From 4d1b279b0675a8b483a5f101212d1dedfb1a3cec Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Wed, 20 Aug 2014 17:30:12 -0300 Subject: target-i386: Support migratable=no properly MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When the "migratable" property was implemented, the behavior was tested by changing the default on the code, but actually using the option on the command-line (e.g. "-cpu host,migratable=false") doesn't work as expected. This is a regression for a common use case of "-cpu host", which is to enable features that are supported by the host CPU + kernel before feature-specific code is added to QEMU. Fix this by initializing the feature words for "-cpu host" on x86_cpu_parse_featurestr(), right after parsing the CPU options. Signed-off-by: Eduardo Habkost Reviewed-by: Michael Roth Cc: qemu-stable@nongnu.org Signed-off-by: Andreas Färber --- target-i386/cpu-qom.h | 1 + target-i386/cpu.c | 23 +++++++++++++++-------- 2 files changed, 16 insertions(+), 8 deletions(-) (limited to 'target-i386') diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h index 71a1b97cfc..77554663a7 100644 --- a/target-i386/cpu-qom.h +++ b/target-i386/cpu-qom.h @@ -92,6 +92,7 @@ typedef struct X86CPU { bool enforce_cpuid; bool expose_kvm; bool migratable; + bool host_features; /* if true the CPUID code directly forward host cache leaves to the guest */ bool cache_info_passthrough; diff --git a/target-i386/cpu.c b/target-i386/cpu.c index fa811a02d1..a5826ecfa0 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -1254,6 +1254,9 @@ void x86_cpu_compat_set_features(const char *cpu_model, FeatureWord w, } } +static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w, + bool migratable_only); + #ifdef CONFIG_KVM static int cpu_x86_fill_model_id(char *str) @@ -1310,26 +1313,23 @@ static void host_x86_cpu_class_init(ObjectClass *oc, void *data) dc->props = host_x86_cpu_properties; } -static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w, - bool migratable_only); - static void host_x86_cpu_initfn(Object *obj) { X86CPU *cpu = X86_CPU(obj); CPUX86State *env = &cpu->env; KVMState *s = kvm_state; - FeatureWord w; assert(kvm_enabled()); + /* We can't fill the features array here because we don't know yet if + * "migratable" is true or false. + */ + cpu->host_features = true; + env->cpuid_level = kvm_arch_get_supported_cpuid(s, 0x0, 0, R_EAX); env->cpuid_xlevel = kvm_arch_get_supported_cpuid(s, 0x80000000, 0, R_EAX); env->cpuid_xlevel2 = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX); - for (w = 0; w < FEATURE_WORDS; w++) { - env->features[w] = - x86_cpu_get_supported_feature_word(w, cpu->migratable); - } object_property_set_bool(OBJECT(cpu), true, "pmu", &error_abort); } @@ -1828,6 +1828,13 @@ static void x86_cpu_parse_featurestr(CPUState *cs, char *features, featurestr = strtok(NULL, ","); } + if (cpu->host_features) { + for (w = 0; w < FEATURE_WORDS; w++) { + env->features[w] = + x86_cpu_get_supported_feature_word(w, cpu->migratable); + } + } + for (w = 0; w < FEATURE_WORDS; w++) { env->features[w] |= plus_features[w]; env->features[w] &= ~minus_features[w]; -- cgit v1.2.3