Liu, Jinsong
2010-Aug-20 14:41 UTC
[Xen-devel] [PATCH 1/2] Implement APEI ERST feature to Xen
Implement APEI ERST feature to Xen
APEI are ACPI4.0 new features. It consists of ERST, BERT, HEST, and EINJ.
ERST is used to save fault error log to a platform persistent storage,
so that when reboot os can retrieve the error log and handle it.
This patch is used to implement ERST feature to Xen.
It consists of 3-level hierarchy: operation level, action level, and instruction
level.
Instruction do basic io; Action done by sequential instructions parsed from ACPI
ERST table;
Operation done by sequential actions defined by ACPI spec, providing erst_write/
erst_read/ erst_clear
interfaces to MCE/ NMI/ PCIe error handling mechanism, etc.
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
b/xen/drivers/acpi/apei/Makefile | 3
b/xen/drivers/acpi/apei/apei-base.c | 278 +++++++++++
b/xen/drivers/acpi/apei/apei-internal.h | 73 ++
b/xen/drivers/acpi/apei/apei-io.c | 328 +++++++++++++
b/xen/drivers/acpi/apei/erst.c | 787 ++++++++++++++++++++++++++++++++
b/xen/include/acpi/apei.h | 31 +
b/xen/include/xen/cper.h | 80 +++
xen/arch/x86/acpi/boot.c | 2
xen/drivers/acpi/Makefile | 1
xen/include/acpi/actbl1.h | 103 ++++
xen/include/asm-x86/fixmap.h | 3
xen/include/xen/acpi.h | 1
xen/include/xen/spinlock.h | 7
13 files changed, 1697 insertions(+)
diff -r b622e411eef8 xen/arch/x86/acpi/boot.c
--- a/xen/arch/x86/acpi/boot.c Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/arch/x86/acpi/boot.c Fri Aug 20 17:38:07 2010 +0800
@@ -938,6 +938,8 @@ int __init acpi_boot_init(void)
acpi_mmcfg_init();
+ erst_init();
+
return 0;
}
diff -r b622e411eef8 xen/drivers/acpi/Makefile
--- a/xen/drivers/acpi/Makefile Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/drivers/acpi/Makefile Fri Aug 20 17:38:07 2010 +0800
@@ -1,5 +1,6 @@ subdir-y += tables
subdir-y += tables
subdir-y += utilities
+subdir-y += apei
obj-y += tables.o
obj-y += numa.o
diff -r b622e411eef8 xen/drivers/acpi/apei/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/apei/Makefile Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,3 @@
+obj-y += erst.o
+obj-y += apei-base.o
+obj-y += apei-io.o
diff -r b622e411eef8 xen/drivers/acpi/apei/apei-base.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/apei/apei-base.c Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,278 @@
+/*
+ * apei-base.c - ACPI Platform Error Interface (APEI) supporting
+ * infrastructure
+ *
+ * APEI allows to report errors (for example from the chipset) to the
+ * the operating system. This improves NMI handling especially. In
+ * addition it supports error serialization and error injection.
+ *
+ * For more information about APEI, please refer to ACPI Specification
+ * version 4.0, chapter 17.
+ *
+ * This file has Common functions used by more than one APEI table,
+ * including framework of interpreter for ERST and EINJ; resource
+ * management for APEI registers.
+ *
+ * This feature is ported from linux acpi tree
+ * Copyright (C) 2009, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ * Ported by: Liu, Jinsong <jinsong.liu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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
+ */
+#include <xen/kernel.h>
+#include <xen/errno.h>
+#include <xen/delay.h>
+#include <xen/string.h>
+#include <xen/types.h>
+#include <xen/spinlock.h>
+#include <xen/cper.h>
+#include <asm/io.h>
+#include <acpi/acpi.h>
+#include <acpi/apei.h>
+
+#include "apei-internal.h"
+
+/*
+ * APEI ERST (Error Record Serialization Table) and EINJ (Error
+ * INJection) interpreter framework.
+ */
+
+#define APEI_EXEC_PRESERVE_REGISTER 0x1
+
+int apei_exec_ctx_init(struct apei_exec_context *ctx,
+ struct apei_exec_ins_type *ins_table,
+ u32 instructions,
+ struct acpi_whea_header *action_table,
+ u32 entries)
+{
+ if (!ctx)
+ return -EINVAL;
+
+ ctx->ins_table = ins_table;
+ ctx->instructions = instructions;
+ ctx->action_table = action_table;
+ ctx->entries = entries;
+ return 0;
+}
+
+int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val)
+{
+ int rc;
+
+ rc = apei_read(val, &entry->register_region);
+ if (rc)
+ return rc;
+ *val >>= entry->register_region.bit_offset;
+ *val &= entry->mask;
+
+ return 0;
+}
+
+int apei_exec_read_register(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 val = 0;
+
+ rc = __apei_exec_read_register(entry, &val);
+ if (rc)
+ return rc;
+ ctx->value = val;
+
+ return 0;
+}
+
+int apei_exec_read_register_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+
+ rc = apei_exec_read_register(ctx, entry);
+ if (rc)
+ return rc;
+ ctx->value = (ctx->value == entry->value);
+
+ return 0;
+}
+
+int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val)
+{
+ int rc;
+
+ val &= entry->mask;
+ val <<= entry->register_region.bit_offset;
+ if (entry->flags & APEI_EXEC_PRESERVE_REGISTER) {
+ u64 valr = 0;
+ rc = apei_read(&valr, &entry->register_region);
+ if (rc)
+ return rc;
+ valr &= ~(entry->mask <<
entry->register_region.bit_offset);
+ val |= valr;
+ }
+ rc = apei_write(val, &entry->register_region);
+
+ return rc;
+}
+
+int apei_exec_write_register(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_write_register(entry, ctx->value);
+}
+
+int apei_exec_write_register_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+
+ ctx->value = entry->value;
+ rc = apei_exec_write_register(ctx, entry);
+
+ return rc;
+}
+
+int apei_exec_noop(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return 0;
+}
+
+/*
+ * Interpret the specified action. Go through whole action table,
+ * execute all instructions belong to the action.
+ */
+int apei_exec_run(struct apei_exec_context *ctx, u8 action)
+{
+ int rc;
+ u32 i, ip;
+ struct acpi_whea_header *entry;
+ apei_exec_ins_func_t run;
+
+ ctx->ip = 0;
+
+ /*
+ * "ip" is the instruction pointer of current instruction,
+ * "ctx->ip" specifies the next instruction to executed,
+ * instruction "run" function may change the
"ctx->ip" to
+ * implement "goto" semantics.
+ */
+rewind:
+ ip = 0;
+ for (i = 0; i < ctx->entries; i++) {
+ entry = &ctx->action_table[i];
+ if (entry->action != action)
+ continue;
+ if (ip == ctx->ip) {
+ if (entry->instruction >= ctx->instructions ||
+ !ctx->ins_table[entry->instruction].run) {
+ printk(KERN_WARNING
+ "Invalid action table, unknown instruction
"
+ "type: %d\n", entry->instruction);
+ return -EINVAL;
+ }
+ run = ctx->ins_table[entry->instruction].run;
+ rc = run(ctx, entry);
+ if (rc < 0)
+ return rc;
+ else if (rc != APEI_EXEC_SET_IP)
+ ctx->ip++;
+ }
+ ip++;
+ if (ctx->ip < ip)
+ goto rewind;
+ }
+
+ return 0;
+}
+
+typedef int (*apei_exec_entry_func_t)(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry,
+ void *data);
+
+static int apei_exec_for_each_entry(struct apei_exec_context *ctx,
+ apei_exec_entry_func_t func,
+ void *data,
+ int *end)
+{
+ u8 ins;
+ int i, rc;
+ struct acpi_whea_header *entry;
+ struct apei_exec_ins_type *ins_table = ctx->ins_table;
+
+ for (i = 0; i < ctx->entries; i++) {
+ entry = ctx->action_table + i;
+ ins = entry->instruction;
+ if (end)
+ *end = i;
+ if (ins >= ctx->instructions || !ins_table[ins].run) {
+ printk(KERN_WARNING "Invalid action table, "
+ "unknown instruction type: %d\n", ins);
+ return -EINVAL;
+ }
+ rc = func(ctx, entry, data);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static int pre_map_gar_callback(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry,
+ void *data)
+{
+ u8 ins = entry->instruction;
+
+ if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
+ return apei_pre_map_gar(&entry->register_region);
+
+ return 0;
+}
+
+/* Pre-map all GARs in action table. */
+int apei_exec_pre_map_gars(struct apei_exec_context *ctx)
+{
+ int rc, end;
+
+ rc = apei_exec_for_each_entry(ctx, pre_map_gar_callback,
+ NULL, &end);
+ if (rc) {
+ struct apei_exec_context ctx_unmap;
+ memcpy(&ctx_unmap, ctx, sizeof(*ctx));
+ ctx_unmap.entries = end;
+ apei_exec_post_unmap_gars(&ctx_unmap);
+ }
+
+ return rc;
+}
+
+static int post_unmap_gar_callback(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry,
+ void *data)
+{
+ u8 ins = entry->instruction;
+
+ if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
+ apei_post_unmap_gar(&entry->register_region);
+
+ return 0;
+}
+
+/* Post-unmap all GAR in action table. */
+int apei_exec_post_unmap_gars(struct apei_exec_context *ctx)
+{
+ return apei_exec_for_each_entry(ctx, post_unmap_gar_callback,
+ NULL, NULL);
+}
diff -r b622e411eef8 xen/drivers/acpi/apei/apei-internal.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/apei/apei-internal.h Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,73 @@
+/*
+ * apei-internal.h - ACPI Platform Error Interface internal
+ * definations.
+ */
+
+#ifndef APEI_INTERNAL_H
+#define APEI_INTERNAL_H
+
+struct apei_exec_context;
+
+typedef int (*apei_exec_ins_func_t)(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+
+#define APEI_EXEC_INS_ACCESS_REGISTER 0x0001
+
+struct apei_exec_ins_type {
+ u32 flags;
+ apei_exec_ins_func_t run;
+};
+
+struct apei_exec_context {
+ u32 ip;
+ u64 value;
+ u64 var1;
+ u64 var2;
+ u64 src_base;
+ u64 dst_base;
+ struct apei_exec_ins_type *ins_table;
+ u32 instructions;
+ struct acpi_whea_header *action_table;
+ u32 entries;
+};
+
+int apei_exec_ctx_init(struct apei_exec_context *ctx,
+ struct apei_exec_ins_type *ins_table,
+ u32 instructions,
+ struct acpi_whea_header *action_table,
+ u32 entries);
+
+static inline void apei_exec_ctx_set_input(struct apei_exec_context *ctx,
+ u64 input)
+{
+ ctx->value = input;
+}
+
+static inline u64 apei_exec_ctx_get_output(struct apei_exec_context *ctx)
+{
+ return ctx->value;
+}
+
+int apei_exec_run(struct apei_exec_context *ctx, u8 action);
+
+/* Common instruction implementation */
+
+/* IP has been set in instruction function */
+#define APEI_EXEC_SET_IP 1
+
+int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val);
+int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val);
+int apei_exec_read_register(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+int apei_exec_read_register_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+int apei_exec_write_register(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+int apei_exec_write_register_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+int apei_exec_noop(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry);
+int apei_exec_pre_map_gars(struct apei_exec_context *ctx);
+int apei_exec_post_unmap_gars(struct apei_exec_context *ctx);
+
+#endif
diff -r b622e411eef8 xen/drivers/acpi/apei/apei-io.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/apei/apei-io.c Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,328 @@
+/*
+ * apei-io.c - APEI IO memory pre-mapping/post-unmapping and access
+ *
+ * Copyright (C) 2009-2010, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ * Ported by: Liu, Jinsong <jinsong.liu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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
+ */
+
+#include <xen/kernel.h>
+#include <xen/errno.h>
+#include <xen/delay.h>
+#include <xen/string.h>
+#include <xen/xmalloc.h>
+#include <xen/types.h>
+#include <xen/spinlock.h>
+#include <xen/list.h>
+#include <xen/cper.h>
+#include <xen/prefetch.h>
+#include <asm/fixmap.h>
+#include <asm/io.h>
+#include <acpi/acpi.h>
+#include <acpi/apei.h>
+
+static LIST_HEAD(apei_iomaps);
+/*
+ * Used for mutual exclusion between writers of apei_iomaps list, for
+ * synchronization between readers and writer.
+ */
+static DEFINE_SPINLOCK(apei_iomaps_lock);
+
+struct apei_iomap {
+ struct list_head list;
+ void __iomem *vaddr;
+ unsigned long size;
+ paddr_t paddr;
+};
+
+static struct apei_iomap *__apei_find_iomap(paddr_t paddr,
+ unsigned long size)
+{
+ struct apei_iomap *map;
+
+ list_for_each_entry(map, &apei_iomaps, list) {
+ if (map->paddr + map->size >= paddr + size &&
+ map->paddr <= paddr)
+ return map;
+ }
+ return NULL;
+}
+
+static void __iomem *__apei_ioremap_fast(paddr_t paddr,
+ unsigned long size)
+{
+ struct apei_iomap *map;
+
+ map = __apei_find_iomap(paddr, size);
+ if (map)
+ return map->vaddr + (paddr - map->paddr);
+ else
+ return NULL;
+}
+
+static int apei_range_nr;
+
+static void __iomem *apei_range_map(paddr_t paddr, unsigned long size)
+{
+ int i, pg;
+ int start_nr, cur_nr;
+
+ pg = ((((paddr + size -1) & PAGE_MASK)
+ - (paddr & PAGE_MASK)) >> PAGE_SHIFT) + 1;
+ if (apei_range_nr + pg > FIX_APEI_RANGE_MAX)
+ return NULL;
+
+ start_nr = apei_range_nr + pg -1;
+ for (i = 0; i < pg; i++) {
+ cur_nr = start_nr - i;
+ set_fixmap_nocache(FIX_APEI_RANGE_BASE + cur_nr,
+ paddr + (i << PAGE_SHIFT));
+ apei_range_nr++;
+ }
+
+ return (void __iomem *)fix_to_virt(FIX_APEI_RANGE_BASE + start_nr);
+}
+
+/*
+ * Used to pre-map the specified IO memory area. First try to find
+ * whether the area is already pre-mapped, if it is, return; otherwise,
+ * do the real map, and add the mapping into apei_iomaps list.
+ */
+void __iomem *apei_pre_map(paddr_t paddr, unsigned long size)
+{
+ void __iomem *vaddr;
+ struct apei_iomap *map;
+ unsigned long flags;
+
+ spin_lock_irqsave(&apei_iomaps_lock, flags);
+ vaddr = __apei_ioremap_fast(paddr, size);
+ spin_unlock_irqrestore(&apei_iomaps_lock, flags);
+ if (vaddr)
+ return vaddr;
+
+ map = xmalloc(struct apei_iomap);
+ if (!map)
+ return NULL;
+
+ vaddr = apei_range_map(paddr, size);
+ if (!vaddr) {
+ xfree(map);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&map->list);
+ map->paddr = paddr & PAGE_MASK;
+ map->size = (((paddr + size + PAGE_SIZE -1) & PAGE_MASK)
+ - (paddr & PAGE_MASK));
+ map->vaddr = vaddr;
+
+ spin_lock_irqsave(&apei_iomaps_lock, flags);
+ list_add_tail(&map->list, &apei_iomaps);
+ spin_unlock_irqrestore(&apei_iomaps_lock, flags);
+
+ return map->vaddr + (paddr - map->paddr);
+}
+
+/*
+ * Used to post-unmap the specified IO memory area.
+ */
+static void apei_post_unmap(paddr_t paddr, unsigned long size)
+{
+ struct apei_iomap *map;
+ unsigned long flags;
+
+ spin_lock_irqsave(&apei_iomaps_lock, flags);
+ map = __apei_find_iomap(paddr, size);
+ if (!map);
+ return;
+
+ list_del(&map->list);
+ spin_unlock_irqrestore(&apei_iomaps_lock, flags);
+
+ xfree(map);
+}
+
+/* In NMI handler, should set silent = 1 */
+static int apei_check_gar(struct acpi_generic_address *reg,
+ u64 *paddr, int silent)
+{
+ u32 width, space_id;
+
+ width = reg->bit_width;
+ space_id = reg->space_id;
+ /* Handle possible alignment issues */
+ memcpy(paddr, ®->address, sizeof(*paddr));
+ if (!*paddr) {
+ if (!silent)
+ printk(KERN_WARNING
+ "Invalid physical address in GAR\n");
+ return -EINVAL;
+ }
+
+ if ((width != 8) && (width != 16) && (width != 32)
&& (width != 64)) {
+ if (!silent)
+ printk(KERN_WARNING
+ "Invalid bit width in GAR\n");
+ return -EINVAL;
+ }
+
+ if (space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY &&
+ space_id != ACPI_ADR_SPACE_SYSTEM_IO) {
+ if (!silent)
+ printk(KERN_WARNING
+ "Invalid address space type in GAR\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Pre-map, working on GAR */
+int apei_pre_map_gar(struct acpi_generic_address *reg)
+{
+ u64 paddr;
+ void __iomem *vaddr;
+ int rc;
+
+ if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return 0;
+
+ rc = apei_check_gar(reg, &paddr, 0);
+ if (rc)
+ return rc;
+
+ vaddr = apei_pre_map(paddr, reg->bit_width / 8);
+ if (!vaddr)
+ return -EIO;
+
+ return 0;
+}
+
+/* Post-unmap, working on GAR */
+int apei_post_unmap_gar(struct acpi_generic_address *reg)
+{
+ u64 paddr;
+ int rc;
+
+ if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return 0;
+
+ rc = apei_check_gar(reg, &paddr, 0);
+ if (rc)
+ return rc;
+
+ apei_post_unmap(paddr, reg->bit_width / 8);
+
+ return 0;
+}
+
+static int apei_read_mem(u64 paddr, u64 *val, u32 width)
+{
+ void __iomem *addr;
+ u64 tmpval;
+
+ addr = __apei_ioremap_fast(paddr, width);
+ switch (width) {
+ case 8:
+ *val = readb(addr);
+ break;
+ case 16:
+ *val = readw(addr);
+ break;
+ case 32:
+ *val = readl(addr);
+ break;
+ case 64:
+ tmpval = (u64)readl(addr);
+ tmpval |= ((u64)readl(addr+4)) << 32;
+ *val = tmpval;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int apei_write_mem(u64 paddr, u64 val, u32 width)
+{
+ void __iomem *addr;
+ u32 tmpval;
+
+ addr = __apei_ioremap_fast(paddr, width);
+ switch (width) {
+ case 8:
+ writeb(val, addr);
+ break;
+ case 16:
+ writew(val, addr);
+ break;
+ case 32:
+ writel(val, addr);
+ break;
+ case 64:
+ tmpval = (u32)val;
+ writel(tmpval, addr);
+ tmpval = (u32)(val >> 32);
+ writel(tmpval, addr+4);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int apei_read(u64 *val, struct acpi_generic_address *reg)
+{
+ u64 paddr;
+ int rc;
+
+ rc = apei_check_gar(reg, &paddr, 1);
+ if (rc)
+ return rc;
+
+ *val = 0;
+
+ /* currently all erst implementation take bit_width as real range */
+ switch (reg->space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+ return apei_read_mem(paddr, val, reg->bit_width);
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ return acpi_os_read_port(paddr, (u32 *)val, reg->bit_width);
+ default:
+ return -EINVAL;
+ }
+}
+
+int apei_write(u64 val, struct acpi_generic_address *reg)
+{
+ u64 paddr;
+ int rc;
+
+ rc = apei_check_gar(reg, &paddr, 1);
+ if (rc)
+ return rc;
+
+ switch (reg->space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+ return apei_write_mem(paddr, val, reg->bit_width);
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ return acpi_os_write_port(paddr, val, reg->bit_width);
+ default:
+ return -EINVAL;
+ }
+}
diff -r b622e411eef8 xen/drivers/acpi/apei/erst.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/drivers/acpi/apei/erst.c Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,787 @@
+/*
+ * APEI Error Record Serialization Table support
+ *
+ * ERST is a way provided by APEI to save and retrieve hardware error
+ * infomation to and from a persistent store.
+ *
+ * For more information about ERST, please refer to ACPI Specification
+ * version 4.0, section 17.4.
+ *
+ * This feature is ported from linux acpi tree
+ * Copyright 2010 Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ * Ported by: Liu, Jinsong <jinsong.liu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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
+ */
+
+#include <xen/kernel.h>
+#include <xen/errno.h>
+#include <xen/delay.h>
+#include <xen/string.h>
+#include <xen/types.h>
+#include <xen/spinlock.h>
+#include <xen/cper.h>
+#include <asm/fixmap.h>
+#include <asm/io.h>
+#include <acpi/acpi.h>
+#include <acpi/apei.h>
+
+#include "apei-internal.h"
+
+/* ERST command status */
+#define ERST_STATUS_SUCCESS 0x0
+#define ERST_STATUS_NOT_ENOUGH_SPACE 0x1
+#define ERST_STATUS_HARDWARE_NOT_AVAILABLE 0x2
+#define ERST_STATUS_FAILED 0x3
+#define ERST_STATUS_RECORD_STORE_EMPTY 0x4
+#define ERST_STATUS_RECORD_NOT_FOUND 0x5
+
+#define ERST_TAB_ENTRY(tab) \
+ ((struct acpi_whea_header *)((char *)(tab) + \
+ sizeof(struct acpi_table_erst)))
+
+#define SPIN_UNIT 1 /* 1us */
+/* Firmware should respond within 1 miliseconds */
+#define FIRMWARE_TIMEOUT (1 * 1000)
+#define FIRMWARE_MAX_STALL 50 /* 50us */
+
+static struct acpi_table_erst *erst_tab;
+static int erst_enabled;
+
+/* ERST Error Log Address Range atrributes */
+#define ERST_RANGE_RESERVED 0x0001
+#define ERST_RANGE_NVRAM 0x0002
+#define ERST_RANGE_SLOW 0x0004
+
+/*
+ * ERST Error Log Address Range, used as buffer for reading/writing
+ * error records.
+ */
+static struct erst_erange {
+ u64 base;
+ u64 size;
+ void __iomem *vaddr;
+ u32 attr;
+} erst_erange;
+
+/*
+ * Prevent ERST interpreter to run simultaneously, because the
+ * corresponding firmware implementation may not work properly when
+ * invoked simultaneously.
+ *
+ * It is used to provide exclusive accessing for ERST Error Log
+ * Address Range too.
+ */
+static DEFINE_SPINLOCK(erst_lock);
+
+static inline int erst_errno(int command_status)
+{
+ switch (command_status) {
+ case ERST_STATUS_SUCCESS:
+ return 0;
+ case ERST_STATUS_HARDWARE_NOT_AVAILABLE:
+ return -ENODEV;
+ case ERST_STATUS_NOT_ENOUGH_SPACE:
+ return -ENOSPC;
+ case ERST_STATUS_RECORD_STORE_EMPTY:
+ case ERST_STATUS_RECORD_NOT_FOUND:
+ return -ENOENT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int erst_timedout(u64 *t, u64 spin_unit)
+{
+ if ((s64)*t < spin_unit) {
+ printk(XENLOG_WARNING "Firmware does not respond in
time\n");
+ return 1;
+ }
+ *t -= spin_unit;
+ udelay(spin_unit);
+ return 0;
+}
+
+static int erst_exec_load_var1(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_read_register(entry, &ctx->var1);
+}
+
+static int erst_exec_load_var2(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_read_register(entry, &ctx->var2);
+}
+
+static int erst_exec_store_var1(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_write_register(entry, ctx->var1);
+}
+
+static int erst_exec_add(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ ctx->var1 += ctx->var2;
+ return 0;
+}
+
+static int erst_exec_subtract(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ ctx->var1 -= ctx->var2;
+ return 0;
+}
+
+static int erst_exec_add_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 val;
+
+ rc = __apei_exec_read_register(entry, &val);
+ if (rc)
+ return rc;
+ val += ctx->value;
+ rc = __apei_exec_write_register(entry, val);
+ return rc;
+}
+
+static int erst_exec_subtract_value(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 val;
+
+ rc = __apei_exec_read_register(entry, &val);
+ if (rc)
+ return rc;
+ val -= ctx->value;
+ rc = __apei_exec_write_register(entry, val);
+ return rc;
+}
+
+static int erst_exec_stall(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ udelay((ctx->var1 > FIRMWARE_MAX_STALL) ?
+ FIRMWARE_MAX_STALL :
+ ctx->var1);
+ return 0;
+}
+
+static int erst_exec_stall_while_true(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 val;
+ u64 timeout = FIRMWARE_TIMEOUT;
+ u64 stall_time = (ctx->var1 > FIRMWARE_MAX_STALL) ?
+ FIRMWARE_MAX_STALL :
+ ctx->var1;
+
+ for (;;) {
+ rc = __apei_exec_read_register(entry, &val);
+ if (rc)
+ return rc;
+ if (val != ctx->value)
+ break;
+ if (erst_timedout(&timeout, stall_time))
+ return -EIO;
+ }
+ return 0;
+}
+
+static int erst_exec_skip_next_instruction_if_true(
+ struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 val;
+
+ rc = __apei_exec_read_register(entry, &val);
+ if (rc)
+ return rc;
+ if (val == ctx->value) {
+ ctx->ip += 2;
+ return APEI_EXEC_SET_IP;
+ }
+
+ return 0;
+}
+
+static int erst_exec_goto(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ ctx->ip = ctx->value;
+ return APEI_EXEC_SET_IP;
+}
+
+static int erst_exec_set_src_address_base(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_read_register(entry, &ctx->src_base);
+}
+
+static int erst_exec_set_dst_address_base(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ return __apei_exec_read_register(entry, &ctx->dst_base);
+}
+
+static int erst_exec_move_data(struct apei_exec_context *ctx,
+ struct acpi_whea_header *entry)
+{
+ int rc;
+ u64 offset;
+
+ rc = __apei_exec_read_register(entry, &offset);
+ if (rc)
+ return rc;
+ memmove((void *)ctx->dst_base + offset,
+ (void *)ctx->src_base + offset,
+ ctx->var2);
+
+ return 0;
+}
+
+static struct apei_exec_ins_type erst_ins_type[] = {
+ [ACPI_ERST_READ_REGISTER] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = apei_exec_read_register,
+ },
+ [ACPI_ERST_READ_REGISTER_VALUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = apei_exec_read_register_value,
+ },
+ [ACPI_ERST_WRITE_REGISTER] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = apei_exec_write_register,
+ },
+ [ACPI_ERST_WRITE_REGISTER_VALUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = apei_exec_write_register_value,
+ },
+ [ACPI_ERST_NOOP] = {
+ .flags = 0,
+ .run = apei_exec_noop,
+ },
+ [ACPI_ERST_LOAD_VAR1] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_load_var1,
+ },
+ [ACPI_ERST_LOAD_VAR2] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_load_var2,
+ },
+ [ACPI_ERST_STORE_VAR1] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_store_var1,
+ },
+ [ACPI_ERST_ADD] = {
+ .flags = 0,
+ .run = erst_exec_add,
+ },
+ [ACPI_ERST_SUBTRACT] = {
+ .flags = 0,
+ .run = erst_exec_subtract,
+ },
+ [ACPI_ERST_ADD_VALUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_add_value,
+ },
+ [ACPI_ERST_SUBTRACT_VALUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_subtract_value,
+ },
+ [ACPI_ERST_STALL] = {
+ .flags = 0,
+ .run = erst_exec_stall,
+ },
+ [ACPI_ERST_STALL_WHILE_TRUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_stall_while_true,
+ },
+ [ACPI_ERST_SKIP_NEXT_IF_TRUE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_skip_next_instruction_if_true,
+ },
+ [ACPI_ERST_GOTO] = {
+ .flags = 0,
+ .run = erst_exec_goto,
+ },
+ [ACPI_ERST_SET_SRC_ADDRESS_BASE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_set_src_address_base,
+ },
+ [ACPI_ERST_SET_DST_ADDRESS_BASE] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_set_dst_address_base,
+ },
+ [ACPI_ERST_MOVE_DATA] = {
+ .flags = APEI_EXEC_INS_ACCESS_REGISTER,
+ .run = erst_exec_move_data,
+ },
+};
+
+static inline void erst_exec_ctx_init(struct apei_exec_context *ctx)
+{
+ apei_exec_ctx_init(ctx, erst_ins_type, ARRAY_SIZE(erst_ins_type),
+ ERST_TAB_ENTRY(erst_tab), erst_tab->entries);
+}
+
+static int erst_get_erange(struct erst_erange *range)
+{
+ struct apei_exec_context ctx;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_RANGE);
+ if (rc)
+ return rc;
+ range->base = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_LENGTH);
+ if (rc)
+ return rc;
+ range->size = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_ATTRIBUTES);
+ if (rc)
+ return rc;
+ range->attr = apei_exec_ctx_get_output(&ctx);
+
+ return 0;
+}
+
+static size_t __erst_get_record_count(void)
+{
+ struct apei_exec_context ctx;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_COUNT);
+ if (rc)
+ return rc;
+ return apei_exec_ctx_get_output(&ctx);
+}
+
+size_t erst_get_record_count(void)
+{
+ size_t count;
+ unsigned long flags;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ spin_lock_irqsave(&erst_lock, flags);
+ count = __erst_get_record_count();
+ spin_unlock_irqrestore(&erst_lock, flags);
+
+ return count;
+}
+
+static int __erst_get_next_record_id(u64 *record_id)
+{
+ struct apei_exec_context ctx;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_ID);
+ if (rc)
+ return rc;
+ *record_id = apei_exec_ctx_get_output(&ctx);
+
+ return 0;
+}
+
+/*
+ * Get the record ID of an existing error record on the persistent
+ * storage. If there is no error record on the persistent storage, the
+ * returned record_id is APEI_ERST_INVALID_RECORD_ID.
+ */
+int erst_get_next_record_id(u64 *record_id)
+{
+ int rc;
+ unsigned long flags;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ spin_lock_irqsave(&erst_lock, flags);
+ rc = __erst_get_next_record_id(record_id);
+ spin_unlock_irqrestore(&erst_lock, flags);
+
+ return rc;
+}
+
+static int __erst_write_to_storage(u64 offset)
+{
+ struct apei_exec_context ctx;
+ u64 timeout = FIRMWARE_TIMEOUT;
+ u64 val;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_WRITE);
+ if (rc)
+ return rc;
+ apei_exec_ctx_set_input(&ctx, offset);
+ rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET);
+ if (rc)
+ return rc;
+ rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+ if (rc)
+ return rc;
+ for (;;) {
+ rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ if (!val)
+ break;
+ if (erst_timedout(&timeout, SPIN_UNIT))
+ return -EIO;
+ }
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_END);
+ if (rc)
+ return rc;
+
+ return erst_errno(val);
+}
+
+static int __erst_read_from_storage(u64 record_id, u64 offset)
+{
+ struct apei_exec_context ctx;
+ u64 timeout = FIRMWARE_TIMEOUT;
+ u64 val;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_READ);
+ if (rc)
+ return rc;
+ apei_exec_ctx_set_input(&ctx, offset);
+ rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET);
+ if (rc)
+ return rc;
+ apei_exec_ctx_set_input(&ctx, record_id);
+ rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID);
+ if (rc)
+ return rc;
+ rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+ if (rc)
+ return rc;
+ for (;;) {
+ rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ if (!val)
+ break;
+ if (erst_timedout(&timeout, SPIN_UNIT))
+ return -EIO;
+ };
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_END);
+ if (rc)
+ return rc;
+
+ return erst_errno(val);
+}
+
+static int __erst_clear_from_storage(u64 record_id)
+{
+ struct apei_exec_context ctx;
+ u64 timeout = FIRMWARE_TIMEOUT;
+ u64 val;
+ int rc;
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_CLEAR);
+ if (rc)
+ return rc;
+ apei_exec_ctx_set_input(&ctx, record_id);
+ rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID);
+ if (rc)
+ return rc;
+ rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+ if (rc)
+ return rc;
+ for (;;) {
+ rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ if (!val)
+ break;
+ if (erst_timedout(&timeout, SPIN_UNIT))
+ return -EIO;
+ }
+ rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+ if (rc)
+ return rc;
+ val = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_END);
+ if (rc)
+ return rc;
+
+ return erst_errno(val);
+}
+
+/* NVRAM ERST Error Log Address Range is not supported yet */
+static int __erst_write_to_nvram(const struct cper_record_header *record)
+{
+ /* do not print message, because printk is not safe for NMI */
+ return -ENOSYS;
+}
+
+static int __erst_read_to_erange_from_nvram(u64 record_id, u64 *offset)
+{
+ printk(KERN_WARNING
+ "NVRAM ERST Log Address Range is not implemented
yet\n");
+ return -ENOSYS;
+}
+
+static int __erst_clear_from_nvram(u64 record_id)
+{
+ printk(KERN_WARNING
+ "NVRAM ERST Log Address Range is not implemented
yet\n");
+ return -ENOSYS;
+}
+
+int erst_write(const struct cper_record_header *record)
+{
+ int rc;
+ unsigned long flags;
+ struct cper_record_header *rcd_erange;
+
+ if (!record)
+ return -EINVAL;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ if (memcmp(record->signature, CPER_SIG_RECORD, CPER_SIG_SIZE))
+ return -EINVAL;
+
+ if (erst_erange.attr & ERST_RANGE_NVRAM) {
+ if (!spin_trylock_irqsave(&erst_lock, flags))
+ return -EBUSY;
+ rc = __erst_write_to_nvram(record);
+ spin_unlock_irqrestore(&erst_lock, flags);
+ return rc;
+ }
+
+ if (record->record_length > erst_erange.size)
+ return -EINVAL;
+
+ if (!spin_trylock_irqsave(&erst_lock, flags))
+ return -EBUSY;
+ memcpy(erst_erange.vaddr, record, record->record_length);
+ rcd_erange = erst_erange.vaddr;
+ /* signature for serialization system */
+ memcpy(&rcd_erange->persistence_information, "ER", 2);
+
+ rc = __erst_write_to_storage(0);
+ spin_unlock_irqrestore(&erst_lock, flags);
+
+ return rc;
+}
+
+static int __erst_read_to_erange(u64 record_id, u64 *offset)
+{
+ int rc;
+
+ if (erst_erange.attr & ERST_RANGE_NVRAM)
+ return __erst_read_to_erange_from_nvram(
+ record_id, offset);
+
+ rc = __erst_read_from_storage(record_id, 0);
+ if (rc)
+ return rc;
+ *offset = 0;
+
+ return 0;
+}
+
+static size_t __erst_read(u64 record_id, struct cper_record_header *record,
+ size_t buflen)
+{
+ int rc;
+ u64 offset, len = 0;
+ struct cper_record_header *rcd_tmp;
+
+ rc = __erst_read_to_erange(record_id, &offset);
+ if (rc)
+ return rc;
+ rcd_tmp = erst_erange.vaddr + offset;
+ len = rcd_tmp->record_length;
+ if (len <= buflen)
+ memcpy(record, rcd_tmp, len);
+
+ return len;
+}
+
+/*
+ * If return value > buflen, the buffer size is not big enough,
+ * else if return value < 0, something goes wrong,
+ * else everything is OK, and return value is record length
+ */
+size_t erst_read(u64 record_id, struct cper_record_header *record,
+ size_t buflen)
+{
+ size_t len;
+ unsigned long flags;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ spin_lock_irqsave(&erst_lock, flags);
+ len = __erst_read(record_id, record, buflen);
+ spin_unlock_irqrestore(&erst_lock, flags);
+ return len;
+}
+
+/*
+ * If return value > buflen, the buffer size is not big enough,
+ * else if return value = 0, there is no more record to read,
+ * else if return value < 0, something goes wrong,
+ * else everything is OK, and return value is record length
+ */
+size_t erst_read_next(struct cper_record_header *record, size_t buflen)
+{
+ int rc;
+ size_t len;
+ unsigned long flags;
+ u64 record_id;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ spin_lock_irqsave(&erst_lock, flags);
+ rc = __erst_get_next_record_id(&record_id);
+ if (rc) {
+ spin_unlock_irqrestore(&erst_lock, flags);
+ return rc;
+ }
+ /* no more record */
+ if (record_id == APEI_ERST_INVALID_RECORD_ID) {
+ spin_unlock_irqrestore(&erst_lock, flags);
+ return 0;
+ }
+
+ len = __erst_read(record_id, record, buflen);
+ spin_unlock_irqrestore(&erst_lock, flags);
+
+ return len;
+}
+
+int erst_clear(u64 record_id)
+{
+ int rc;
+ unsigned long flags;
+
+ if (!erst_enabled)
+ return -ENODEV;
+
+ spin_lock_irqsave(&erst_lock, flags);
+ if (erst_erange.attr & ERST_RANGE_NVRAM)
+ rc = __erst_clear_from_nvram(record_id);
+ else
+ rc = __erst_clear_from_storage(record_id);
+ spin_unlock_irqrestore(&erst_lock, flags);
+
+ return rc;
+}
+
+static int erst_check_table(struct acpi_table_erst *erst_tab)
+{
+ if (erst_tab->header_length != sizeof(struct acpi_table_erst))
+ return -EINVAL;
+ if (erst_tab->header.length < sizeof(struct acpi_table_erst))
+ return -EINVAL;
+ if (erst_tab->entries !+ (erst_tab->header.length -
sizeof(struct acpi_table_erst)) /
+ sizeof(struct acpi_erst_entry))
+ return -EINVAL;
+
+ return 0;
+}
+
+int erst_init(void)
+{
+ int rc = 0;
+ acpi_status status;
+ struct apei_exec_context ctx;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ status = acpi_get_table(ACPI_SIG_ERST, 0,
+ (struct acpi_table_header **)&erst_tab);
+ if (status == AE_NOT_FOUND) {
+ printk(KERN_ERR "Table is not found!\n");
+ return -ENODEV;
+ } else if (ACPI_FAILURE(status)) {
+ const char *msg = acpi_format_exception(status);
+ printk(KERN_ERR "Failed to get table, %s\n", msg);
+ return -EINVAL;
+ }
+
+ rc = erst_check_table(erst_tab);
+ if (rc) {
+ printk(KERN_ERR "ERST table is invalid\n");
+ return rc;
+ }
+
+ erst_exec_ctx_init(&ctx);
+ rc = apei_exec_pre_map_gars(&ctx);
+ if (rc)
+ return rc;
+
+ rc = erst_get_erange(&erst_erange);
+ if (rc) {
+ if (rc == -ENODEV)
+ printk(KERN_INFO
+ "The corresponding hardware device or firmware
"
+ "implementation is not available.\n");
+ else
+ printk(KERN_ERR
+ "Failed to get Error Log Address
Range.\n");
+ goto err_unmap_reg;
+ }
+
+ erst_erange.vaddr = apei_pre_map(erst_erange.base, erst_erange.size);
+ if (!erst_erange.vaddr) {
+ rc = -ENOMEM;
+ goto err_unmap_reg;
+ }
+
+ printk(KERN_INFO "Xen ERST support is initialized.\n");
+ erst_enabled = 1;
+
+ return 0;
+
+err_unmap_reg:
+ apei_exec_post_unmap_gars(&ctx);
+ return rc;
+}
diff -r b622e411eef8 xen/include/acpi/actbl1.h
--- a/xen/include/acpi/actbl1.h Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/include/acpi/actbl1.h Fri Aug 20 17:38:07 2010 +0800
@@ -60,6 +60,7 @@
#define ACPI_SIG_ASF "ASF!" /* Alert Standard Format table
*/
#define ACPI_SIG_BOOT "BOOT" /* Simple Boot Flag Table */
#define ACPI_SIG_CPEP "CPEP" /* Corrected Platform Error
Polling table */
+#define ACPI_SIG_ERST "ERST" /* Error Record Serialization
Table */
#define ACPI_SIG_DBGP "DBGP" /* Debug Port table */
#define ACPI_SIG_DMAR "DMAR" /* DMA Remapping table */
#define ACPI_SIG_ECDT "ECDT" /* Embedded Controller Boot
Resources Table */
@@ -91,6 +92,18 @@ struct acpi_subtable_header {
struct acpi_subtable_header {
u8 type;
u8 length;
+};
+
+/* Subtable header for WHEA tables (EINJ, ERST, WDAT) */
+
+struct acpi_whea_header {
+ u8 action;
+ u8 instruction;
+ u8 flags;
+ u8 reserved;
+ struct acpi_generic_address register_region;
+ u64 value; /* Value used with Read/Write register */
+ u64 mask; /* Bitmask required for this register
instruction */
};
/*******************************************************************************
@@ -346,6 +359,96 @@ struct acpi_table_ecdt {
u32 uid; /* Unique ID - must be same as the EC _UID
method */
u8 gpe; /* The GPE for the EC */
u8 id[1]; /* Full namepath of the EC in the ACPI namespace
*/
+};
+
+/*******************************************************************************
+ *
+ * ERST - Error Record Serialization Table (ACPI 4.0)
+ * Version 1
+ *
+
******************************************************************************/
+
+struct acpi_table_erst {
+ struct acpi_table_header header; /* Common ACPI table header */
+ u32 header_length;
+ u32 reserved;
+ u32 entries;
+};
+
+/* ERST Serialization Entries (actions) */
+
+struct acpi_erst_entry {
+ struct acpi_whea_header whea_header; /* Common header for WHEA tables
*/
+};
+
+/* Masks for Flags field above */
+
+#define ACPI_ERST_PRESERVE (1)
+
+/* Values for Action field above */
+
+enum acpi_erst_actions {
+ ACPI_ERST_BEGIN_WRITE = 0,
+ ACPI_ERST_BEGIN_READ = 1,
+ ACPI_ERST_BEGIN_CLEAR = 2,
+ ACPI_ERST_END = 3,
+ ACPI_ERST_SET_RECORD_OFFSET = 4,
+ ACPI_ERST_EXECUTE_OPERATION = 5,
+ ACPI_ERST_CHECK_BUSY_STATUS = 6,
+ ACPI_ERST_GET_COMMAND_STATUS = 7,
+ ACPI_ERST_GET_RECORD_ID = 8,
+ ACPI_ERST_SET_RECORD_ID = 9,
+ ACPI_ERST_GET_RECORD_COUNT = 10,
+ ACPI_ERST_BEGIN_DUMMY_WRIITE = 11,
+ ACPI_ERST_NOT_USED = 12,
+ ACPI_ERST_GET_ERROR_RANGE = 13,
+ ACPI_ERST_GET_ERROR_LENGTH = 14,
+ ACPI_ERST_GET_ERROR_ATTRIBUTES = 15,
+ ACPI_ERST_ACTION_RESERVED = 16 /* 16 and greater are reserved */
+};
+
+/* Values for Instruction field above */
+
+enum acpi_erst_instructions {
+ ACPI_ERST_READ_REGISTER = 0,
+ ACPI_ERST_READ_REGISTER_VALUE = 1,
+ ACPI_ERST_WRITE_REGISTER = 2,
+ ACPI_ERST_WRITE_REGISTER_VALUE = 3,
+ ACPI_ERST_NOOP = 4,
+ ACPI_ERST_LOAD_VAR1 = 5,
+ ACPI_ERST_LOAD_VAR2 = 6,
+ ACPI_ERST_STORE_VAR1 = 7,
+ ACPI_ERST_ADD = 8,
+ ACPI_ERST_SUBTRACT = 9,
+ ACPI_ERST_ADD_VALUE = 10,
+ ACPI_ERST_SUBTRACT_VALUE = 11,
+ ACPI_ERST_STALL = 12,
+ ACPI_ERST_STALL_WHILE_TRUE = 13,
+ ACPI_ERST_SKIP_NEXT_IF_TRUE = 14,
+ ACPI_ERST_GOTO = 15,
+ ACPI_ERST_SET_SRC_ADDRESS_BASE = 16,
+ ACPI_ERST_SET_DST_ADDRESS_BASE = 17,
+ ACPI_ERST_MOVE_DATA = 18,
+ ACPI_ERST_INSTRUCTION_RESERVED = 19 /* 19 and greater are reserved
*/
+};
+
+/* Command status return values */
+
+enum acpi_erst_command_status {
+ ACPI_ERST_SUCESS = 0,
+ ACPI_ERST_NO_SPACE = 1,
+ ACPI_ERST_NOT_AVAILABLE = 2,
+ ACPI_ERST_FAILURE = 3,
+ ACPI_ERST_RECORD_EMPTY = 4,
+ ACPI_ERST_NOT_FOUND = 5,
+ ACPI_ERST_STATUS_RESERVED = 6 /* 6 and greater are reserved */
+};
+
+/* Error Record Serialization Information */
+
+struct acpi_erst_info {
+ u16 signature; /* Should be "ER" */
+ u8 data[48];
};
/*******************************************************************************
diff -r b622e411eef8 xen/include/acpi/apei.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/acpi/apei.h Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,31 @@
+/*
+ * apei.h - ACPI Platform Error Interface
+ */
+
+#ifndef ACPI_APEI_H
+#define ACPI_APEI_H
+
+#include <xen/acpi.h>
+#include <xen/cper.h>
+
+#define APEI_ERST_INVALID_RECORD_ID 0xffffffffffffffffULL
+
+#define FIX_APEI_RANGE_MAX 64
+
+int erst_write(const struct cper_record_header *record);
+size_t erst_get_record_count(void);
+int erst_get_next_record_id(u64 *record_id);
+size_t erst_read(u64 record_id, struct cper_record_header *record,
+ size_t buflen);
+size_t erst_read_next(struct cper_record_header *record, size_t buflen);
+int erst_clear(u64 record_id);
+
+void __iomem *apei_pre_map(paddr_t paddr, unsigned long size);
+
+int apei_pre_map_gar(struct acpi_generic_address *reg);
+int apei_post_unmap_gar(struct acpi_generic_address *reg);
+
+int apei_read(u64 *val, struct acpi_generic_address *reg);
+int apei_write(u64 val, struct acpi_generic_address *reg);
+
+#endif
diff -r b622e411eef8 xen/include/asm-x86/fixmap.h
--- a/xen/include/asm-x86/fixmap.h Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/include/asm-x86/fixmap.h Fri Aug 20 17:38:07 2010 +0800
@@ -20,6 +20,7 @@
#include <xen/iommu.h>
#include <asm/amd-iommu.h>
#include <asm/msi.h>
+#include <acpi/apei.h>
/*
* Here we define all the compile-time ''special'' virtual
@@ -52,6 +53,8 @@ enum fixed_addresses {
FIX_MSIX_IO_RESERV_BASE,
FIX_MSIX_IO_RESERV_END = FIX_MSIX_IO_RESERV_BASE + FIX_MSIX_MAX_PAGES -1,
FIX_TBOOT_MAP_ADDRESS,
+ FIX_APEI_RANGE_BASE,
+ FIX_APEI_RANGE_END = FIX_APEI_RANGE_BASE + FIX_APEI_RANGE_MAX -1,
__end_of_fixed_addresses
};
diff -r b622e411eef8 xen/include/xen/acpi.h
--- a/xen/include/xen/acpi.h Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/include/xen/acpi.h Fri Aug 20 17:38:07 2010 +0800
@@ -264,6 +264,7 @@ int acpi_boot_init (void);
int acpi_boot_init (void);
int acpi_boot_table_init (void);
int acpi_numa_init (void);
+int erst_init(void);
int acpi_table_init (void);
int acpi_table_parse(char *id, acpi_table_handler handler);
diff -r b622e411eef8 xen/include/xen/cper.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/xen/cper.h Fri Aug 20 17:38:07 2010 +0800
@@ -0,0 +1,80 @@
+/*
+ * UEFI Common Platform Error Record
+ *
+ * Copyright (C) 2010, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ * Ported by: Liu, Jinsong <jinsong.liu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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
+ */
+
+#ifndef LINUX_CPER_H
+#define LINUX_CPER_H
+
+#include <xen/types.h>
+
+typedef struct {
+ __u8 b[16];
+} uuid_le;
+
+/* CPER record signature and the size */
+#define CPER_SIG_RECORD "CPER"
+#define CPER_SIG_SIZE 4
+/* Used in signature_end field in struct cper_record_header */
+#define CPER_SIG_END 0xffffffff
+
+/*
+ * All tables and structs must be byte-packed to match CPER
+ * specification, since the tables are provided by the system BIOS
+ */
+#pragma pack(1)
+
+struct cper_record_header {
+ char signature[CPER_SIG_SIZE]; /* must be CPER_SIG_RECORD */
+ __u16 revision; /* must be CPER_RECORD_REV */
+ __u32 signature_end; /* must be CPER_SIG_END */
+ __u16 section_count;
+ __u32 error_severity;
+ __u32 validation_bits;
+ __u32 record_length;
+ __u64 timestamp;
+ uuid_le platform_id;
+ uuid_le partition_id;
+ uuid_le creator_id;
+ uuid_le notification_type;
+ __u64 record_id;
+ __u32 flags;
+ __u64 persistence_information;
+ __u8 reserved[12]; /* must be zero */
+};
+
+struct cper_section_descriptor {
+ __u32 section_offset; /* Offset in bytes of the
+ * section body from the base
+ * of the record header */
+ __u32 section_length;
+ __u16 revision; /* must be CPER_RECORD_REV */
+ __u8 validation_bits;
+ __u8 reserved; /* must be zero */
+ __u32 flags;
+ uuid_le section_type;
+ uuid_le fru_id;
+ __u32 section_severity;
+ __u8 fru_text[20];
+};
+
+/* Reset to default packing */
+#pragma pack()
+
+#endif
diff -r b622e411eef8 xen/include/xen/spinlock.h
--- a/xen/include/xen/spinlock.h Thu Jun 24 21:56:03 2010 +0100
+++ b/xen/include/xen/spinlock.h Fri Aug 20 17:38:07 2010 +0800
@@ -181,6 +181,13 @@ int _rw_is_write_locked(rwlock_t *lock);
#define spin_is_locked(l) _spin_is_locked(l)
#define spin_trylock(l) _spin_trylock(l)
+#define spin_trylock_irqsave(lock, flags) \
+({ \
+ local_irq_save(flags); \
+ spin_trylock(lock) ? \
+ 1 : ({ local_irq_restore(flags); 0; }); \
+})
+
/* Ensure a lock is quiescent between two critical operations. */
#define spin_barrier(l) _spin_barrier(l)
#define spin_barrier_irq(l) _spin_barrier_irq(l)
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Wisdom of the Ancients
