This patch add intercept checks for emulated one-byte
instructions to the KVM instruction emulation path.
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
arch/x86/kvm/emulate.c | 4 ++--
arch/x86/kvm/svm.c | 14 ++++++++++++++
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4a5881d..af04be4 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2504,7 +2504,7 @@ static struct opcode opcode_table[256] = {
D(DstMem | SrcNone | ModRM | Mov), D(ModRM | SrcMem | NoAccess | DstReg),
D(ImplicitOps | SrcMem16 | ModRM), G(0, group1A),
/* 0x90 - 0x97 */
- X8(D(SrcAcc | DstReg)),
+ DI(SrcAcc | DstReg, pause), X7(D(SrcAcc | DstReg)),
/* 0x98 - 0x9F */
D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),
I(SrcImmFAddr | No64, em_call_far), N,
@@ -2546,7 +2546,7 @@ static struct opcode opcode_table[256] = {
D(SrcImmFAddr | No64), D(SrcImmByte | ImplicitOps),
D2bv(SrcNone | DstAcc), D2bv(SrcAcc | ImplicitOps),
/* 0xF0 - 0xF7 */
- N, N, N, N,
+ N, DI(ImplicitOps, icebp), N, N,
DI(ImplicitOps | Priv, hlt), D(ImplicitOps),
G(ByteOp, group3), G(0, group3),
/* 0xF8 - 0xFF */
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ec99d0a..67997b3 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3919,6 +3919,13 @@ static struct __x86_intercept {
[x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
[x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
[x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
+ [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
+ [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
+ [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
+ [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
+ [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
+ [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
+ [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
};
#undef PRE_EX
@@ -3988,6 +3995,13 @@ static int svm_check_intercept(struct kvm_vcpu *vcpu,
else
vmcb->control.exit_info_1 = 0;
break;
+ case SVM_EXIT_PAUSE:
+ /*
+ * We get this for NOP only, but pause
+ * is rep not, check this here
+ */
+ if (info->rep_prefix != REPE_PREFIX)
+ goto out;
default:
break;
}
--
1.7.1
--
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