diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2014-05-14 16:30:09 -0300 |
|---|---|---|
| committer | Andreas Färber <afaerber@suse.de> | 2014-06-25 23:54:57 +0200 |
| commit | 68bfd0ad4a1dcc4c328d5db85dc746b49c1ec07e (patch) | |
| tree | 9bfda4de66b4b6a265168fb3c1a278e046707617 /target-i386/kvm.c | |
| parent | 7d854c471a2180037b49547e31bd940166513657 (diff) | |
target-i386: block migration and savevm if invariant tsc is exposed
Invariant TSC documentation mentions that "invariant TSC will run at a
constant rate in all ACPI P-, C-. and T-states".
This is not the case if migration to a host with different TSC frequency
is allowed, or if savevm is performed. So block migration/savevm.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[AF+mtosatti: Updated error message]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'target-i386/kvm.c')
| -rw-r--r-- | target-i386/kvm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 4bf0ac9e76..097fe1188d 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -35,6 +35,8 @@ #include "exec/ioport.h" #include <asm/hyperv.h> #include "hw/pci/pci.h" +#include "migration/migration.h" +#include "qapi/qmp/qerror.h" //#define DEBUG_KVM @@ -448,6 +450,8 @@ static bool hyperv_enabled(X86CPU *cpu) cpu->hyperv_relaxed_timing); } +static Error *invtsc_mig_blocker; + #define KVM_MAX_CPUID_ENTRIES 100 int kvm_arch_init_vcpu(CPUState *cs) @@ -705,6 +709,17 @@ int kvm_arch_init_vcpu(CPUState *cs) !!(c->ecx & CPUID_EXT_SMX); } + c = cpuid_find_entry(&cpuid_data.cpuid, 0x80000007, 0); + if (c && (c->edx & 1<<8) && invtsc_mig_blocker == NULL) { + /* for migration */ + error_setg(&invtsc_mig_blocker, + "State blocked by non-migratable CPU device" + " (invtsc flag)"); + migrate_add_blocker(invtsc_mig_blocker); + /* for savevm */ + vmstate_x86_cpu.unmigratable = 1; + } + cpuid_data.cpuid.padding = 0; r = kvm_vcpu_ioctl(cs, KVM_SET_CPUID2, &cpuid_data); if (r) { |