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

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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>
This commit is contained in:
Mahesh Salgaonkar
2013-10-30 20:05:26 +05:30
committed by Benjamin Herrenschmidt
parent e22a22740c
commit ae744f3432
3 changed files with 41 additions and 0 deletions
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4
arch/powerpc/kernel/cputable.c
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@@ -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 */