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Date: Thu, 6 Jan 2011 10:44:23 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/apic changes for v2.6.38
Linus,
Please pull the latest x86-apic-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-apic-for-linus
out-of-topic modifications in x86-apic-for-linus:
-------------------------------------------------
drivers/acpi/numa.c # d3bd058: x86, acpi: Parse all SRAT cpu ent
Thanks,
Ingo
------------------>
Sebastian Andrzej Siewior (1):
x86: io_apic: Split setup_ioapic_ids_from_mpc()
Thomas Gleixner (3):
x86: Allow platforms to force enable apic
x86: apic: Move probe_nr_irqs_gsi() into ioapic_init_mappings()
x86: io_apic: Fix CONFIG_X86_IO_APIC=n breakage
Yinghai Lu (3):
x86, acpi: Add MAX_LOCAL_APIC for 32bit
x86, acpi: Parse all SRAT cpu entries even above the cpu number limitation
x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion
arch/x86/include/asm/apic.h | 1 +
arch/x86/include/asm/apicdef.h | 1 +
arch/x86/include/asm/io_apic.h | 8 +--
arch/x86/include/asm/mpspec.h | 31 ++++-------
arch/x86/include/asm/mpspec_def.h | 7 ---
arch/x86/kernel/acpi/boot.c | 11 +++-
arch/x86/kernel/apic/apic.c | 89 ++++++++++++++++++++------------
arch/x86/kernel/apic/io_apic.c | 37 ++++++++-----
arch/x86/kernel/setup.c | 5 +--
arch/x86/mm/srat_32.c | 1 +
arch/x86/mm/srat_64.c | 10 ++++
arch/x86/platform/sfi/sfi.c | 4 +-
arch/x86/platform/visws/visws_quirks.c | 2 +-
drivers/acpi/numa.c | 14 ++++-
14 files changed, 129 insertions(+), 92 deletions(-)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index f6ce0bd..cf12007 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -238,6 +238,7 @@ extern void setup_boot_APIC_clock(void);
extern void setup_secondary_APIC_clock(void);
extern int APIC_init_uniprocessor(void);
extern void enable_NMI_through_LVT0(void);
+extern int apic_force_enable(void);
/*
* On 32bit this is mach-xxx local
diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index a859ca4..47a30ff 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -145,6 +145,7 @@
#ifdef CONFIG_X86_32
# define MAX_IO_APICS 64
+# define MAX_LOCAL_APIC 256
#else
# define MAX_IO_APICS 128
# define MAX_LOCAL_APIC 32768
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index a6b28d0..0c5ca4e 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -159,7 +159,7 @@ struct io_apic_irq_attr;
extern int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr);
void setup_IO_APIC_irq_extra(u32 gsi);
-extern void ioapic_init_mappings(void);
+extern void ioapic_and_gsi_init(void);
extern void ioapic_insert_resources(void);
extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
@@ -168,10 +168,9 @@ extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
-extern void probe_nr_irqs_gsi(void);
extern int get_nr_irqs_gsi(void);
-
extern void setup_ioapic_ids_from_mpc(void);
+extern void setup_ioapic_ids_from_mpc_nocheck(void);
struct mp_ioapic_gsi{
u32 gsi_base;
@@ -189,9 +188,8 @@ extern void __init pre_init_apic_IRQ0(void);
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static const int timer_through_8259 = 0;
-static inline void ioapic_init_mappings(void) { }
+static inline void ioapic_and_gsi_init(void) { }
static inline void ioapic_insert_resources(void) { }
-static inline void probe_nr_irqs_gsi(void) { }
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index c82868e..0c90dd9 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -5,8 +5,9 @@
#include <asm/mpspec_def.h>
#include <asm/x86_init.h>
+#include <asm/apicdef.h>
-extern int apic_version[MAX_APICS];
+extern int apic_version[];
extern int pic_mode;
#ifdef CONFIG_X86_32
@@ -107,7 +108,7 @@ extern int mp_register_gsi(struct device *dev, u32 gsi, int edge_level,
int active_high_low);
#endif /* CONFIG_ACPI */
-#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_APICS)
+#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_LOCAL_APIC)
struct physid_mask {
unsigned long mask[PHYSID_ARRAY_SIZE];
@@ -122,31 +123,31 @@ typedef struct physid_mask physid_mask_t;
test_and_set_bit(physid, (map).mask)
#define physids_and(dst, src1, src2) \
- bitmap_and((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
+ bitmap_and((dst).mask, (src1).mask, (src2).mask, MAX_LOCAL_APIC)
#define physids_or(dst, src1, src2) \
- bitmap_or((dst).mask, (src1).mask, (src2).mask, MAX_APICS)
+ bitmap_or((dst).mask, (src1).mask, (src2).mask, MAX_LOCAL_APIC)
#define physids_clear(map) \
- bitmap_zero((map).mask, MAX_APICS)
+ bitmap_zero((map).mask, MAX_LOCAL_APIC)
#define physids_complement(dst, src) \
- bitmap_complement((dst).mask, (src).mask, MAX_APICS)
+ bitmap_complement((dst).mask, (src).mask, MAX_LOCAL_APIC)
#define physids_empty(map) \
- bitmap_empty((map).mask, MAX_APICS)
+ bitmap_empty((map).mask, MAX_LOCAL_APIC)
#define physids_equal(map1, map2) \
- bitmap_equal((map1).mask, (map2).mask, MAX_APICS)
+ bitmap_equal((map1).mask, (map2).mask, MAX_LOCAL_APIC)
#define physids_weight(map) \
- bitmap_weight((map).mask, MAX_APICS)
+ bitmap_weight((map).mask, MAX_LOCAL_APIC)
#define physids_shift_right(d, s, n) \
- bitmap_shift_right((d).mask, (s).mask, n, MAX_APICS)
+ bitmap_shift_right((d).mask, (s).mask, n, MAX_LOCAL_APIC)
#define physids_shift_left(d, s, n) \
- bitmap_shift_left((d).mask, (s).mask, n, MAX_APICS)
+ bitmap_shift_left((d).mask, (s).mask, n, MAX_LOCAL_APIC)
static inline unsigned long physids_coerce(physid_mask_t *map)
{
@@ -159,14 +160,6 @@ static inline void physids_promote(unsigned long physids, physid_mask_t *map)
map->mask[0] = physids;
}
-/* Note: will create very large stack frames if physid_mask_t is big */
-#define physid_mask_of_physid(physid) \
- ({ \
- physid_mask_t __physid_mask = PHYSID_MASK_NONE; \
- physid_set(physid, __physid_mask); \
- __physid_mask; \
- })
-
static inline void physid_set_mask_of_physid(int physid, physid_mask_t *map)
{
physids_clear(*map);
diff --git a/arch/x86/include/asm/mpspec_def.h b/arch/x86/include/asm/mpspec_def.h
index 4a7f96d..c0a955a 100644
--- a/arch/x86/include/asm/mpspec_def.h
+++ b/arch/x86/include/asm/mpspec_def.h
@@ -15,13 +15,6 @@
#ifdef CONFIG_X86_32
# define MAX_MPC_ENTRY 1024
-# define MAX_APICS 256
-#else
-# if NR_CPUS <= 255
-# define MAX_APICS 255
-# else
-# define MAX_APICS 32768
-# endif
#endif
/* Intel MP Floating Pointer Structure */
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 71232b9..17c8090 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -198,6 +198,11 @@ static void __cpuinit acpi_register_lapic(int id, u8 enabled)
{
unsigned int ver = 0;
+ if (id >= (MAX_LOCAL_APIC-1)) {
+ printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
+ return;
+ }
+
if (!enabled) {
++disabled_cpus;
return;
@@ -910,13 +915,13 @@ static int __init acpi_parse_madt_lapic_entries(void)
acpi_register_lapic_address(acpi_lapic_addr);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
- acpi_parse_sapic, MAX_APICS);
+ acpi_parse_sapic, MAX_LOCAL_APIC);
if (!count) {
x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
- acpi_parse_x2apic, MAX_APICS);
+ acpi_parse_x2apic, MAX_LOCAL_APIC);
count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
- acpi_parse_lapic, MAX_APICS);
+ acpi_parse_lapic, MAX_LOCAL_APIC);
}
if (!count && !x2count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 7821813..30fdce8 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1538,13 +1538,60 @@ static int __init detect_init_APIC(void)
return 0;
}
#else
+
+static int apic_verify(void)
+{
+ u32 features, h, l;
+
+ /*
+ * The APIC feature bit should now be enabled
+ * in `cpuid'
+ */
+ features = cpuid_edx(1);
+ if (!(features & (1 << X86_FEATURE_APIC))) {
+ pr_warning("Could not enable APIC!\n");
+ return -1;
+ }
+ set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+
+ /* The BIOS may have set up the APIC at some other address */
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ if (l & MSR_IA32_APICBASE_ENABLE)
+ mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
+
+ pr_info("Found and enabled local APIC!\n");
+ return 0;
+}
+
+int apic_force_enable(void)
+{
+ u32 h, l;
+
+ if (disable_apic)
+ return -1;
+
+ /*
+ * Some BIOSes disable the local APIC in the APIC_BASE
+ * MSR. This can only be done in software for Intel P6 or later
+ * and AMD K7 (Model > 1) or later.
+ */
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ if (!(l & MSR_IA32_APICBASE_ENABLE)) {
+ pr_info("Local APIC disabled by BIOS -- reenabling.\n");
+ l &= ~MSR_IA32_APICBASE_BASE;
+ l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
+ wrmsr(MSR_IA32_APICBASE, l, h);
+ enabled_via_apicbase = 1;
+ }
+ return apic_verify();
+}
+
/*
* Detect and initialize APIC
*/
static int __init detect_init_APIC(void)
{
- u32 h, l, features;
-
/* Disabled by kernel option? */
if (disable_apic)
return -1;
@@ -1574,38 +1621,12 @@ static int __init detect_init_APIC(void)
"you can enable it with \"lapic\"\n");
return -1;
}
- /*
- * Some BIOSes disable the local APIC in the APIC_BASE
- * MSR. This can only be done in software for Intel P6 or later
- * and AMD K7 (Model > 1) or later.
- */
- rdmsr(MSR_IA32_APICBASE, l, h);
- if (!(l & MSR_IA32_APICBASE_ENABLE)) {
- pr_info("Local APIC disabled by BIOS -- reenabling.\n");
- l &= ~MSR_IA32_APICBASE_BASE;
- l |= MSR_IA32_APICBASE_ENABLE | APIC_DEFAULT_PHYS_BASE;
- wrmsr(MSR_IA32_APICBASE, l, h);
- enabled_via_apicbase = 1;
- }
- }
- /*
- * The APIC feature bit should now be enabled
- * in `cpuid'
- */
- features = cpuid_edx(1);
- if (!(features & (1 << X86_FEATURE_APIC))) {
- pr_warning("Could not enable APIC!\n");
- return -1;
+ if (apic_force_enable())
+ return -1;
+ } else {
+ if (apic_verify())
+ return -1;
}
- set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-
- /* The BIOS may have set up the APIC at some other address */
- rdmsr(MSR_IA32_APICBASE, l, h);
- if (l & MSR_IA32_APICBASE_ENABLE)
- mp_lapic_addr = l & MSR_IA32_APICBASE_BASE;
-
- pr_info("Found and enabled local APIC!\n");
apic_pm_activate();
@@ -1693,7 +1714,7 @@ void __init init_apic_mappings(void)
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
-int apic_version[MAX_APICS];
+int apic_version[MAX_LOCAL_APIC];
int __init APIC_init_uniprocessor(void)
{
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index fadcd74..2fc696e 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1934,8 +1934,7 @@ void disable_IO_APIC(void)
*
* by Matt Domsch <Matt_Domsch@...l.com> Tue Dec 21 12:25:05 CST 1999
*/
-
-void __init setup_ioapic_ids_from_mpc(void)
+void __init setup_ioapic_ids_from_mpc_nocheck(void)
{
union IO_APIC_reg_00 reg_00;
physid_mask_t phys_id_present_map;
@@ -1944,15 +1943,6 @@ void __init setup_ioapic_ids_from_mpc(void)
unsigned char old_id;
unsigned long flags;
- if (acpi_ioapic)
- return;
- /*
- * Don't check I/O APIC IDs for xAPIC systems. They have
- * no meaning without the serial APIC bus.
- */
- if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
- || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
- return;
/*
* This is broken; anything with a real cpu count has to
* circumvent this idiocy regardless.
@@ -2006,7 +1996,6 @@ void __init setup_ioapic_ids_from_mpc(void)
physids_or(phys_id_present_map, phys_id_present_map, tmp);
}
-
/*
* We need to adjust the IRQ routing table
* if the ID changed.
@@ -2042,6 +2031,21 @@ void __init setup_ioapic_ids_from_mpc(void)
apic_printk(APIC_VERBOSE, " ok.\n");
}
}
+
+void __init setup_ioapic_ids_from_mpc(void)
+{
+
+ if (acpi_ioapic)
+ return;
+ /*
+ * Don't check I/O APIC IDs for xAPIC systems. They have
+ * no meaning without the serial APIC bus.
+ */
+ if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return;
+ setup_ioapic_ids_from_mpc_nocheck();
+}
#endif
int no_timer_check __initdata;
@@ -3639,7 +3643,7 @@ int __init io_apic_get_redir_entries (int ioapic)
return reg_01.bits.entries + 1;
}
-void __init probe_nr_irqs_gsi(void)
+static void __init probe_nr_irqs_gsi(void)
{
int nr;
@@ -3956,7 +3960,7 @@ static struct resource * __init ioapic_setup_resources(int nr_ioapics)
return res;
}
-void __init ioapic_init_mappings(void)
+void __init ioapic_and_gsi_init(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
struct resource *ioapic_res;
@@ -3994,6 +3998,8 @@ fake_ioapic_page:
ioapic_res->end = ioapic_phys + IO_APIC_SLOT_SIZE - 1;
ioapic_res++;
}
+
+ probe_nr_irqs_gsi();
}
void __init ioapic_insert_resources(void)
@@ -4103,7 +4109,8 @@ void __init pre_init_apic_IRQ0(void)
printk(KERN_INFO "Early APIC setup for system timer0\n");
#ifndef CONFIG_SMP
- phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
+ physid_set_mask_of_physid(boot_cpu_physical_apicid,
+ &phys_cpu_present_map);
#endif
/* Make sure the irq descriptor is set up */
cfg = alloc_irq_and_cfg_at(0, 0);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index a0f52af..a25ce88 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1045,10 +1045,7 @@ void __init setup_arch(char **cmdline_p)
#endif
init_apic_mappings();
- ioapic_init_mappings();
-
- /* need to wait for io_apic is mapped */
- probe_nr_irqs_gsi();
+ ioapic_and_gsi_init();
kvm_guest_init();
diff --git a/arch/x86/mm/srat_32.c b/arch/x86/mm/srat_32.c
index a17dffd..f164345 100644
--- a/arch/x86/mm/srat_32.c
+++ b/arch/x86/mm/srat_32.c
@@ -92,6 +92,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *cpu_affinity)
/* mark this node as "seen" in node bitmap */
BMAP_SET(pxm_bitmap, cpu_affinity->proximity_domain_lo);
+ /* don't need to check apic_id here, because it is always 8 bits */
apicid_to_pxm[cpu_affinity->apic_id] = cpu_affinity->proximity_domain_lo;
printk(KERN_DEBUG "CPU %02x in proximity domain %02x\n",
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index a35cb9d..171a0aa 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -134,6 +134,10 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
}
apic_id = pa->apic_id;
+ if (apic_id >= MAX_LOCAL_APIC) {
+ printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
+ return;
+ }
apicid_to_node[apic_id] = node;
node_set(node, cpu_nodes_parsed);
acpi_numa = 1;
@@ -168,6 +172,12 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
else
apic_id = pa->apic_id;
+
+ if (apic_id >= MAX_LOCAL_APIC) {
+ printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
+ return;
+ }
+
apicid_to_node[apic_id] = node;
node_set(node, cpu_nodes_parsed);
acpi_numa = 1;
diff --git a/arch/x86/platform/sfi/sfi.c b/arch/x86/platform/sfi/sfi.c
index dd4c281..ca54875 100644
--- a/arch/x86/platform/sfi/sfi.c
+++ b/arch/x86/platform/sfi/sfi.c
@@ -48,9 +48,9 @@ static void __init mp_sfi_register_lapic_address(unsigned long address)
/* All CPUs enumerated by SFI must be present and enabled */
static void __cpuinit mp_sfi_register_lapic(u8 id)
{
- if (MAX_APICS - id <= 0) {
+ if (MAX_LOCAL_APIC - id <= 0) {
pr_warning("Processor #%d invalid (max %d)\n",
- id, MAX_APICS);
+ id, MAX_LOCAL_APIC);
return;
}
diff --git a/arch/x86/platform/visws/visws_quirks.c b/arch/x86/platform/visws/visws_quirks.c
index 3371bd0..6320376 100644
--- a/arch/x86/platform/visws/visws_quirks.c
+++ b/arch/x86/platform/visws/visws_quirks.c
@@ -171,7 +171,7 @@ static void __init MP_processor_info(struct mpc_cpu *m)
ver = m->apicver;
if ((ver >= 0x14 && m->apicid >= 0xff) || m->apicid >= 0xf) {
printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
- m->apicid, MAX_APICS);
+ m->apicid, MAX_LOCAL_APIC);
return;
}
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 5718566..d9926af 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -275,13 +275,23 @@ acpi_table_parse_srat(enum acpi_srat_type id,
int __init acpi_numa_init(void)
{
int ret = 0;
+ int nr_cpu_entries = nr_cpu_ids;
+
+#ifdef CONFIG_X86
+ /*
+ * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
+ * SRAT cpu entries could have different order with that in MADT.
+ * So go over all cpu entries in SRAT to get apicid to node mapping.
+ */
+ nr_cpu_entries = MAX_LOCAL_APIC;
+#endif
/* SRAT: Static Resource Affinity Table */
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
- acpi_parse_x2apic_affinity, nr_cpu_ids);
+ acpi_parse_x2apic_affinity, nr_cpu_entries);
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
- acpi_parse_processor_affinity, nr_cpu_ids);
+ acpi_parse_processor_affinity, nr_cpu_entries);
ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
acpi_parse_memory_affinity,
NR_NODE_MEMBLKS);
--
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