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Date: Thu, 7 Mar 2013 20:58:28 -0800
From: Yinghai Lu <yinghai@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Renninger <trenn@...e.de>,
Tang Chen <tangchen@...fujitsu.com>
Cc: linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
Pekka Enberg <penberg@...nel.org>,
Jacob Shin <jacob.shin@....com>,
"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org
Subject: [PATCH 02/14] x86, ACPI: Split find/copy from acpi_initrd_override
To parse srat early, we will need to move acpi table probing early.
and to keep acpi_initrd_table_override working, we need to move it
ahead.
But current that is called after init_mem_mapping and relocate_initrd().
Copying need to be after memblock is ready, because it need to allocate
some buffer for acpi tables.
Finding will be moved into head_32.S and head64.c, just like microcode
early scanning.
So split them at first.
Also move down functions declaration to avoid #ifdef in setup.c
Signed-off-by: Yinghai <yinghai@...nel.org>
Cc: Thomas Renninger <trenn@...e.de>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: Jacob Shin <jacob.shin@....com>
Cc: Rafael J. Wysocki <rjw@...k.pl>
Cc: linux-acpi@...r.kernel.org
---
arch/x86/kernel/setup.c | 6 +++---
drivers/acpi/osl.c | 32 +++++++++++++++++++-------------
include/linux/acpi.h | 16 ++++++++--------
3 files changed, 30 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4dcaae7..e2913e9 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1092,9 +1092,9 @@ void __init setup_arch(char **cmdline_p)
reserve_initrd();
-#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
- acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
-#endif
+ acpi_initrd_override_find((void *)initrd_start,
+ initrd_end - initrd_start);
+ acpi_initrd_override_copy();
reserve_crashkernel();
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index c9e36d7..b9d2ff0 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -539,6 +539,7 @@ acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
static u64 acpi_tables_addr;
static int all_tables_size;
+static int table_nr;
/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
u8 __init acpi_table_checksum(u8 *buffer, u32 length)
@@ -569,18 +570,16 @@ static const char * const table_sigs[] = {
#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
-/* Must not increase 10 or needs code modification below */
-#define ACPI_OVERRIDE_TABLES 10
+#define ACPI_OVERRIDE_TABLES 64
+static struct cpio_data __initdata early_initrd_files[ACPI_OVERRIDE_TABLES];
-void __init acpi_initrd_override(void *data, size_t size)
+void __init acpi_initrd_override_find(void *data, size_t size)
{
- int sig, no, table_nr = 0, total_offset = 0;
+ int sig, no;
long offset = 0;
struct acpi_table_header *table;
char cpio_path[32] = "kernel/firmware/acpi/";
struct cpio_data file;
- struct cpio_data early_initrd_files[ACPI_OVERRIDE_TABLES];
- char *p;
if (data == NULL || size == 0)
return;
@@ -621,7 +620,14 @@ void __init acpi_initrd_override(void *data, size_t size)
early_initrd_files[table_nr].size = file.size;
table_nr++;
}
- if (table_nr == 0)
+}
+
+void __init acpi_initrd_override_copy(void)
+{
+ int no, total_offset = 0;
+ char *p;
+
+ if (!table_nr)
return;
/* under 4G at first, then above 4G */
@@ -647,14 +653,14 @@ void __init acpi_initrd_override(void *data, size_t size)
memblock_reserve(acpi_tables_addr, acpi_tables_addr + all_tables_size);
arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
- p = early_ioremap(acpi_tables_addr, all_tables_size);
-
for (no = 0; no < table_nr; no++) {
- memcpy(p + total_offset, early_initrd_files[no].data,
- early_initrd_files[no].size);
- total_offset += early_initrd_files[no].size;
+ size_t size = early_initrd_files[no].size;
+
+ p = early_ioremap(acpi_tables_addr + total_offset, size);
+ memcpy(p, early_initrd_files[no].data, size);
+ early_iounmap(p, size);
+ total_offset += size;
}
- early_iounmap(p, all_tables_size);
}
#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index bcbdd74..1654a241 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -79,14 +79,6 @@ typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);
typedef int (*acpi_tbl_entry_handler)(struct acpi_subtable_header *header,
const unsigned long end);
-#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
-void acpi_initrd_override(void *data, size_t size);
-#else
-static inline void acpi_initrd_override(void *data, size_t size)
-{
-}
-#endif
-
char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
void __acpi_unmap_table(char *map, unsigned long size);
int early_acpi_boot_init(void);
@@ -485,6 +477,14 @@ static inline bool acpi_driver_match_device(struct device *dev,
#endif /* !CONFIG_ACPI */
+#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
+void acpi_initrd_override_find(void *data, size_t size);
+void acpi_initrd_override_copy(void);
+#else
+static inline void acpi_initrd_override_find(void *data, size_t size) { }
+static inline void acpi_initrd_override_copy(void) { }
+#endif
+
#ifdef CONFIG_ACPI
void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
u32 pm1a_ctrl, u32 pm1b_ctrl));
--
1.7.10.4
--
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