diff options
| author | Richard Henderson <rth@twiddle.net> | 2015-07-02 14:53:40 +0100 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-02-13 07:59:59 +1100 |
| commit | 19dc85dba23c0db1ca932c62e453c37e00761628 (patch) | |
| tree | 9ac16b50d5d1b11c9533c6a85e336c1274d1ba38 /target-i386/helper.c | |
| parent | 121f3157887f92268a3d6169e2d4601f9292020b (diff) | |
| download | qemu-19dc85dba23c0db1ca932c62e453c37e00761628.tar.gz | |
target-i386: Add XSAVE extension
This includes XSAVE, XRSTOR, XGETBV, XSETBV, which are all related,
as well as the associate cpuid bits.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386/helper.c')
| -rw-r--r-- | target-i386/helper.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/target-i386/helper.c b/target-i386/helper.c index 3802ed9359..618bcff695 100644 --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -647,6 +647,7 @@ void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3) void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4) { X86CPU *cpu = x86_env_get_cpu(env); + uint32_t hflags; #if defined(DEBUG_MMU) printf("CR4 update: CR4=%08x\n", (uint32_t)env->cr[4]); @@ -656,24 +657,27 @@ void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4) CR4_SMEP_MASK | CR4_SMAP_MASK)) { tlb_flush(CPU(cpu), 1); } + + /* Clear bits we're going to recompute. */ + hflags = env->hflags & ~(HF_OSFXSR_MASK | HF_SMAP_MASK); + /* SSE handling */ if (!(env->features[FEAT_1_EDX] & CPUID_SSE)) { new_cr4 &= ~CR4_OSFXSR_MASK; } - env->hflags &= ~HF_OSFXSR_MASK; if (new_cr4 & CR4_OSFXSR_MASK) { - env->hflags |= HF_OSFXSR_MASK; + hflags |= HF_OSFXSR_MASK; } if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_SMAP)) { new_cr4 &= ~CR4_SMAP_MASK; } - env->hflags &= ~HF_SMAP_MASK; if (new_cr4 & CR4_SMAP_MASK) { - env->hflags |= HF_SMAP_MASK; + hflags |= HF_SMAP_MASK; } env->cr[4] = new_cr4; + env->hflags = hflags; } #if defined(CONFIG_USER_ONLY) |