diff --git a/qemu/target-i386/cpu.c b/qemu/target-i386/cpu.c index c8e474b5..039470cf 100644 --- a/qemu/target-i386/cpu.c +++ b/qemu/target-i386/cpu.c @@ -2579,6 +2579,8 @@ static void x86_cpu_reset(CPUState *s) X86CPUClass *xcc = X86_CPU_GET_CLASS(s->uc, cpu); CPUX86State *env = &cpu->env; int i; + target_ulong cr4; + uint64_t xcr0; xcc->parent_reset(s); @@ -2637,7 +2639,8 @@ 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; @@ -2648,7 +2651,24 @@ 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: