Commit 0f54bdde authored by Ganesh Goudar's avatar Ganesh Goudar Committed by Michael Ellerman
Browse files

powerpc/pseries: Parse control memory access error 



Add support to parse and log control memory access
error for pseries. These changes are made according to
PAPR v2.11 10.3.2.2.12.

Signed-off-by: default avatarGanesh Goudar <ganeshgr@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220107141428.67862-1-ganeshgr@linux.ibm.com
parent 49c3af43

arch/powerpc/platforms/pseries/ras.c

+32 −4
Original line number Diff line number Diff line
@@ -60,11 +60,17 @@ struct pseries_mc_errorlog { 
	 *      XX	2: Reserved.

	 *        XXX	3: Type of UE error.

	 *

	 * For error_type != MC_ERROR_TYPE_UE

	 * For error_type == MC_ERROR_TYPE_SLB/ERAT/TLB

	 *   XXXXXXXX

	 *   X		1: Effective address provided.

	 *    XXXXX	5: Reserved.

	 *         XX	2: Type of SLB/ERAT/TLB error.

	 *

	 * For error_type == MC_ERROR_TYPE_CTRL_MEM_ACCESS

	 *   XXXXXXXX

	 *   X		1: Error causing address provided.

	 *    XXX	3: Type of error.

	 *       XXXX	4: Reserved.

	 */

	u8	sub_err_type;

	u8	reserved_1[6];
@@ -80,6 +86,7 @@ struct pseries_mc_errorlog { 
#define MC_ERROR_TYPE_TLB		0x04

#define MC_ERROR_TYPE_D_CACHE		0x05

#define MC_ERROR_TYPE_I_CACHE		0x07

#define MC_ERROR_TYPE_CTRL_MEM_ACCESS	0x08



/* RTAS pseries MCE error sub types */

#define MC_ERROR_UE_INDETERMINATE		0
@@ -90,6 +97,7 @@ struct pseries_mc_errorlog { 


#define UE_EFFECTIVE_ADDR_PROVIDED		0x40

#define UE_LOGICAL_ADDR_PROVIDED		0x20

#define MC_EFFECTIVE_ADDR_PROVIDED		0x80



#define MC_ERROR_SLB_PARITY		0

#define MC_ERROR_SLB_MULTIHIT		1
@@ -103,6 +111,9 @@ struct pseries_mc_errorlog { 
#define MC_ERROR_TLB_MULTIHIT		2

#define MC_ERROR_TLB_INDETERMINATE	3



#define MC_ERROR_CTRL_MEM_ACCESS_PTABLE_WALK	0

#define MC_ERROR_CTRL_MEM_ACCESS_OP_ACCESS	1



static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog)

{

	switch (mlog->error_type) {
@@ -112,6 +123,8 @@ static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog) 
	case	MC_ERROR_TYPE_ERAT:

	case	MC_ERROR_TYPE_TLB:

		return (mlog->sub_err_type & 0x03);

	case	MC_ERROR_TYPE_CTRL_MEM_ACCESS:

		return (mlog->sub_err_type & 0x70) >> 4;

	default:

		return 0;

	}
@@ -658,7 +671,7 @@ static int mce_handle_err_virtmode(struct pt_regs *regs, 
			mce_err.u.slb_error_type = MCE_SLB_ERROR_INDETERMINATE;

			break;

		}

		if (mce_log->sub_err_type & 0x80)

		if (mce_log->sub_err_type & MC_EFFECTIVE_ADDR_PROVIDED)

			eaddr = be64_to_cpu(mce_log->effective_address);

		break;

	case MC_ERROR_TYPE_ERAT:
@@ -675,7 +688,7 @@ static int mce_handle_err_virtmode(struct pt_regs *regs, 
			mce_err.u.erat_error_type = MCE_ERAT_ERROR_INDETERMINATE;

			break;

		}

		if (mce_log->sub_err_type & 0x80)

		if (mce_log->sub_err_type & MC_EFFECTIVE_ADDR_PROVIDED)

			eaddr = be64_to_cpu(mce_log->effective_address);

		break;

	case MC_ERROR_TYPE_TLB:
@@ -692,7 +705,7 @@ static int mce_handle_err_virtmode(struct pt_regs *regs, 
			mce_err.u.tlb_error_type = MCE_TLB_ERROR_INDETERMINATE;

			break;

		}

		if (mce_log->sub_err_type & 0x80)

		if (mce_log->sub_err_type & MC_EFFECTIVE_ADDR_PROVIDED)

			eaddr = be64_to_cpu(mce_log->effective_address);

		break;

	case MC_ERROR_TYPE_D_CACHE:
@@ -701,6 +714,21 @@ static int mce_handle_err_virtmode(struct pt_regs *regs, 
	case MC_ERROR_TYPE_I_CACHE:

		mce_err.error_type = MCE_ERROR_TYPE_ICACHE;

		break;

	case MC_ERROR_TYPE_CTRL_MEM_ACCESS:

		mce_err.error_type = MCE_ERROR_TYPE_RA;

		switch (err_sub_type) {

		case MC_ERROR_CTRL_MEM_ACCESS_PTABLE_WALK:

			mce_err.u.ra_error_type =

				MCE_RA_ERROR_PAGE_TABLE_WALK_LOAD_STORE_FOREIGN;

			break;

		case MC_ERROR_CTRL_MEM_ACCESS_OP_ACCESS:

			mce_err.u.ra_error_type =

				MCE_RA_ERROR_LOAD_STORE_FOREIGN;

			break;

		}

		if (mce_log->sub_err_type & MC_EFFECTIVE_ADDR_PROVIDED)

			eaddr = be64_to_cpu(mce_log->effective_address);

		break;

	case MC_ERROR_TYPE_UNKNOWN:

	default:

		mce_err.error_type = MCE_ERROR_TYPE_UNKNOWN;