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| author | Takuya Yoshikawa | 2011-11-22 07:20:03 +0100 |
|---|---|---|
| committer | Avi Kivity | 2011-12-27 10:17:29 +0100 |
| commit | e1e210b0a7f7b4d14577bdc76719963f7facc0e7 (patch) | |
| tree | ec8ed131f1318a05fe1d31035dacf9ab09f30bf3 /arch/x86/kvm/emulate.c | |
| parent | KVM: x86 emulator: Use opcode::execute for MOV to cr/dr (diff) | |
| download | kernel-qcow2-linux-e1e210b0a7f7b4d14577bdc76719963f7facc0e7.tar.gz kernel-qcow2-linux-e1e210b0a7f7b4d14577bdc76719963f7facc0e7.tar.xz kernel-qcow2-linux-e1e210b0a7f7b4d14577bdc76719963f7facc0e7.zip | |
KVM: x86 emulator: Use opcode::execute for WRMSR/RDMSR
WRMSR: 0F 30
RDMSR: 0F 32
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 52 |
1 files changed, 26 insertions, 26 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 7fe5ed126f6f..906c5eb34aa7 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2666,6 +2666,30 @@ static int em_dr_write(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int em_wrmsr(struct x86_emulate_ctxt *ctxt) +{ + u64 msr_data; + + msr_data = (u32)ctxt->regs[VCPU_REGS_RAX] + | ((u64)ctxt->regs[VCPU_REGS_RDX] << 32); + if (ctxt->ops->set_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], msr_data)) + return emulate_gp(ctxt, 0); + + return X86EMUL_CONTINUE; +} + +static int em_rdmsr(struct x86_emulate_ctxt *ctxt) +{ + u64 msr_data; + + if (ctxt->ops->get_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], &msr_data)) + return emulate_gp(ctxt, 0); + + ctxt->regs[VCPU_REGS_RAX] = (u32)msr_data; + ctxt->regs[VCPU_REGS_RDX] = msr_data >> 32; + return X86EMUL_CONTINUE; +} + static int em_mov_rm_sreg(struct x86_emulate_ctxt *ctxt) { if (ctxt->modrm_reg > VCPU_SREG_GS) @@ -3337,9 +3361,9 @@ static struct opcode twobyte_table[256] = { N, N, N, N, N, N, N, N, N, N, N, N, /* 0x30 - 0x3F */ - DI(ImplicitOps | Priv, wrmsr), + II(ImplicitOps | Priv, em_wrmsr, wrmsr), IIP(ImplicitOps, em_rdtsc, rdtsc, check_rdtsc), - DI(ImplicitOps | Priv, rdmsr), + II(ImplicitOps | Priv, em_rdmsr, rdmsr), DIP(ImplicitOps | Priv, rdpmc, check_rdpmc), I(ImplicitOps | VendorSpecific, em_sysenter), I(ImplicitOps | Priv | VendorSpecific, em_sysexit), @@ -3818,7 +3842,6 @@ static bool string_insn_completed(struct x86_emulate_ctxt *ctxt) int x86_emulate_insn(struct x86_emulate_ctxt *ctxt) { struct x86_emulate_ops *ops = ctxt->ops; - u64 msr_data; int rc = X86EMUL_CONTINUE; int saved_dst_type = ctxt->dst.type; @@ -4108,29 +4131,6 @@ twobyte_insn: case 0x21: /* mov from dr to reg */ ops->get_dr(ctxt, ctxt->modrm_reg, &ctxt->dst.val); break; - case 0x30: - /* wrmsr */ - msr_data = (u32)ctxt->regs[VCPU_REGS_RAX] - | ((u64)ctxt->regs[VCPU_REGS_RDX] << 32); - if (ops->set_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], msr_data)) { - emulate_gp(ctxt, 0); - rc = X86EMUL_PROPAGATE_FAULT; - goto done; - } - rc = X86EMUL_CONTINUE; - break; - case 0x32: - /* rdmsr */ - if (ops->get_msr(ctxt, ctxt->regs[VCPU_REGS_RCX], &msr_data)) { - emulate_gp(ctxt, 0); - rc = X86EMUL_PROPAGATE_FAULT; - goto done; - } else { - ctxt->regs[VCPU_REGS_RAX] = (u32)msr_data; - ctxt->regs[VCPU_REGS_RDX] = msr_data >> 32; - } - rc = X86EMUL_CONTINUE; - break; case 0x40 ... 0x4f: /* cmov */ ctxt->dst.val = ctxt->dst.orig_val = ctxt->src.val; if (!test_cc(ctxt->b, ctxt->eflags)) |