powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power8.

This patch handles the memory errors on power8. If we get a machine check
exception due to SLB or TLB errors, then flush SLBs/TLBs and reload SLBs to
recover.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c54188bcdd9e..6c8dd5da4de5 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -74,6 +74,7 @@ extern void __restore_cpu_a2(void);
 extern void __flush_tlb_power7(unsigned long inval_selector);
 extern void __flush_tlb_power8(unsigned long inval_selector);
 extern long __machine_check_early_realmode_p7(struct pt_regs *regs);
+extern long __machine_check_early_realmode_p8(struct pt_regs *regs);
 #endif /* CONFIG_PPC64 */
 #if defined(CONFIG_E500)
 extern void __setup_cpu_e5500(unsigned long offset, struct cpu_spec* spec);
@@ -462,6 +463,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_setup              = __setup_cpu_power8,
                 .cpu_restore            = __restore_cpu_power8,
                 .flush_tlb              = __flush_tlb_power8,
+                .machine_check_early    = __machine_check_early_realmode_p8,
                 .platform               = "power8",
         },
         {       /* Power7 */
@@ -521,6 +523,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_setup              = __setup_cpu_power8,
                 .cpu_restore            = __restore_cpu_power8,
                 .flush_tlb              = __flush_tlb_power8,
+                .machine_check_early    = __machine_check_early_realmode_p8,
                 .platform               = "power8",
         },
         {       /* Power8 */
@@ -540,6 +543,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_setup              = __setup_cpu_power8,
                 .cpu_restore            = __restore_cpu_power8,
                 .flush_tlb              = __flush_tlb_power8,
+                .machine_check_early    = __machine_check_early_realmode_p8,
                 .platform               = "power8",
         },
         {       /* Cell Broadband Engine */