diff options
Diffstat (limited to 'target-i386/kvm.c')
| -rw-r--r-- | target-i386/kvm.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index e2f7e2ef4a..ae0a034ab0 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -15,6 +15,7 @@ #include <sys/types.h> #include <sys/ioctl.h> #include <sys/mman.h> +#include <sys/utsname.h> #include <linux/kvm.h> @@ -53,6 +54,8 @@ #define BUS_MCEERR_AO 5 #endif +static int lm_capable_kernel; + #ifdef KVM_CAP_EXT_CPUID static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) @@ -523,6 +526,11 @@ int kvm_arch_init(KVMState *s, int smp_cpus) { int ret; + struct utsname utsname; + + uname(&utsname); + lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; + /* create vm86 tss. KVM uses vm86 mode to emulate 16-bit code * directly. In order to use vm86 mode, a TSS is needed. Since this * must be part of guest physical memory, we need to allocate it. Older @@ -810,11 +818,12 @@ static int kvm_put_msrs(CPUState *env, int level) if (kvm_has_msr_hsave_pa(env)) kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); #ifdef TARGET_X86_64 - /* FIXME if lm capable */ - kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); - kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); - kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); - kvm_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar); + if (lm_capable_kernel) { + kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); + kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); + kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); + kvm_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar); + } #endif if (level == KVM_PUT_FULL_STATE) { /* @@ -1046,11 +1055,12 @@ static int kvm_get_msrs(CPUState *env) msrs[n++].index = MSR_VM_HSAVE_PA; msrs[n++].index = MSR_IA32_TSC; #ifdef TARGET_X86_64 - /* FIXME lm_capable_kernel */ - msrs[n++].index = MSR_CSTAR; - msrs[n++].index = MSR_KERNELGSBASE; - msrs[n++].index = MSR_FMASK; - msrs[n++].index = MSR_LSTAR; + if (lm_capable_kernel) { + msrs[n++].index = MSR_CSTAR; + msrs[n++].index = MSR_KERNELGSBASE; + msrs[n++].index = MSR_FMASK; + msrs[n++].index = MSR_LSTAR; + } #endif msrs[n++].index = MSR_KVM_SYSTEM_TIME; msrs[n++].index = MSR_KVM_WALL_CLOCK; |