From 42baa2581c92f8d07e7260506c8d41caf14b0fc3 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Mon, 23 Nov 2015 11:59:24 +0100 Subject: [PATCH] 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 Acked-by: Borislav Petkov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1448276364-31334-1-git-send-email-jgross@suse.com [ Minor code edits. ] Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/apic.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 2f69e3b184f6..8d7df7478d84 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -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); -- 2.20.1