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Date: Fri, 16 Mar 2012 09:57:14 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Steffen Persvold <sp@...ascale.com>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Daniel J Blueman <daniel@...ascale-asia.com>,
linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH] Use x2apic_supported() in the default_apic_id_valid() function.
On Thu, Mar 15, 2012 at 11:56 PM, Steffen Persvold <sp@...ascale.com> wrote:
> Which one of the two patches I sent, do you (Suresh/Yinghai/others) believe
> is the best/cleanest and works in all cases. I, unfortunately, can't test
> the Intel case as I don't have any available to test on :/
>
> Either patch works fine for NumaChip enabled systems.
>
> If desired I will re-post the patch with the approach you find best, but add
> the apic->apic_id_valid() check in the SRAT code aswell.
Ok, let use second way that Suresh proposed, please repost that
without removing checking in srat.
should like:
From: Steffen Persvold <sp@...ascale.com>
Subject: [PATCH] Added separate apic_id_valid() functions for selected
apic drivers
This allows us to substitute the check in
arch/x86/kernel/acpi/boot.c::acpi_parse_x2apic and avoid feigning the
x2apic cpu feature in the NumaChip apic code.
The following apic drivers have separate apic_id_valid() functions
which will accept x2apic type IDs :
x2apic_phys
x2apic_cluster
x2apic_uv_x
apic_numachip
Signed-off-by: Steffen Persvold <sp@...ascale.com>
---
arch/x86/include/asm/apic.h | 2 +-
arch/x86/include/asm/x2apic.h | 5 +++++
arch/x86/kernel/acpi/boot.c | 2 +-
arch/x86/kernel/apic/apic_numachip.c | 3 +--
arch/x86/kernel/apic/x2apic_cluster.c | 2 +-
arch/x86/kernel/apic/x2apic_phys.c | 2 +-
arch/x86/kernel/apic/x2apic_uv_x.c | 7 ++++++-
arch/x86/mm/srat.c | 2 +-
8 files changed, 17 insertions(+), 8 deletions(-)
Index: linux-2.6/arch/x86/include/asm/apic.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/apic.h
+++ linux-2.6/arch/x86/include/asm/apic.h
@@ -535,7 +535,7 @@ static inline unsigned int read_apic_id(
static inline int default_apic_id_valid(int apicid)
{
- return x2apic_mode || (apicid < 255);
+ return (apicid < 255);
}
extern void default_setup_apic_routing(void);
Index: linux-2.6/arch/x86/include/asm/x2apic.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/x2apic.h
+++ linux-2.6/arch/x86/include/asm/x2apic.h
@@ -18,6 +18,11 @@ static const struct cpumask *x2apic_targ
return cpu_online_mask;
}
+static int x2apic_apic_id_valid(int apicid)
+{
+ return 1;
+}
+
static int x2apic_apic_id_registered(void)
{
return 1;
Index: linux-2.6/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
+++ linux-2.6/arch/x86/kernel/acpi/boot.c
@@ -227,7 +227,7 @@ acpi_parse_x2apic(struct acpi_subtable_h
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
- if (!cpu_has_x2apic && (apic_id >= 0xff) && enabled)
+ if (!apic->apic_id_valid(apic_id) && enabled)
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
else
acpi_register_lapic(apic_id, enabled);
Index: linux-2.6/arch/x86/kernel/apic/apic_numachip.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/apic_numachip.c
+++ linux-2.6/arch/x86/kernel/apic/apic_numachip.c
@@ -229,11 +229,10 @@ static int __init numachip_system_init(v
}
early_initcall(numachip_system_init);
-static int __cpuinit numachip_acpi_madt_oem_check(char *oem_id, char
*oem_table_id)
+static int numachip_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
if (!strncmp(oem_id, "NUMASC", 6)) {
numachip_system = 1;
- setup_force_cpu_cap(X86_FEATURE_X2APIC);
return 1;
}
Index: linux-2.6/arch/x86/kernel/apic/x2apic_cluster.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/x2apic_cluster.c
+++ linux-2.6/arch/x86/kernel/apic/x2apic_cluster.c
@@ -218,7 +218,7 @@ static struct apic apic_x2apic_cluster =
.name = "cluster x2apic",
.probe = x2apic_cluster_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
.irq_delivery_mode = dest_LowestPrio,
Index: linux-2.6/arch/x86/kernel/apic/x2apic_phys.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/x2apic_phys.c
+++ linux-2.6/arch/x86/kernel/apic/x2apic_phys.c
@@ -119,7 +119,7 @@ static struct apic apic_x2apic_phys = {
.name = "physical x2apic",
.probe = x2apic_phys_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
.irq_delivery_mode = dest_Fixed,
Index: linux-2.6/arch/x86/kernel/apic/x2apic_uv_x.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux-2.6/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -266,6 +266,11 @@ static void uv_send_IPI_all(int vector)
uv_send_IPI_mask(cpu_online_mask, vector);
}
+static int uv_apic_id_valid(int apicid)
+{
+ return 1;
+}
+
static int uv_apic_id_registered(void)
{
return 1;
@@ -351,7 +356,7 @@ static struct apic __refdata apic_x2apic
.name = "UV large system",
.probe = uv_probe,
.acpi_madt_oem_check = uv_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
+ .apic_id_valid = uv_apic_id_valid,
.apic_id_registered = uv_apic_id_registered,
.irq_delivery_mode = dest_Fixed,
Index: linux-2.6/arch/x86/mm/srat.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/srat.c
+++ linux-2.6/arch/x86/mm/srat.c
@@ -70,7 +70,7 @@ acpi_numa_x2apic_affinity_init(struct ac
return;
pxm = pa->proximity_domain;
apic_id = pa->apic_id;
- if (!cpu_has_x2apic && (apic_id >= 0xff)) {
+ if (!apic->apic_id_valid(apic_id)) {
printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
pxm, apic_id);
return;
--
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