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target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs 

This would have caught the bug in the previous patch.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-03-30 22:55:29 +02:00
parent 273c515c0a
commit 48e1a45c31
1 changed files with 30 additions and 4 deletions
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34
target-i386/kvm.c
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@ -141,6 +141,7 @@ static int kvm_get_tsc(CPUState *cs)
return ret; return ret;
} }
assert(ret == 1);
env->tsc = msr_data.entries[0].data; env->tsc = msr_data.entries[0].data;
return 0; return 0;
} }
@ -1446,6 +1447,7 @@ static int kvm_put_tscdeadline_msr(X86CPU *cpu)
struct kvm_msr_entry entries[1]; struct kvm_msr_entry entries[1];
} msr_data; } msr_data;
struct kvm_msr_entry *msrs = msr_data.entries; struct kvm_msr_entry *msrs = msr_data.entries;
int ret;
if (!has_msr_tsc_deadline) { if (!has_msr_tsc_deadline) {
return 0; return 0;
@ -1457,7 +1459,13 @@ static int kvm_put_tscdeadline_msr(X86CPU *cpu)
.nmsrs = 1, .nmsrs = 1,
}; };
return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data);
if (ret < 0) {
return ret;
}
assert(ret == 1);
return 0;
} }
/* /*
@ -1472,6 +1480,11 @@ static int kvm_put_msr_feature_control(X86CPU *cpu)
struct kvm_msrs info; struct kvm_msrs info;
struct kvm_msr_entry entry; struct kvm_msr_entry entry;
} msr_data; } msr_data;
int ret;
if (!has_msr_feature_control) {
return 0;
}
kvm_msr_entry_set(&msr_data.entry, MSR_IA32_FEATURE_CONTROL, kvm_msr_entry_set(&msr_data.entry, MSR_IA32_FEATURE_CONTROL,
cpu->env.msr_ia32_feature_control); cpu->env.msr_ia32_feature_control);
@ -1480,7 +1493,13 @@ static int kvm_put_msr_feature_control(X86CPU *cpu)
.nmsrs = 1, .nmsrs = 1,
}; };
return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data);
if (ret < 0) {
return ret;
}
assert(ret == 1);
return 0;
} }
static int kvm_put_msrs(X86CPU *cpu, int level) static int kvm_put_msrs(X86CPU *cpu, int level)
@ -1492,6 +1511,7 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
} msr_data; } msr_data;
struct kvm_msr_entry *msrs = msr_data.entries; struct kvm_msr_entry *msrs = msr_data.entries;
int n = 0, i; int n = 0, i;
int ret;
kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs);
kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp);
@ -1685,8 +1705,13 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
.nmsrs = n, .nmsrs = n,
}; };
return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data);
if (ret < 0) {
return ret;
}
assert(ret == n);
return 0;
} }
@ -2055,6 +2080,7 @@ static int kvm_get_msrs(X86CPU *cpu)
return ret; return ret;
} }
assert(ret == n);
for (i = 0; i < ret; i++) { for (i = 0; i < ret; i++) {
uint32_t index = msrs[i].index; uint32_t index = msrs[i].index;
switch (index) { switch (index) {
@ -2511,7 +2537,7 @@ int kvm_arch_put_registers(CPUState *cpu, int level)
assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));
if (level >= KVM_PUT_RESET_STATE && has_msr_feature_control) { if (level >= KVM_PUT_RESET_STATE) {
ret = kvm_put_msr_feature_control(x86_cpu); ret = kvm_put_msr_feature_control(x86_cpu);
if (ret < 0) { if (ret < 0) {
return ret; return ret;