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authorKevin O'Connor <kevin@koconnor.net>2014-04-29 16:38:59 -0400
committerPaolo Bonzini <pbonzini@redhat.com>2014-05-13 13:12:40 +0200
commit7848c8d19f8556666df25044bbd5d8b29439c368 (patch)
tree250b284ca81228ae073c19938cfefde8a008a26c /target-i386/cpu.h
parentfd460606fd6f356ddcf424558ed67664e8d46eb4 (diff)
target-i386: the x86 CPL is stored in CS.selector - auto update hflags accordingly.
Instead of manually calling cpu_x86_set_cpl() when the CPL changes, check for CPL changes on calls to cpu_x86_load_seg_cache(R_CS). Every location that called cpu_x86_set_cpl() also called cpu_x86_load_seg_cache(R_CS), so cpu_x86_set_cpl() is no longer required. This fixes the SMM handler code as it was not setting/restoring the CPL level manually. Signed-off-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386/cpu.h')
-rw-r--r--target-i386/cpu.h25
1 files changed, 12 insertions, 13 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 2a22a7d64e..cae3a1e85f 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -124,9 +124,9 @@
#define ID_MASK 0x00200000
/* hidden flags - used internally by qemu to represent additional cpu
- states. Only the CPL, INHIBIT_IRQ, SMM and SVMI are not
- redundant. We avoid using the IOPL_MASK, TF_MASK, VM_MASK and AC_MASK
- bit positions to ease oring with eflags. */
+ states. Only the INHIBIT_IRQ, SMM and SVMI are not redundant. We
+ avoid using the IOPL_MASK, TF_MASK, VM_MASK and AC_MASK bit
+ positions to ease oring with eflags. */
/* current cpl */
#define HF_CPL_SHIFT 0
/* true if soft mmu is being used */
@@ -974,6 +974,7 @@ static inline void cpu_x86_load_seg_cache(CPUX86State *env,
/* update the hidden flags */
{
if (seg_reg == R_CS) {
+ int cpl = selector & 3;
#ifdef TARGET_X86_64
if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
/* long mode */
@@ -983,11 +984,19 @@ static inline void cpu_x86_load_seg_cache(CPUX86State *env,
#endif
{
/* legacy / compatibility case */
+ if (!(env->cr[0] & CR0_PE_MASK))
+ cpl = 0;
+ else if (env->eflags & VM_MASK)
+ cpl = 3;
new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_CS32_SHIFT);
env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
new_hflags;
}
+#if HF_CPL_MASK != 3
+#error HF_CPL_MASK is hardcoded
+#endif
+ env->hflags = (env->hflags & ~HF_CPL_MASK) | cpl;
}
new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_SS32_SHIFT);
@@ -1031,16 +1040,6 @@ int cpu_x86_get_descr_debug(CPUX86State *env, unsigned int selector,
target_ulong *base, unsigned int *limit,
unsigned int *flags);
-/* wrapper, just in case memory mappings must be changed */
-static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
-{
-#if HF_CPL_MASK == 3
- s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
-#else
-#error HF_CPL_MASK is hardcoded
-#endif
-}
-
/* op_helper.c */
/* used for debug or cpu save/restore */
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, floatx80 f);