From ddf9499b3d1e655f212f22b0a703506fcac90b25 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Mon, 23 Feb 2009 21:34:47 +0000 Subject: x86, Voyager: fix compile by lifting the degeneracy of phys_cpu_present_map This was changed to a physmap_t giving a clashing symbol redefinition, but actually using a physmap_t consumes rather a lot of space on x86, so stick with a private copy renamed with a voyager_ prefix and made static. Nothing outside of the Voyager code uses it, anyway. Signed-off-by: James Bottomley Signed-off-by: H. Peter Anvin --- arch/x86/mach-voyager/voyager_smp.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c index 7ffcdee..b9cc84a 100644 --- a/arch/x86/mach-voyager/voyager_smp.c +++ b/arch/x86/mach-voyager/voyager_smp.c @@ -65,7 +65,7 @@ static volatile unsigned long smp_invalidate_needed; /* Bitmask of CPUs present in the system - exported by i386_syms.c, used * by scheduler but indexed physically */ -cpumask_t phys_cpu_present_map = CPU_MASK_NONE; +static cpumask_t voyager_phys_cpu_present_map = CPU_MASK_NONE; /* The internal functions */ static void send_CPI(__u32 cpuset, __u8 cpi); @@ -366,19 +366,19 @@ void __init find_smp_config(void) /* set up everything for just this CPU, we can alter * this as we start the other CPUs later */ /* now get the CPU disposition from the extended CMOS */ - cpus_addr(phys_cpu_present_map)[0] = + cpus_addr(voyager_phys_cpu_present_map)[0] = voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK); - cpus_addr(phys_cpu_present_map)[0] |= + cpus_addr(voyager_phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 1) << 8; - cpus_addr(phys_cpu_present_map)[0] |= + cpus_addr(voyager_phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 2) << 16; - cpus_addr(phys_cpu_present_map)[0] |= + cpus_addr(voyager_phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 3) << 24; - init_cpu_possible(&phys_cpu_present_map); - printk("VOYAGER SMP: phys_cpu_present_map = 0x%lx\n", - cpus_addr(phys_cpu_present_map)[0]); + init_cpu_possible(&voyager_phys_cpu_present_map); + printk("VOYAGER SMP: voyager_phys_cpu_present_map = 0x%lx\n", + cpus_addr(voyager_phys_cpu_present_map)[0]); /* Here we set up the VIC to enable SMP */ /* enable the CPIs by writing the base vector to their register */ outb(VIC_DEFAULT_CPI_BASE, VIC_CPI_BASE_REGISTER); @@ -628,15 +628,15 @@ void __init smp_boot_cpus(void) /* now that the cat has probed the Voyager System Bus, sanity * check the cpu map */ if (((voyager_quad_processors | voyager_extended_vic_processors) - & cpus_addr(phys_cpu_present_map)[0]) != - cpus_addr(phys_cpu_present_map)[0]) { + & cpus_addr(voyager_phys_cpu_present_map)[0]) != + cpus_addr(voyager_phys_cpu_present_map)[0]) { /* should panic */ printk("\n\n***WARNING*** " "Sanity check of CPU present map FAILED\n"); } } else if (voyager_level == 4) voyager_extended_vic_processors = - cpus_addr(phys_cpu_present_map)[0]; + cpus_addr(voyager_phys_cpu_present_map)[0]; /* this sets up the idle task to run on the current cpu */ voyager_extended_cpus = 1; @@ -670,7 +670,7 @@ void __init smp_boot_cpus(void) /* loop over all the extended VIC CPUs and boot them. The * Quad CPUs must be bootstrapped by their extended VIC cpu */ for (i = 0; i < nr_cpu_ids; i++) { - if (i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map)) + if (i == boot_cpu_id || !cpu_isset(i, voyager_phys_cpu_present_map)) continue; do_boot_cpu(i); /* This udelay seems to be needed for the Quad boots -- cgit v1.1 From 10b614eaa847447c2c8646030728309d14bd2d05 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 24 Feb 2009 21:41:32 +0100 Subject: x86_32: summit_32, use BAD_APICID Use BAD_APICID instead of 0xFF constants in summit_cpu_mask_to_apicid. Also remove bogus comments about what we actually return. Signed-off-by: Jiri Slaby Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/summit_32.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c index cfe7b09..d02f438 100644 --- a/arch/x86/kernel/apic/summit_32.c +++ b/arch/x86/kernel/apic/summit_32.c @@ -303,12 +303,10 @@ static inline unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) int cpu; num_bits_set = cpus_weight(*cpumask); - /* Return id to all */ if (num_bits_set >= nr_cpu_ids) - return 0xFF; + return BAD_APICID; /* - * The cpus in the mask must all be on the apic cluster. If are not - * on the same apicid cluster return default value of target_cpus(): + * The cpus in the mask must all be on the apic cluster. */ cpu = first_cpu(*cpumask); apicid = summit_cpu_to_logical_apicid(cpu); @@ -318,9 +316,9 @@ static inline unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) int new_apicid = summit_cpu_to_logical_apicid(cpu); if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { - printk ("%s: Not a valid mask!\n", __func__); + printk("%s: Not a valid mask!\n", __func__); - return 0xFF; + return BAD_APICID; } apicid = apicid | new_apicid; cpus_found++; -- cgit v1.1 From b5f26d05565d070b7b352dba56b1f96e10021980 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 24 Feb 2009 21:41:33 +0100 Subject: x86_32: summit_32, de-inline functions The ones which go only into struct genapic are de-inlined by compiler anyway, so remove the inline specifier from them. Afterwards, remove summit_setup_portio_remap completely as it is unused. Remove inline also from summit_cpu_mask_to_apicid, since it's not worth it (it is used in struct genapic too). Signed-off-by: Jiri Slaby Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/summit_32.c | 47 +++++++++++++++++----------------------- 1 file changed, 20 insertions(+), 27 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c index d02f438..32838b5 100644 --- a/arch/x86/kernel/apic/summit_32.c +++ b/arch/x86/kernel/apic/summit_32.c @@ -48,7 +48,7 @@ #include #include -static inline unsigned summit_get_apic_id(unsigned long x) +static unsigned summit_get_apic_id(unsigned long x) { return (x >> 24) & 0xFF; } @@ -58,7 +58,7 @@ static inline void summit_send_IPI_mask(const cpumask_t *mask, int vector) default_send_IPI_mask_sequence_logical(mask, vector); } -static inline void summit_send_IPI_allbutself(int vector) +static void summit_send_IPI_allbutself(int vector) { cpumask_t mask = cpu_online_map; cpu_clear(smp_processor_id(), mask); @@ -67,7 +67,7 @@ static inline void summit_send_IPI_allbutself(int vector) summit_send_IPI_mask(&mask, vector); } -static inline void summit_send_IPI_all(int vector) +static void summit_send_IPI_all(int vector) { summit_send_IPI_mask(&cpu_online_map, vector); } @@ -82,8 +82,8 @@ extern void setup_summit(void); #define setup_summit() {} #endif -static inline int -summit_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid) +static int summit_mps_oem_check(struct mpc_table *mpc, char *oem, + char *productid) { if (!strncmp(oem, "IBM ENSW", 8) && (!strncmp(productid, "VIGIL SMP", 9) @@ -98,7 +98,7 @@ summit_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid) } /* Hook from generic ACPI tables.c */ -static inline int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +static int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id) { if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERVIGIL", 8) @@ -186,7 +186,7 @@ static inline int is_WPEG(struct rio_detail *rio){ #define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER) -static inline const cpumask_t *summit_target_cpus(void) +static const cpumask_t *summit_target_cpus(void) { /* CPU_MASK_ALL (0xff) has undefined behaviour with * dest_LowestPrio mode logical clustered apic interrupt routing @@ -195,19 +195,18 @@ static inline const cpumask_t *summit_target_cpus(void) return &cpumask_of_cpu(0); } -static inline unsigned long -summit_check_apicid_used(physid_mask_t bitmap, int apicid) +static unsigned long summit_check_apicid_used(physid_mask_t bitmap, int apicid) { return 0; } /* we don't use the phys_cpu_present_map to indicate apicid presence */ -static inline unsigned long summit_check_apicid_present(int bit) +static unsigned long summit_check_apicid_present(int bit) { return 1; } -static inline void summit_init_apic_ldr(void) +static void summit_init_apic_ldr(void) { unsigned long val, id; int count = 0; @@ -234,18 +233,18 @@ static inline void summit_init_apic_ldr(void) apic_write(APIC_LDR, val); } -static inline int summit_apic_id_registered(void) +static int summit_apic_id_registered(void) { return 1; } -static inline void summit_setup_apic_routing(void) +static void summit_setup_apic_routing(void) { printk("Enabling APIC mode: Summit. Using %d I/O APICs\n", nr_ioapics); } -static inline int summit_apicid_to_node(int logical_apicid) +static int summit_apicid_to_node(int logical_apicid) { #ifdef CONFIG_SMP return apicid_2_node[hard_smp_processor_id()]; @@ -266,7 +265,7 @@ static inline int summit_cpu_to_logical_apicid(int cpu) #endif } -static inline int summit_cpu_present_to_apicid(int mps_cpu) +static int summit_cpu_present_to_apicid(int mps_cpu) { if (mps_cpu < nr_cpu_ids) return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); @@ -274,28 +273,23 @@ static inline int summit_cpu_present_to_apicid(int mps_cpu) return BAD_APICID; } -static inline physid_mask_t -summit_ioapic_phys_id_map(physid_mask_t phys_id_map) +static physid_mask_t summit_ioapic_phys_id_map(physid_mask_t phys_id_map) { /* For clustered we don't have a good way to do this yet - hack */ return physids_promote(0x0F); } -static inline physid_mask_t summit_apicid_to_cpu_present(int apicid) +static physid_mask_t summit_apicid_to_cpu_present(int apicid) { return physid_mask_of_physid(0); } -static inline void summit_setup_portio_remap(void) -{ -} - -static inline int summit_check_phys_apicid_present(int boot_cpu_physical_apicid) +static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid) { return 1; } -static inline unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) +static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) { int cpus_found = 0; int num_bits_set; @@ -328,8 +322,7 @@ static inline unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) return apicid; } -static inline unsigned int -summit_cpu_mask_to_apicid_and(const struct cpumask *inmask, +static unsigned int summit_cpu_mask_to_apicid_and(const struct cpumask *inmask, const struct cpumask *andmask) { int apicid = summit_cpu_to_logical_apicid(0); @@ -354,7 +347,7 @@ summit_cpu_mask_to_apicid_and(const struct cpumask *inmask, * * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID. */ -static inline int summit_phys_pkg_id(int cpuid_apic, int index_msb) +static int summit_phys_pkg_id(int cpuid_apic, int index_msb) { return hard_smp_processor_id() >> index_msb; } -- cgit v1.1 From 46cb27f5169d37be38be8e5729b9a0100e989fa8 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Tue, 24 Feb 2009 13:12:43 -0800 Subject: x86: check range in reserve_early() Impact: cleanup one 32-bit system reports: BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001c000000 (usable) BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) DMI 2.0 present. last_pfn = 0x1c000 max_arch_pfn = 0x100000 kernel direct mapping tables up to 1c000000 @ 7000-c000 .. RAMDISK: 1bc69000 - 1bfef4fa .. 0MB HIGHMEM available. 448MB LOWMEM available. mapped low ram: 0 - 1c000000 low ram: 00000000 - 1c000000 bootmap 00002000 - 00005800 (9 early reservations) ==> bootmem [0000000000 - 001c000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000] #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000] #3 [0000400000 - 00009ed14c] TEXT DATA BSS ==> [0000400000 - 00009ed14c] #4 [001bc69000 - 001bfef4fa] RAMDISK ==> [001bc69000 - 001bfef4fa] #5 [00009ee000 - 00009f2000] INIT_PG_TABLE ==> [00009ee000 - 00009f2000] #6 [000009f400 - 0000100000] BIOS reserved ==> [000009f400 - 0000100000] #7 [0000007000 - 0000007000] PGTABLE #8 [0000002000 - 0000006000] BOOTMAP ==> [0000002000 - 0000006000] Notice the strange blank PGTABLE entry. The reason is init_pg_table is big enough, and zero range is called with init_memory_mapping/reserve_early(). So try to check the range in reserve_early() v2: fix the reversed compare Signed-off-by: Yinghai Lu Cc: nickpiggin@yahoo.com.au Cc: ink@jurassic.park.msu.ru Signed-off-by: Ingo Molnar --- arch/x86/kernel/e820.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e858268..508bec1 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -858,6 +858,9 @@ void __init reserve_early_overlap_ok(u64 start, u64 end, char *name) */ void __init reserve_early(u64 start, u64 end, char *name) { + if (start >= end) + return; + drop_overlaps_that_are_ok(start, end); __reserve_early(start, end, name, 0); } -- cgit v1.1 From 3255aa2eb636a508fc82a73fabbb8aaf2ff23c0f Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 25 Feb 2009 08:21:52 +0100 Subject: x86, mm: pass in 'total' to __copy_from_user_*nocache() Impact: cleanup, enable future change Add a 'total bytes copied' parameter to __copy_from_user_*nocache(), and update all the callsites. The parameter is not used yet - architecture code can use it to more intelligently decide whether the copy should be cached or non-temporal. Cc: Salman Qazi Cc: Nick Piggin Cc: Linus Torvalds Signed-off-by: Ingo Molnar --- arch/x86/include/asm/uaccess_32.h | 4 ++-- arch/x86/include/asm/uaccess_64.h | 5 ++--- 2 files changed, 4 insertions(+), 5 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h index 5e06259..a0ba613 100644 --- a/arch/x86/include/asm/uaccess_32.h +++ b/arch/x86/include/asm/uaccess_32.h @@ -157,7 +157,7 @@ __copy_from_user(void *to, const void __user *from, unsigned long n) } static __always_inline unsigned long __copy_from_user_nocache(void *to, - const void __user *from, unsigned long n) + const void __user *from, unsigned long n, unsigned long total) { might_fault(); if (__builtin_constant_p(n)) { @@ -180,7 +180,7 @@ static __always_inline unsigned long __copy_from_user_nocache(void *to, static __always_inline unsigned long __copy_from_user_inatomic_nocache(void *to, const void __user *from, - unsigned long n) + unsigned long n, unsigned long total) { return __copy_from_user_ll_nocache_nozero(to, from, n); } diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h index 987a2c1..a748253 100644 --- a/arch/x86/include/asm/uaccess_64.h +++ b/arch/x86/include/asm/uaccess_64.h @@ -189,7 +189,7 @@ extern long __copy_user_nocache(void *dst, const void __user *src, unsigned size, int zerorest); static inline int __copy_from_user_nocache(void *dst, const void __user *src, - unsigned size) + unsigned size, unsigned long total) { might_sleep(); /* @@ -205,8 +205,7 @@ static inline int __copy_from_user_nocache(void *dst, const void __user *src, } static inline int __copy_from_user_inatomic_nocache(void *dst, - const void __user *src, - unsigned size) + const void __user *src, unsigned size, unsigned total) { if (likely(size >= PAGE_SIZE)) return __copy_user_nocache(dst, src, size, 0); -- cgit v1.1 From 95108fa34a83ffd97e0af959e4b28d7c62008781 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 25 Feb 2009 08:22:20 +0100 Subject: x86: usercopy: check for total size when deciding non-temporal cutoff Impact: make more types of copies non-temporal This change makes the following simple fix: 30d697f: x86: fix performance regression in write() syscall A bit more sophisticated: we check the 'total' number of bytes written to decide whether to copy in a cached or a non-temporal way. This will for example cause the tail (modulo 4096 bytes) chunk of a large write() to be non-temporal too - not just the page-sized chunks. Cc: Salman Qazi Cc: Nick Piggin Cc: Linus Torvalds Signed-off-by: Ingo Molnar --- arch/x86/include/asm/uaccess_64.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h index a748253..dcaa040 100644 --- a/arch/x86/include/asm/uaccess_64.h +++ b/arch/x86/include/asm/uaccess_64.h @@ -198,7 +198,7 @@ static inline int __copy_from_user_nocache(void *dst, const void __user *src, * non-temporal stores here. Smaller writes get handled * via regular __copy_from_user(): */ - if (likely(size >= PAGE_SIZE)) + if (likely(total >= PAGE_SIZE)) return __copy_user_nocache(dst, src, size, 1); else return __copy_from_user(dst, src, size); @@ -207,7 +207,7 @@ static inline int __copy_from_user_nocache(void *dst, const void __user *src, static inline int __copy_from_user_inatomic_nocache(void *dst, const void __user *src, unsigned size, unsigned total) { - if (likely(size >= PAGE_SIZE)) + if (likely(total >= PAGE_SIZE)) return __copy_user_nocache(dst, src, size, 0); else return __copy_from_user_inatomic(dst, src, size); -- cgit v1.1 From 40823f737e5bd186a1156fb1c28f360260e1e084 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:26:18 +0100 Subject: x86: memtest: reuse test patterns when memtest parameter exceeds number of available patterns Impact: fix unexpected behaviour when pattern number is out of range Current implementation provides 4 patterns for memtest. The code doesn't check whether the memtest parameter value exceeds the maximum pattern number. Instead the memtest code pretends to test with non-existing patterns, e.g. when booting with memtest=10 I've observed the following ... early_memtest: pattern num 10 0000001000 - 0000006000 pattern 0 ... 0000001000 - 0000006000 pattern 1 ... 0000001000 - 0000006000 pattern 2 ... 0000001000 - 0000006000 pattern 3 ... 0000001000 - 0000006000 pattern 4 ... 0000001000 - 0000006000 pattern 5 ... 0000001000 - 0000006000 pattern 6 ... 0000001000 - 0000006000 pattern 7 ... 0000001000 - 0000006000 pattern 8 ... 0000001000 - 0000006000 pattern 9 ... But in fact Linux didn't test anything for patterns > 4 as the default case in memtest() is to leave the function. I suggest to use the memtest parameter as the number of tests to be performed and to re-iterate over all existing patterns. Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 9cab18b..00b8bdc 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -9,6 +9,8 @@ #include +#define _MAX_MEM_PATTERNS 4 + static void __init memtest(unsigned long start_phys, unsigned long size, unsigned pattern) { @@ -21,6 +23,8 @@ static void __init memtest(unsigned long start_phys, unsigned long size, unsigned long count; unsigned long incr; + pattern = pattern % _MAX_MEM_PATTERNS; + switch (pattern) { case 0: val = 0UL; @@ -110,8 +114,9 @@ void __init early_memtest(unsigned long start, unsigned long end) t_size = end - t_start; printk(KERN_CONT "\n %010llx - %010llx pattern %d", - (unsigned long long)t_start, - (unsigned long long)t_start + t_size, pattern); + (unsigned long long)t_start, + (unsigned long long)t_start + t_size, + pattern % _MAX_MEM_PATTERNS); memtest(t_start, t_size, pattern); -- cgit v1.1 From 6d74171bf7315257d276aa35400c5a8d6a993f19 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:27:27 +0100 Subject: x86: memtest: introduce array to select memtest patterns Impact: code cleanup Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 65 ++++++++++++++++++--------------------------------- 1 file changed, 23 insertions(+), 42 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 00b8bdc..827f940 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -9,48 +9,25 @@ #include -#define _MAX_MEM_PATTERNS 4 +static u64 patterns[] __initdata = { + 0, + 0xffffffffffffffffULL, + 0x5555555555555555ULL, + 0xaaaaaaaaaaaaaaaaULL, +}; static void __init memtest(unsigned long start_phys, unsigned long size, - unsigned pattern) + u64 pattern) { unsigned long i; - unsigned long *start; + u64 *start; unsigned long start_bad; unsigned long last_bad; - unsigned long val; unsigned long start_phys_aligned; unsigned long count; unsigned long incr; - pattern = pattern % _MAX_MEM_PATTERNS; - - switch (pattern) { - case 0: - val = 0UL; - break; - case 1: - val = -1UL; - break; - case 2: -#ifdef CONFIG_X86_64 - val = 0x5555555555555555UL; -#else - val = 0x55555555UL; -#endif - break; - case 3: -#ifdef CONFIG_X86_64 - val = 0xaaaaaaaaaaaaaaaaUL; -#else - val = 0xaaaaaaaaUL; -#endif - break; - default: - return; - } - - incr = sizeof(unsigned long); + incr = sizeof(pattern); start_phys_aligned = ALIGN(start_phys, incr); count = (size - (start_phys_aligned - start_phys))/incr; start = __va(start_phys_aligned); @@ -58,15 +35,16 @@ static void __init memtest(unsigned long start_phys, unsigned long size, last_bad = 0; for (i = 0; i < count; i++) - start[i] = val; + start[i] = pattern; for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { - if (*start != val) { + if (*start != pattern) { if (start_phys_aligned == last_bad + incr) { last_bad += incr; } else { if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %010lx - %010lx reserved", - val, start_bad, last_bad + incr); + printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", + (unsigned long long) pattern, + start_bad, last_bad + incr); reserve_early(start_bad, last_bad + incr, "BAD RAM"); } start_bad = last_bad = start_phys_aligned; @@ -74,8 +52,9 @@ static void __init memtest(unsigned long start_phys, unsigned long size, } } if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %010lx - %010lx reserved", - val, start_bad, last_bad + incr); + printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", + (unsigned long long) pattern, start_bad, + last_bad + incr); reserve_early(start_bad, last_bad + incr, "BAD RAM"); } } @@ -95,13 +74,16 @@ early_param("memtest", parse_memtest); void __init early_memtest(unsigned long start, unsigned long end) { u64 t_start, t_size; - unsigned pattern; + unsigned int i; + u64 pattern; if (!memtest_pattern) return; printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); - for (pattern = 0; pattern < memtest_pattern; pattern++) { + for (i = 0; i < memtest_pattern; i++) { + unsigned int idx = i % ARRAY_SIZE(patterns); + pattern = patterns[idx]; t_start = start; t_size = 0; while (t_start < end) { @@ -115,8 +97,7 @@ void __init early_memtest(unsigned long start, unsigned long end) printk(KERN_CONT "\n %010llx - %010llx pattern %d", (unsigned long long)t_start, - (unsigned long long)t_start + t_size, - pattern % _MAX_MEM_PATTERNS); + (unsigned long long)t_start + t_size, idx); memtest(t_start, t_size, pattern); -- cgit v1.1 From 7dad169e57eda1f0aa6dc5ac43a898b4b0ced2c7 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:28:07 +0100 Subject: x86: memtest: cleanup memtest function Impact: code cleanup Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 37 +++++++++++++++++++------------------ 1 file changed, 19 insertions(+), 18 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 827f940..01a72d6 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -16,6 +16,15 @@ static u64 patterns[] __initdata = { 0xaaaaaaaaaaaaaaaaULL, }; +static void __init reserve_bad_mem(u64 pattern, unsigned long start_bad, + unsigned long end_bad) +{ + printk(KERN_CONT "\n %016llx bad mem addr " + "%010lx - %010lx reserved", + (unsigned long long) pattern, start_bad, end_bad); + reserve_early(start_bad, end_bad, "BAD RAM"); +} + static void __init memtest(unsigned long start_phys, unsigned long size, u64 pattern) { @@ -37,26 +46,18 @@ static void __init memtest(unsigned long start_phys, unsigned long size, for (i = 0; i < count; i++) start[i] = pattern; for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { - if (*start != pattern) { - if (start_phys_aligned == last_bad + incr) { - last_bad += incr; - } else { - if (start_bad) { - printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", - (unsigned long long) pattern, - start_bad, last_bad + incr); - reserve_early(start_bad, last_bad + incr, "BAD RAM"); - } - start_bad = last_bad = start_phys_aligned; - } + if (*start == pattern) + continue; + if (start_phys_aligned == last_bad + incr) { + last_bad += incr; + continue; } + if (start_bad) + reserve_bad_mem(pattern, start_bad, last_bad + incr); + start_bad = last_bad = start_phys_aligned; } - if (start_bad) { - printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", - (unsigned long long) pattern, start_bad, - last_bad + incr); - reserve_early(start_bad, last_bad + incr, "BAD RAM"); - } + if (start_bad) + reserve_bad_mem(pattern, start_bad, last_bad + incr); } /* default is disabled */ -- cgit v1.1 From 570c9e69aaa84689fb8ed2a3a4af39ca54ba7a47 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:28:58 +0100 Subject: x86: memtest: adapt log messages - print test pattern instead of pattern number, - show pattern as stored in memory, - use proper priority flags, - consistent use of u64 throughout the code Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 01a72d6..3232397 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -16,25 +16,22 @@ static u64 patterns[] __initdata = { 0xaaaaaaaaaaaaaaaaULL, }; -static void __init reserve_bad_mem(u64 pattern, unsigned long start_bad, - unsigned long end_bad) +static void __init reserve_bad_mem(u64 pattern, u64 start_bad, u64 end_bad) { - printk(KERN_CONT "\n %016llx bad mem addr " - "%010lx - %010lx reserved", - (unsigned long long) pattern, start_bad, end_bad); + printk(KERN_INFO " %016llx bad mem addr %010llx - %010llx reserved\n", + (unsigned long long) pattern, + (unsigned long long) start_bad, + (unsigned long long) end_bad); reserve_early(start_bad, end_bad, "BAD RAM"); } -static void __init memtest(unsigned long start_phys, unsigned long size, - u64 pattern) +static void __init memtest(u64 pattern, u64 start_phys, u64 size) { - unsigned long i; + u64 i, count; u64 *start; - unsigned long start_bad; - unsigned long last_bad; - unsigned long start_phys_aligned; - unsigned long count; - unsigned long incr; + u64 start_bad, last_bad; + u64 start_phys_aligned; + size_t incr; incr = sizeof(pattern); start_phys_aligned = ALIGN(start_phys, incr); @@ -81,7 +78,7 @@ void __init early_memtest(unsigned long start, unsigned long end) if (!memtest_pattern) return; - printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); + printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern); for (i = 0; i < memtest_pattern; i++) { unsigned int idx = i % ARRAY_SIZE(patterns); pattern = patterns[idx]; @@ -96,14 +93,13 @@ void __init early_memtest(unsigned long start, unsigned long end) if (t_start + t_size > end) t_size = end - t_start; - printk(KERN_CONT "\n %010llx - %010llx pattern %d", - (unsigned long long)t_start, - (unsigned long long)t_start + t_size, idx); - - memtest(t_start, t_size, pattern); + printk(KERN_INFO " %010llx - %010llx pattern %016llx\n", + (unsigned long long) t_start, + (unsigned long long) t_start + t_size, + (unsigned long long) cpu_to_be64(pattern)); + memtest(pattern, t_start, t_size); t_start += t_size; } } - printk(KERN_CONT "\n"); } -- cgit v1.1 From bfb4dc0da45f8fddc76eba7e62919420c7d6dae2 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:30:04 +0100 Subject: x86: memtest: wipe out test pattern from memory Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 56 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 33 insertions(+), 23 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 3232397..9c52ef1 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -57,6 +57,29 @@ static void __init memtest(u64 pattern, u64 start_phys, u64 size) reserve_bad_mem(pattern, start_bad, last_bad + incr); } +static void __init do_one_pass(u64 pattern, u64 start, u64 end) +{ + u64 size = 0; + + while (start < end) { + start = find_e820_area_size(start, &size, 1); + + /* done ? */ + if (start >= end) + break; + if (start + size > end) + size = end - start; + + printk(KERN_INFO " %010llx - %010llx pattern %016llx\n", + (unsigned long long) start, + (unsigned long long) start + size, + (unsigned long long) cpu_to_be64(pattern)); + memtest(pattern, start, size); + + start += size; + } +} + /* default is disabled */ static int memtest_pattern __initdata; @@ -71,35 +94,22 @@ early_param("memtest", parse_memtest); void __init early_memtest(unsigned long start, unsigned long end) { - u64 t_start, t_size; unsigned int i; - u64 pattern; + unsigned int idx = 0; if (!memtest_pattern) return; printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern); for (i = 0; i < memtest_pattern; i++) { - unsigned int idx = i % ARRAY_SIZE(patterns); - pattern = patterns[idx]; - t_start = start; - t_size = 0; - while (t_start < end) { - t_start = find_e820_area_size(t_start, &t_size, 1); - - /* done ? */ - if (t_start >= end) - break; - if (t_start + t_size > end) - t_size = end - t_start; - - printk(KERN_INFO " %010llx - %010llx pattern %016llx\n", - (unsigned long long) t_start, - (unsigned long long) t_start + t_size, - (unsigned long long) cpu_to_be64(pattern)); - memtest(pattern, t_start, t_size); - - t_start += t_size; - } + idx = i % ARRAY_SIZE(patterns); + do_one_pass(patterns[idx], start, end); + } + + if (idx > 0) { + printk(KERN_INFO "early_memtest: wipe out " + "test pattern from memory\n"); + /* additional test with pattern 0 will do this */ + do_one_pass(0, start, end); } } -- cgit v1.1 From 63823126c221dd721ce7351b596b3b73aa943613 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:31:49 +0100 Subject: x86: memtest: add additional (regular) test patterns Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 9c52ef1..0bcd788 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -14,6 +14,19 @@ static u64 patterns[] __initdata = { 0xffffffffffffffffULL, 0x5555555555555555ULL, 0xaaaaaaaaaaaaaaaaULL, + 0x1111111111111111ULL, + 0x2222222222222222ULL, + 0x4444444444444444ULL, + 0x8888888888888888ULL, + 0x3333333333333333ULL, + 0x6666666666666666ULL, + 0x9999999999999999ULL, + 0xccccccccccccccccULL, + 0x7777777777777777ULL, + 0xbbbbbbbbbbbbbbbbULL, + 0xddddddddddddddddULL, + 0xeeeeeeeeeeeeeeeeULL, + 0x7a6c7258554e494cULL, /* yeah ;-) */ }; static void __init reserve_bad_mem(u64 pattern, u64 start_bad, u64 end_bad) -- cgit v1.1 From 7880f7464546842ee14179bef16a6e14381ea638 Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Tue, 24 Feb 2009 17:35:13 -0800 Subject: gpu/drm, x86, PAT: routine to keep identity map in sync Add a function to check and keep identity maps in sync, when changing any memory type. One of the follow on patches will also use this routine. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Suresh Siddha Cc: Dave Airlie Cc: Jesse Barnes Cc: Eric Anholt Cc: Keith Packard Signed-off-by: Ingo Molnar --- arch/x86/include/asm/pat.h | 3 +++ arch/x86/mm/pat.c | 46 +++++++++++++++++++++++++++++----------------- 2 files changed, 32 insertions(+), 17 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index b8493b3..abb3c29 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -19,4 +19,7 @@ extern int free_memtype(u64 start, u64 end); extern void pat_disable(char *reason); +extern int kernel_map_sync_memtype(u64 base, unsigned long size, + unsigned long flag); + #endif /* _ASM_X86_PAT_H */ diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index aebbf67..399383c 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -625,6 +625,33 @@ void unmap_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot) } /* + * Change the memory type for the physial address range in kernel identity + * mapping space if that range is a part of identity map. + */ +int kernel_map_sync_memtype(u64 base, unsigned long size, unsigned long flags) +{ + unsigned long id_sz; + + if (!pat_enabled || base >= __pa(high_memory)) + return 0; + + id_sz = (__pa(high_memory) < base + size) ? + __pa(high_memory) - base : + size; + + if (ioremap_change_attr((unsigned long)__va(base), id_sz, flags) < 0) { + printk(KERN_INFO + "%s:%d ioremap_change_attr failed %s " + "for %Lx-%Lx\n", + current->comm, current->pid, + cattr_name(flags), + base, (unsigned long long)(base + size)); + return -EINVAL; + } + return 0; +} + +/* * Internal interface to reserve a range of physical memory with prot. * Reserved non RAM regions only and after successful reserve_memtype, * this func also keeps identity mapping (if any) in sync with this new prot. @@ -633,7 +660,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, int strict_prot) { int is_ram = 0; - int id_sz, ret; + int ret; unsigned long flags; unsigned long want_flags = (pgprot_val(*vma_prot) & _PAGE_CACHE_MASK); @@ -670,23 +697,8 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, flags); } - /* Need to keep identity mapping in sync */ - if (paddr >= __pa(high_memory)) - return 0; - - id_sz = (__pa(high_memory) < paddr + size) ? - __pa(high_memory) - paddr : - size; - - if (ioremap_change_attr((unsigned long)__va(paddr), id_sz, flags) < 0) { + if (kernel_map_sync_memtype(paddr, size, flags) < 0) { free_memtype(paddr, paddr + size); - printk(KERN_ERR - "%s:%d reserve_pfn_range ioremap_change_attr failed %s " - "for %Lx-%Lx\n", - current->comm, current->pid, - cattr_name(flags), - (unsigned long long)paddr, - (unsigned long long)(paddr + size)); return -EINVAL; } return 0; -- cgit v1.1 From 4ab0d47d0ab311eb181532c1ecb6d02905685071 Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Tue, 24 Feb 2009 17:35:12 -0800 Subject: gpu/drm, x86, PAT: io_mapping_create_wc and resource_size_t io_mapping_create_wc should take a resource_size_t parameter in place of unsigned long. With unsigned long, there will be no way to map greater than 4GB address in i386/32 bit. On x86, greater than 4GB addresses cannot be mapped on i386 without PAE. Return error for such a case. Patch also adds a structure for io_mapping, that saves the base, size and type on HAVE_ATOMIC_IOMAP archs, that can be used to verify the offset on io_mapping_map calls. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Suresh Siddha Cc: Dave Airlie Cc: Jesse Barnes Cc: Eric Anholt Cc: Keith Packard Signed-off-by: Ingo Molnar --- arch/x86/include/asm/iomap.h | 3 +++ arch/x86/mm/iomap_32.c | 18 ++++++++++++++++++ 2 files changed, 21 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h index c1f0628..86af260 100644 --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -23,6 +23,9 @@ #include #include +int +is_io_mapping_possible(resource_size_t base, unsigned long size); + void * iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index ca53224..6c2b1af 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -20,6 +20,24 @@ #include #include +#ifdef CONFIG_X86_PAE +int +is_io_mapping_possible(resource_size_t base, unsigned long size) +{ + return 1; +} +#else +int +is_io_mapping_possible(resource_size_t base, unsigned long size) +{ + /* There is no way to map greater than 1 << 32 address without PAE */ + if (base + size > 0x100000000ULL) + return 0; + + return 1; +} +#endif + /* Map 'pfn' using fixed map 'type' and protections 'prot' */ void * -- cgit v1.1 From 17581ad812a9abb0182260374ef2e52d4a808a64 Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Tue, 24 Feb 2009 17:35:14 -0800 Subject: gpu/drm, x86, PAT: PAT support for io_mapping_* Make io_mapping_create_wc and io_mapping_free go through PAT to make sure that there are no memory type aliases. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Suresh Siddha Cc: Dave Airlie Cc: Jesse Barnes Cc: Eric Anholt Cc: Keith Packard Signed-off-by: Ingo Molnar --- arch/x86/include/asm/iomap.h | 5 ++++- arch/x86/mm/iomap_32.c | 42 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 44 insertions(+), 3 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h index 86af260..bd46495 100644 --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -24,7 +24,10 @@ #include int -is_io_mapping_possible(resource_size_t base, unsigned long size); +reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot); + +void +free_io_memtype(u64 base, unsigned long size); void * iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 6c2b1af..94596f7 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -21,13 +21,13 @@ #include #ifdef CONFIG_X86_PAE -int +static int is_io_mapping_possible(resource_size_t base, unsigned long size) { return 1; } #else -int +static int is_io_mapping_possible(resource_size_t base, unsigned long size) { /* There is no way to map greater than 1 << 32 address without PAE */ @@ -38,6 +38,44 @@ is_io_mapping_possible(resource_size_t base, unsigned long size) } #endif +int +reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot) +{ + unsigned long ret_flag; + + if (!is_io_mapping_possible(base, size)) + goto out_err; + + if (!pat_enabled) { + *prot = pgprot_noncached(PAGE_KERNEL); + return 0; + } + + if (reserve_memtype(base, base + size, _PAGE_CACHE_WC, &ret_flag)) + goto out_err; + + if (ret_flag == _PAGE_CACHE_WB) + goto out_free; + + if (kernel_map_sync_memtype(base, size, ret_flag)) + goto out_free; + + *prot = __pgprot(__PAGE_KERNEL | ret_flag); + return 0; + +out_free: + free_memtype(base, base + size); +out_err: + return -EINVAL; +} + +void +free_io_memtype(u64 base, unsigned long size) +{ + if (pat_enabled) + free_memtype(base, base + size); +} + /* Map 'pfn' using fixed map 'type' and protections 'prot' */ void * -- cgit v1.1 From 34754b69a6f87aa6aa2860525a82f12532f83afd Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 25 Feb 2009 16:04:03 +0100 Subject: x86: make vmap yell louder when it is used under irqs_disabled() Signed-off-by: Ingo Molnar --- arch/x86/kernel/alternative.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index a84ac7b..6907b8e 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -498,12 +498,12 @@ void *text_poke_early(void *addr, const void *opcode, size_t len) */ void *__kprobes text_poke(void *addr, const void *opcode, size_t len) { - unsigned long flags; char *vaddr; int nr_pages = 2; struct page *pages[2]; int i; + might_sleep(); if (!core_kernel_text((unsigned long)addr)) { pages[0] = vmalloc_to_page(addr); pages[1] = vmalloc_to_page(addr + PAGE_SIZE); @@ -517,9 +517,9 @@ void *__kprobes text_poke(void *addr, const void *opcode, size_t len) nr_pages = 1; vaddr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL); BUG_ON(!vaddr); - local_irq_save(flags); + local_irq_disable(); memcpy(&vaddr[(unsigned long)addr & ~PAGE_MASK], opcode, len); - local_irq_restore(flags); + local_irq_enable(); vunmap(vaddr); sync_core(); /* Could also do a CLFLUSH here to speed up CPU recovery; but -- cgit v1.1 From 55d8085671863fe4ee6a17b7814bd38180a44e1d Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Wed, 25 Feb 2009 09:42:25 -0800 Subject: xen: disable interrupts early, as start_kernel expects This avoids a lockdep warning from: if (DEBUG_LOCKS_WARN_ON(unlikely(!early_boot_irqs_enabled))) return; in trace_hardirqs_on_caller(); Signed-off-by: Jeremy Fitzhardinge Cc: Mark McLoughlin Cc: Xen-devel Signed-off-by: Ingo Molnar --- arch/x86/xen/enlighten.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index bea2152..b58e963 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1672,6 +1672,9 @@ asmlinkage void __init xen_start_kernel(void) possible map and a non-dummy shared_info. */ per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0]; + local_irq_disable(); + early_boot_irqs_off(); + xen_raw_console_write("mapping kernel into physical memory\n"); pgd = xen_setup_kernel_pagetable(pgd, xen_start_info->nr_pages); -- cgit v1.1 From 13093cb0e59053bf97910de3a24f07cdff71c62c Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 26 Feb 2009 03:16:47 +0100 Subject: gpu/drm, x86, PAT: PAT support for io_mapping_*, export symbols for modules Impact: build fix ERROR: "reserve_io_memtype_wc" [drivers/gpu/drm/i915/i915.ko] undefined! ERROR: "free_io_memtype" [drivers/gpu/drm/i915/i915.ko] undefined! Signed-off-by: Ingo Molnar --- arch/x86/mm/iomap_32.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 94596f7..d5e2842 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -68,6 +68,7 @@ out_free: out_err: return -EINVAL; } +EXPORT_SYMBOL_GPL(reserve_io_memtype_wc); void free_io_memtype(u64 base, unsigned long size) @@ -75,6 +76,7 @@ free_io_memtype(u64 base, unsigned long size) if (pat_enabled) free_memtype(base, base + size); } +EXPORT_SYMBOL_GPL(free_io_memtype); /* Map 'pfn' using fixed map 'type' and protections 'prot' */ -- cgit v1.1 From f6be37fdc62d0c0214bc49815d1180ebfbd716e2 Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Thu, 26 Feb 2009 12:57:56 -0500 Subject: x86: enable DMAR by default Now that the obvious bugs have been worked out, specifically the iwlagn issue, and the write buffer errata, DMAR should be safe to turn back on by default. (We've had it on since those patches were first written a few weeks ago, without any noticeable bug reports (most have been due to the dma-api debug patchset.)) Signed-off-by: Kyle McMartin Acked-by: David Woodhouse Signed-off-by: Ingo Molnar --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86') diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9c39095..bc2fbad 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1803,7 +1803,7 @@ config DMAR remapping devices. config DMAR_DEFAULT_ON - def_bool n + def_bool y prompt "Enable DMA Remapping Devices by default" depends on DMAR help -- cgit v1.1 From 92b9af9e4f144535c65aee673cfad309f25fa465 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sat, 28 Feb 2009 14:09:27 +0100 Subject: x86: i915 needs pgprot_writecombine() and is_io_mapping_possible() Impact: build fix Theodore Ts reported that the i915 driver needs these symbols: ERROR: "pgprot_writecombine" [drivers/gpu/drm/i915/i915.ko] undefined! ERROR: "is_io_mapping_possible" [drivers/gpu/drm/i915/i915.ko] undefined! Reported-by: Theodore Ts'o wrote: Signed-off-by: Ingo Molnar --- arch/x86/mm/iomap_32.c | 15 ++++----------- arch/x86/mm/pat.c | 2 ++ 2 files changed, 6 insertions(+), 11 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 6c2b1af..04102d4 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -20,23 +20,16 @@ #include #include -#ifdef CONFIG_X86_PAE -int -is_io_mapping_possible(resource_size_t base, unsigned long size) -{ - return 1; -} -#else -int -is_io_mapping_possible(resource_size_t base, unsigned long size) +int is_io_mapping_possible(resource_size_t base, unsigned long size) { +#ifndef CONFIG_X86_PAE /* There is no way to map greater than 1 << 32 address without PAE */ if (base + size > 0x100000000ULL) return 0; - +#endif return 1; } -#endif +EXPORT_SYMBOL_GPL(is_io_mapping_possible); /* Map 'pfn' using fixed map 'type' and protections 'prot' */ diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index aebbf67..e0ab173 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -868,6 +869,7 @@ pgprot_t pgprot_writecombine(pgprot_t prot) else return pgprot_noncached(prot); } +EXPORT_SYMBOL_GPL(pgprot_writecombine); #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_X86_PAT) -- cgit v1.1 From f5c1aa1537be39d8b9bb5279b5881d81898fd3cd Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 1 Mar 2009 12:32:08 +0100 Subject: Revert "gpu/drm, x86, PAT: PAT support for io_mapping_*" This reverts commit 17581ad812a9abb0182260374ef2e52d4a808a64. Sitsofe Wheeler reported that /dev/dri/card0 is MIA on his EeePC 900 and bisected it to this commit. Graphics card is an i915 in an EeePC 900: 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 04) ( Most likely the ioremap() of the driver failed and hence the card did not initialize. ) Reported-by: Sitsofe Wheeler Bisected-by: Sitsofe Wheeler Cc: Venkatesh Pallipadi Cc: Suresh Siddha Signed-off-by: Ingo Molnar --- arch/x86/include/asm/iomap.h | 5 +---- arch/x86/mm/iomap_32.c | 44 ++------------------------------------------ 2 files changed, 3 insertions(+), 46 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h index bd46495..86af260 100644 --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -24,10 +24,7 @@ #include int -reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot); - -void -free_io_memtype(u64 base, unsigned long size); +is_io_mapping_possible(resource_size_t base, unsigned long size); void * iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index d5e2842..6c2b1af 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -21,13 +21,13 @@ #include #ifdef CONFIG_X86_PAE -static int +int is_io_mapping_possible(resource_size_t base, unsigned long size) { return 1; } #else -static int +int is_io_mapping_possible(resource_size_t base, unsigned long size) { /* There is no way to map greater than 1 << 32 address without PAE */ @@ -38,46 +38,6 @@ is_io_mapping_possible(resource_size_t base, unsigned long size) } #endif -int -reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot) -{ - unsigned long ret_flag; - - if (!is_io_mapping_possible(base, size)) - goto out_err; - - if (!pat_enabled) { - *prot = pgprot_noncached(PAGE_KERNEL); - return 0; - } - - if (reserve_memtype(base, base + size, _PAGE_CACHE_WC, &ret_flag)) - goto out_err; - - if (ret_flag == _PAGE_CACHE_WB) - goto out_free; - - if (kernel_map_sync_memtype(base, size, ret_flag)) - goto out_free; - - *prot = __pgprot(__PAGE_KERNEL | ret_flag); - return 0; - -out_free: - free_memtype(base, base + size); -out_err: - return -EINVAL; -} -EXPORT_SYMBOL_GPL(reserve_io_memtype_wc); - -void -free_io_memtype(u64 base, unsigned long size) -{ - if (pat_enabled) - free_memtype(base, base + size); -} -EXPORT_SYMBOL_GPL(free_io_memtype); - /* Map 'pfn' using fixed map 'type' and protections 'prot' */ void * -- cgit v1.1