diff options
| author | Russ Anderson <rja@sgi.com> | 2010-10-26 16:27:28 -0500 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-10-26 15:15:28 -0700 |
| commit | c8f730b1ab825f06733e1c074264f0078721f365 (patch) | |
| tree | 90f5b48ececb4020beeb3b6612e994f3e8f1f594 /arch/x86/kernel/apic | |
| parent | b365a85c68161ea5db5476eb8845a91ceb1777ea (diff) | |
x86, uv: Enable Westmere support on SGI UV
Enable Westmere support on SGI UV. The UV initialization code is dependent on
the APICID bits. Westmere-EX uses different APIC bit mapping than Nehalem-EX.
This code reads the apic shift value from a UV MMR to do the proper bit
decoding to determint the pnode.
Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20101026212728.GB15071@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index f744f54cb24..0a2918eaab3 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -5,7 +5,7 @@ * * SGI UV APIC functions (note: not an Intel compatible APIC) * - * Copyright (C) 2007-2009 Silicon Graphics, Inc. All rights reserved. + * Copyright (C) 2007-2010 Silicon Graphics, Inc. All rights reserved. */ #include <linux/cpumask.h> #include <linux/hardirq.h> @@ -41,6 +41,7 @@ DEFINE_PER_CPU(int, x2apic_extra_bits); static enum uv_system_type uv_system_type; static u64 gru_start_paddr, gru_end_paddr; +static union uvh_apicid uvh_apicid; int uv_min_hub_revision_id; EXPORT_SYMBOL_GPL(uv_min_hub_revision_id); static DEFINE_SPINLOCK(uv_nmi_lock); @@ -70,6 +71,22 @@ static int early_get_nodeid(void) return node_id.s.node_id; } +static int __init early_get_apic_pnode_shift(void) +{ + unsigned long *mmr; + + mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_APICID, sizeof(*mmr)); + uvh_apicid.v = *mmr; + early_iounmap(mmr, sizeof(*mmr)); + if (!uvh_apicid.v) + /* + * Old bios, use default value + */ + uvh_apicid.s.pnode_shift = UV_APIC_PNODE_SHIFT; + + return uvh_apicid.s.pnode_shift; +} + static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) { int nodeid; @@ -84,7 +101,7 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) uv_system_type = UV_X2APIC; else if (!strcmp(oem_table_id, "UVH")) { __get_cpu_var(x2apic_extra_bits) = - nodeid << (UV_APIC_PNODE_SHIFT - 1); + nodeid << (early_get_apic_pnode_shift() - 1); uv_system_type = UV_NON_UNIQUE_APIC; return 1; } @@ -716,6 +733,10 @@ void __init uv_system_init(void) int apicid = per_cpu(x86_cpu_to_apicid, cpu); nid = cpu_to_node(cpu); + /* + * apic_pnode_shift must be set before calling uv_apicid_to_pnode(); + */ + uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift; pnode = uv_apicid_to_pnode(apicid); blade = boot_pnode_to_blade(pnode); lcpu = uv_blade_info[blade].nr_possible_cpus; |