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| author | Keir Fraser <keir@xen.org> | 2011-02-10 14:14:24 +0000 |
|---|---|---|
| committer | Keir Fraser <keir@xen.org> | 2011-02-10 14:14:24 +0000 |
| commit | 8ad67c8e05b9dec349d8cc0a72acdb872f39dd0d (patch) | |
| tree | c335cadf7db832a3eba837a36c43c0f631020043 /xen/arch/x86/genapic | |
| parent | 1146a5b6396ba4c3995d1e99609c5ef517c73841 (diff) | |
| download | xen-8ad67c8e05b9dec349d8cc0a72acdb872f39dd0d.tar.gz xen-8ad67c8e05b9dec349d8cc0a72acdb872f39dd0d.tar.bz2 xen-8ad67c8e05b9dec349d8cc0a72acdb872f39dd0d.zip | |
ix86: re-do permanent disabling of x2apic
Move logic into check_x2apic_preenabled() (to make sure
generic_apic_probe() doesn't see genapic already set).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/arch/x86/genapic')
| -rw-r--r-- | xen/arch/x86/genapic/x2apic.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/xen/arch/x86/genapic/x2apic.c b/xen/arch/x86/genapic/x2apic.c index 7cf8989947..acc6a026df 100644 --- a/xen/arch/x86/genapic/x2apic.c +++ b/xen/arch/x86/genapic/x2apic.c @@ -138,7 +138,19 @@ void __init check_x2apic_preenabled(void) if ( lo & MSR_IA32_APICBASE_EXTD ) { printk("x2APIC mode is already enabled by BIOS.\n"); +#ifndef __i386__ x2apic_enabled = 1; genapic = apic_x2apic_probe(); +#else + lo &= ~(MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD); + wrmsr(MSR_IA32_APICBASE, lo, hi); + lo |= MSR_IA32_APICBASE_ENABLE; + wrmsr(MSR_IA32_APICBASE, lo, hi); + printk("x2APIC disabled permanently on x86_32.\n"); +#endif } + +#ifdef __i386__ + clear_bit(X86_FEATURE_X2APIC, boot_cpu_data.x86_capability); +#endif } |