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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/powerpc/include/asm/rtas.h
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@@ -1,21 +1,19 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 #ifndef _POWERPC_RTAS_H
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 #define _POWERPC_RTAS_H
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 #ifdef __KERNEL__
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 #include <linux/spinlock.h>
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 #include <asm/page.h>
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+#include <asm/rtas-types.h>
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 #include <linux/time.h>
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+#include <linux/cpumask.h>
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 /*
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  * Definitions for talking to the RTAS on CHRP machines.
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  *
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  * Copyright (C) 2001 Peter Bergner
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  * Copyright (C) 2001 PPC 64 Team, IBM Corp
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #define RTAS_UNKNOWN_SERVICE (-1)
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@@ -44,33 +42,6 @@
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  * may be safely used for one-shot calls to RTAS.
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  *
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  */
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-
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-typedef __be32 rtas_arg_t;
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-
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-struct rtas_args {
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-	__be32 token;
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-	__be32 nargs;
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-	__be32 nret; 
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-	rtas_arg_t args[16];
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-	rtas_arg_t *rets;     /* Pointer to return values in args[]. */
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-};  
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-
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-struct rtas_t {
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-	unsigned long entry;		/* physical address pointer */
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-	unsigned long base;		/* physical address pointer */
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-	unsigned long size;
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-	arch_spinlock_t lock;
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-	struct rtas_args args;
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-	struct device_node *dev;	/* virtual address pointer */
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-};
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-
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-struct rtas_suspend_me_data {
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-	atomic_t working; /* number of cpus accessing this struct */
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-	atomic_t done;
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-	int token; /* ibm,suspend-me */
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-	atomic_t error;
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-	struct completion *complete; /* wait on this until working == 0 */
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-};
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 /* RTAS event classes */
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 #define RTAS_INTERNAL_ERROR		0x80000000 /* set bit 0 */
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@@ -125,6 +96,7 @@
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 #define RTAS_TYPE_INFO			0xE2
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 #define RTAS_TYPE_DEALLOC		0xE3
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 #define RTAS_TYPE_DUMP			0xE4
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+#define RTAS_TYPE_HOTPLUG		0xE5
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 /* I don't add PowerMGM events right now, this is a different topic */ 
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 #define RTAS_TYPE_PMGM_POWER_SW_ON	0x60
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 #define RTAS_TYPE_PMGM_POWER_SW_OFF	0x61
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@@ -150,31 +122,6 @@
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 /* RTAS check-exception vector offset */
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 #define RTAS_VECTOR_EXTERNAL_INTERRUPT	0x500
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-struct rtas_error_log {
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-	/* Byte 0 */
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-	uint8_t		byte0;			/* Architectural version */
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-
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-	/* Byte 1 */
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-	uint8_t		byte1;
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-	/* XXXXXXXX
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-	 * XXX		3: Severity level of error
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-	 *    XX	2: Degree of recovery
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-	 *      X	1: Extended log present?
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-	 *       XX	2: Reserved
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-	 */
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-
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-	/* Byte 2 */
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-	uint8_t		byte2;
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-	/* XXXXXXXX
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-	 * XXXX		4: Initiator of event
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-	 *     XXXX	4: Target of failed operation
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-	 */
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-	uint8_t		byte3;			/* General event or error*/
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-	__be32		extended_log_length;	/* length in bytes */
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-	unsigned char	buffer[1];		/* Start of extended log */
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-						/* Variable length.      */
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-};
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-
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 static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog)
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 {
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 	return (elog->byte1 & 0xE0) >> 5;
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@@ -185,9 +132,21 @@
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 	return (elog->byte1 & 0x18) >> 3;
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 }
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+static inline
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+void rtas_set_disposition_recovered(struct rtas_error_log *elog)
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+{
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+	elog->byte1 &= ~0x18;
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+	elog->byte1 |= (RTAS_DISP_FULLY_RECOVERED << 3);
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+}
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+
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 static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog)
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 {
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 	return (elog->byte1 & 0x04) >> 2;
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+}
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+
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+static inline uint8_t rtas_error_initiator(const struct rtas_error_log *elog)
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+{
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+	return (elog->byte2 & 0xf0) >> 4;
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 }
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 #define rtas_error_type(x)	((x)->byte3)
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@@ -201,47 +160,6 @@
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 #define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG	14
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 #define RTAS_V6EXT_COMPANY_ID_IBM	(('I' << 24) | ('B' << 16) | ('M' << 8))
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-
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-/* RTAS general extended event log, Version 6. The extended log starts
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- * from "buffer" field of struct rtas_error_log defined above.
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- */
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-struct rtas_ext_event_log_v6 {
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-	/* Byte 0 */
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-	uint8_t byte0;
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-	/* XXXXXXXX
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-	 * X		1: Log valid
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-	 *  X		1: Unrecoverable error
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-	 *   X		1: Recoverable (correctable or successfully retried)
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-	 *    X		1: Bypassed unrecoverable error (degraded operation)
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-	 *     X	1: Predictive error
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-	 *      X	1: "New" log (always 1 for data returned from RTAS)
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-	 *       X	1: Big Endian
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-	 *        X	1: Reserved
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-	 */
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-
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-	/* Byte 1 */
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-	uint8_t byte1;			/* reserved */
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-
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-	/* Byte 2 */
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-	uint8_t byte2;
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-	/* XXXXXXXX
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-	 * X		1: Set to 1 (indicating log is in PowerPC format)
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-	 *  XXX		3: Reserved
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-	 *     XXXX	4: Log format used for bytes 12-2047
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-	 */
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-
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-	/* Byte 3 */
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-	uint8_t byte3;			/* reserved */
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-	/* Byte 4-11 */
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-	uint8_t reserved[8];		/* reserved */
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-	/* Byte 12-15 */
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-	__be32  company_id;		/* Company ID of the company	*/
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-					/* that defines the format for	*/
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-					/* the vendor specific log type	*/
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-	/* Byte 16-end of log */
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-	uint8_t vendor_log[1];		/* Start of vendor specific log	*/
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-					/* Variable length.		*/
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-};
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 static
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 inline uint8_t rtas_ext_event_log_format(struct rtas_ext_event_log_v6 *ext_log)
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@@ -275,16 +193,7 @@
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 #define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
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 #define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')
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 #define PSERIES_ELOG_SECT_ID_HOTPLUG		(('H' << 8) | 'P')
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-
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-/* Vendor specific Platform Event Log Format, Version 6, section header */
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-struct pseries_errorlog {
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-	__be16 id;			/* 0x00 2-byte ASCII section ID	*/
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-	__be16 length;			/* 0x02 Section length in bytes	*/
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-	uint8_t version;		/* 0x04 Section version		*/
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-	uint8_t subtype;		/* 0x05 Section subtype		*/
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-	__be16 creator_component;	/* 0x06 Creator component ID	*/
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-	uint8_t data[];			/* 0x08 Start of section data	*/
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-};
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+#define PSERIES_ELOG_SECT_ID_MCE		(('M' << 8) | 'C')
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 static
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 inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect)
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@@ -298,28 +207,14 @@
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 	return be16_to_cpu(sect->length);
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 }
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-/* RTAS pseries hotplug errorlog section */
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-struct pseries_hp_errorlog {
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-	u8	resource;
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-	u8	action;
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-	u8	id_type;
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-	u8	reserved;
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-	union {
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-		__be32	drc_index;
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-		__be32	drc_count;
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-		struct { __be32 count, index; } ic;
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-		char	drc_name[1];
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-	} _drc_u;
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-};
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-
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 #define PSERIES_HP_ELOG_RESOURCE_CPU	1
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 #define PSERIES_HP_ELOG_RESOURCE_MEM	2
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 #define PSERIES_HP_ELOG_RESOURCE_SLOT	3
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 #define PSERIES_HP_ELOG_RESOURCE_PHB	4
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+#define PSERIES_HP_ELOG_RESOURCE_PMEM   6
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 #define PSERIES_HP_ELOG_ACTION_ADD	1
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 #define PSERIES_HP_ELOG_ACTION_REMOVE	2
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-#define PSERIES_HP_ELOG_ACTION_READD	3
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 #define PSERIES_HP_ELOG_ID_DRC_NAME	1
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 #define PSERIES_HP_ELOG_ID_DRC_INDEX	2
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@@ -340,6 +235,7 @@
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 extern int rtas_token(const char *service);
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 extern int rtas_service_present(const char *service);
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 extern int rtas_call(int token, int, int, int *, ...);
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+int rtas_call_reentrant(int token, int nargs, int nret, int *outputs, ...);
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 void rtas_call_unlocked(struct rtas_args *args, int token, int nargs,
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 			int nret, ...);
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 extern void __noreturn rtas_restart(char *cmd);
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@@ -356,8 +252,6 @@
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 extern void rtas_progress(char *s, unsigned short hex);
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 extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
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 extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
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-extern int rtas_online_cpus_mask(cpumask_var_t cpus);
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-extern int rtas_offline_cpus_mask(cpumask_var_t cpus);
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 extern int rtas_ibm_suspend_me(u64 handle);
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 struct rtc_time;
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@@ -471,5 +365,11 @@
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 extern int call_rtas(const char *, int, int, unsigned long *, ...);
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+#ifdef CONFIG_HV_PERF_CTRS
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+void read_24x7_sys_info(void);
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+#else
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+static inline void read_24x7_sys_info(void) { }
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+#endif
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+
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 #endif /* __KERNEL__ */
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 #endif /* _POWERPC_RTAS_H */