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[Qemu-devel] [PULL 1/2] kvm: Use KVM_GET_MSR_INDEX_LIST for MSR_IA32_ARC
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL 1/2] kvm: Use KVM_GET_MSR_INDEX_LIST for MSR_IA32_ARCH_CAPABILITIES support |
Date: |
Mon, 26 Nov 2018 18:59:40 -0200 |
From: Bandan Das <address@hidden>
When writing to guest's MSR_IA32_ARCH_CAPABILITIES, check whether it's
supported in the guest using the KVM_GET_MSR_INDEX_LIST ioctl.
Fixes: d86f963694df27f11b3681ffd225c9362de1b634
Suggested-by: Eduardo Habkost <address@hidden>
Tested-by: address@hidden
Signed-off-by: Bandan Das <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
target/i386/kvm.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index f524e7d929..3d6739a2b2 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -95,6 +95,7 @@ static bool has_msr_xss;
static bool has_msr_spec_ctrl;
static bool has_msr_virt_ssbd;
static bool has_msr_smi_count;
+static bool has_msr_arch_capabs;
static uint32_t has_architectural_pmu_version;
static uint32_t num_architectural_pmu_gp_counters;
@@ -1481,6 +1482,9 @@ static int kvm_get_supported_msrs(KVMState *s)
case MSR_VIRT_SSBD:
has_msr_virt_ssbd = true;
break;
+ case MSR_IA32_ARCH_CAPABILITIES:
+ has_msr_arch_capabs = true;
+ break;
}
}
}
@@ -2002,14 +2006,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
#endif
/* If host supports feature MSR, write down. */
- if (kvm_feature_msrs) {
- int i;
- for (i = 0; i < kvm_feature_msrs->nmsrs; i++)
- if (kvm_feature_msrs->indices[i] == MSR_IA32_ARCH_CAPABILITIES) {
- kvm_msr_entry_add(cpu, MSR_IA32_ARCH_CAPABILITIES,
- env->features[FEAT_ARCH_CAPABILITIES]);
- break;
- }
+ if (has_msr_arch_capabs) {
+ kvm_msr_entry_add(cpu, MSR_IA32_ARCH_CAPABILITIES,
+ env->features[FEAT_ARCH_CAPABILITIES]);
}
/*
--
2.18.0.rc1.1.g3f1ff2140