Messages in this thread Patch in this message | | | From | Juergen Gross <> | Subject | [PATCH] x86: correct saving and restoring of lapic vectors in suspend/resume | Date | Mon, 23 Nov 2015 11:59:24 +0100 |
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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> --- 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 2f69e3b..bc06c9d 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(); @@ -2355,10 +2360,14 @@ 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) +#if defined(CONFIG_X86_THERMAL_VECTOR) if (maxlvt >= 5) apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr); #endif +#if defined(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); apic_write(APIC_LVTT, apic_pm_state.apic_lvtt); -- 2.6.2
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