Re: [PATCH] 2.6.12-rc1-mm4 x86_64 genapic update
On Fri, Apr 01, 2005 at 12:37:27PM -0500, Jason Davis wrote: > Hello, > > x86_64 genapic mechanism should be aware of machines that use physical APIC > mode regardless of how many clusters/processors are detected. ACPI 3.0 FADT > makes this determination very simple by providing a feature flag > "force_apic_physical_destination_mode" to state whether the machine > unconditionally uses physical APIC mode. Unisys' next generation x86_64 > ES7000 will need to utilize this FADT feature flag in order to boot the > x86_64 kernel in the correct APIC mode. This patch has been tested on both > x86_64 commodity and ES7000 boxes. Patch is ok for me. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] 2.6.12-rc1-mm4 x86_64 genapic update
On Fri, Apr 01, 2005 at 12:37:27PM -0500, Jason Davis wrote: Hello, x86_64 genapic mechanism should be aware of machines that use physical APIC mode regardless of how many clusters/processors are detected. ACPI 3.0 FADT makes this determination very simple by providing a feature flag force_apic_physical_destination_mode to state whether the machine unconditionally uses physical APIC mode. Unisys' next generation x86_64 ES7000 will need to utilize this FADT feature flag in order to boot the x86_64 kernel in the correct APIC mode. This patch has been tested on both x86_64 commodity and ES7000 boxes. Patch is ok for me. -Andi - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] 2.6.12-rc1-mm4 x86_64 genapic update
Hello,
x86_64 genapic mechanism should be aware of machines that use physical APIC mode
regardless of how many clusters/processors are detected. ACPI 3.0 FADT makes this
determination very simple by providing a feature flag
"force_apic_physical_destination_mode" to state whether the machine
unconditionally uses physical APIC mode. Unisys' next generation x86_64 ES7000 will need
to utilize this FADT feature flag in order to boot the x86_64 kernel in the correct APIC
mode. This patch has been tested on both x86_64 commodity and ES7000 boxes.
Signed-off-by: Jason Davis <[EMAIL PROTECTED]>
diff -Naurp linux-2.6.12-rc1-mm4/arch/i386/kernel/acpi/boot.c
linux-2.6.12-rc1-mm4-genapic/arch/i386/kernel/acpi/boot.c
--- linux-2.6.12-rc1-mm4/arch/i386/kernel/acpi/boot.c 2005-03-02
02:38:25.0 -0500
+++ linux-2.6.12-rc1-mm4-genapic/arch/i386/kernel/acpi/boot.c 2005-03-31
18:15:09.606679144 -0500
@@ -608,6 +608,10 @@ static int __init acpi_parse_fadt(unsign
acpi_fadt.sci_int = fadt->sci_int;
#endif
+ /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
+ acpi_fadt.revision = fadt->revision;
+ acpi_fadt.force_apic_physical_destination_mode =
fadt->force_apic_physical_destination_mode;
+
#ifdef CONFIG_X86_PM_TIMER
/* detect the location of the ACPI PM Timer */
if (fadt->revision >= FADT2_REVISION_ID) {
diff -Naurp linux-2.6.12-rc1-mm4/arch/x86_64/kernel/genapic.c
linux-2.6.12-rc1-mm4-genapic/arch/x86_64/kernel/genapic.c
--- linux-2.6.12-rc1-mm4/arch/x86_64/kernel/genapic.c 2005-03-02
02:38:37.0 -0500
+++ linux-2.6.12-rc1-mm4-genapic/arch/x86_64/kernel/genapic.c 2005-03-31
18:15:09.607678992 -0500
@@ -20,6 +20,10 @@
#include
#include
+#if defined(CONFIG_ACPI_BUS)
+#include
+#endif
+
/* which logical CPU number maps to which CPU (physical APIC ID) */
u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
EXPORT_SYMBOL(x86_cpu_to_apicid);
@@ -47,6 +51,18 @@ void __init clustered_apic_check(void)
goto print;
}
+#if defined(CONFIG_ACPI_BUS)
+ /*
+* Some x86_64 machines use physical APIC mode regardless of how many
+* procs/clusters are present (x86_64 ES7000 is an example).
+*/
+ if (acpi_fadt.revision > FADT2_REVISION_ID)
+ if (acpi_fadt.force_apic_physical_destination_mode) {
+ genapic = _cluster;
+ goto print;
+ }
+#endif
+
memset(cluster_cnt, 0, sizeof(cluster_cnt));
for (i = 0; i < NR_CPUS; i++) {
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCH] 2.6.12-rc1-mm4 x86_64 genapic update
Hello,
x86_64 genapic mechanism should be aware of machines that use physical APIC mode
regardless of how many clusters/processors are detected. ACPI 3.0 FADT makes this
determination very simple by providing a feature flag
force_apic_physical_destination_mode to state whether the machine
unconditionally uses physical APIC mode. Unisys' next generation x86_64 ES7000 will need
to utilize this FADT feature flag in order to boot the x86_64 kernel in the correct APIC
mode. This patch has been tested on both x86_64 commodity and ES7000 boxes.
Signed-off-by: Jason Davis [EMAIL PROTECTED]
diff -Naurp linux-2.6.12-rc1-mm4/arch/i386/kernel/acpi/boot.c
linux-2.6.12-rc1-mm4-genapic/arch/i386/kernel/acpi/boot.c
--- linux-2.6.12-rc1-mm4/arch/i386/kernel/acpi/boot.c 2005-03-02
02:38:25.0 -0500
+++ linux-2.6.12-rc1-mm4-genapic/arch/i386/kernel/acpi/boot.c 2005-03-31
18:15:09.606679144 -0500
@@ -608,6 +608,10 @@ static int __init acpi_parse_fadt(unsign
acpi_fadt.sci_int = fadt-sci_int;
#endif
+ /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
+ acpi_fadt.revision = fadt-revision;
+ acpi_fadt.force_apic_physical_destination_mode =
fadt-force_apic_physical_destination_mode;
+
#ifdef CONFIG_X86_PM_TIMER
/* detect the location of the ACPI PM Timer */
if (fadt-revision = FADT2_REVISION_ID) {
diff -Naurp linux-2.6.12-rc1-mm4/arch/x86_64/kernel/genapic.c
linux-2.6.12-rc1-mm4-genapic/arch/x86_64/kernel/genapic.c
--- linux-2.6.12-rc1-mm4/arch/x86_64/kernel/genapic.c 2005-03-02
02:38:37.0 -0500
+++ linux-2.6.12-rc1-mm4-genapic/arch/x86_64/kernel/genapic.c 2005-03-31
18:15:09.607678992 -0500
@@ -20,6 +20,10 @@
#include asm/smp.h
#include asm/ipi.h
+#if defined(CONFIG_ACPI_BUS)
+#include acpi/acpi_bus.h
+#endif
+
/* which logical CPU number maps to which CPU (physical APIC ID) */
u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
EXPORT_SYMBOL(x86_cpu_to_apicid);
@@ -47,6 +51,18 @@ void __init clustered_apic_check(void)
goto print;
}
+#if defined(CONFIG_ACPI_BUS)
+ /*
+* Some x86_64 machines use physical APIC mode regardless of how many
+* procs/clusters are present (x86_64 ES7000 is an example).
+*/
+ if (acpi_fadt.revision FADT2_REVISION_ID)
+ if (acpi_fadt.force_apic_physical_destination_mode) {
+ genapic = apic_cluster;
+ goto print;
+ }
+#endif
+
memset(cluster_cnt, 0, sizeof(cluster_cnt));
for (i = 0; i NR_CPUS; i++) {
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
