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kvm: x86: handle XSAVES vmcs and vmexit

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Initialize the XSS exit bitmap.  It is zero so there should be no XSAVES
or XRSTORS exits.

Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wanpeng Li 2014-12-02 19:14:58 +08:00 committed by Paolo Bonzini
parent 404e0a19e1
commit f53cd63c2d
3 changed files with 28 additions and 1 deletions
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2
arch/x86/include/asm/vmx.h
View file

@ -160,6 +160,8 @@ enum vmcs_field {
EOI_EXIT_BITMAP3_HIGH = 0x00002023,
VMREAD_BITMAP = 0x00002026,
VMWRITE_BITMAP = 0x00002028,
XSS_EXIT_BITMAP = 0x0000202C,
XSS_EXIT_BITMAP_HIGH = 0x0000202D,
GUEST_PHYSICAL_ADDRESS = 0x00002400,
GUEST_PHYSICAL_ADDRESS_HIGH = 0x00002401,
VMCS_LINK_POINTER = 0x00002800,

6
arch/x86/include/uapi/asm/vmx.h
View file

@ -72,6 +72,8 @@
#define EXIT_REASON_XSETBV 55
#define EXIT_REASON_APIC_WRITE 56
#define EXIT_REASON_INVPCID 58
#define EXIT_REASON_XSAVES 63
#define EXIT_REASON_XRSTORS 64
#define VMX_EXIT_REASONS \
{ EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
@ -116,6 +118,8 @@
{ EXIT_REASON_INVALID_STATE, "INVALID_STATE" }, \
{ EXIT_REASON_INVD, "INVD" }, \
{ EXIT_REASON_INVVPID, "INVVPID" }, \
{ EXIT_REASON_INVPCID, "INVPCID" }
{ EXIT_REASON_INVPCID, "INVPCID" }, \
{ EXIT_REASON_XSAVES, "XSAVES" }, \
{ EXIT_REASON_XRSTORS, "XRSTORS" }
#endif /* _UAPIVMX_H */

21
arch/x86/kvm/vmx.c
View file

@ -761,6 +761,7 @@ static u64 construct_eptp(unsigned long root_hpa);
static void kvm_cpu_vmxon(u64 addr);
static void kvm_cpu_vmxoff(void);
static bool vmx_mpx_supported(void);
static bool vmx_xsaves_supported(void);
static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr);
static void vmx_set_segment(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg);
@ -4337,6 +4338,7 @@ static void ept_set_mmio_spte_mask(void)
kvm_mmu_set_mmio_spte_mask((0x3ull << 62) | 0x6ull);
}
#define VMX_XSS_EXIT_BITMAP 0
/*
* Sets up the vmcs for emulated real mode.
*/
@ -4446,6 +4448,9 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
set_cr4_guest_host_mask(vmx);
if (vmx_xsaves_supported())
vmcs_write64(XSS_EXIT_BITMAP, VMX_XSS_EXIT_BITMAP);
return 0;
}
@ -5334,6 +5339,20 @@ static int handle_xsetbv(struct kvm_vcpu *vcpu)
return 1;
}
static int handle_xsaves(struct kvm_vcpu *vcpu)
{
skip_emulated_instruction(vcpu);
WARN(1, "this should never happen\n");
return 1;
}
static int handle_xrstors(struct kvm_vcpu *vcpu)
{
skip_emulated_instruction(vcpu);
WARN(1, "this should never happen\n");
return 1;
}
static int handle_apic_access(struct kvm_vcpu *vcpu)
{
if (likely(fasteoi)) {
@ -6951,6 +6970,8 @@ static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
[EXIT_REASON_MONITOR_INSTRUCTION] = handle_monitor,
[EXIT_REASON_INVEPT] = handle_invept,
[EXIT_REASON_INVVPID] = handle_invvpid,
[EXIT_REASON_XSAVES] = handle_xsaves,
[EXIT_REASON_XRSTORS] = handle_xrstors,
};
static const int kvm_vmx_max_exit_handlers =