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Date: Fri, 16 Mar 2012 11:01:01 -0700
From: Suresh Siddha <suresh.b.siddha@...el.com>
To: Yinghai Lu <yinghai@...nel.org>
Cc: Steffen Persvold <sp@...ascale.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 Fri, 2012-03-16 at 09:57 -0700, Yinghai Lu wrote:
> 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>
I have no complaints with this version ;)
Acked-by: Suresh Siddha <suresh.b.siddha@...el.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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