[PATCH 01/31] x86: MCE: Synchronize core after machine check handling

Andi Kleen
2009-05-26T23:55:00Z

Impact: Spec compliance

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

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/mcheck/mce.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 87f8198..249e3cf 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -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
* exceptions.
*/
+
+ sync_core();
}
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);
out2:
atomic_dec(&mce_entry);
+ sync_core();
}
EXPORT_SYMBOL_GPL(do_machine_check);

--
1.6.0.2