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Date: Tue, 23 Sep 2008 13:28:17 -0500
From: Jack Steiner <steiner@....com>
To: mingo@...e.hu, tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] - Add early detection of UV system types
Portions of system boot needs to know if a system is a UV system prior
to genapic initialization. This patch adds a call from acpi_boot_table_init()
to the UV code to parse the MADT to determine if the system is a UV system.
Signed-off-by: Jack Steiner <steiner@....com>
---
arch/x86/kernel/acpi/boot.c | 4 ++++
arch/x86/kernel/genx2apic_uv_x.c | 21 ++++++++++++---------
arch/x86/mm/srat_64.c | 2 +-
include/asm-x86/genapic_64.h | 2 ++
4 files changed, 19 insertions(+), 10 deletions(-)
Index: linux/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux.orig/arch/x86/kernel/acpi/boot.c 2008-09-23 12:55:15.000000000 -0500
+++ linux/arch/x86/kernel/acpi/boot.c 2008-09-23 12:55:19.000000000 -0500
@@ -1667,6 +1667,10 @@ int __init acpi_boot_table_init(void)
acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
+#ifdef CONFIG_X86_64
+ acpi_table_parse(ACPI_SIG_MADT, uv_early_madt_oem_check);
+#endif
+
/*
* blacklist may disable ACPI entirely
*/
Index: linux/arch/x86/kernel/genx2apic_uv_x.c
===================================================================
--- linux.orig/arch/x86/kernel/genx2apic_uv_x.c 2008-09-23 12:55:19.000000000 -0500
+++ linux/arch/x86/kernel/genx2apic_uv_x.c 2008-09-23 12:56:15.000000000 -0500
@@ -18,6 +18,7 @@
#include <linux/bootmem.h>
#include <linux/module.h>
#include <linux/hardirq.h>
+#include <linux/acpi.h>
#include <asm/smp.h>
#include <asm/ipi.h>
#include <asm/genapic.h>
@@ -25,26 +26,28 @@
#include <asm/uv/uv_mmrs.h>
#include <asm/uv/uv_hub.h>
#include <asm/uv/bios.h>
-
DEFINE_PER_CPU(int, x2apic_extra_bits);
static enum uv_system_type uv_system_type;
-static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+int __init uv_early_madt_oem_check(struct acpi_table_header *table)
{
- if (!strcmp(oem_id, "SGI")) {
- if (!strcmp(oem_table_id, "UVL"))
+ if (!strcmp(table->oem_id, "SGI")) {
+ if (!strcmp(table->oem_table_id, "UVL"))
uv_system_type = UV_LEGACY_APIC;
- else if (!strcmp(oem_table_id, "UVX"))
+ else if (!strcmp(table->oem_table_id, "UVX"))
uv_system_type = UV_X2APIC;
- else if (!strcmp(oem_table_id, "UVH")) {
+ else if (!strcmp(table->oem_table_id, "UVH"))
uv_system_type = UV_NON_UNIQUE_APIC;
- return 1;
- }
}
return 0;
}
+static int is_uv_apic(char *oem_id, char *oem_table_id)
+{
+ return uv_system_type == UV_NON_UNIQUE_APIC;
+}
+
enum uv_system_type get_uv_system_type(void)
{
return uv_system_type;
@@ -211,7 +214,7 @@ static void uv_send_IPI_self(int vector)
struct genapic apic_x2apic_uv_x = {
.name = "UV large system",
- .acpi_madt_oem_check = uv_acpi_madt_oem_check,
+ .acpi_madt_oem_check = is_uv_apic,
.int_delivery_mode = dest_Fixed,
.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
.target_cpus = uv_target_cpus,
Index: linux/arch/x86/mm/srat_64.c
===================================================================
--- linux.orig/arch/x86/mm/srat_64.c 2008-09-23 12:55:15.000000000 -0500
+++ linux/arch/x86/mm/srat_64.c 2008-09-23 12:55:19.000000000 -0500
@@ -138,7 +138,7 @@ acpi_numa_processor_affinity_init(struct
return;
}
- if (is_uv_system())
+ if (get_uv_system_type() >= UV_X2APIC)
apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
else
apic_id = pa->apic_id;
Index: linux/include/asm-x86/genapic_64.h
===================================================================
--- linux.orig/include/asm-x86/genapic_64.h 2008-09-23 12:55:15.000000000 -0500
+++ linux/include/asm-x86/genapic_64.h 2008-09-23 12:55:19.000000000 -0500
@@ -46,6 +46,8 @@ extern void apic_send_IPI_self(int vecto
enum uv_system_type {UV_NONE, UV_LEGACY_APIC, UV_X2APIC, UV_NON_UNIQUE_APIC};
extern enum uv_system_type get_uv_system_type(void);
extern int is_uv_system(void);
+struct acpi_table_header;
+extern int uv_early_madt_oem_check(struct acpi_table_header *table);
extern struct genapic apic_x2apic_uv_x;
DECLARE_PER_CPU(int, x2apic_extra_bits);
--
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