diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2014-03-28 11:43:45 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-06-05 16:10:34 +0200 |
| commit | 8a201bd47e4724c5783033aedbdd126a5df7a251 (patch) | |
| tree | 1f4d90bf910f1eea3544286c076a0f5deddcaf86 /target-i386/cpu.h | |
| parent | 81cf8d8adc64203567e03326c13ea4abec9fe5df (diff) | |
target-i386: fix kernel accesses with SMAP and CPL = 3
With SMAP, implicit kernel accesses from user mode always behave as
if AC=0. To do this, kernel mode is not anymore a separate MMU mode.
Instead, KERNEL_IDX is renamed to KSMAP_IDX and the kernel mode accessors
wrap KSMAP_IDX and KNOSMAP_IDX.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386/cpu.h')
| -rw-r--r-- | target-i386/cpu.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index f88b675a7a..b80df664a1 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -1153,17 +1153,24 @@ static inline CPUX86State *cpu_init(const char *cpu_model) #define cpudef_setup x86_cpudef_setup /* MMU modes definitions */ -#define MMU_MODE0_SUFFIX _kernel +#define MMU_MODE0_SUFFIX _ksmap #define MMU_MODE1_SUFFIX _user #define MMU_MODE2_SUFFIX _knosmap /* SMAP disabled or CPL<3 && AC=1 */ -#define MMU_KERNEL_IDX 0 +#define MMU_KSMAP_IDX 0 #define MMU_USER_IDX 1 #define MMU_KNOSMAP_IDX 2 -static inline int cpu_mmu_index (CPUX86State *env) +static inline int cpu_mmu_index(CPUX86State *env) { return (env->hflags & HF_CPL_MASK) == 3 ? MMU_USER_IDX : ((env->hflags & HF_SMAP_MASK) && (env->eflags & AC_MASK)) - ? MMU_KNOSMAP_IDX : MMU_KERNEL_IDX; + ? MMU_KNOSMAP_IDX : MMU_KSMAP_IDX; +} + +static inline int cpu_mmu_index_kernel(CPUX86State *env) +{ + return !(env->hflags & HF_SMAP_MASK) ? MMU_KNOSMAP_IDX : + ((env->hflags & HF_CPL_MASK) < 3 && (env->eflags & AC_MASK)) + ? MMU_KNOSMAP_IDX : MMU_KSMAP_IDX; } #define CC_DST (env->cc_dst) |