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x86/apic: Fix the saving and restoring of lapic vectors during suspend/resume 

Saving and restoring lapic vectors in lapic_suspend() and
lapic_resume() is not consistent: the thmr vector saving is
guarded by a different config option than the restore part. The
cmci vector isn't handled at all.

Those inconsistencies are not very critical, as the missing cmci
vector will be set via mce resume handling, the wrong config
option used for restoring the thmr vector can't be configured
differently than the one which should be used.

Nevertheless correct the thmr vector restore and add cmci vector
handling.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1448276364-31334-1-git-send-email-jgross@suse.com
[ Minor code edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Juergen Gross 2015-11-23 11:59:24 +01:00 committed by Ingo Molnar
parent 2fde46b79e
commit 42baa2581c
1 changed files with 10 additions and 1 deletions
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11
arch/x86/kernel/apic/apic.c
View File

@ -2270,6 +2270,7 @@ static struct {
unsigned int apic_tmict;
unsigned int apic_tdcr;
unsigned int apic_thmr;
unsigned int apic_cmci;
} apic_pm_state;
static int lapic_suspend(void)
@ -2299,6 +2300,10 @@ static int lapic_suspend(void)
if (maxlvt >= 5)
apic_pm_state.apic_thmr = apic_read(APIC_LVTTHMR);
#endif
#ifdef CONFIG_X86_MCE_INTEL
if (maxlvt >= 6)
apic_pm_state.apic_cmci = apic_read(APIC_LVTCMCI);
#endif
local_irq_save(flags);
disable_local_APIC();
@ -2355,9 +2360,13 @@ static void lapic_resume(void)
apic_write(APIC_SPIV, apic_pm_state.apic_spiv);
apic_write(APIC_LVT0, apic_pm_state.apic_lvt0);
apic_write(APIC_LVT1, apic_pm_state.apic_lvt1);
#if defined(CONFIG_X86_MCE_INTEL)
#ifdef CONFIG_X86_THERMAL_VECTOR
if (maxlvt >= 5)
apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr);
#endif
#ifdef CONFIG_X86_MCE_INTEL
if (maxlvt >= 6)
apic_write(APIC_LVTCMCI, apic_pm_state.apic_cmci);
#endif
if (maxlvt >= 4)
apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);