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Commit 88921be3 authored by Andi Kleen's avatar Andi Kleen Committed by H. Peter Anvin
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x86, mce: synchronize core after machine check handling 



The example code in the IA32 SDM recommends to synchronize the CPU
after machine check handling. So do that here.

[ Impact: Spec compliance ]

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 5706001a

arch/x86/kernel/cpu/mcheck/mce.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -328,6 +328,8 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) 
	 * Don't clear MCG_STATUS here because it's only defined for

	 * Don't clear MCG_STATUS here because it's only defined for

	 * exceptions.

	 * exceptions.

	 */

	 */



	sync_core();

}

}

EXPORT_SYMBOL_GPL(machine_check_poll);

EXPORT_SYMBOL_GPL(machine_check_poll);
@@ -501,6 +503,7 @@ void do_machine_check(struct pt_regs *regs, long error_code) 
	mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);

	mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);

 out2:

 out2:

	atomic_dec(&mce_entry);

	atomic_dec(&mce_entry);

	sync_core();

}

}

EXPORT_SYMBOL_GPL(do_machine_check);

EXPORT_SYMBOL_GPL(do_machine_check);