diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-15 16:07:04 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-21 18:02:08 +0200 |
| commit | b98dbc90950cd4e43ab9b4f8300dbeae6cf8c8cb (patch) | |
| tree | 5ccd530f79ccd636d971e6e0336e090ad0afdfa6 /target-i386/seg_helper.c | |
| parent | 87446327ccb2e944fe7abc848bab798a0864eb03 (diff) | |
target-i386: fix segment flags for SMM and VM86 mode
With the next patch, these need to be correct or VM86 tasks
have the wrong CPL. The flags are basically what the Intel VMX
documentation say is mandatory for entry into a VM86 guest.
For consistency, SMM ought to have the same flags except with
CPL=0.
Tested-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386/seg_helper.c')
| -rw-r--r-- | target-i386/seg_helper.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/target-i386/seg_helper.c b/target-i386/seg_helper.c index cc7eadf9e2..6f7efeeaa0 100644 --- a/target-i386/seg_helper.c +++ b/target-i386/seg_helper.c @@ -88,8 +88,10 @@ static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, static inline void load_seg_vm(CPUX86State *env, int seg, int selector) { selector &= 0xffff; - cpu_x86_load_seg_cache(env, seg, selector, - (selector << 4), 0xffff, 0); + + cpu_x86_load_seg_cache(env, seg, selector, (selector << 4), 0xffff, + DESC_P_MASK | DESC_S_MASK | DESC_W_MASK | + DESC_A_MASK | (3 << DESC_DPL_SHIFT)); } static inline void get_ss_esp_from_tss(CPUX86State *env, uint32_t *ss_ptr, @@ -2465,9 +2467,12 @@ void helper_verw(CPUX86State *env, target_ulong selector1) void cpu_x86_load_seg(CPUX86State *env, int seg_reg, int selector) { if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { + int dpl = (env->eflags & VM_MASK) ? 3 : 0; selector &= 0xffff; cpu_x86_load_seg_cache(env, seg_reg, selector, - (selector << 4), 0xffff, 0); + (selector << 4), 0xffff, + DESC_P_MASK | DESC_S_MASK | DESC_W_MASK | + DESC_A_MASK | (dpl << DESC_DPL_SHIFT)); } else { helper_load_seg(env, seg_reg, selector); } |