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x86/mce/AMD: Ensure the deferred error interrupt is of type APIC on SMCA systems

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The Deferred Error Interrupt Type is set per bank on Scalable MCA
systems. This is done in a bitfield in the MCA_CONFIG register of each
bank. We should set its type to APIC-based interrupt and not assume BIOS
has set it for us.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1472737486-1720-1-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Yazen Ghannam 2016-09-12 09:59:36 +02:00 committed by Thomas Gleixner
parent 87a6d4091b
commit 66ef269dbb
1 changed files with 14 additions and 0 deletions
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14
arch/x86/kernel/cpu/mcheck/mce_amd.c
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@ -463,6 +463,20 @@ prepare_threshold_block(unsigned int bank, unsigned int block, u32 addr,
*/
smca_high &= ~BIT(2);
/*
* SMCA sets the Deferred Error Interrupt type per bank.
*
* MCA_CONFIG[DeferredIntTypeSupported] is bit 5, and tells us
* if the DeferredIntType bit field is available.
*
* MCA_CONFIG[DeferredIntType] is bits [38:37] ([6:5] in the
* high portion of the MSR). OS should set this to 0x1 to enable
* APIC based interrupt. First, check that no interrupt has been
* set.
*/
if ((smca_low & BIT(5)) && !((smca_high >> 5) & 0x3))
smca_high |= BIT(5);
wrmsr(smca_addr, smca_low, smca_high);
}