diff options
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 3196961862bc..d43382284ada 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -167,7 +167,6 @@ xen_running_on_version_or_later(unsigned int major, unsigned int minor) static __read_mostly unsigned int cpuid_leaf1_ecx_mask = ~0; -static __read_mostly unsigned int cpuid_leaf1_ecx_set_mask; static __read_mostly unsigned int cpuid_leaf5_ecx_val; static __read_mostly unsigned int cpuid_leaf5_edx_val; @@ -176,7 +175,6 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx, { unsigned maskebx = ~0; unsigned maskecx = ~0; - unsigned setecx = 0; /* * Mask out inconvenient features, to try and disable as many * unsupported kernel subsystems as possible. @@ -184,7 +182,6 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx, switch (*ax) { case 1: maskecx = cpuid_leaf1_ecx_mask; - setecx = cpuid_leaf1_ecx_set_mask; break; case CPUID_MWAIT_LEAF: @@ -210,7 +207,6 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx, *bx &= maskebx; *cx &= maskecx; - *cx |= setecx; } STACK_FRAME_NON_STANDARD(xen_cpuid); /* XEN_EMULATE_PREFIX */ @@ -303,8 +299,6 @@ static void __init xen_init_cpuid_mask(void) /* Xen will set CR4.OSXSAVE if supported and not disabled by force */ if ((cx & xsave_mask) != xsave_mask) cpuid_leaf1_ecx_mask &= ~xsave_mask; /* disable XSAVE & OSXSAVE */ - if (xen_check_mwait()) - cpuid_leaf1_ecx_set_mask = (1 << (X86_FEATURE_MWAIT % 32)); } static void __init xen_init_capabilities(void) @@ -318,6 +312,11 @@ static void __init xen_init_capabilities(void) if (!xen_initial_domain()) setup_clear_cpu_cap(X86_FEATURE_ACPI); + + if (xen_check_mwait()) + setup_force_cpu_cap(X86_FEATURE_MWAIT); + else + setup_clear_cpu_cap(X86_FEATURE_MWAIT); } static void xen_set_debugreg(int reg, unsigned long val) |