* [PATCH] x86, 64bit: Always make MAX_APICS to 32768 @ 2010-12-31 1:05 Yinghai Lu 2011-01-04 8:48 ` Ingo Molnar 0 siblings, 1 reply; 5+ messages in thread From: Yinghai Lu @ 2010-12-31 1:05 UTC (permalink / raw) To: H. Peter Anvin, Ingo Molnar, Thomas Gleixner; +Cc: linux-kernel@vger.kernel.org Found one x2apic pre-enabled system, x2apic_mode suddenly get corrupted after register some cpus. when compiled CONFIG_NR_CPUS=255 instead of 512 It turns out that generic_processor_info() ==> phyid_set(apicid, phys_cpu_present_map) cause the problem. phys_cpu_present_map is with MAX_APICS bits. and pre-enabled system some cpus apic id > 255. the variable after phys_cpu_present_map may get corrupted.... siliently... ffffffff828e8420 B phys_cpu_present_map ffffffff828e8440 B apic_verbosity ffffffff828e8444 B local_apic_timer_c2_ok ffffffff828e8448 B disable_apic ffffffff828e844c B x2apic_mode ffffffff828e8450 B x2apic_disabled ffffffff828e8454 B num_processors ... Actually phys_cpu_present_map is referenced via apic id, instead index. we should use MAX_LOCAL_APIC instead MAX_APICIS. but that is another header. So just let MAX_APICS equal to MAX_LOCAL_APIC at this point. esp for 64 bit will be 32768 in all cases. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- arch/x86/include/asm/mpspec_def.h | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) Index: linux-2.6/arch/x86/include/asm/mpspec_def.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/mpspec_def.h +++ linux-2.6/arch/x86/include/asm/mpspec_def.h @@ -17,11 +17,7 @@ # define MAX_MPC_ENTRY 1024 # define MAX_APICS 256 #else -# if NR_CPUS <= 255 -# define MAX_APICS 255 -# else -# define MAX_APICS 32768 -# endif +# define MAX_APICS 32768 #endif /* Intel MP Floating Pointer Structure */ ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] x86, 64bit: Always make MAX_APICS to 32768 2010-12-31 1:05 [PATCH] x86, 64bit: Always make MAX_APICS to 32768 Yinghai Lu @ 2011-01-04 8:48 ` Ingo Molnar 2011-01-05 0:38 ` Yinghai Lu 0 siblings, 1 reply; 5+ messages in thread From: Ingo Molnar @ 2011-01-04 8:48 UTC (permalink / raw) To: Yinghai Lu; +Cc: H. Peter Anvin, Thomas Gleixner, linux-kernel@vger.kernel.org * Yinghai Lu <yinghai@kernel.org> wrote: > > Found one x2apic pre-enabled system, x2apic_mode suddenly get corrupted > after register some cpus. when compiled CONFIG_NR_CPUS=255 instead of 512 > > It turns out that generic_processor_info() ==> phyid_set(apicid, phys_cpu_present_map) cause the problem. > > phys_cpu_present_map is with MAX_APICS bits. and pre-enabled system some cpus apic id > 255. > > the variable after phys_cpu_present_map may get corrupted.... siliently... > > ffffffff828e8420 B phys_cpu_present_map > ffffffff828e8440 B apic_verbosity > ffffffff828e8444 B local_apic_timer_c2_ok > ffffffff828e8448 B disable_apic > ffffffff828e844c B x2apic_mode > ffffffff828e8450 B x2apic_disabled > ffffffff828e8454 B num_processors > ... > > Actually phys_cpu_present_map is referenced via apic id, instead index. we should use > MAX_LOCAL_APIC instead MAX_APICIS. but that is another header. > > So just let MAX_APICS equal to MAX_LOCAL_APIC at this point. > esp for 64 bit will be 32768 in all cases. > > Signed-off-by: Yinghai Lu <yinghai@kernel.org> > > --- > arch/x86/include/asm/mpspec_def.h | 6 +----- > 1 file changed, 1 insertion(+), 5 deletions(-) > > Index: linux-2.6/arch/x86/include/asm/mpspec_def.h > =================================================================== > --- linux-2.6.orig/arch/x86/include/asm/mpspec_def.h > +++ linux-2.6/arch/x86/include/asm/mpspec_def.h > @@ -17,11 +17,7 @@ > # define MAX_MPC_ENTRY 1024 > # define MAX_APICS 256 > #else > -# if NR_CPUS <= 255 > -# define MAX_APICS 255 > -# else > -# define MAX_APICS 32768 > -# endif > +# define MAX_APICS 32768 > #endif > > /* Intel MP Floating Pointer Structure */ Please fix the real bug first: the lack of boundary checks when we set phys_cpu_present_map! Then, once that bitmap op is not corrupting nearby variables silently but triggers a fail-safe logic instead (ignoring apics that go outside the supported range? printk-ing a warning?) can we think about upping the limit. But even with the limit upping, please show (in the changelog) a before/after 'size vmlinux' comparison, to make sure that this rather drastic change of the limit does not waste unreasonable amounts of memory. Thanks, Ingo ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] x86, 64bit: Always make MAX_APICS to 32768 2011-01-04 8:48 ` Ingo Molnar @ 2011-01-05 0:38 ` Yinghai Lu 2011-01-05 13:10 ` Ingo Molnar 2011-01-05 14:06 ` [tip:x86/apic] x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion tip-bot for Yinghai Lu 0 siblings, 2 replies; 5+ messages in thread From: Yinghai Lu @ 2011-01-05 0:38 UTC (permalink / raw) To: Ingo Molnar; +Cc: H. Peter Anvin, Thomas Gleixner, linux-kernel@vger.kernel.org On 01/04/2011 12:48 AM, Ingo Molnar wrote: > > * Yinghai Lu <yinghai@kernel.org> wrote: > >> >> Found one x2apic pre-enabled system, x2apic_mode suddenly get corrupted >> after register some cpus. when compiled CONFIG_NR_CPUS=255 instead of 512 >> >> It turns out that generic_processor_info() ==> phyid_set(apicid, phys_cpu_present_map) cause the problem. >> >> phys_cpu_present_map is with MAX_APICS bits. and pre-enabled system some cpus apic id > 255. >> >> the variable after phys_cpu_present_map may get corrupted.... siliently... >> >> ffffffff828e8420 B phys_cpu_present_map >> ffffffff828e8440 B apic_verbosity >> ffffffff828e8444 B local_apic_timer_c2_ok >> ffffffff828e8448 B disable_apic >> ffffffff828e844c B x2apic_mode >> ffffffff828e8450 B x2apic_disabled >> ffffffff828e8454 B num_processors >> ... >> >> Actually phys_cpu_present_map is referenced via apic id, instead index. we should use >> MAX_LOCAL_APIC instead MAX_APICIS. but that is another header. >> >> So just let MAX_APICS equal to MAX_LOCAL_APIC at this point. >> esp for 64 bit will be 32768 in all cases. >> >> Signed-off-by: Yinghai Lu <yinghai@kernel.org> >> >> --- >> arch/x86/include/asm/mpspec_def.h | 6 +----- >> 1 file changed, 1 insertion(+), 5 deletions(-) >> >> Index: linux-2.6/arch/x86/include/asm/mpspec_def.h >> =================================================================== >> --- linux-2.6.orig/arch/x86/include/asm/mpspec_def.h >> +++ linux-2.6/arch/x86/include/asm/mpspec_def.h >> @@ -17,11 +17,7 @@ >> # define MAX_MPC_ENTRY 1024 >> # define MAX_APICS 256 >> #else >> -# if NR_CPUS <= 255 >> -# define MAX_APICS 255 >> -# else >> -# define MAX_APICS 32768 >> -# endif >> +# define MAX_APICS 32768 >> #endif >> >> /* Intel MP Floating Pointer Structure */ > > Please fix the real bug first: the lack of boundary checks when we set > phys_cpu_present_map! real bug is that MAX_APICS and MAX_LOCAL_APIC using is messed up. could be MAX_APICS is from 32bit, and MAX_LOCAL_APIC is from 64bit. > > Then, once that bitmap op is not corrupting nearby variables silently but triggers a > fail-safe logic instead (ignoring apics that go outside the supported range? > printk-ing a warning?) can we think about upping the limit. Using MAX_APICS and MAX_LOCAL_APIC at same time cause confusing. We should just use MAX_LOCAL_APIC instead. If MAX_APICS is not just for apic entries number, we don't need it. NR_CPUS or nr_cpu_ids will do the check for us. > > But even with the limit upping, please show (in the changelog) a before/after 'size > vmlinux' comparison, to make sure that this rather drastic change of the limit does > not waste unreasonable amounts of memory. about 4k for 64bit when NR_CPUS=255. please check if you like following patch instead. or just keep MAX_APICS == MAX_LOCAL_APIC [PATCH] x86: Remove MAX_APICS Found one x2apic pre-enabled system, x2apic_mode suddenly get corrupted after register some cpus. when compiled CONFIG_NR_CPUS=255 instead of 512 It turns out that generic_processor_info() ==> phyid_set(apicid, phys_cpu_present_map) cause the problem. phys_cpu_present_map is with MAX_APICS bits. and pre-enabled system some cpus apic id > 255. the variable after phys_cpu_present_map may get corrupted.... siliently... ffffffff828e8420 B phys_cpu_present_map ffffffff828e8440 B apic_verbosity ffffffff828e8444 B local_apic_timer_c2_ok ffffffff828e8448 B disable_apic ffffffff828e844c B x2apic_mode ffffffff828e8450 B x2apic_disabled ffffffff828e8454 B num_processors ... Actually phys_cpu_present_map is referenced via apic id, instead index. We should use MAX_LOCAL_APIC instead MAX_APICS. For 64 bit will be 32768 in all cases. text data bss dec hex filename 21696943 4193748 12791808 38682499 24e3f83 vmlinux.after 21696943 4193748 12787712 38678403 24e2f83 vmlinux.before bss will increase 4k bytes no change for 32bit. Finally could remove MAX_APCIS that causes confusing. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- arch/x86/include/asm/mpspec.h | 29 +++++++++++------------------ arch/x86/include/asm/mpspec_def.h | 7 ------- arch/x86/kernel/acpi/boot.c | 6 +++--- arch/x86/kernel/apic/io_apic.c | 3 ++- arch/x86/platform/sfi/sfi.c | 4 ++-- arch/x86/platform/visws/visws_quirks.c | 2 +- 6 files changed, 19 insertions(+), 32 deletions(-) Index: linux-2.6/arch/x86/include/asm/mpspec.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/mpspec.h +++ linux-2.6/arch/x86/include/asm/mpspec.h @@ -5,6 +5,7 @@ #include <asm/mpspec_def.h> #include <asm/x86_init.h> +#include <asm/apicdef.h> extern int apic_version[]; extern int pic_mode; @@ -107,7 +108,7 @@ extern int mp_register_gsi(struct device 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(unsig 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); Index: linux-2.6/arch/x86/include/asm/mpspec_def.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/mpspec_def.h +++ linux-2.6/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 */ 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 @@ -903,13 +903,13 @@ static int __init acpi_parse_madt_lapic_ 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"); Index: linux-2.6/arch/x86/kernel/apic/io_apic.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c +++ linux-2.6/arch/x86/kernel/apic/io_apic.c @@ -4087,7 +4087,8 @@ 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); Index: linux-2.6/arch/x86/platform/sfi/sfi.c =================================================================== --- linux-2.6.orig/arch/x86/platform/sfi/sfi.c +++ linux-2.6/arch/x86/platform/sfi/sfi.c @@ -37,9 +37,9 @@ static unsigned long sfi_lapic_addr __in /* 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; } Index: linux-2.6/arch/x86/platform/visws/visws_quirks.c =================================================================== --- linux-2.6.orig/arch/x86/platform/visws/visws_quirks.c +++ linux-2.6/arch/x86/platform/visws/visws_quirks.c @@ -171,7 +171,7 @@ static void __init MP_processor_info(str 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; } ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] x86, 64bit: Always make MAX_APICS to 32768 2011-01-05 0:38 ` Yinghai Lu @ 2011-01-05 13:10 ` Ingo Molnar 2011-01-05 14:06 ` [tip:x86/apic] x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion tip-bot for Yinghai Lu 1 sibling, 0 replies; 5+ messages in thread From: Ingo Molnar @ 2011-01-05 13:10 UTC (permalink / raw) To: Yinghai Lu Cc: H. Peter Anvin, Thomas Gleixner, linux-kernel@vger.kernel.org, Eric W. Biederman * Yinghai Lu <yinghai@kernel.org> wrote: > > Please fix the real bug first: the lack of boundary checks when we set > > phys_cpu_present_map! > > real bug is that MAX_APICS and MAX_LOCAL_APIC using is messed up. > > could be MAX_APICS is from 32bit, and MAX_LOCAL_APIC is from 64bit. Indeed - nice patch! Thanks, Ingo ^ permalink raw reply [flat|nested] 5+ messages in thread
* [tip:x86/apic] x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion 2011-01-05 0:38 ` Yinghai Lu 2011-01-05 13:10 ` Ingo Molnar @ 2011-01-05 14:06 ` tip-bot for Yinghai Lu 1 sibling, 0 replies; 5+ messages in thread From: tip-bot for Yinghai Lu @ 2011-01-05 14:06 UTC (permalink / raw) To: linux-tip-commits Cc: linux-kernel, hpa, mingo, yinghai, ebiederm, tglx, hpa, mingo Commit-ID: cb2ded37fd2e1039f96c8c892da024a8f033add5 Gitweb: http://git.kernel.org/tip/cb2ded37fd2e1039f96c8c892da024a8f033add5 Author: Yinghai Lu <yinghai@kernel.org> AuthorDate: Tue, 4 Jan 2011 16:38:52 -0800 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Wed, 5 Jan 2011 14:09:23 +0100 x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion Found one x2apic pre-enabled system, x2apic_mode suddenly get corrupted after register some cpus, when compiled CONFIG_NR_CPUS=255 instead of 512. It turns out that generic_processor_info() ==> phyid_set(apicid, phys_cpu_present_map) causes the problem. phys_cpu_present_map is sized by MAX_APICS bits, and pre-enabled system some cpus have an apic id > 255. The variable after phys_cpu_present_map may get corrupted silently: ffffffff828e8420 B phys_cpu_present_map ffffffff828e8440 B apic_verbosity ffffffff828e8444 B local_apic_timer_c2_ok ffffffff828e8448 B disable_apic ffffffff828e844c B x2apic_mode ffffffff828e8450 B x2apic_disabled ffffffff828e8454 B num_processors ... Actually phys_cpu_present_map is referenced via apic id, instead index. We should use MAX_LOCAL_APIC instead MAX_APICS. For 64-bit it will be 32768 in all cases. BSS will increase by 4k bytes on 64-bit: text data bss dec filename 21696943 4193748 12787712 38678403 vmlinux.before 21696943 4193748 12791808 38682499 vmlinux.after No change on 32bit. Finally we can remove MAX_APCIS that was rather confusing. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> LKML-Reference: <4D23BD9C.3070102@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- arch/x86/include/asm/mpspec.h | 29 +++++++++++------------------ arch/x86/include/asm/mpspec_def.h | 7 ------- arch/x86/kernel/acpi/boot.c | 6 +++--- arch/x86/kernel/apic/io_apic.c | 3 ++- arch/x86/platform/sfi/sfi.c | 4 ++-- arch/x86/platform/visws/visws_quirks.c | 2 +- 6 files changed, 19 insertions(+), 32 deletions(-) diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h index 7c1aebf..0c90dd9 100644 --- a/arch/x86/include/asm/mpspec.h +++ b/arch/x86/include/asm/mpspec.h @@ -5,6 +5,7 @@ #include <asm/mpspec_def.h> #include <asm/x86_init.h> +#include <asm/apicdef.h> extern int apic_version[]; extern int pic_mode; @@ -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 7235e5f..17c8090 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -915,13 +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/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 943d814..2fc696e 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -4109,7 +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/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; } ^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-01-05 14:07 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2010-12-31 1:05 [PATCH] x86, 64bit: Always make MAX_APICS to 32768 Yinghai Lu 2011-01-04 8:48 ` Ingo Molnar 2011-01-05 0:38 ` Yinghai Lu 2011-01-05 13:10 ` Ingo Molnar 2011-01-05 14:06 ` [tip:x86/apic] x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion tip-bot for Yinghai Lu
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.