diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-03-12 13:16:28 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-13 13:12:40 +0200 |
| commit | 43175fa96add507afee6c0a83ec9ffe0ca130fc3 (patch) | |
| tree | 3b720e0bcd3c0d806f0276bf8e38f9943bb38ee2 /target-i386/cpu.c | |
| parent | 05e7e819d7d159a75a46354aead95e1199b8f168 (diff) | |
target-i386: preserve FPU and MSR state on INIT
Most MSRs, plus the FPU, MMX, MXCSR, XMM and YMM registers should not
be zeroed on INIT (Table 9-1 in the Intel SDM). Copy them out of
CPUX86State and back in, instead of special casing env->pat.
The relevant fields are already consecutive except PAT and SMBASE.
However:
- KVM and Hyper-V MSRs should be reset because they include memory
locations written by the hypervisor. These MSRs are moved together
at the end of the preserved area.
- SVM state can be moved out of the way since it is written by VMRUN.
Cc: Andreas Faerber <afaerber@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386/cpu.c')
| -rw-r--r-- | target-i386/cpu.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 79b1bb92f0..042a48d703 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -2418,8 +2418,7 @@ static void x86_cpu_reset(CPUState *s) xcc->parent_reset(s); - - memset(env, 0, offsetof(CPUX86State, pat)); + memset(env, 0, offsetof(CPUX86State, cpuid_level)); tlb_flush(s, 1); |