hyp-main.c File Reference

#include <hyp/adjust_pc.h>
#include <asm/pgtable-types.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_host.h>
#include <asm/kvm_hyp.h>
#include <asm/kvm_mmu.h>
#include <nvhe/ffa.h>
#include <nvhe/mem_protect.h>
#include <nvhe/mm.h>
#include <nvhe/pkvm.h>
#include <nvhe/trap_handler.h>

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Macros
#define	HANDLE_FUNC(x)   [__KVM_HOST_SMCCC_FUNC_##x] = (hcall_t)handle_##x

Typedefs
typedef void(*	hcall_t) (struct kvm_cpu_context *)

Functions
	DEFINE_PER_CPU (struct kvm_nvhe_init_params, kvm_init_params)
void	__kvm_hyp_host_forward_smc (struct kvm_cpu_context *host_ctxt)
static void	flush_hyp_vcpu (struct pkvm_hyp_vcpu *hyp_vcpu)
static void	sync_hyp_vcpu (struct pkvm_hyp_vcpu *hyp_vcpu)
static void	handle___kvm_vcpu_run (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_adjust_pc (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_flush_vm_context (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_tlb_flush_vmid_ipa (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_tlb_flush_vmid_ipa_nsh (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_tlb_flush_vmid_range (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_tlb_flush_vmid (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_flush_cpu_context (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_timer_set_cntvoff (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_enable_ssbs (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_get_gic_config (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_read_vmcr (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_write_vmcr (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_init_lrs (struct kvm_cpu_context *host_ctxt)
static void	handle___kvm_get_mdcr_el2 (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_save_aprs (struct kvm_cpu_context *host_ctxt)
static void	handle___vgic_v3_restore_aprs (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_init (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_cpu_set_vector (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_host_share_hyp (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_host_unshare_hyp (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_create_private_mapping (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_prot_finalize (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_vcpu_init_traps (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_init_vm (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_init_vcpu (struct kvm_cpu_context *host_ctxt)
static void	handle___pkvm_teardown_vm (struct kvm_cpu_context *host_ctxt)
static void	handle_host_hcall (struct kvm_cpu_context *host_ctxt)
static void	default_host_smc_handler (struct kvm_cpu_context *host_ctxt)
static void	handle_host_smc (struct kvm_cpu_context *host_ctxt)
void	handle_trap (struct kvm_cpu_context *host_ctxt)

Variables
static const hcall_t	host_hcall []

Macro Definition Documentation

HANDLE_FUNC

#define HANDLE_FUNC

(

x

)

[__KVM_HOST_SMCCC_FUNC_##x] = (hcall_t)handle_##x

Definition at line 319 of file hyp-main.c.

Typedef Documentation

hcall_t

typedef void(* hcall_t) (struct kvm_cpu_context *)

Definition at line 317 of file hyp-main.c.

Function Documentation

__kvm_hyp_host_forward_smc()

void __kvm_hyp_host_forward_smc

(

struct kvm_cpu_context *

host_ctxt

)

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default_host_smc_handler()

static void default_host_smc_handler ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 389 of file hyp-main.c.

{
    __kvm_hyp_host_forward_smc(host_ctxt);
}

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DEFINE_PER_CPU()

DEFINE_PER_CPU	(	struct kvm_nvhe_init_params	,
		kvm_init_params
	)

flush_hyp_vcpu()

static void flush_hyp_vcpu ( struct pkvm_hyp_vcpu *  hyp_vcpu )

static

Definition at line 26 of file hyp-main.c.

{
    struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu;
 
    hyp_vcpu->vcpu.arch.ctxt    = host_vcpu->arch.ctxt;
 
    hyp_vcpu->vcpu.arch.sve_state   = kern_hyp_va(host_vcpu->arch.sve_state);
    hyp_vcpu->vcpu.arch.sve_max_vl  = host_vcpu->arch.sve_max_vl;
 
    hyp_vcpu->vcpu.arch.hw_mmu  = host_vcpu->arch.hw_mmu;
 
    hyp_vcpu->vcpu.arch.hcr_el2 = host_vcpu->arch.hcr_el2;
    hyp_vcpu->vcpu.arch.mdcr_el2    = host_vcpu->arch.mdcr_el2;
    hyp_vcpu->vcpu.arch.cptr_el2    = host_vcpu->arch.cptr_el2;
 
    hyp_vcpu->vcpu.arch.iflags  = host_vcpu->arch.iflags;
    hyp_vcpu->vcpu.arch.fp_state    = host_vcpu->arch.fp_state;
 
    hyp_vcpu->vcpu.arch.debug_ptr   = kern_hyp_va(host_vcpu->arch.debug_ptr);
    hyp_vcpu->vcpu.arch.host_fpsimd_state = host_vcpu->arch.host_fpsimd_state;
 
    hyp_vcpu->vcpu.arch.vsesr_el2   = host_vcpu->arch.vsesr_el2;
 
    hyp_vcpu->vcpu.arch.vgic_cpu.vgic_v3 = host_vcpu->arch.vgic_cpu.vgic_v3;
}

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handle___kvm_adjust_pc()

static void handle___kvm_adjust_pc ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 108 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_vcpu *, vcpu, host_ctxt, 1);
 
    __kvm_adjust_pc(kern_hyp_va(vcpu));
}

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handle___kvm_enable_ssbs()

static void handle___kvm_enable_ssbs ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 167 of file hyp-main.c.

{
    u64 tmp;
 
    tmp = read_sysreg_el2(SYS_SCTLR);
    tmp |= SCTLR_ELx_DSSBS;
    write_sysreg_el2(tmp, SYS_SCTLR);
}

handle___kvm_flush_cpu_context()

static void handle___kvm_flush_cpu_context ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 155 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
 
    __kvm_flush_cpu_context(kern_hyp_va(mmu));
}

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handle___kvm_flush_vm_context()

static void handle___kvm_flush_vm_context ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 115 of file hyp-main.c.

{
    __kvm_flush_vm_context();
}

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handle___kvm_get_mdcr_el2()

static void handle___kvm_get_mdcr_el2 ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 196 of file hyp-main.c.

{
    cpu_reg(host_ctxt, 1) = __kvm_get_mdcr_el2();
}

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handle___kvm_timer_set_cntvoff()

static void handle___kvm_timer_set_cntvoff ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 162 of file hyp-main.c.

{
    __kvm_timer_set_cntvoff(cpu_reg(host_ctxt, 1));
}

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handle___kvm_tlb_flush_vmid()

static void handle___kvm_tlb_flush_vmid ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 148 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
 
    __kvm_tlb_flush_vmid(kern_hyp_va(mmu));
}

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handle___kvm_tlb_flush_vmid_ipa()

static void handle___kvm_tlb_flush_vmid_ipa ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 120 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
    DECLARE_REG(phys_addr_t, ipa, host_ctxt, 2);
    DECLARE_REG(int, level, host_ctxt, 3);
 
    __kvm_tlb_flush_vmid_ipa(kern_hyp_va(mmu), ipa, level);
}

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handle___kvm_tlb_flush_vmid_ipa_nsh()

static void handle___kvm_tlb_flush_vmid_ipa_nsh ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 129 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
    DECLARE_REG(phys_addr_t, ipa, host_ctxt, 2);
    DECLARE_REG(int, level, host_ctxt, 3);
 
    __kvm_tlb_flush_vmid_ipa_nsh(kern_hyp_va(mmu), ipa, level);
}

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handle___kvm_tlb_flush_vmid_range()

static void handle___kvm_tlb_flush_vmid_range ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 139 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
    DECLARE_REG(phys_addr_t, start, host_ctxt, 2);
    DECLARE_REG(unsigned long, pages, host_ctxt, 3);
 
    __kvm_tlb_flush_vmid_range(kern_hyp_va(mmu), start, pages);
}

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handle___kvm_vcpu_run()

static void handle___kvm_vcpu_run ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 74 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_vcpu *, host_vcpu, host_ctxt, 1);
    int ret;
 
    host_vcpu = kern_hyp_va(host_vcpu);
 
    if (unlikely(is_protected_kvm_enabled())) {
        struct pkvm_hyp_vcpu *hyp_vcpu;
        struct kvm *host_kvm;
 
        host_kvm = kern_hyp_va(host_vcpu->kvm);
        hyp_vcpu = pkvm_load_hyp_vcpu(host_kvm->arch.pkvm.handle,
                          host_vcpu->vcpu_idx);
        if (!hyp_vcpu) {
            ret = -EINVAL;
            goto out;
        }
 
        flush_hyp_vcpu(hyp_vcpu);
 
        ret = __kvm_vcpu_run(&hyp_vcpu->vcpu);
 
        sync_hyp_vcpu(hyp_vcpu);
        pkvm_put_hyp_vcpu(hyp_vcpu);
    } else {
        /* The host is fully trusted, run its vCPU directly. */
        ret = __kvm_vcpu_run(host_vcpu);
    }
 
out:
    cpu_reg(host_ctxt, 1) =  ret;
}

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handle___pkvm_cpu_set_vector()

static void handle___pkvm_cpu_set_vector ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 232 of file hyp-main.c.

{
    DECLARE_REG(enum arm64_hyp_spectre_vector, slot, host_ctxt, 1);
 
    cpu_reg(host_ctxt, 1) = pkvm_cpu_set_vector(slot);
}

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handle___pkvm_create_private_mapping()

static void handle___pkvm_create_private_mapping ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 253 of file hyp-main.c.

{
    DECLARE_REG(phys_addr_t, phys, host_ctxt, 1);
    DECLARE_REG(size_t, size, host_ctxt, 2);
    DECLARE_REG(enum kvm_pgtable_prot, prot, host_ctxt, 3);
 
    /*
     * __pkvm_create_private_mapping() populates a pointer with the
     * hypervisor start address of the allocation.
     *
     * However, handle___pkvm_create_private_mapping() hypercall crosses the
     * EL1/EL2 boundary so the pointer would not be valid in this context.
     *
     * Instead pass the allocation address as the return value (or return
     * ERR_PTR() on failure).
     */
    unsigned long haddr;
    int err = __pkvm_create_private_mapping(phys, size, prot, &haddr);
 
    if (err)
        haddr = (unsigned long)ERR_PTR(err);
 
    cpu_reg(host_ctxt, 1) = haddr;
}

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handle___pkvm_host_share_hyp()

static void handle___pkvm_host_share_hyp ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 239 of file hyp-main.c.

{
    DECLARE_REG(u64, pfn, host_ctxt, 1);
 
    cpu_reg(host_ctxt, 1) = __pkvm_host_share_hyp(pfn);
}

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handle___pkvm_host_unshare_hyp()

static void handle___pkvm_host_unshare_hyp ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 246 of file hyp-main.c.

{
    DECLARE_REG(u64, pfn, host_ctxt, 1);
 
    cpu_reg(host_ctxt, 1) = __pkvm_host_unshare_hyp(pfn);
}

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handle___pkvm_init()

static void handle___pkvm_init ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 215 of file hyp-main.c.

{
    DECLARE_REG(phys_addr_t, phys, host_ctxt, 1);
    DECLARE_REG(unsigned long, size, host_ctxt, 2);
    DECLARE_REG(unsigned long, nr_cpus, host_ctxt, 3);
    DECLARE_REG(unsigned long *, per_cpu_base, host_ctxt, 4);
    DECLARE_REG(u32, hyp_va_bits, host_ctxt, 5);
 
    /*
     * __pkvm_init() will return only if an error occurred, otherwise it
     * will tail-call in __pkvm_init_finalise() which will have to deal
     * with the host context directly.
     */
    cpu_reg(host_ctxt, 1) = __pkvm_init(phys, size, nr_cpus, per_cpu_base,
                        hyp_va_bits);
}

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handle___pkvm_init_vcpu()

static void handle___pkvm_init_vcpu ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 300 of file hyp-main.c.

{
    DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1);
    DECLARE_REG(struct kvm_vcpu *, host_vcpu, host_ctxt, 2);
    DECLARE_REG(unsigned long, vcpu_hva, host_ctxt, 3);
 
    host_vcpu = kern_hyp_va(host_vcpu);
    cpu_reg(host_ctxt, 1) = __pkvm_init_vcpu(handle, host_vcpu, vcpu_hva);
}

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handle___pkvm_init_vm()

static void handle___pkvm_init_vm ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 290 of file hyp-main.c.

{
    DECLARE_REG(struct kvm *, host_kvm, host_ctxt, 1);
    DECLARE_REG(unsigned long, vm_hva, host_ctxt, 2);
    DECLARE_REG(unsigned long, pgd_hva, host_ctxt, 3);
 
    host_kvm = kern_hyp_va(host_kvm);
    cpu_reg(host_ctxt, 1) = __pkvm_init_vm(host_kvm, vm_hva, pgd_hva);
}

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handle___pkvm_prot_finalize()

static void handle___pkvm_prot_finalize ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 278 of file hyp-main.c.

{
    cpu_reg(host_ctxt, 1) = __pkvm_prot_finalize();
}

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handle___pkvm_teardown_vm()

static void handle___pkvm_teardown_vm ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 310 of file hyp-main.c.

{
    DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1);
 
    cpu_reg(host_ctxt, 1) = __pkvm_teardown_vm(handle);
}

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handle___pkvm_vcpu_init_traps()

static void handle___pkvm_vcpu_init_traps ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 283 of file hyp-main.c.

{
    DECLARE_REG(struct kvm_vcpu *, vcpu, host_ctxt, 1);
 
    __pkvm_vcpu_init_traps(kern_hyp_va(vcpu));
}

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handle___vgic_v3_get_gic_config()

static void handle___vgic_v3_get_gic_config ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 176 of file hyp-main.c.

{
    cpu_reg(host_ctxt, 1) = __vgic_v3_get_gic_config();
}

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handle___vgic_v3_init_lrs()

static void handle___vgic_v3_init_lrs ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 191 of file hyp-main.c.

{
    __vgic_v3_init_lrs();
}

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handle___vgic_v3_read_vmcr()

static void handle___vgic_v3_read_vmcr ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 181 of file hyp-main.c.

{
    cpu_reg(host_ctxt, 1) = __vgic_v3_read_vmcr();
}

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handle___vgic_v3_restore_aprs()

static void handle___vgic_v3_restore_aprs ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 208 of file hyp-main.c.

{
    DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1);
 
    __vgic_v3_restore_aprs(kern_hyp_va(cpu_if));
}

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handle___vgic_v3_save_aprs()

static void handle___vgic_v3_save_aprs ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 201 of file hyp-main.c.

{
    DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1);
 
    __vgic_v3_save_aprs(kern_hyp_va(cpu_if));
}

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handle___vgic_v3_write_vmcr()

static void handle___vgic_v3_write_vmcr ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 186 of file hyp-main.c.

{
    __vgic_v3_write_vmcr(cpu_reg(host_ctxt, 1));
}

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handle_host_hcall()

static void handle_host_hcall ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 353 of file hyp-main.c.

{
    DECLARE_REG(unsigned long, id, host_ctxt, 0);
    unsigned long hcall_min = 0;
    hcall_t hfn;
 
    /*
     * If pKVM has been initialised then reject any calls to the
     * early "privileged" hypercalls. Note that we cannot reject
     * calls to __pkvm_prot_finalize for two reasons: (1) The static
     * key used to determine initialisation must be toggled prior to
     * finalisation and (2) finalisation is performed on a per-CPU
     * basis. This is all fine, however, since __pkvm_prot_finalize
     * returns -EPERM after the first call for a given CPU.
     */
    if (static_branch_unlikely(&kvm_protected_mode_initialized))
        hcall_min = __KVM_HOST_SMCCC_FUNC___pkvm_prot_finalize;
 
    id &= ~ARM_SMCCC_CALL_HINTS;
    id -= KVM_HOST_SMCCC_ID(0);
 
    if (unlikely(id < hcall_min || id >= ARRAY_SIZE(host_hcall)))
        goto inval;
 
    hfn = host_hcall[id];
    if (unlikely(!hfn))
        goto inval;
 
    cpu_reg(host_ctxt, 0) = SMCCC_RET_SUCCESS;
    hfn(host_ctxt);
 
    return;
inval:
    cpu_reg(host_ctxt, 0) = SMCCC_RET_NOT_SUPPORTED;
}

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handle_host_smc()

static void handle_host_smc ( struct kvm_cpu_context *  host_ctxt )

static

Definition at line 394 of file hyp-main.c.

{
    DECLARE_REG(u64, func_id, host_ctxt, 0);
    bool handled;
 
    func_id &= ~ARM_SMCCC_CALL_HINTS;
 
    handled = kvm_host_psci_handler(host_ctxt, func_id);
    if (!handled)
        handled = kvm_host_ffa_handler(host_ctxt, func_id);
    if (!handled)
        default_host_smc_handler(host_ctxt);
 
    /* SMC was trapped, move ELR past the current PC. */
    kvm_skip_host_instr();
}

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handle_trap()

void handle_trap

(

struct kvm_cpu_context *

host_ctxt

)

Definition at line 411 of file hyp-main.c.

{
    u64 esr = read_sysreg_el2(SYS_ESR);
 
    switch (ESR_ELx_EC(esr)) {
    case ESR_ELx_EC_HVC64:
        handle_host_hcall(host_ctxt);
        break;
    case ESR_ELx_EC_SMC64:
        handle_host_smc(host_ctxt);
        break;
    case ESR_ELx_EC_SVE:
        if (has_hvhe())
            sysreg_clear_set(cpacr_el1, 0, (CPACR_EL1_ZEN_EL1EN |
                            CPACR_EL1_ZEN_EL0EN));
        else
            sysreg_clear_set(cptr_el2, CPTR_EL2_TZ, 0);
        isb();
        sve_cond_update_zcr_vq(ZCR_ELx_LEN_MASK, SYS_ZCR_EL2);
        break;
    case ESR_ELx_EC_IABT_LOW:
    case ESR_ELx_EC_DABT_LOW:
        handle_host_mem_abort(host_ctxt);
        break;
    default:
        BUG();
    }
}

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sync_hyp_vcpu()

static void sync_hyp_vcpu ( struct pkvm_hyp_vcpu *  hyp_vcpu )

static

Definition at line 52 of file hyp-main.c.

{
    struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu;
    struct vgic_v3_cpu_if *hyp_cpu_if = &hyp_vcpu->vcpu.arch.vgic_cpu.vgic_v3;
    struct vgic_v3_cpu_if *host_cpu_if = &host_vcpu->arch.vgic_cpu.vgic_v3;
    unsigned int i;
 
    host_vcpu->arch.ctxt        = hyp_vcpu->vcpu.arch.ctxt;
 
    host_vcpu->arch.hcr_el2     = hyp_vcpu->vcpu.arch.hcr_el2;
    host_vcpu->arch.cptr_el2    = hyp_vcpu->vcpu.arch.cptr_el2;
 
    host_vcpu->arch.fault       = hyp_vcpu->vcpu.arch.fault;
 
    host_vcpu->arch.iflags      = hyp_vcpu->vcpu.arch.iflags;
    host_vcpu->arch.fp_state    = hyp_vcpu->vcpu.arch.fp_state;
 
    host_cpu_if->vgic_hcr       = hyp_cpu_if->vgic_hcr;
    for (i = 0; i < hyp_cpu_if->used_lrs; ++i)
        host_cpu_if->vgic_lr[i] = hyp_cpu_if->vgic_lr[i];
}

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Variable Documentation

host_hcall

const hcall_t host_hcall[]

static

Definition at line 321 of file hyp-main.c.