ret = kvm_hv_vcpu_init(vcpu);
            if (ret)
                return ret;
        } else {
            return 0;
        }
    }
 
    hv_vcpu = to_hv_vcpu(vcpu);
    hv_vcpu->enforce_cpuid = enforce;
 
    return ret;
}

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kvm_hv_set_msr()

static int kvm_hv_set_msr ( struct kvm_vcpu *  vcpu, u32  msr, u64  data, bool  host  )

static

Definition at line 1518 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    if (unlikely(!host && !hv_check_msr_access(hv_vcpu, msr)))
        return 1;
 
    switch (msr) {
    case HV_X64_MSR_VP_INDEX: {
        struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
        u32 new_vp_index = (u32)data;
 
        if (!host || new_vp_index >= KVM_MAX_VCPUS)
            return 1;
 
        if (new_vp_index == hv_vcpu->vp_index)
            return 0;
 
        /*
         * The VP index is initialized to vcpu_index by
         * kvm_hv_vcpu_postcreate so they initially match.  Now the
         * VP index is changing, adjust num_mismatched_vp_indexes if
         * it now matches or no longer matches vcpu_idx.
         */
        if (hv_vcpu->vp_index == vcpu->vcpu_idx)
            atomic_inc(&hv->num_mismatched_vp_indexes);
        else if (new_vp_index == vcpu->vcpu_idx)
            atomic_dec(&hv->num_mismatched_vp_indexes);
 
        hv_vcpu->vp_index = new_vp_index;
        break;
    }
    case HV_X64_MSR_VP_ASSIST_PAGE: {
        u64 gfn;
        unsigned long addr;
 
        if (!(data & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE)) {
            hv_vcpu->hv_vapic = data;
            if (kvm_lapic_set_pv_eoi(vcpu, 0, 0))
                return 1;
            break;
        }
        gfn = data >> HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT;
        addr = kvm_vcpu_gfn_to_hva(vcpu, gfn);
        if (kvm_is_error_hva(addr))
            return 1;
 
        /*
         * Clear apic_assist portion of struct hv_vp_assist_page
         * only, there can be valuable data in the rest which needs
         * to be preserved e.g. on migration.
         */
        if (__put_user(0, (u32 __user *)addr))
            return 1;
        hv_vcpu->hv_vapic = data;
        kvm_vcpu_mark_page_dirty(vcpu, gfn);
        if (kvm_lapic_set_pv_eoi(vcpu,
                        gfn_to_gpa(gfn) | KVM_MSR_ENABLED,
                        sizeof(struct hv_vp_assist_page)))
            return 1;
        break;
    }
    case HV_X64_MSR_EOI:
        return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
    case HV_X64_MSR_ICR:
        return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
    case HV_X64_MSR_TPR:
        return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
    case HV_X64_MSR_VP_RUNTIME:
        if (!host)
            return 1;
        hv_vcpu->runtime_offset = data - current_task_runtime_100ns();
        break;
    case HV_X64_MSR_SCONTROL:
    case HV_X64_MSR_SVERSION:
    case HV_X64_MSR_SIEFP:
    case HV_X64_MSR_SIMP:
    case HV_X64_MSR_EOM:
    case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
        return synic_set_msr(to_hv_synic(vcpu), msr, data, host);
    case HV_X64_MSR_STIMER0_CONFIG:
    case HV_X64_MSR_STIMER1_CONFIG:
    case HV_X64_MSR_STIMER2_CONFIG:
    case HV_X64_MSR_STIMER3_CONFIG: {
        int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
 
        return stimer_set_config(to_hv_stimer(vcpu, timer_index),
                     data, host);
    }
    case HV_X64_MSR_STIMER0_COUNT:
    case HV_X64_MSR_STIMER1_COUNT:
    case HV_X64_MSR_STIMER2_COUNT:
    case HV_X64_MSR_STIMER3_COUNT: {
        int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
 
        return stimer_set_count(to_hv_stimer(vcpu, timer_index),
                    data, host);
    }
    case HV_X64_MSR_TSC_FREQUENCY:
    case HV_X64_MSR_APIC_FREQUENCY:
        /* read-only, but still ignore it if host-initiated */
        if (!host)
            return 1;
        break;
    default:
        kvm_pr_unimpl_wrmsr(vcpu, msr, data);
        return 1;
    }
 
    return 0;
}

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kvm_hv_set_msr_common()

int kvm_hv_set_msr_common	(	struct kvm_vcpu *	vcpu,
		u32	msr,
		u64	data,
		bool	host
	)

Definition at line 1750 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
 
    if (!host && !vcpu->arch.hyperv_enabled)
        return 1;
 
    if (kvm_hv_vcpu_init(vcpu))
        return 1;
 
    if (kvm_hv_msr_partition_wide(msr)) {
        int r;
 
        mutex_lock(&hv->hv_lock);
        r = kvm_hv_set_msr_pw(vcpu, msr, data, host);
        mutex_unlock(&hv->hv_lock);
        return r;
    } else
        return kvm_hv_set_msr(vcpu, msr, data, host);
}

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kvm_hv_set_msr_pw()

static int kvm_hv_set_msr_pw ( struct kvm_vcpu *  vcpu, u32  msr, u64  data, bool  host  )

static

Definition at line 1375 of file hyperv.c.

{
    struct kvm *kvm = vcpu->kvm;
    struct kvm_hv *hv = to_kvm_hv(kvm);
 
    if (unlikely(!host && !hv_check_msr_access(to_hv_vcpu(vcpu), msr)))
        return 1;
 
    switch (msr) {
    case HV_X64_MSR_GUEST_OS_ID:
        hv->hv_guest_os_id = data;
        /* setting guest os id to zero disables hypercall page */
        if (!hv->hv_guest_os_id)
            hv->hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
        break;
    case HV_X64_MSR_HYPERCALL: {
        u8 instructions[9];
        int i = 0;
        u64 addr;
 
        /* if guest os id is not set hypercall should remain disabled */
        if (!hv->hv_guest_os_id)
            break;
        if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
            hv->hv_hypercall = data;
            break;
        }
 
        /*
         * If Xen and Hyper-V hypercalls are both enabled, disambiguate
         * the same way Xen itself does, by setting the bit 31 of EAX
         * which is RsvdZ in the 32-bit Hyper-V hypercall ABI and just
         * going to be clobbered on 64-bit.
         */
        if (kvm_xen_hypercall_enabled(kvm)) {
            /* orl $0x80000000, %eax */
            instructions[i++] = 0x0d;
            instructions[i++] = 0x00;
            instructions[i++] = 0x00;
            instructions[i++] = 0x00;
            instructions[i++] = 0x80;
        }
 
        /* vmcall/vmmcall */
        static_call(kvm_x86_patch_hypercall)(vcpu, instructions + i);
        i += 3;
 
        /* ret */
        ((unsigned char *)instructions)[i++] = 0xc3;
 
        addr = data & HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_MASK;
        if (kvm_vcpu_write_guest(vcpu, addr, instructions, i))
            return 1;
        hv->hv_hypercall = data;
        break;
    }
    case HV_X64_MSR_REFERENCE_TSC:
        hv->hv_tsc_page = data;
        if (hv->hv_tsc_page & HV_X64_MSR_TSC_REFERENCE_ENABLE) {
            if (!host)
                hv->hv_tsc_page_status = HV_TSC_PAGE_GUEST_CHANGED;
            else
                hv->hv_tsc_page_status = HV_TSC_PAGE_HOST_CHANGED;
            kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu);
        } else {
            hv->hv_tsc_page_status = HV_TSC_PAGE_UNSET;
        }
        break;
    case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
        return kvm_hv_msr_set_crash_data(kvm,
                         msr - HV_X64_MSR_CRASH_P0,
                         data);
    case HV_X64_MSR_CRASH_CTL:
        if (host)
            return kvm_hv_msr_set_crash_ctl(kvm, data);
 
        if (data & HV_CRASH_CTL_CRASH_NOTIFY) {
            vcpu_debug(vcpu, "hv crash (0x%llx 0x%llx 0x%llx 0x%llx 0x%llx)\n",
                   hv->hv_crash_param[0],
                   hv->hv_crash_param[1],
                   hv->hv_crash_param[2],
                   hv->hv_crash_param[3],
                   hv->hv_crash_param[4]);
 
            /* Send notification about crash to user space */
            kvm_make_request(KVM_REQ_HV_CRASH, vcpu);
        }
        break;
    case HV_X64_MSR_RESET:
        if (data == 1) {
            vcpu_debug(vcpu, "hyper-v reset requested\n");
            kvm_make_request(KVM_REQ_HV_RESET, vcpu);
        }
        break;
    case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
        hv->hv_reenlightenment_control = data;
        break;
    case HV_X64_MSR_TSC_EMULATION_CONTROL:
        hv->hv_tsc_emulation_control = data;
        break;
    case HV_X64_MSR_TSC_EMULATION_STATUS:
        if (data && !host)
            return 1;
 
        hv->hv_tsc_emulation_status = data;
        break;
    case HV_X64_MSR_TIME_REF_COUNT:
        /* read-only, but still ignore it if host-initiated */
        if (!host)
            return 1;
        break;
    case HV_X64_MSR_TSC_INVARIANT_CONTROL:
        /* Only bit 0 is supported */
        if (data & ~HV_EXPOSE_INVARIANT_TSC)
            return 1;
 
        /* The feature can't be disabled from the guest */
        if (!host && hv->hv_invtsc_control && !data)
            return 1;
 
        hv->hv_invtsc_control = data;
        break;
    case HV_X64_MSR_SYNDBG_OPTIONS:
    case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        return syndbg_set_msr(vcpu, msr, data, host);
    default:
        kvm_pr_unimpl_wrmsr(vcpu, msr, data);
        return 1;
    }
    return 0;
}

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kvm_hv_set_sint_gsi()

static int kvm_hv_set_sint_gsi ( struct kvm *  kvm, u32  vpidx, u32  sint, int  gsi  )

static

Definition at line 523 of file hyperv.c.

{
    struct kvm_vcpu_hv_synic *synic;
 
    synic = synic_get(kvm, vpidx);
    if (!synic)
        return -EINVAL;
 
    if (sint >= ARRAY_SIZE(synic->sint_to_gsi))
        return -EINVAL;
 
    atomic_set(&synic->sint_to_gsi[sint], gsi);
    return 0;
}

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kvm_hv_setup_tsc_page()

void kvm_hv_setup_tsc_page	(	struct kvm *	kvm,
		struct pvclock_vcpu_time_info *	hv_clock
	)

Definition at line 1158 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    u32 tsc_seq;
    u64 gfn;
 
    BUILD_BUG_ON(sizeof(tsc_seq) != sizeof(hv->tsc_ref.tsc_sequence));
    BUILD_BUG_ON(offsetof(struct ms_hyperv_tsc_page, tsc_sequence) != 0);
 
    mutex_lock(&hv->hv_lock);
 
    if (hv->hv_tsc_page_status == HV_TSC_PAGE_BROKEN ||
        hv->hv_tsc_page_status == HV_TSC_PAGE_SET ||
        hv->hv_tsc_page_status == HV_TSC_PAGE_UNSET)
        goto out_unlock;
 
    if (!(hv->hv_tsc_page & HV_X64_MSR_TSC_REFERENCE_ENABLE))
        goto out_unlock;
 
    gfn = hv->hv_tsc_page >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT;
    /*
     * Because the TSC parameters only vary when there is a
     * change in the master clock, do not bother with caching.
     */
    if (unlikely(kvm_read_guest(kvm, gfn_to_gpa(gfn),
                    &tsc_seq, sizeof(tsc_seq))))
        goto out_err;
 
    if (tsc_seq && tsc_page_update_unsafe(hv)) {
        if (kvm_read_guest(kvm, gfn_to_gpa(gfn), &hv->tsc_ref, sizeof(hv->tsc_ref)))
            goto out_err;
 
        hv->hv_tsc_page_status = HV_TSC_PAGE_SET;
        goto out_unlock;
    }
 
    /*
     * While we're computing and writing the parameters, force the
     * guest to use the time reference count MSR.
     */
    hv->tsc_ref.tsc_sequence = 0;
    if (kvm_write_guest(kvm, gfn_to_gpa(gfn),
                &hv->tsc_ref, sizeof(hv->tsc_ref.tsc_sequence)))
        goto out_err;
 
    if (!compute_tsc_page_parameters(hv_clock, &hv->tsc_ref))
        goto out_err;
 
    /* Ensure sequence is zero before writing the rest of the struct.  */
    smp_wmb();
    if (kvm_write_guest(kvm, gfn_to_gpa(gfn), &hv->tsc_ref, sizeof(hv->tsc_ref)))
        goto out_err;
 
    /*
     * Now switch to the TSC page mechanism by writing the sequence.
     */
    tsc_seq++;
    if (tsc_seq == 0xFFFFFFFF || tsc_seq == 0)
        tsc_seq = 1;
 
    /* Write the struct entirely before the non-zero sequence.  */
    smp_wmb();
 
    hv->tsc_ref.tsc_sequence = tsc_seq;
    if (kvm_write_guest(kvm, gfn_to_gpa(gfn),
                &hv->tsc_ref, sizeof(hv->tsc_ref.tsc_sequence)))
        goto out_err;
 
    hv->hv_tsc_page_status = HV_TSC_PAGE_SET;
    goto out_unlock;
 
out_err:
    hv->hv_tsc_page_status = HV_TSC_PAGE_BROKEN;
out_unlock:
    mutex_unlock(&hv->hv_lock);
}

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kvm_hv_syndbg_complete_userspace()

static int kvm_hv_syndbg_complete_userspace ( struct kvm_vcpu *  vcpu )

static

Definition at line 336 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
 
    if (vcpu->run->hyperv.u.syndbg.msr == HV_X64_MSR_SYNDBG_CONTROL)
        hv->hv_syndbg.control.status =
            vcpu->run->hyperv.u.syndbg.status;
    return 1;
}

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kvm_hv_synic_send_eoi()

void kvm_hv_synic_send_eoi	(	struct kvm_vcpu *	vcpu,
		int	vector
	)

Definition at line 511 of file hyperv.c.

{
    struct kvm_vcpu_hv_synic *synic = to_hv_synic(vcpu);
    int i;
 
    trace_kvm_hv_synic_send_eoi(vcpu->vcpu_id, vector);
 
    for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
        if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
            kvm_hv_notify_acked_sint(vcpu, i);
}

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kvm_hv_synic_set_irq()

int kvm_hv_synic_set_irq	(	struct kvm *	kvm,
		u32	vpidx,
		u32	sint
	)

Definition at line 500 of file hyperv.c.

{
    struct kvm_vcpu_hv_synic *synic;
 
    synic = synic_get(kvm, vpidx);
    if (!synic)
        return -EINVAL;
 
    return synic_set_irq(synic, sint);
}

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kvm_hv_vcpu_flush_tlb()

int kvm_hv_vcpu_flush_tlb

(

struct kvm_vcpu *

vcpu

)

Definition at line 1963 of file hyperv.c.

{
    struct kvm_vcpu_hv_tlb_flush_fifo *tlb_flush_fifo;
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    u64 entries[KVM_HV_TLB_FLUSH_FIFO_SIZE];
    int i, j, count;
    gva_t gva;
 
    if (!tdp_enabled || !hv_vcpu)
        return -EINVAL;
 
    tlb_flush_fifo = kvm_hv_get_tlb_flush_fifo(vcpu, is_guest_mode(vcpu));
 
    count = kfifo_out(&tlb_flush_fifo->entries, entries, KVM_HV_TLB_FLUSH_FIFO_SIZE);
 
    for (i = 0; i < count; i++) {
        if (entries[i] == KVM_HV_TLB_FLUSHALL_ENTRY)
            goto out_flush_all;
 
        /*
         * Lower 12 bits of 'address' encode the number of additional
         * pages to flush.
         */
        gva = entries[i] & PAGE_MASK;
        for (j = 0; j < (entries[i] & ~PAGE_MASK) + 1; j++)
            static_call(kvm_x86_flush_tlb_gva)(vcpu, gva + j * PAGE_SIZE);
 
        ++vcpu->stat.tlb_flush;
    }
    return 0;
 
out_flush_all:
    kfifo_reset_out(&tlb_flush_fifo->entries);
 
    /* Fall back to full flush. */
    return -ENOSPC;
}

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kvm_hv_vcpu_init()

int kvm_hv_vcpu_init

(

struct kvm_vcpu *

vcpu

)

Definition at line 960 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    int i;
 
    if (hv_vcpu)
        return 0;
 
    hv_vcpu = kzalloc(sizeof(struct kvm_vcpu_hv), GFP_KERNEL_ACCOUNT);
    if (!hv_vcpu)
        return -ENOMEM;
 
    vcpu->arch.hyperv = hv_vcpu;
    hv_vcpu->vcpu = vcpu;
 
    synic_init(&hv_vcpu->synic);
 
    bitmap_zero(hv_vcpu->stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT);
    for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
        stimer_init(&hv_vcpu->stimer[i], i);
 
    hv_vcpu->vp_index = vcpu->vcpu_idx;
 
    for (i = 0; i < HV_NR_TLB_FLUSH_FIFOS; i++) {
        INIT_KFIFO(hv_vcpu->tlb_flush_fifo[i].entries);
        spin_lock_init(&hv_vcpu->tlb_flush_fifo[i].write_lock);
    }
 
    return 0;
}

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kvm_hv_vcpu_uninit()

void kvm_hv_vcpu_uninit

(

struct kvm_vcpu *

vcpu

)

Definition at line 896 of file hyperv.c.

{
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    int i;
 
    if (!hv_vcpu)
        return;
 
    for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
        stimer_cleanup(&hv_vcpu->stimer[i]);
 
    kfree(hv_vcpu);
    vcpu->arch.hyperv = NULL;
}

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kvm_hv_xsaves_xsavec_maybe_warn()

void kvm_hv_xsaves_xsavec_maybe_warn

(

struct kvm_vcpu *

vcpu

)

Definition at line 1362 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
 
    if (!vcpu->arch.hyperv_enabled ||
        hv->xsaves_xsavec_checked)
        return;
 
    mutex_lock(&hv->hv_lock);
    __kvm_hv_xsaves_xsavec_maybe_warn(vcpu);
    mutex_unlock(&hv->hv_lock);
}

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kvm_hvcall_signal_event()

static u16 kvm_hvcall_signal_event ( struct kvm_vcpu *  vcpu, struct kvm_hv_hcall *  hc  )

static

Definition at line 2404 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
    struct eventfd_ctx *eventfd;
 
    if (unlikely(!hc->fast)) {
        int ret;
        gpa_t gpa = hc->ingpa;
 
        if ((gpa & (__alignof__(hc->ingpa) - 1)) ||
            offset_in_page(gpa) + sizeof(hc->ingpa) > PAGE_SIZE)
            return HV_STATUS_INVALID_ALIGNMENT;
 
        ret = kvm_vcpu_read_guest(vcpu, gpa,
                      &hc->ingpa, sizeof(hc->ingpa));
        if (ret < 0)
            return HV_STATUS_INVALID_ALIGNMENT;
    }
 
    /*
     * Per spec, bits 32-47 contain the extra "flag number".  However, we
     * have no use for it, and in all known usecases it is zero, so just
     * report lookup failure if it isn't.
     */
    if (hc->ingpa & 0xffff00000000ULL)
        return HV_STATUS_INVALID_PORT_ID;
    /* remaining bits are reserved-zero */
    if (hc->ingpa & ~KVM_HYPERV_CONN_ID_MASK)
        return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
    /* the eventfd is protected by vcpu->kvm->srcu, but conn_to_evt isn't */
    rcu_read_lock();
    eventfd = idr_find(&hv->conn_to_evt, hc->ingpa);
    rcu_read_unlock();
    if (!eventfd)
        return HV_STATUS_INVALID_PORT_ID;
 
    eventfd_signal(eventfd);
    return HV_STATUS_SUCCESS;
}

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kvm_vm_ioctl_hv_eventfd()

int kvm_vm_ioctl_hv_eventfd	(	struct kvm *	kvm,
		struct kvm_hyperv_eventfd *	args
	)

Definition at line 2749 of file hyperv.c.

{
    if ((args->flags & ~KVM_HYPERV_EVENTFD_DEASSIGN) ||
        (args->conn_id & ~KVM_HYPERV_CONN_ID_MASK))
        return -EINVAL;
 
    if (args->flags == KVM_HYPERV_EVENTFD_DEASSIGN)
        return kvm_hv_eventfd_deassign(kvm, args->conn_id);
    return kvm_hv_eventfd_assign(kvm, args->conn_id, args->fd);
}

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sparse_set_to_vcpu_mask()

static void sparse_set_to_vcpu_mask ( struct kvm *  kvm, u64 *  sparse_banks, u64  valid_bank_mask, unsigned long *  vcpu_mask  )

static

Definition at line 1792 of file hyperv.c.

{
    struct kvm_hv *hv = to_kvm_hv(kvm);
    bool has_mismatch = atomic_read(&hv->num_mismatched_vp_indexes);
    u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];
    struct kvm_vcpu *vcpu;
    int bank, sbank = 0;
    unsigned long i;
    u64 *bitmap;
 
    BUILD_BUG_ON(sizeof(vp_bitmap) >
             sizeof(*vcpu_mask) * BITS_TO_LONGS(KVM_MAX_VCPUS));
 
    /*
     * If vp_index == vcpu_idx for all vCPUs, fill vcpu_mask directly, else
     * fill a temporary buffer and manually test each vCPU's VP index.
     */
    if (likely(!has_mismatch))
        bitmap = (u64 *)vcpu_mask;
    else
        bitmap = vp_bitmap;
 
    /*
     * Each set of 64 VPs is packed into sparse_banks, with valid_bank_mask
     * having a '1' for each bank that exists in sparse_banks.  Sets must
     * be in ascending order, i.e. bank0..bankN.
     */
    memset(bitmap, 0, sizeof(vp_bitmap));
    for_each_set_bit(bank, (unsigned long *)&valid_bank_mask,
             KVM_HV_MAX_SPARSE_VCPU_SET_BITS)
        bitmap[bank] = sparse_banks[sbank++];
 
    if (likely(!has_mismatch))
        return;
 
    bitmap_zero(vcpu_mask, KVM_MAX_VCPUS);
    kvm_for_each_vcpu(i, vcpu, kvm) {
        if (test_bit(kvm_hv_get_vpindex(vcpu), (unsigned long *)vp_bitmap))
            __set_bit(i, vcpu_mask);
    }
}

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stimer_cleanup()

static void stimer_cleanup ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 599 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
 
    trace_kvm_hv_stimer_cleanup(hv_stimer_to_vcpu(stimer)->vcpu_id,
                    stimer->index);
 
    hrtimer_cancel(&stimer->timer);
    clear_bit(stimer->index,
          to_hv_vcpu(vcpu)->stimer_pending_bitmap);
    stimer->msg_pending = false;
    stimer->exp_time = 0;
}

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stimer_expiration()

static void stimer_expiration ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 845 of file hyperv.c.

{
    int r, direct = stimer->config.direct_mode;
 
    stimer->msg_pending = true;
    if (!direct)
        r = stimer_send_msg(stimer);
    else
        r = stimer_notify_direct(stimer);
    trace_kvm_hv_stimer_expiration(hv_stimer_to_vcpu(stimer)->vcpu_id,
                       stimer->index, direct, r);
    if (!r) {
        stimer->msg_pending = false;
        if (!(stimer->config.periodic))
            stimer->config.enable = 0;
    }
}

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stimer_get_config()

static int stimer_get_config ( struct kvm_vcpu_hv_stimer *  stimer, u64 *  pconfig  )

static

Definition at line 743 of file hyperv.c.

{
    *pconfig = stimer->config.as_uint64;
    return 0;
}

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stimer_get_count()

static int stimer_get_count ( struct kvm_vcpu_hv_stimer *  stimer, u64 *  pcount  )

static

Definition at line 749 of file hyperv.c.

{
    *pcount = stimer->count;
    return 0;
}

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stimer_init()

static void stimer_init ( struct kvm_vcpu_hv_stimer *  stimer, int  timer_index  )

static

Definition at line 951 of file hyperv.c.

{
    memset(stimer, 0, sizeof(*stimer));
    stimer->index = timer_index;
    hrtimer_init(&stimer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
    stimer->timer.function = stimer_timer_callback;
    stimer_prepare_msg(stimer);
}

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stimer_mark_pending()

static void stimer_mark_pending ( struct kvm_vcpu_hv_stimer *  stimer, bool  vcpu_kick  )

static

Definition at line 587 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
 
    set_bit(stimer->index,
        to_hv_vcpu(vcpu)->stimer_pending_bitmap);
    kvm_make_request(KVM_REQ_HV_STIMER, vcpu);
    if (vcpu_kick)
        kvm_vcpu_kick(vcpu);
}

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stimer_notify_direct()

static int stimer_notify_direct ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 832 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
    struct kvm_lapic_irq irq = {
        .delivery_mode = APIC_DM_FIXED,
        .vector = stimer->config.apic_vector
    };
 
    if (lapic_in_kernel(vcpu))
        return !kvm_apic_set_irq(vcpu, &irq, NULL);
    return 0;
}

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stimer_prepare_msg()

static void stimer_prepare_msg ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 936 of file hyperv.c.

{
    struct hv_message *msg = &stimer->msg;
    struct hv_timer_message_payload *payload =
            (struct hv_timer_message_payload *)&msg->u.payload;
 
    memset(&msg->header, 0, sizeof(msg->header));
    msg->header.message_type = HVMSG_TIMER_EXPIRED;
    msg->header.payload_size = sizeof(*payload);
 
    payload->timer_index = stimer->index;
    payload->expiration_time = 0;
    payload->delivery_time = 0;
}

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stimer_send_msg()

static int stimer_send_msg ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 812 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
    struct hv_message *msg = &stimer->msg;
    struct hv_timer_message_payload *payload =
            (struct hv_timer_message_payload *)&msg->u.payload;
 
    /*
     * To avoid piling up periodic ticks, don't retry message
     * delivery for them (within "lazy" lost ticks policy).
     */
    bool no_retry = stimer->config.periodic;
 
    payload->expiration_time = stimer->exp_time;
    payload->delivery_time = get_time_ref_counter(vcpu->kvm);
    return synic_deliver_msg(to_hv_synic(vcpu),
                 stimer->config.sintx, msg,
                 no_retry);
}

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stimer_set_config()

static int stimer_set_config ( struct kvm_vcpu_hv_stimer *  stimer, u64  config, bool  host  )

static

Definition at line 684 of file hyperv.c.

{
    union hv_stimer_config new_config = {.as_uint64 = config},
        old_config = {.as_uint64 = stimer->config.as_uint64};
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
    struct kvm_vcpu_hv_synic *synic = to_hv_synic(vcpu);
 
    if (!synic->active && (!host || config))
        return 1;
 
    if (unlikely(!host && hv_vcpu->enforce_cpuid && new_config.direct_mode &&
             !(hv_vcpu->cpuid_cache.features_edx &
               HV_STIMER_DIRECT_MODE_AVAILABLE)))
        return 1;
 
    trace_kvm_hv_stimer_set_config(hv_stimer_to_vcpu(stimer)->vcpu_id,
                       stimer->index, config, host);
 
    stimer_cleanup(stimer);
    if (old_config.enable &&
        !new_config.direct_mode && new_config.sintx == 0)
        new_config.enable = 0;
    stimer->config.as_uint64 = new_config.as_uint64;
 
    if (stimer->config.enable)
        stimer_mark_pending(stimer, false);
 
    return 0;
}

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stimer_set_count()

static int stimer_set_count ( struct kvm_vcpu_hv_stimer *  stimer, u64  count, bool  host  )

static

Definition at line 716 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
    struct kvm_vcpu_hv_synic *synic = to_hv_synic(vcpu);
 
    if (!synic->active && (!host || count))
        return 1;
 
    trace_kvm_hv_stimer_set_count(hv_stimer_to_vcpu(stimer)->vcpu_id,
                      stimer->index, count, host);
 
    stimer_cleanup(stimer);
    stimer->count = count;
    if (!host) {
        if (stimer->count == 0)
            stimer->config.enable = 0;
        else if (stimer->config.auto_enable)
            stimer->config.enable = 1;
    }
 
    if (stimer->config.enable)
        stimer_mark_pending(stimer, false);
 
    return 0;
}

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stimer_start()

static int stimer_start ( struct kvm_vcpu_hv_stimer *  stimer )

static

Definition at line 630 of file hyperv.c.

{
    u64 time_now;
    ktime_t ktime_now;
 
    time_now = get_time_ref_counter(hv_stimer_to_vcpu(stimer)->kvm);
    ktime_now = ktime_get();
 
    if (stimer->config.periodic) {
        if (stimer->exp_time) {
            if (time_now >= stimer->exp_time) {
                u64 remainder;
 
                div64_u64_rem(time_now - stimer->exp_time,
                          stimer->count, &remainder);
                stimer->exp_time =
                    time_now + (stimer->count - remainder);
            }
        } else
            stimer->exp_time = time_now + stimer->count;
 
        trace_kvm_hv_stimer_start_periodic(
                    hv_stimer_to_vcpu(stimer)->vcpu_id,
                    stimer->index,
                    time_now, stimer->exp_time);
 
        hrtimer_start(&stimer->timer,
                  ktime_add_ns(ktime_now,
                       100 * (stimer->exp_time - time_now)),
                  HRTIMER_MODE_ABS);
        return 0;
    }
    stimer->exp_time = stimer->count;
    if (time_now >= stimer->count) {
        /*
         * Expire timer according to Hypervisor Top-Level Functional
         * specification v4(15.3.1):
         * "If a one shot is enabled and the specified count is in
         * the past, it will expire immediately."
         */
        stimer_mark_pending(stimer, false);
        return 0;
    }
 
    trace_kvm_hv_stimer_start_one_shot(hv_stimer_to_vcpu(stimer)->vcpu_id,
                       stimer->index,
                       time_now, stimer->count);
 
    hrtimer_start(&stimer->timer,
              ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
              HRTIMER_MODE_ABS);
    return 0;
}

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stimer_timer_callback()

static enum hrtimer_restart stimer_timer_callback ( struct hrtimer *  timer )

static

Definition at line 599 of file hyperv.c.

{
    struct kvm_vcpu_hv_stimer *stimer;
 
    stimer = container_of(timer, struct kvm_vcpu_hv_stimer, timer);
    trace_kvm_hv_stimer_callback(hv_stimer_to_vcpu(stimer)->vcpu_id,
                     stimer->index);
    stimer_mark_pending(stimer, true);
 
    return HRTIMER_NORESTART;
}

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syndbg_exit()

static void syndbg_exit ( struct kvm_vcpu *  vcpu, u32  msr  )

static

Definition at line 346 of file hyperv.c.

{
    struct kvm_hv_syndbg *syndbg = to_hv_syndbg(vcpu);
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNDBG;
    hv_vcpu->exit.u.syndbg.msr = msr;
    hv_vcpu->exit.u.syndbg.control = syndbg->control.control;
    hv_vcpu->exit.u.syndbg.send_page = syndbg->control.send_page;
    hv_vcpu->exit.u.syndbg.recv_page = syndbg->control.recv_page;
    hv_vcpu->exit.u.syndbg.pending_page = syndbg->control.pending_page;
    vcpu->arch.complete_userspace_io =
            kvm_hv_syndbg_complete_userspace;
 
    kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
}

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syndbg_get_msr()

static int syndbg_get_msr ( struct kvm_vcpu *  vcpu, u32  msr, u64 *  pdata, bool  host  )

static

Definition at line 402 of file hyperv.c.

{
    struct kvm_hv_syndbg *syndbg = to_hv_syndbg(vcpu);
 
    if (!kvm_hv_is_syndbg_enabled(vcpu) && !host)
        return 1;
 
    switch (msr) {
    case HV_X64_MSR_SYNDBG_CONTROL:
        *pdata = syndbg->control.control;
        break;
    case HV_X64_MSR_SYNDBG_STATUS:
        *pdata = syndbg->control.status;
        break;
    case HV_X64_MSR_SYNDBG_SEND_BUFFER:
        *pdata = syndbg->control.send_page;
        break;
    case HV_X64_MSR_SYNDBG_RECV_BUFFER:
        *pdata = syndbg->control.recv_page;
        break;
    case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        *pdata = syndbg->control.pending_page;
        break;
    case HV_X64_MSR_SYNDBG_OPTIONS:
        *pdata = syndbg->options;
        break;
    default:
        break;
    }
 
    trace_kvm_hv_syndbg_get_msr(vcpu->vcpu_id, kvm_hv_get_vpindex(vcpu), msr, *pdata);
 
    return 0;
}

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syndbg_set_msr()

static int syndbg_set_msr ( struct kvm_vcpu *  vcpu, u32  msr, u64  data, bool  host  )

static

Definition at line 363 of file hyperv.c.

{
    struct kvm_hv_syndbg *syndbg = to_hv_syndbg(vcpu);
 
    if (!kvm_hv_is_syndbg_enabled(vcpu) && !host)
        return 1;
 
    trace_kvm_hv_syndbg_set_msr(vcpu->vcpu_id,
                    to_hv_vcpu(vcpu)->vp_index, msr, data);
    switch (msr) {
    case HV_X64_MSR_SYNDBG_CONTROL:
        syndbg->control.control = data;
        if (!host)
            syndbg_exit(vcpu, msr);
        break;
    case HV_X64_MSR_SYNDBG_STATUS:
        syndbg->control.status = data;
        break;
    case HV_X64_MSR_SYNDBG_SEND_BUFFER:
        syndbg->control.send_page = data;
        break;
    case HV_X64_MSR_SYNDBG_RECV_BUFFER:
        syndbg->control.recv_page = data;
        break;
    case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
        syndbg->control.pending_page = data;
        if (!host)
            syndbg_exit(vcpu, msr);
        break;
    case HV_X64_MSR_SYNDBG_OPTIONS:
        syndbg->options = data;
        break;
    default:
        break;
    }
 
    return 0;
}

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synic_deliver_msg()

static int synic_deliver_msg ( struct kvm_vcpu_hv_synic *  synic, u32  sint, struct hv_message *  src_msg, bool  no_retry  )

static

Definition at line 755 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
    int msg_off = offsetof(struct hv_message_page, sint_message[sint]);
    gfn_t msg_page_gfn;
    struct hv_message_header hv_hdr;
    int r;
 
    if (!(synic->msg_page & HV_SYNIC_SIMP_ENABLE))
        return -ENOENT;
 
    msg_page_gfn = synic->msg_page >> PAGE_SHIFT;
 
    /*
     * Strictly following the spec-mandated ordering would assume setting
     * .msg_pending before checking .message_type.  However, this function
     * is only called in vcpu context so the entire update is atomic from
     * guest POV and thus the exact order here doesn't matter.
     */
    r = kvm_vcpu_read_guest_page(vcpu, msg_page_gfn, &hv_hdr.message_type,
                     msg_off + offsetof(struct hv_message,
                            header.message_type),
                     sizeof(hv_hdr.message_type));
    if (r < 0)
        return r;
 
    if (hv_hdr.message_type != HVMSG_NONE) {
        if (no_retry)
            return 0;
 
        hv_hdr.message_flags.msg_pending = 1;
        r = kvm_vcpu_write_guest_page(vcpu, msg_page_gfn,
                          &hv_hdr.message_flags,
                          msg_off +
                          offsetof(struct hv_message,
                               header.message_flags),
                          sizeof(hv_hdr.message_flags));
        if (r < 0)
            return r;
        return -EAGAIN;
    }
 
    r = kvm_vcpu_write_guest_page(vcpu, msg_page_gfn, src_msg, msg_off,
                      sizeof(src_msg->header) +
                      src_msg->header.payload_size);
    if (r < 0)
        return r;
 
    r = synic_set_irq(synic, sint);
    if (r < 0)
        return r;
    if (r == 0)
        return -EFAULT;
    return 0;
}

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synic_exit()

static void synic_exit ( struct kvm_vcpu_hv_synic *  synic, u32  msr  )

static

Definition at line 245 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
    struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
    hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNIC;
    hv_vcpu->exit.u.synic.msr = msr;
    hv_vcpu->exit.u.synic.control = synic->control;
    hv_vcpu->exit.u.synic.evt_page = synic->evt_page;
    hv_vcpu->exit.u.synic.msg_page = synic->msg_page;
 
    kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
}

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synic_get()

static struct kvm_vcpu_hv_synic* synic_get ( struct kvm *  kvm, u32  vpidx  )

static

Definition at line 207 of file hyperv.c.

{
    struct kvm_vcpu *vcpu;
    struct kvm_vcpu_hv_synic *synic;
 
    vcpu = get_vcpu_by_vpidx(kvm, vpidx);
    if (!vcpu || !to_hv_vcpu(vcpu))
        return NULL;
    synic = to_hv_synic(vcpu);
    return (synic->active) ? synic : NULL;
}

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synic_get_msr()

static int synic_get_msr ( struct kvm_vcpu_hv_synic *  synic, u32  msr, u64 *  pdata, bool  host  )

static

Definition at line 437 of file hyperv.c.

{
    int ret;
 
    if (!synic->active && !host)
        return 1;
 
    ret = 0;
    switch (msr) {
    case HV_X64_MSR_SCONTROL:
        *pdata = synic->control;
        break;
    case HV_X64_MSR_SVERSION:
        *pdata = synic->version;
        break;
    case HV_X64_MSR_SIEFP:
        *pdata = synic->evt_page;
        break;
    case HV_X64_MSR_SIMP:
        *pdata = synic->msg_page;
        break;
    case HV_X64_MSR_EOM:
        *pdata = 0;
        break;
    case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
        *pdata = atomic64_read(&synic->sint[msr - HV_X64_MSR_SINT0]);
        break;
    default:
        ret = 1;
        break;
    }
    return ret;
}

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synic_get_sint_vector()

static int synic_get_sint_vector ( u64  sint_value )

inlinestatic

Definition at line 73 of file hyperv.c.

{
    if (sint_value & HV_SYNIC_SINT_MASKED)
        return -1;
    return sint_value & HV_SYNIC_SINT_VECTOR_MASK;
}

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synic_has_vector_auto_eoi()

static bool synic_has_vector_auto_eoi ( struct kvm_vcpu_hv_synic *  synic, int  vector  )

static

Definition at line 92 of file hyperv.c.

{
    int i;
    u64 sint_value;
 
    for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
        sint_value = synic_read_sint(synic, i);
        if (synic_get_sint_vector(sint_value) == vector &&
            sint_value & HV_SYNIC_SINT_AUTO_EOI)
            return true;
    }
    return false;
}

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synic_has_vector_connected()

static bool synic_has_vector_connected ( struct kvm_vcpu_hv_synic *  synic, int  vector  )

static

Definition at line 80 of file hyperv.c.

{
    int i;
 
    for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
        if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
            return true;
    }
    return false;
}

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synic_init()

static void synic_init ( struct kvm_vcpu_hv_synic *  synic )

static

Definition at line 556 of file hyperv.c.

{
    int i;
 
    memset(synic, 0, sizeof(*synic));
    synic->version = HV_SYNIC_VERSION_1;
    for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
        atomic64_set(&synic->sint[i], HV_SYNIC_SINT_MASKED);
        atomic_set(&synic->sint_to_gsi[i], -1);
    }
}

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synic_read_sint()

static u64 synic_read_sint ( struct kvm_vcpu_hv_synic *  synic, int  sint  )

inlinestatic

Definition at line 68 of file hyperv.c.

{
    return atomic64_read(&synic->sint[sint]);
}

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synic_set_irq()

static int synic_set_irq ( struct kvm_vcpu_hv_synic *  synic, u32  sint  )

static

Definition at line 472 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
    struct kvm_lapic_irq irq;
    int ret, vector;
 
    if (KVM_BUG_ON(!lapic_in_kernel(vcpu), vcpu->kvm))
        return -EINVAL;
 
    if (sint >= ARRAY_SIZE(synic->sint))
        return -EINVAL;
 
    vector = synic_get_sint_vector(synic_read_sint(synic, sint));
    if (vector < 0)
        return -ENOENT;
 
    memset(&irq, 0, sizeof(irq));
    irq.shorthand = APIC_DEST_SELF;
    irq.dest_mode = APIC_DEST_PHYSICAL;
    irq.delivery_mode = APIC_DM_FIXED;
    irq.vector = vector;
    irq.level = 1;
 
    ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq, NULL);
    trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
    return ret;
}

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synic_set_msr()

static int synic_set_msr ( struct kvm_vcpu_hv_synic *  synic, u32  msr, u64  data, bool  host  )

static

Definition at line 259 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
    int ret;
 
    if (!synic->active && (!host || data))
        return 1;
 
    trace_kvm_hv_synic_set_msr(vcpu->vcpu_id, msr, data, host);
 
    ret = 0;
    switch (msr) {
    case HV_X64_MSR_SCONTROL:
        synic->control = data;
        if (!host)
            synic_exit(synic, msr);
        break;
    case HV_X64_MSR_SVERSION:
        if (!host) {
            ret = 1;
            break;
        }
        synic->version = data;
        break;
    case HV_X64_MSR_SIEFP:
        if ((data & HV_SYNIC_SIEFP_ENABLE) && !host &&
            !synic->dont_zero_synic_pages)
            if (kvm_clear_guest(vcpu->kvm,
                        data & PAGE_MASK, PAGE_SIZE)) {
                ret = 1;
                break;
            }
        synic->evt_page = data;
        if (!host)
            synic_exit(synic, msr);
        break;
    case HV_X64_MSR_SIMP:
        if ((data & HV_SYNIC_SIMP_ENABLE) && !host &&
            !synic->dont_zero_synic_pages)
            if (kvm_clear_guest(vcpu->kvm,
                        data & PAGE_MASK, PAGE_SIZE)) {
                ret = 1;
                break;
            }
        synic->msg_page = data;
        if (!host)
            synic_exit(synic, msr);
        break;
    case HV_X64_MSR_EOM: {
        int i;
 
        if (!synic->active)
            break;
 
        for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
            kvm_hv_notify_acked_sint(vcpu, i);
        break;
    }
    case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
        ret = synic_set_sint(synic, msr - HV_X64_MSR_SINT0, data, host);
        break;
    default:
        ret = 1;
        break;
    }
    return ret;
}

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synic_set_sint()

static int synic_set_sint ( struct kvm_vcpu_hv_synic *  synic, int  sint, u64  data, bool  host  )

static

Definition at line 155 of file hyperv.c.

{
    int vector, old_vector;
    bool masked;
 
    vector = data & HV_SYNIC_SINT_VECTOR_MASK;
    masked = data & HV_SYNIC_SINT_MASKED;
 
    /*
     * Valid vectors are 16-255, however, nested Hyper-V attempts to write
     * default '0x10000' value on boot and this should not #GP. We need to
     * allow zero-initing the register from host as well.
     */
    if (vector < HV_SYNIC_FIRST_VALID_VECTOR && !host && !masked)
        return 1;
    /*
     * Guest may configure multiple SINTs to use the same vector, so
     * we maintain a bitmap of vectors handled by synic, and a
     * bitmap of vectors with auto-eoi behavior.  The bitmaps are
     * updated here, and atomically queried on fast paths.
     */
    old_vector = synic_read_sint(synic, sint) & HV_SYNIC_SINT_VECTOR_MASK;
 
    atomic64_set(&synic->sint[sint], data);
 
    synic_update_vector(synic, old_vector);
 
    synic_update_vector(synic, vector);
 
    /* Load SynIC vectors into EOI exit bitmap */
    kvm_make_request(KVM_REQ_SCAN_IOAPIC, hv_synic_to_vcpu(synic));
    return 0;
}

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synic_update_vector()

static void synic_update_vector ( struct kvm_vcpu_hv_synic *  synic, int  vector  )

static

Definition at line 107 of file hyperv.c.

{
    struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
    struct kvm_hv *hv = to_kvm_hv(vcpu->kvm);
    bool auto_eoi_old, auto_eoi_new;
 
    if (vector < HV_SYNIC_FIRST_VALID_VECTOR)
        return;
 
    if (synic_has_vector_connected(synic, vector))
        __set_bit(vector, synic->vec_bitmap);
    else
        __clear_bit(vector, synic->vec_bitmap);
 
    auto_eoi_old = !bitmap_empty(synic->auto_eoi_bitmap, 256);
 
    if (synic_has_vector_auto_eoi(synic, vector))
        __set_bit(vector, synic->auto_eoi_bitmap);
    else
        __clear_bit(vector, synic->auto_eoi_bitmap);
 
    auto_eoi_new = !bitmap_empty(synic->auto_eoi_bitmap, 256);
 
    if (auto_eoi_old == auto_eoi_new)
        return;
 
    if (!enable_apicv)
        return;
 
    down_write(&vcpu->kvm->arch.apicv_update_lock);
 
    if (auto_eoi_new)
        hv->synic_auto_eoi_used++;
    else
        hv->synic_auto_eoi_used--;
 
    /*
     * Inhibit APICv if any vCPU is using SynIC's AutoEOI, which relies on
     * the hypervisor to manually inject IRQs.
     */
    __kvm_set_or_clear_apicv_inhibit(vcpu->kvm,
                     APICV_INHIBIT_REASON_HYPERV,
                     !!hv->synic_auto_eoi_used);
 
    up_write(&vcpu->kvm->arch.apicv_update_lock);
}

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tsc_page_update_unsafe()

static bool tsc_page_update_unsafe ( struct kvm_hv *  hv )

inlinestatic

Definition at line 1152 of file hyperv.c.

{
    return (hv->hv_tsc_page_status != HV_TSC_PAGE_GUEST_CHANGED) &&
        hv->hv_tsc_emulation_control;
}

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