vmx_ops.h File Reference

#include <linux/nospec.h>
#include <asm/vmx.h>
#include "vmx_onhyperv.h"
#include "vmcs.h"
#include "../x86.h"

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Macros
#define	vmx_asm1(insn, op1, error_args...)
#define	vmx_asm2(insn, op1, op2, error_args...)

Functions
void	vmread_error (unsigned long field)
void	vmwrite_error (unsigned long field, unsigned long value)
void	vmclear_error (struct vmcs *vmcs, u64 phys_addr)
void	vmptrld_error (struct vmcs *vmcs, u64 phys_addr)
void	invvpid_error (unsigned long ext, u16 vpid, gva_t gva)
void	invept_error (unsigned long ext, u64 eptp, gpa_t gpa)
void	vmread_error_trampoline2 (unsigned long field, bool fault)
static __always_inline void	vmcs_check16 (unsigned long field)
static __always_inline void	vmcs_check32 (unsigned long field)
static __always_inline void	vmcs_check64 (unsigned long field)
static __always_inline void	vmcs_checkl (unsigned long field)
static __always_inline unsigned long	__vmcs_readl (unsigned long field)
static __always_inline u16	vmcs_read16 (unsigned long field)
static __always_inline u32	vmcs_read32 (unsigned long field)
static __always_inline u64	vmcs_read64 (unsigned long field)
static __always_inline unsigned long	vmcs_readl (unsigned long field)
static __always_inline void	__vmcs_writel (unsigned long field, unsigned long value)
static __always_inline void	vmcs_write16 (unsigned long field, u16 value)
static __always_inline void	vmcs_write32 (unsigned long field, u32 value)
static __always_inline void	vmcs_write64 (unsigned long field, u64 value)
static __always_inline void	vmcs_writel (unsigned long field, unsigned long value)
static __always_inline void	vmcs_clear_bits (unsigned long field, u32 mask)
static __always_inline void	vmcs_set_bits (unsigned long field, u32 mask)
static void	vmcs_clear (struct vmcs *vmcs)
static void	vmcs_load (struct vmcs *vmcs)
static void	__invvpid (unsigned long ext, u16 vpid, gva_t gva)
static void	__invept (unsigned long ext, u64 eptp, gpa_t gpa)
static void	vpid_sync_vcpu_single (int vpid)
static void	vpid_sync_vcpu_global (void)
static void	vpid_sync_context (int vpid)
static void	vpid_sync_vcpu_addr (int vpid, gva_t addr)
static void	ept_sync_global (void)
static void	ept_sync_context (u64 eptp)

Variables
unsigned long	vmread_error_trampoline

Macro Definition Documentation

vmx_asm1

#define vmx_asm1	(		insn,
			op1,
			error_args...
	)

Value:

do {                                    \
    asm goto("1: " __stringify(insn) " %0\n\t"          \
              ".byte 0x2e\n\t" /* branch not taken hint */  \
              "jna %l[error]\n\t"               \
              _ASM_EXTABLE(1b, %l[fault])           \
              : : op1 : "cc" : error, fault);       \
    return;                             \
error:                                  \
    instrumentation_begin();                    \
    insn##_error(error_args);                   \
    instrumentation_end();                      \
    return;                             \
fault:                                  \
    kvm_spurious_fault();                       \
} while (0)

Definition at line 189 of file vmx_ops.h.

vmx_asm2

#define vmx_asm2	(		insn,
			op1,
			op2,
			error_args...
	)

Value:

do {                                    \
    asm goto("1: "  __stringify(insn) " %1, %0\n\t"         \
              ".byte 0x2e\n\t" /* branch not taken hint */  \
              "jna %l[error]\n\t"               \
              _ASM_EXTABLE(1b, %l[fault])           \
              : : op1, op2 : "cc" : error, fault);      \
    return;                             \
error:                                  \
    instrumentation_begin();                    \
    insn##_error(error_args);                   \
    instrumentation_end();                      \
    return;                             \
fault:                                  \
    kvm_spurious_fault();                       \
} while (0)

Definition at line 206 of file vmx_ops.h.

Function Documentation

__invept()

static void __invept ( unsigned long  ext, u64  eptp, gpa_t  gpa  )

inlinestatic

Definition at line 315 of file vmx_ops.h.

{
    struct {
        u64 eptp, gpa;
    } operand = {eptp, gpa};
 
    vmx_asm2(invept, "r"(ext), "m"(operand), ext, eptp, gpa);
}

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__invvpid()

static void __invvpid ( unsigned long  ext, u16  vpid, gva_t  gva  )

inlinestatic

Definition at line 304 of file vmx_ops.h.

{
    struct {
        u64 vpid : 16;
        u64 rsvd : 48;
        u64 gva;
    } operand = { vpid, 0, gva };
 
    vmx_asm2(invvpid, "r"(ext), "m"(operand), ext, vpid, gva);
}

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__vmcs_readl()

static __always_inline unsigned long __vmcs_readl ( unsigned long  field )

static

Definition at line 91 of file vmx_ops.h.

{
    unsigned long value;
 
#ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT
 
    asm_goto_output("1: vmread %[field], %[output]\n\t"
              "jna %l[do_fail]\n\t"
 
              _ASM_EXTABLE(1b, %l[do_exception])
 
              : [output] "=r" (value)
              : [field] "r" (field)
              : "cc"
              : do_fail, do_exception);
 
    return value;
 
do_fail:
    instrumentation_begin();
    vmread_error(field);
    instrumentation_end();
    return 0;
 
do_exception:
    kvm_spurious_fault();
    return 0;
 
#else /* !CONFIG_CC_HAS_ASM_GOTO_OUTPUT */
 
    asm volatile("1: vmread %2, %1\n\t"
             ".byte 0x3e\n\t" /* branch taken hint */
             "ja 3f\n\t"
 
             /*
              * VMREAD failed.  Push '0' for @fault, push the failing
              * @field, and bounce through the trampoline to preserve
              * volatile registers.
              */
             "xorl %k1, %k1\n\t"
             "2:\n\t"
             "push %1\n\t"
             "push %2\n\t"
             "call vmread_error_trampoline\n\t"
 
             /*
              * Unwind the stack.  Note, the trampoline zeros out the
              * memory for @fault so that the result is '0' on error.
              */
             "pop %2\n\t"
             "pop %1\n\t"
             "3:\n\t"
 
             /* VMREAD faulted.  As above, except push '1' for @fault. */
             _ASM_EXTABLE_TYPE_REG(1b, 2b, EX_TYPE_ONE_REG, %1)
 
             : ASM_CALL_CONSTRAINT, "=&r"(value) : "r"(field) : "cc");
    return value;
 
#endif /* CONFIG_CC_HAS_ASM_GOTO_OUTPUT */
}

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__vmcs_writel()

static __always_inline void __vmcs_writel ( unsigned long  field, unsigned long  value  )

static

Definition at line 223 of file vmx_ops.h.

{
    vmx_asm2(vmwrite, "r"(field), "rm"(value), field, value);
}

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ept_sync_context()

static void ept_sync_context ( u64  eptp )

inlinestatic

Definition at line 361 of file vmx_ops.h.

{
    if (cpu_has_vmx_invept_context())
        __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
    else
        ept_sync_global();
}

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ept_sync_global()

static void ept_sync_global ( void  )

inlinestatic

Definition at line 356 of file vmx_ops.h.

{
    __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
}

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invept_error()

void invept_error	(	unsigned long	ext,
		u64	eptp,
		gpa_t	gpa
	)

Definition at line 476 of file vmx.c.

{
    vmx_insn_failed("invept failed: ext=0x%lx eptp=%llx gpa=0x%llx\n",
            ext, eptp, gpa);
}

invvpid_error()

void invvpid_error	(	unsigned long	ext,
		u16	vpid,
		gva_t	gva
	)

Definition at line 470 of file vmx.c.

{
    vmx_insn_failed("invvpid failed: ext=0x%lx vpid=%u gva=0x%lx\n",
            ext, vpid, gva);
}

vmclear_error()

void vmclear_error	(	struct vmcs *	vmcs,
		u64	phys_addr
	)

Definition at line 458 of file vmx.c.

{
    vmx_insn_failed("vmclear failed: %p/%llx err=%u\n",
            vmcs, phys_addr, vmcs_read32(VM_INSTRUCTION_ERROR));
}

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vmcs_check16()

static __always_inline void vmcs_check16 ( unsigned long  field )

static

Definition at line 43 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
             "16-bit accessor invalid for 64-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
             "16-bit accessor invalid for 64-bit high field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
             "16-bit accessor invalid for 32-bit high field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
             "16-bit accessor invalid for natural width field");
}

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vmcs_check32()

static __always_inline void vmcs_check32 ( unsigned long  field )

static

Definition at line 55 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
             "32-bit accessor invalid for 16-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
             "32-bit accessor invalid for 64-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
             "32-bit accessor invalid for 64-bit high field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
             "32-bit accessor invalid for natural width field");
}

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vmcs_check64()

static __always_inline void vmcs_check64 ( unsigned long  field )

static

Definition at line 67 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
             "64-bit accessor invalid for 16-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
             "64-bit accessor invalid for 64-bit high field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
             "64-bit accessor invalid for 32-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
             "64-bit accessor invalid for natural width field");
}

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vmcs_checkl()

static __always_inline void vmcs_checkl ( unsigned long  field )

static

Definition at line 79 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
             "Natural width accessor invalid for 16-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
             "Natural width accessor invalid for 64-bit field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
             "Natural width accessor invalid for 64-bit high field");
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
             "Natural width accessor invalid for 32-bit field");
}

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vmcs_clear()

static void vmcs_clear ( struct vmcs *  vmcs )

inlinestatic

Definition at line 287 of file vmx_ops.h.

{
    u64 phys_addr = __pa(vmcs);
 
    vmx_asm1(vmclear, "m"(phys_addr), vmcs, phys_addr);
}

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vmcs_clear_bits()

static __always_inline void vmcs_clear_bits ( unsigned long  field, u32  mask  )

static

Definition at line 267 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
             "vmcs_clear_bits does not support 64-bit fields");
    if (kvm_is_using_evmcs())
        return evmcs_write32(field, evmcs_read32(field) & ~mask);
 
    __vmcs_writel(field, __vmcs_readl(field) & ~mask);
}

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vmcs_load()

static void vmcs_load ( struct vmcs *  vmcs )

inlinestatic

Definition at line 294 of file vmx_ops.h.

{
    u64 phys_addr = __pa(vmcs);
 
    if (kvm_is_using_evmcs())
        return evmcs_load(phys_addr);
 
    vmx_asm1(vmptrld, "m"(phys_addr), vmcs, phys_addr);
}

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vmcs_read16()

static __always_inline u16 vmcs_read16 ( unsigned long  field )

static

Definition at line 153 of file vmx_ops.h.

{
    vmcs_check16(field);
    if (kvm_is_using_evmcs())
        return evmcs_read16(field);
    return __vmcs_readl(field);
}

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vmcs_read32()

static __always_inline u32 vmcs_read32 ( unsigned long  field )

static

Definition at line 161 of file vmx_ops.h.

{
    vmcs_check32(field);
    if (kvm_is_using_evmcs())
        return evmcs_read32(field);
    return __vmcs_readl(field);
}

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vmcs_read64()

static __always_inline u64 vmcs_read64 ( unsigned long  field )

static

Definition at line 169 of file vmx_ops.h.

{
    vmcs_check64(field);
    if (kvm_is_using_evmcs())
        return evmcs_read64(field);
#ifdef CONFIG_X86_64
    return __vmcs_readl(field);
#else
    return __vmcs_readl(field) | ((u64)__vmcs_readl(field+1) << 32);
#endif
}

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vmcs_readl()

static __always_inline unsigned long vmcs_readl ( unsigned long  field )

static

Definition at line 181 of file vmx_ops.h.

{
    vmcs_checkl(field);
    if (kvm_is_using_evmcs())
        return evmcs_read64(field);
    return __vmcs_readl(field);
}

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vmcs_set_bits()

static __always_inline void vmcs_set_bits ( unsigned long  field, u32  mask  )

static

Definition at line 277 of file vmx_ops.h.

{
    BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
             "vmcs_set_bits does not support 64-bit fields");
    if (kvm_is_using_evmcs())
        return evmcs_write32(field, evmcs_read32(field) | mask);
 
    __vmcs_writel(field, __vmcs_readl(field) | mask);
}

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vmcs_write16()

static __always_inline void vmcs_write16 ( unsigned long  field, u16  value  )

static

Definition at line 228 of file vmx_ops.h.

{
    vmcs_check16(field);
    if (kvm_is_using_evmcs())
        return evmcs_write16(field, value);
 
    __vmcs_writel(field, value);
}

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vmcs_write32()

static __always_inline void vmcs_write32 ( unsigned long  field, u32  value  )

static

Definition at line 237 of file vmx_ops.h.

{
    vmcs_check32(field);
    if (kvm_is_using_evmcs())
        return evmcs_write32(field, value);
 
    __vmcs_writel(field, value);
}

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vmcs_write64()

static __always_inline void vmcs_write64 ( unsigned long  field, u64  value  )

static

Definition at line 246 of file vmx_ops.h.

{
    vmcs_check64(field);
    if (kvm_is_using_evmcs())
        return evmcs_write64(field, value);
 
    __vmcs_writel(field, value);
#ifndef CONFIG_X86_64
    __vmcs_writel(field+1, value >> 32);
#endif
}

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vmcs_writel()

static __always_inline void vmcs_writel ( unsigned long  field, unsigned long  value  )

static

Definition at line 258 of file vmx_ops.h.

{
    vmcs_checkl(field);
    if (kvm_is_using_evmcs())
        return evmcs_write64(field, value);
 
    __vmcs_writel(field, value);
}

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vmptrld_error()

void vmptrld_error	(	struct vmcs *	vmcs,
		u64	phys_addr
	)

Definition at line 464 of file vmx.c.

{
    vmx_insn_failed("vmptrld failed: %p/%llx err=%u\n",
            vmcs, phys_addr, vmcs_read32(VM_INSTRUCTION_ERROR));
}

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vmread_error()

void vmread_error

(

unsigned long

field

)

Definition at line 434 of file vmx.c.

{
    vmx_insn_failed("vmread failed: field=%lx\n", field);
}

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vmread_error_trampoline2()

void vmread_error_trampoline2	(	unsigned long	field,
		bool	fault
	)

Definition at line 440 of file vmx.c.

{
    if (fault) {
        kvm_spurious_fault();
    } else {
        instrumentation_begin();
        vmread_error(field);
        instrumentation_end();
    }
}

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vmwrite_error()

void vmwrite_error	(	unsigned long	field,
		unsigned long	value
	)

Definition at line 452 of file vmx.c.

{
    vmx_insn_failed("vmwrite failed: field=%lx val=%lx err=%u\n",
            field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
}

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vpid_sync_context()

static void vpid_sync_context ( int  vpid )

inlinestatic

Definition at line 337 of file vmx_ops.h.

{
    if (cpu_has_vmx_invvpid_single())
        vpid_sync_vcpu_single(vpid);
    else if (vpid != 0)
        vpid_sync_vcpu_global();
}

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vpid_sync_vcpu_addr()

static void vpid_sync_vcpu_addr ( int  vpid, gva_t  addr  )

inlinestatic

Definition at line 345 of file vmx_ops.h.

{
    if (vpid == 0)
        return;
 
    if (cpu_has_vmx_invvpid_individual_addr())
        __invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR, vpid, addr);
    else
        vpid_sync_context(vpid);
}

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vpid_sync_vcpu_global()

static void vpid_sync_vcpu_global ( void  )

inlinestatic

Definition at line 332 of file vmx_ops.h.

{
    __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
}

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vpid_sync_vcpu_single()

static void vpid_sync_vcpu_single ( int  vpid )

inlinestatic

Definition at line 324 of file vmx_ops.h.

{
    if (vpid == 0)
        return;
 
    __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vpid, 0);
}

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Variable Documentation

vmread_error_trampoline

unsigned long vmread_error_trampoline

extern