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| author | Tao Xu <tao3.xu@intel.com> | 2019-10-11 15:41:03 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-10-23 17:50:27 +0200 |
| commit | 6508799707bbf018df82d354c388820217757f21 (patch) | |
| tree | 716cc4415ef040f4324ae5236100a6c5a04d870f /target/i386/kvm.c | |
| parent | 67192a298f5bf98f96e5516c3b6474c49e4853cd (diff) | |
| download | qemu-6508799707bbf018df82d354c388820217757f21.zip qemu-6508799707bbf018df82d354c388820217757f21.tar.gz qemu-6508799707bbf018df82d354c388820217757f21.tar.bz2 | |
target/i386: Add support for save/load IA32_UMWAIT_CONTROL MSR
UMWAIT and TPAUSE instructions use 32bits IA32_UMWAIT_CONTROL at MSR
index E1H to determines the maximum time in TSC-quanta that the processor
can reside in either C0.1 or C0.2.
This patch is to Add support for save/load IA32_UMWAIT_CONTROL MSR in
guest.
Co-developed-by: Jingqi Liu <jingqi.liu@intel.com>
Signed-off-by: Jingqi Liu <jingqi.liu@intel.com>
Signed-off-by: Tao Xu <tao3.xu@intel.com>
Message-Id: <20191011074103.30393-3-tao3.xu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/kvm.c')
| -rw-r--r-- | target/i386/kvm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 94c2339..bfd09bd 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -95,6 +95,7 @@ static bool has_msr_hv_stimer; static bool has_msr_hv_frequencies; static bool has_msr_hv_reenlightenment; static bool has_msr_xss; +static bool has_msr_umwait; static bool has_msr_spec_ctrl; static bool has_msr_virt_ssbd; static bool has_msr_smi_count; @@ -2005,6 +2006,9 @@ static int kvm_get_supported_msrs(KVMState *s) case MSR_IA32_XSS: has_msr_xss = true; break; + case MSR_IA32_UMWAIT_CONTROL: + has_msr_umwait = true; + break; case HV_X64_MSR_CRASH_CTL: has_msr_hv_crash = true; break; @@ -2684,6 +2688,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level) if (has_msr_xss) { kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss); } + if (has_msr_umwait) { + kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, env->umwait); + } if (has_msr_spec_ctrl) { kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, env->spec_ctrl); } @@ -3097,6 +3104,9 @@ static int kvm_get_msrs(X86CPU *cpu) if (has_msr_xss) { kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0); } + if (has_msr_umwait) { + kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, 0); + } if (has_msr_spec_ctrl) { kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); } @@ -3349,6 +3359,9 @@ static int kvm_get_msrs(X86CPU *cpu) case MSR_IA32_XSS: env->xss = msrs[i].data; break; + case MSR_IA32_UMWAIT_CONTROL: + env->umwait = msrs[i].data; + break; default: if (msrs[i].index >= MSR_MC0_CTL && msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { |