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KVM: X86: Introduce handle_ud() 

Introduce handle_ud() to handle invalid opcode, this function will be
used by later patches.

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wanpeng Li 2018-04-03 16:28:48 -07:00 committed by Paolo Bonzini
parent 4fde8d57cf
commit 082d06edab
4 changed files with 18 additions and 16 deletions
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9
arch/x86/kvm/svm.c
View File

@ -2676,14 +2676,7 @@ static int bp_interception(struct vcpu_svm *svm)
static int ud_interception(struct vcpu_svm *svm)
{
int er;
er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
if (er == EMULATE_USER_EXIT)
return 0;
if (er != EMULATE_DONE)
kvm_queue_exception(&svm->vcpu, UD_VECTOR);
return 1;
return handle_ud(&svm->vcpu);
}
static int ac_interception(struct vcpu_svm *svm)

10
arch/x86/kvm/vmx.c
View File

@ -6434,14 +6434,8 @@ static int handle_exception(struct kvm_vcpu *vcpu)
if (is_nmi(intr_info))
return 1; /* already handled by vmx_vcpu_run() */
if (is_invalid_opcode(intr_info)) {
er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
if (er == EMULATE_USER_EXIT)
return 0;
if (er != EMULATE_DONE)
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
if (is_invalid_opcode(intr_info))
return handle_ud(vcpu);
error_code = 0;
if (intr_info & INTR_INFO_DELIVER_CODE_MASK)

13
arch/x86/kvm/x86.c
View File

@ -4840,6 +4840,19 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
}
EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
int handle_ud(struct kvm_vcpu *vcpu)
{
enum emulation_result er;
er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
if (er == EMULATE_USER_EXIT)
return 0;
if (er != EMULATE_DONE)
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
EXPORT_SYMBOL_GPL(handle_ud);
static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
gpa_t gpa, bool write)
{

2
arch/x86/kvm/x86.h
View File

@ -255,6 +255,8 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
gva_t addr, void *val, unsigned int bytes,
struct x86_exception *exception);
int handle_ud(struct kvm_vcpu *vcpu);
void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);