From: Jack Steiner <steiner@sgi.com>
To: mingo@elte.hu, tglx@linutronix.de
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [RFC 2/8] x86_64: Add functions to determine if platform is a UV platform
Date: Mon, 24 Mar 2008 13:21:10 -0500 [thread overview]
Message-ID: <20080324182110.GA27984@sgi.com> (raw)
Add functions that can be used to determine if an x86_64
system is a SGI "UV" system. UV systems come in 3 types and
are identified by the OEM ID in the MADT.
Signed-off-by: Jack Steiner <steiner@sgi.com>
---
arch/x86/kernel/acpi/boot.c | 4 +---
arch/x86/kernel/genapic_64.c | 25 +++++++++++++++++++++++++
include/asm-x86/genapic_64.h | 5 +++++
3 files changed, 31 insertions(+), 3 deletions(-)
Index: linux/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux.orig/arch/x86/kernel/acpi/boot.c 2008-03-21 09:07:24.000000000 -0500
+++ linux/arch/x86/kernel/acpi/boot.c 2008-03-21 09:16:06.000000000 -0500
@@ -52,9 +52,7 @@ EXPORT_SYMBOL(acpi_disabled);
#ifdef CONFIG_X86_64
#include <asm/proto.h>
-
-static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
-
+#include <asm/genapic.h>
#else /* X86 */
Index: linux/arch/x86/kernel/genapic_64.c
===================================================================
--- linux.orig/arch/x86/kernel/genapic_64.c 2008-03-21 09:13:41.000000000 -0500
+++ linux/arch/x86/kernel/genapic_64.c 2008-03-21 09:35:10.000000000 -0500
@@ -33,6 +33,8 @@ EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid)
struct genapic __read_mostly *genapic = &apic_flat;
+static enum uv_system_type uv_system_type;
+
/*
* Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
*/
@@ -69,3 +71,26 @@ unsigned int get_apic_id(void)
{
return (apic_read(APIC_ID) >> 24) & 0xFFu;
}
+
+int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ if (!strcmp(oem_id, "SGI")) {
+ if (!strcmp(oem_table_id, "UVL"))
+ uv_system_type = UV_LEGACY_APIC;
+ else if (!strcmp(oem_table_id, "UVX"))
+ uv_system_type = UV_X2APIC;
+ else if (!strcmp(oem_table_id, "UVH"))
+ uv_system_type = UV_NON_UNIQUE_APIC;
+ }
+ return 0;
+}
+
+enum uv_system_type get_uv_system_type(void)
+{
+ return uv_system_type;
+}
+
+int is_uv_system(void)
+{
+ return uv_system_type != UV_NONE;
+}
Index: linux/include/asm-x86/genapic_64.h
===================================================================
--- linux.orig/include/asm-x86/genapic_64.h 2008-03-21 09:07:24.000000000 -0500
+++ linux/include/asm-x86/genapic_64.h 2008-03-21 09:34:45.000000000 -0500
@@ -33,5 +33,10 @@ extern struct genapic *genapic;
extern struct genapic apic_flat;
extern struct genapic apic_physflat;
+extern int acpi_madt_oem_check(char *, char *);
+
+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);
#endif
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
reply other threads:[~2008-03-24 18:21 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080324182110.GA27984@sgi.com \
--to=steiner@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox