diff options
| author | Richard Henderson <rth@twiddle.net> | 2015-07-07 16:13:10 +0100 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-02-15 14:50:00 +1100 |
| commit | a114d25d5b42600871d75929604c0b9fcc448ec0 (patch) | |
| tree | a2982ab534dfbfad136336876c8042fcec3a5184 /target-i386 | |
| parent | 7d117ce81ef6258cdcc0d24c774d045fa4b5fd26 (diff) | |
target-i386: Enable CR4/XCR0 features for user-mode
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/cpu.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 4682166ccd..063c8fb337 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -2643,6 +2643,8 @@ static void x86_cpu_reset(CPUState *s) X86CPU *cpu = X86_CPU(s); X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu); CPUX86State *env = &cpu->env; + target_ulong cr4; + uint64_t xcr0; int i; xcc->parent_reset(s); @@ -2702,7 +2704,8 @@ static void x86_cpu_reset(CPUState *s) cpu_set_fpuc(env, 0x37f); env->mxcsr = 0x1f80; - env->xstate_bv = XSTATE_FP | XSTATE_SSE; + /* All units are in INIT state. */ + env->xstate_bv = 0; env->pat = 0x0007040600070406ULL; env->msr_ia32_misc_enable = MSR_IA32_MISC_ENABLE_DEFAULT; @@ -2713,7 +2716,24 @@ static void x86_cpu_reset(CPUState *s) cpu_breakpoint_remove_all(s, BP_CPU); cpu_watchpoint_remove_all(s, BP_CPU); - env->xcr0 = 1; + cr4 = 0; + xcr0 = XSTATE_FP; + +#ifdef CONFIG_USER_ONLY + /* Enable all the features for user-mode. */ + if (env->features[FEAT_1_EDX] & CPUID_SSE) { + xcr0 |= XSTATE_SSE; + } + if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_MPX) { + xcr0 |= XSTATE_BNDREGS | XSTATE_BNDCSR; + } + if (env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) { + cr4 |= CR4_OSFXSR_MASK | CR4_OSXSAVE_MASK; + } +#endif + + env->xcr0 = xcr0; + cpu_x86_update_cr4(env, cr4); /* * SDM 11.11.5 requires: |