linux/arch/powerpc/include/asm/mce.h
Mahesh Salgaonkar e22a22740c powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7.
If we get a machine check exception due to SLB or TLB errors, then flush
SLBs/TLBs and reload SLBs to recover. We do this in real mode before turning
on MMU. Otherwise we would run into nested machine checks.

If we get a machine check when we are in guest, then just flush the
SLBs and continue. This patch handles errors for power7. The next
patch will handle errors for power8

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-12-05 16:04:39 +11:00

68 lines
2.6 KiB
C

/*
* Machine check exception header file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright 2013 IBM Corporation
* Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
*/
#ifndef __ASM_PPC64_MCE_H__
#define __ASM_PPC64_MCE_H__
#include <linux/bitops.h>
/*
* Machine Check bits on power7 and power8
*/
#define P7_SRR1_MC_LOADSTORE(srr1) ((srr1) & PPC_BIT(42)) /* P8 too */
/* SRR1 bits for machine check (On Power7 and Power8) */
#define P7_SRR1_MC_IFETCH(srr1) ((srr1) & PPC_BITMASK(43, 45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_UE (0x1 << PPC_BITLSHIFT(45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_SLB_PARITY (0x2 << PPC_BITLSHIFT(45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_SLB_MULTIHIT (0x3 << PPC_BITLSHIFT(45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_SLB_BOTH (0x4 << PPC_BITLSHIFT(45))
#define P7_SRR1_MC_IFETCH_TLB_MULTIHIT (0x5 << PPC_BITLSHIFT(45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_UE_TLB_RELOAD (0x6 << PPC_BITLSHIFT(45)) /* P8 too */
#define P7_SRR1_MC_IFETCH_UE_IFU_INTERNAL (0x7 << PPC_BITLSHIFT(45))
/* SRR1 bits for machine check (On Power8) */
#define P8_SRR1_MC_IFETCH_ERAT_MULTIHIT (0x4 << PPC_BITLSHIFT(45))
/* DSISR bits for machine check (On Power7 and Power8) */
#define P7_DSISR_MC_UE (PPC_BIT(48)) /* P8 too */
#define P7_DSISR_MC_UE_TABLEWALK (PPC_BIT(49)) /* P8 too */
#define P7_DSISR_MC_ERAT_MULTIHIT (PPC_BIT(52)) /* P8 too */
#define P7_DSISR_MC_TLB_MULTIHIT_MFTLB (PPC_BIT(53)) /* P8 too */
#define P7_DSISR_MC_SLB_PARITY_MFSLB (PPC_BIT(55)) /* P8 too */
#define P7_DSISR_MC_SLB_MULTIHIT (PPC_BIT(56)) /* P8 too */
#define P7_DSISR_MC_SLB_MULTIHIT_PARITY (PPC_BIT(57)) /* P8 too */
/*
* DSISR bits for machine check (Power8) in addition to above.
* Secondary DERAT Multihit
*/
#define P8_DSISR_MC_ERAT_MULTIHIT_SEC (PPC_BIT(54))
/* SLB error bits */
#define P7_DSISR_MC_SLB_ERRORS (P7_DSISR_MC_ERAT_MULTIHIT | \
P7_DSISR_MC_SLB_PARITY_MFSLB | \
P7_DSISR_MC_SLB_MULTIHIT | \
P7_DSISR_MC_SLB_MULTIHIT_PARITY)
#endif /* __ASM_PPC64_MCE_H__ */