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x86, uv: Enable Westmere support on SGI UV

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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>
This commit is contained in:
Russ Anderson 2010-10-26 16:27:28 -05:00 committed by H. Peter Anvin
parent b365a85c68
commit c8f730b1ab
2 changed files with 41 additions and 5 deletions
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21
arch/x86/include/asm/uv/uv_hub.h
View file

@ -5,7 +5,7 @@
*
* SGI UV architectural definitions
*
* Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 2007-2010 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_X86_UV_UV_HUB_H
@ -77,7 +77,8 @@
*
* 1111110000000000
* 5432109876543210
* pppppppppplc0cch
* pppppppppplc0cch Nehalem-EX
* ppppppppplcc0cch Westmere-EX
* sssssssssss
*
* p = pnode bits
@ -148,12 +149,25 @@ struct uv_hub_info_s {
unsigned char m_val;
unsigned char n_val;
struct uv_scir_s scir;
unsigned char apic_pnode_shift;
};
DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
#define uv_hub_info (&__get_cpu_var(__uv_hub_info))
#define uv_cpu_hub_info(cpu) (&per_cpu(__uv_hub_info, cpu))
union uvh_apicid {
unsigned long v;
struct uvh_apicid_s {
unsigned long local_apic_mask : 24;
unsigned long local_apic_shift : 5;
unsigned long unused1 : 3;
unsigned long pnode_mask : 24;
unsigned long pnode_shift : 5;
unsigned long unused2 : 3;
} s;
};
/*
* Local & Global MMR space macros.
* Note: macros are intended to be used ONLY by inline functions
@ -182,6 +196,7 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
#define UV_GLOBAL_MMR64_PNODE_BITS(p) \
(((unsigned long)(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)
#define UVH_APICID 0x002D0E00L
#define UV_APIC_PNODE_SHIFT 6
/* Local Bus from cpu's perspective */
@ -280,7 +295,7 @@ static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
*/
static inline int uv_apicid_to_pnode(int apicid)
{
return (apicid >> UV_APIC_PNODE_SHIFT);
return (apicid >> uv_hub_info->apic_pnode_shift);
}
/*

25
arch/x86/kernel/apic/x2apic_uv_x.c
View file

@ -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;