diff options
author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-10-26 21:21:51 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 23:52:08 (GMT) |
commit | 3e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73 (patch) | |
tree | 2ce507f7ec7275563653e52f18606aba4f99b7f1 /arch | |
parent | 61ecdb801ef2cd28e32442383106d7837d76deac (diff) | |
download | linux-fsl-qoriq-3e4d3af501cccdc8a8cca41bdbe57d54ad7e7e73.tar.xz |
mm: stack based kmap_atomic()
Keep the current interface but ignore the KM_type and use a stack based
approach.
The advantage is that we get rid of crappy code like:
#define __KM_PTE \
(in_nmi() ? KM_NMI_PTE : \
in_irq() ? KM_IRQ_PTE : \
KM_PTE0)
and in general can stop worrying about what context we're in and what kmap
slots might be appropriate for that.
The downside is that FRV kmap_atomic() gets more expensive.
For now we use a CPP trick suggested by Andrew:
#define kmap_atomic(page, args...) __kmap_atomic(page)
to avoid having to touch all kmap_atomic() users in a single patch.
[ not compiled on:
- mn10300: the arch doesn't actually build with highmem to begin with ]
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c]
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/include/asm/highmem.h | 6 | ||||
-rw-r--r-- | arch/arm/mm/highmem.c | 23 | ||||
-rw-r--r-- | arch/frv/include/asm/highmem.h | 25 | ||||
-rw-r--r-- | arch/frv/mb93090-mb00/pci-dma.c | 4 | ||||
-rw-r--r-- | arch/frv/mm/cache-page.c | 8 | ||||
-rw-r--r-- | arch/frv/mm/highmem.c | 50 | ||||
-rw-r--r-- | arch/mips/include/asm/highmem.h | 18 | ||||
-rw-r--r-- | arch/mips/mm/highmem.c | 50 | ||||
-rw-r--r-- | arch/mn10300/include/asm/highmem.h | 42 | ||||
-rw-r--r-- | arch/powerpc/include/asm/highmem.h | 9 | ||||
-rw-r--r-- | arch/powerpc/mm/highmem.c | 35 | ||||
-rw-r--r-- | arch/sparc/include/asm/highmem.h | 4 | ||||
-rw-r--r-- | arch/sparc/mm/highmem.c | 48 | ||||
-rw-r--r-- | arch/tile/include/asm/highmem.h | 10 | ||||
-rw-r--r-- | arch/tile/mm/highmem.c | 85 | ||||
-rw-r--r-- | arch/x86/include/asm/highmem.h | 11 | ||||
-rw-r--r-- | arch/x86/include/asm/iomap.h | 4 | ||||
-rw-r--r-- | arch/x86/kernel/crash_dump_32.c | 2 | ||||
-rw-r--r-- | arch/x86/mm/highmem_32.c | 75 | ||||
-rw-r--r-- | arch/x86/mm/iomap_32.c | 42 |
20 files changed, 294 insertions, 257 deletions
diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h index 5aff581..1fc684e 100644 --- a/arch/arm/include/asm/highmem.h +++ b/arch/arm/include/asm/highmem.h @@ -35,9 +35,9 @@ extern void kunmap_high_l1_vipt(struct page *page, pte_t saved_pte); #ifdef CONFIG_HIGHMEM extern void *kmap(struct page *page); extern void kunmap(struct page *page); -extern void *kmap_atomic(struct page *page, enum km_type type); -extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); -extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); +extern void *__kmap_atomic(struct page *page); +extern void __kunmap_atomic(void *kvaddr); +extern void *kmap_atomic_pfn(unsigned long pfn); extern struct page *kmap_atomic_to_page(const void *ptr); #endif diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c index 1fbdb55..c00f119 100644 --- a/arch/arm/mm/highmem.c +++ b/arch/arm/mm/highmem.c @@ -36,18 +36,17 @@ void kunmap(struct page *page) } EXPORT_SYMBOL(kunmap); -void *kmap_atomic(struct page *page, enum km_type type) +void *__kmap_atomic(struct page *page) { unsigned int idx; unsigned long vaddr; void *kmap; + int type; pagefault_disable(); if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic(type); - #ifdef CONFIG_DEBUG_HIGHMEM /* * There is no cache coherency issue when non VIVT, so force the @@ -61,6 +60,8 @@ void *kmap_atomic(struct page *page, enum km_type type) if (kmap) return kmap; + type = kmap_atomic_idx_push(); + idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #ifdef CONFIG_DEBUG_HIGHMEM @@ -80,14 +81,17 @@ void *kmap_atomic(struct page *page, enum km_type type) return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic); +EXPORT_SYMBOL(__kmap_atomic); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - unsigned int idx = type + KM_TYPE_NR * smp_processor_id(); + int idx, type; if (kvaddr >= (void *)FIXADDR_START) { + type = kmap_atomic_idx_pop(); + idx = type + KM_TYPE_NR * smp_processor_id(); + if (cache_is_vivt()) __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); #ifdef CONFIG_DEBUG_HIGHMEM @@ -103,15 +107,16 @@ void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) } pagefault_enable(); } -EXPORT_SYMBOL(kunmap_atomic_notypecheck); +EXPORT_SYMBOL(__kunmap_atomic); -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) +void *kmap_atomic_pfn(unsigned long pfn) { - unsigned int idx; unsigned long vaddr; + int idx, type; pagefault_disable(); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #ifdef CONFIG_DEBUG_HIGHMEM diff --git a/arch/frv/include/asm/highmem.h b/arch/frv/include/asm/highmem.h index cb4c317..a8d6565 100644 --- a/arch/frv/include/asm/highmem.h +++ b/arch/frv/include/asm/highmem.h @@ -112,12 +112,11 @@ extern struct page *kmap_atomic_to_page(void *ptr); (void *) damlr; \ }) -static inline void *kmap_atomic(struct page *page, enum km_type type) +static inline void *kmap_atomic_primary(struct page *page, enum km_type type) { unsigned long paddr; pagefault_disable(); - debug_kmap_atomic(type); paddr = page_to_phys(page); switch (type) { @@ -125,14 +124,6 @@ static inline void *kmap_atomic(struct page *page, enum km_type type) case 1: return __kmap_atomic_primary(1, paddr, 3); case 2: return __kmap_atomic_primary(2, paddr, 4); case 3: return __kmap_atomic_primary(3, paddr, 5); - case 4: return __kmap_atomic_primary(4, paddr, 6); - case 5: return __kmap_atomic_primary(5, paddr, 7); - case 6: return __kmap_atomic_primary(6, paddr, 8); - case 7: return __kmap_atomic_primary(7, paddr, 9); - case 8: return __kmap_atomic_primary(8, paddr, 10); - - case 9 ... 9 + NR_TLB_LINES - 1: - return __kmap_atomic_secondary(type - 9, paddr); default: BUG(); @@ -152,22 +143,13 @@ do { \ asm volatile("tlbpr %0,gr0,#4,#1" : : "r"(vaddr) : "memory"); \ } while(0) -static inline void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +static inline void kunmap_atomic_primary(void *kvaddr, enum km_type type) { switch (type) { case 0: __kunmap_atomic_primary(0, 2); break; case 1: __kunmap_atomic_primary(1, 3); break; case 2: __kunmap_atomic_primary(2, 4); break; case 3: __kunmap_atomic_primary(3, 5); break; - case 4: __kunmap_atomic_primary(4, 6); break; - case 5: __kunmap_atomic_primary(5, 7); break; - case 6: __kunmap_atomic_primary(6, 8); break; - case 7: __kunmap_atomic_primary(7, 9); break; - case 8: __kunmap_atomic_primary(8, 10); break; - - case 9 ... 9 + NR_TLB_LINES - 1: - __kunmap_atomic_secondary(type - 9, kvaddr); - break; default: BUG(); @@ -175,6 +157,9 @@ static inline void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) pagefault_enable(); } +void *__kmap_atomic(struct page *page); +void __kunmap_atomic(void *kvaddr); + #endif /* !__ASSEMBLY__ */ #endif /* __KERNEL__ */ diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c index 85d110b..41098a3 100644 --- a/arch/frv/mb93090-mb00/pci-dma.c +++ b/arch/frv/mb93090-mb00/pci-dma.c @@ -61,14 +61,14 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, dampr2 = __get_DAMPR(2); for (i = 0; i < nents; i++) { - vaddr = kmap_atomic(sg_page(&sg[i]), __KM_CACHE); + vaddr = kmap_atomic_primary(sg_page(&sg[i]), __KM_CACHE); frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); } - kunmap_atomic(vaddr, __KM_CACHE); + kunmap_atomic_primary(vaddr, __KM_CACHE); if (dampr2) { __set_DAMPR(2, dampr2); __set_IAMPR(2, dampr2); diff --git a/arch/frv/mm/cache-page.c b/arch/frv/mm/cache-page.c index 0261cbe..b24ade2 100644 --- a/arch/frv/mm/cache-page.c +++ b/arch/frv/mm/cache-page.c @@ -26,11 +26,11 @@ void flush_dcache_page(struct page *page) dampr2 = __get_DAMPR(2); - vaddr = kmap_atomic(page, __KM_CACHE); + vaddr = kmap_atomic_primary(page, __KM_CACHE); frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE); - kunmap_atomic(vaddr, __KM_CACHE); + kunmap_atomic_primary(vaddr, __KM_CACHE); if (dampr2) { __set_DAMPR(2, dampr2); @@ -54,12 +54,12 @@ void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, dampr2 = __get_DAMPR(2); - vaddr = kmap_atomic(page, __KM_CACHE); + vaddr = kmap_atomic_primary(page, __KM_CACHE); start = (start & ~PAGE_MASK) | (unsigned long) vaddr; frv_cache_wback_inv(start, start + len); - kunmap_atomic(vaddr, __KM_CACHE); + kunmap_atomic_primary(vaddr, __KM_CACHE); if (dampr2) { __set_DAMPR(2, dampr2); diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c index eadd076..61088dc 100644 --- a/arch/frv/mm/highmem.c +++ b/arch/frv/mm/highmem.c @@ -36,3 +36,53 @@ struct page *kmap_atomic_to_page(void *ptr) { return virt_to_page(ptr); } + +void *__kmap_atomic(struct page *page) +{ + unsigned long paddr; + int type; + + pagefault_disable(); + type = kmap_atomic_idx_push(); + paddr = page_to_phys(page); + + switch (type) { + /* + * The first 4 primary maps are reserved for architecture code + */ + case 0: return __kmap_atomic_primary(4, paddr, 6); + case 1: return __kmap_atomic_primary(5, paddr, 7); + case 2: return __kmap_atomic_primary(6, paddr, 8); + case 3: return __kmap_atomic_primary(7, paddr, 9); + case 4: return __kmap_atomic_primary(8, paddr, 10); + + case 5 ... 5 + NR_TLB_LINES - 1: + return __kmap_atomic_secondary(type - 5, paddr); + + default: + BUG(); + return NULL; + } +} +EXPORT_SYMBOL(__kmap_atomic); + +void __kunmap_atomic(void *kvaddr) +{ + int type = kmap_atomic_idx_pop(); + switch (type) { + case 0: __kunmap_atomic_primary(4, 6); break; + case 1: __kunmap_atomic_primary(5, 7); break; + case 2: __kunmap_atomic_primary(6, 8); break; + case 3: __kunmap_atomic_primary(7, 9); break; + case 4: __kunmap_atomic_primary(8, 10); break; + + case 5 ... 5 + NR_TLB_LINES - 1: + __kunmap_atomic_secondary(type - 5, kvaddr); + break; + + default: + BUG(); + } + pagefault_enable(); +} +EXPORT_SYMBOL(__kunmap_atomic); diff --git a/arch/mips/include/asm/highmem.h b/arch/mips/include/asm/highmem.h index 75753ca..77e6440 100644 --- a/arch/mips/include/asm/highmem.h +++ b/arch/mips/include/asm/highmem.h @@ -45,18 +45,12 @@ extern pte_t *pkmap_page_table; extern void * kmap_high(struct page *page); extern void kunmap_high(struct page *page); -extern void *__kmap(struct page *page); -extern void __kunmap(struct page *page); -extern void *__kmap_atomic(struct page *page, enum km_type type); -extern void __kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); -extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); -extern struct page *__kmap_atomic_to_page(void *ptr); - -#define kmap __kmap -#define kunmap __kunmap -#define kmap_atomic __kmap_atomic -#define kunmap_atomic_notypecheck __kunmap_atomic_notypecheck -#define kmap_atomic_to_page __kmap_atomic_to_page +extern void *kmap(struct page *page); +extern void kunmap(struct page *page); +extern void *__kmap_atomic(struct page *page); +extern void __kunmap_atomic(void *kvaddr); +extern void *kmap_atomic_pfn(unsigned long pfn); +extern struct page *kmap_atomic_to_page(void *ptr); #define flush_cache_kmaps() flush_cache_all() diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c index 6a2b1bf..1e69b1f 100644 --- a/arch/mips/mm/highmem.c +++ b/arch/mips/mm/highmem.c @@ -9,7 +9,7 @@ static pte_t *kmap_pte; unsigned long highstart_pfn, highend_pfn; -void *__kmap(struct page *page) +void *kmap(struct page *page) { void *addr; @@ -21,16 +21,16 @@ void *__kmap(struct page *page) return addr; } -EXPORT_SYMBOL(__kmap); +EXPORT_SYMBOL(kmap); -void __kunmap(struct page *page) +void kunmap(struct page *page) { BUG_ON(in_interrupt()); if (!PageHighMem(page)) return; kunmap_high(page); } -EXPORT_SYMBOL(__kunmap); +EXPORT_SYMBOL(kunmap); /* * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because @@ -41,17 +41,17 @@ EXPORT_SYMBOL(__kunmap); * kmaps are appropriate for short, tight code paths only. */ -void *__kmap_atomic(struct page *page, enum km_type type) +void *__kmap_atomic(struct page *page) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */ pagefault_disable(); if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #ifdef CONFIG_DEBUG_HIGHMEM @@ -64,43 +64,47 @@ void *__kmap_atomic(struct page *page, enum km_type type) } EXPORT_SYMBOL(__kmap_atomic); -void __kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { -#ifdef CONFIG_DEBUG_HIGHMEM unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id(); + int type; if (vaddr < FIXADDR_START) { // FIXME pagefault_enable(); return; } - BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); + type = kmap_atomic_idx_pop(); +#ifdef CONFIG_DEBUG_HIGHMEM + { + int idx = type + KM_TYPE_NR * smp_processor_id(); - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(&init_mm, vaddr, kmap_pte-idx); - local_flush_tlb_one(vaddr); -#endif + BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); + /* + * force other mappings to Oops if they'll try to access + * this pte without first remap it + */ + pte_clear(&init_mm, vaddr, kmap_pte-idx); + local_flush_tlb_one(vaddr); + } +#endif pagefault_enable(); } -EXPORT_SYMBOL(__kunmap_atomic_notypecheck); +EXPORT_SYMBOL(__kunmap_atomic); /* * This is the same as kmap_atomic() but can map memory that doesn't * have a struct page associated with it. */ -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) +void *kmap_atomic_pfn(unsigned long pfn) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; pagefault_disable(); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); set_pte(kmap_pte-idx, pfn_pte(pfn, PAGE_KERNEL)); @@ -109,7 +113,7 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) return (void*) vaddr; } -struct page *__kmap_atomic_to_page(void *ptr) +struct page *kmap_atomic_to_page(void *ptr) { unsigned long idx, vaddr = (unsigned long)ptr; pte_t *pte; diff --git a/arch/mn10300/include/asm/highmem.h b/arch/mn10300/include/asm/highmem.h index b0b187a..f577ba2 100644 --- a/arch/mn10300/include/asm/highmem.h +++ b/arch/mn10300/include/asm/highmem.h @@ -70,15 +70,16 @@ static inline void kunmap(struct page *page) * be used in IRQ contexts, so in some (very limited) cases we need * it. */ -static inline unsigned long kmap_atomic(struct page *page, enum km_type type) +static inline unsigned long __kmap_atomic(struct page *page) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; + pagefault_disable(); if (page < highmem_start_page) return page_address(page); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #if HIGHMEM_DEBUG @@ -91,26 +92,35 @@ static inline unsigned long kmap_atomic(struct page *page, enum km_type type) return vaddr; } -static inline void kunmap_atomic_notypecheck(unsigned long vaddr, enum km_type type) +static inline void __kunmap_atomic(unsigned long vaddr) { -#if HIGHMEM_DEBUG - enum fixed_addresses idx = type + KM_TYPE_NR * smp_processor_id(); + int type; - if (vaddr < FIXADDR_START) /* FIXME */ + if (vaddr < FIXADDR_START) { /* FIXME */ + pagefault_enable(); return; + } - if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)) - BUG(); + type = kmap_atomic_idx_pop(); - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(kmap_pte - idx); - __flush_tlb_one(vaddr); +#if HIGHMEM_DEBUG + { + unsigned int idx; + idx = type + KM_TYPE_NR * smp_processor_id(); + + if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)) + BUG(); + + /* + * force other mappings to Oops if they'll try to access + * this pte without first remap it + */ + pte_clear(kmap_pte - idx); + __flush_tlb_one(vaddr); + } #endif + pagefault_enable(); } - #endif /* __KERNEL__ */ #endif /* _ASM_HIGHMEM_H */ diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h index d10d64a..dbc2640 100644 --- a/arch/powerpc/include/asm/highmem.h +++ b/arch/powerpc/include/asm/highmem.h @@ -60,9 +60,8 @@ extern pte_t *pkmap_page_table; extern void *kmap_high(struct page *page); extern void kunmap_high(struct page *page); -extern void *kmap_atomic_prot(struct page *page, enum km_type type, - pgprot_t prot); -extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); +extern void *kmap_atomic_prot(struct page *page, pgprot_t prot); +extern void __kunmap_atomic(void *kvaddr); static inline void *kmap(struct page *page) { @@ -80,9 +79,9 @@ static inline void kunmap(struct page *page) kunmap_high(page); } -static inline void *kmap_atomic(struct page *page, enum km_type type) +static inline void *__kmap_atomic(struct page *page) { - return kmap_atomic_prot(page, type, kmap_prot); + return kmap_atomic_prot(page, kmap_prot); } static inline struct page *kmap_atomic_to_page(void *ptr) diff --git a/arch/powerpc/mm/highmem.c b/arch/powerpc/mm/highmem.c index 857d417..b0848b4 100644 --- a/arch/powerpc/mm/highmem.c +++ b/arch/powerpc/mm/highmem.c @@ -29,17 +29,17 @@ * be used in IRQ contexts, so in some (very limited) cases we need * it. */ -void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) +void *kmap_atomic_prot(struct page *page, pgprot_t prot) { - unsigned int idx; unsigned long vaddr; + int idx, type; /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */ pagefault_disable(); if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); #ifdef CONFIG_DEBUG_HIGHMEM @@ -52,26 +52,33 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) } EXPORT_SYMBOL(kmap_atomic_prot); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { -#ifdef CONFIG_DEBUG_HIGHMEM unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id(); + int type; if (vaddr < __fix_to_virt(FIX_KMAP_END)) { pagefault_enable(); return; } - BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); + type = kmap_atomic_idx_pop(); - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(&init_mm, vaddr, kmap_pte-idx); - local_flush_tlb_page(NULL, vaddr); +#ifdef CONFIG_DEBUG_HIGHMEM + { + unsigned int idx; + + idx = type + KM_TYPE_NR * smp_processor_id(); + BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); + + /* + * force other mappings to Oops if they'll try to access + * this pte without first remap it + */ + pte_clear(&init_mm, vaddr, kmap_pte-idx); + local_flush_tlb_page(NULL, vaddr); + } #endif pagefault_enable(); } -EXPORT_SYMBOL(kunmap_atomic_notypecheck); +EXPORT_SYMBOL(__kunmap_atomic); diff --git a/arch/sparc/include/asm/highmem.h b/arch/sparc/include/asm/highmem.h index ec23b0a..3d7afbb 100644 --- a/arch/sparc/include/asm/highmem.h +++ b/arch/sparc/include/asm/highmem.h @@ -70,8 +70,8 @@ static inline void kunmap(struct page *page) kunmap_high(page); } -extern void *kmap_atomic(struct page *page, enum km_type type); -extern void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); +extern void *__kmap_atomic(struct page *page); +extern void __kunmap_atomic(void *kvaddr); extern struct page *kmap_atomic_to_page(void *vaddr); #define flush_cache_kmaps() flush_cache_all() diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c index e139e9c..5e50c09 100644 --- a/arch/sparc/mm/highmem.c +++ b/arch/sparc/mm/highmem.c @@ -29,17 +29,17 @@ #include <asm/tlbflush.h> #include <asm/fixmap.h> -void *kmap_atomic(struct page *page, enum km_type type) +void *__kmap_atomic(struct page *page) { - unsigned long idx; unsigned long vaddr; + long idx, type; /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */ pagefault_disable(); if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); @@ -63,44 +63,50 @@ void *kmap_atomic(struct page *page, enum km_type type) return (void*) vaddr; } -EXPORT_SYMBOL(kmap_atomic); +EXPORT_SYMBOL(__kmap_atomic); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { -#ifdef CONFIG_DEBUG_HIGHMEM unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - unsigned long idx = type + KM_TYPE_NR*smp_processor_id(); + int type; if (vaddr < FIXADDR_START) { // FIXME pagefault_enable(); return; } - BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx)); + type = kmap_atomic_idx_pop(); -/* XXX Fix - Anton */ +#ifdef CONFIG_DEBUG_HIGHMEM + { + unsigned long idx; + + idx = type + KM_TYPE_NR * smp_processor_id(); + BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx)); + + /* XXX Fix - Anton */ #if 0 - __flush_cache_one(vaddr); + __flush_cache_one(vaddr); #else - flush_cache_all(); + flush_cache_all(); #endif - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(&init_mm, vaddr, kmap_pte-idx); -/* XXX Fix - Anton */ + /* + * force other mappings to Oops if they'll try to access + * this pte without first remap it + */ + pte_clear(&init_mm, vaddr, kmap_pte-idx); + /* XXX Fix - Anton */ #if 0 - __flush_tlb_one(vaddr); + __flush_tlb_one(vaddr); #else - flush_tlb_all(); + flush_tlb_all(); #endif + } #endif - pagefault_enable(); } -EXPORT_SYMBOL(kunmap_atomic_notypecheck); +EXPORT_SYMBOL(__kunmap_atomic); /* We may be fed a pagetable here by ptep_to_xxx and others. */ struct page *kmap_atomic_to_page(void *ptr) diff --git a/arch/tile/include/asm/highmem.h b/arch/tile/include/asm/highmem.h index d155db6..e0f7ee18 100644 --- a/arch/tile/include/asm/highmem.h +++ b/arch/tile/include/asm/highmem.h @@ -60,12 +60,12 @@ void *kmap_fix_kpte(struct page *page, int finished); /* This macro is used only in map_new_virtual() to map "page". */ #define kmap_prot page_to_kpgprot(page) -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); -void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); +void *__kmap_atomic(struct page *page); +void __kunmap_atomic(void *kvaddr); +void *kmap_atomic_pfn(unsigned long pfn); +void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot); struct page *kmap_atomic_to_page(void *ptr); -void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot); -void *kmap_atomic(struct page *page, enum km_type type); +void *kmap_atomic_prot(struct page *page, pgprot_t prot); void kmap_atomic_fix_kpte(struct page *page, int finished); #define flush_cache_kmaps() do { } while (0) diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c index 12ab137..8ef6595 100644 --- a/arch/tile/mm/highmem.c +++ b/arch/tile/mm/highmem.c @@ -56,50 +56,6 @@ void kunmap(struct page *page) } EXPORT_SYMBOL(kunmap); -static void debug_kmap_atomic_prot(enum km_type type) -{ -#ifdef CONFIG_DEBUG_HIGHMEM - static unsigned warn_count = 10; - - if (unlikely(warn_count == 0)) - return; - - if (unlikely(in_interrupt())) { - if (in_irq()) { - if (type != KM_IRQ0 && type != KM_IRQ1 && - type != KM_BIO_SRC_IRQ && - /* type != KM_BIO_DST_IRQ && */ - type != KM_BOUNCE_READ) { - WARN_ON(1); - warn_count--; - } - } else if (!irqs_disabled()) { /* softirq */ - if (type != KM_IRQ0 && type != KM_IRQ1 && - type != KM_SOFTIRQ0 && type != KM_SOFTIRQ1 && - type != KM_SKB_SUNRPC_DATA && - type != KM_SKB_DATA_SOFTIRQ && - type != KM_BOUNCE_READ) { - WARN_ON(1); - warn_count--; - } - } - } - - if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ || - type == KM_BIO_SRC_IRQ /* || type == KM_BIO_DST_IRQ */) { - if (!irqs_disabled()) { - WARN_ON(1); - warn_count--; - } - } else if (type == KM_SOFTIRQ0 || type == KM_SOFTIRQ1) { - if (irq_count() == 0 && !irqs_disabled()) { - WARN_ON(1); - warn_count--; - } - } -#endif -} - /* * Describe a single atomic mapping of a page on a given cpu at a * given address, and allow it to be linked into a list. @@ -240,10 +196,10 @@ void kmap_atomic_fix_kpte(struct page *page, int finished) * When holding an atomic kmap is is not legal to sleep, so atomic * kmaps are appropriate for short, tight code paths only. */ -void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) +void *kmap_atomic_prot(struct page *page, pgprot_t prot) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; pte_t *pte; /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */ @@ -255,8 +211,7 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic_prot(type); - + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); pte = kmap_get_pte(vaddr); @@ -269,25 +224,31 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) } EXPORT_SYMBOL(kmap_atomic_prot); -void *kmap_atomic(struct page *page, enum km_type type) +void *__kmap_atomic(struct page *page) { /* PAGE_NONE is a magic value that tells us to check immutability. */ return kmap_atomic_prot(page, type, PAGE_NONE); } -EXPORT_SYMBOL(kmap_atomic); +EXPORT_SYMBOL(__kmap_atomic); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id(); - /* - * Force other mappings to Oops if they try to access this pte without - * first remapping it. Keeping stale mappings around is a bad idea. - */ - if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx)) { + if (vaddr >= __fix_to_virt(FIX_KMAP_END) && + vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) { pte_t *pte = kmap_get_pte(vaddr); pte_t pteval = *pte; + int idx, type; + + type = kmap_atomic_idx_pop(); + idx = type + KM_TYPE_NR*smp_processor_id(); + + /* + * Force other mappings to Oops if they try to access this pte + * without first remapping it. Keeping stale mappings around + * is a bad idea. + */ BUG_ON(!pte_present(pteval) && !pte_migrating(pteval)); kmap_atomic_unregister(pte_page(pteval), vaddr); kpte_clear_flush(pte, vaddr); @@ -300,19 +261,19 @@ void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) arch_flush_lazy_mmu_mode(); pagefault_enable(); } -EXPORT_SYMBOL(kunmap_atomic_notypecheck); +EXPORT_SYMBOL(__kunmap_atomic); /* * This API is supposed to allow us to map memory without a "struct page". * Currently we don't support this, though this may change in the future. */ -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) +void *kmap_atomic_pfn(unsigned long pfn) { - return kmap_atomic(pfn_to_page(pfn), type); + return kmap_atomic(pfn_to_page(pfn)); } -void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) +void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) { - return kmap_atomic_prot(pfn_to_page(pfn), type, prot); + return kmap_atomic_prot(pfn_to_page(pfn), prot); } struct page *kmap_atomic_to_page(void *ptr) diff --git a/arch/x86/include/asm/highmem.h b/arch/x86/include/asm/highmem.h index 8caac76..3bd0402 100644 --- a/arch/x86/include/asm/highmem.h +++ b/arch/x86/include/asm/highmem.h @@ -59,11 +59,12 @@ extern void kunmap_high(struct page *page); void *kmap(struct page *page); void kunmap(struct page *page); -void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot); -void *kmap_atomic(struct page *page, enum km_type type); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type); -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); -void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); + +void *kmap_atomic_prot(struct page *page, pgprot_t prot); +void *__kmap_atomic(struct page *page); +void __kunmap_atomic(void *kvaddr); +void *kmap_atomic_pfn(unsigned long pfn); +void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot); struct page *kmap_atomic_to_page(void *ptr); #define flush_cache_kmaps() do { } while (0) diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h index c4191b3..363e33e 100644 --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -27,10 +27,10 @@ #include <asm/tlbflush.h> void __iomem * -iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); +iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot); void -iounmap_atomic(void __iomem *kvaddr, enum km_type type); +iounmap_atomic(void __iomem *kvaddr); int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot); diff --git a/arch/x86/kernel/crash_dump_32.c b/arch/x86/kernel/crash_dump_32.c index 6741455..d5cd139 100644 --- a/arch/x86/kernel/crash_dump_32.c +++ b/arch/x86/kernel/crash_dump_32.c @@ -61,7 +61,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, if (!is_crashed_pfn_valid(pfn)) return -EFAULT; - vaddr = kmap_atomic_pfn(pfn, KM_PTE0); + vaddr = kmap_atomic_pfn(pfn); if (!userbuf) { memcpy(buf, (vaddr + offset), csize); diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c index 5e8fa12..d723e36 100644 --- a/arch/x86/mm/highmem_32.c +++ b/arch/x86/mm/highmem_32.c @@ -9,6 +9,7 @@ void *kmap(struct page *page) return page_address(page); return kmap_high(page); } +EXPORT_SYMBOL(kmap); void kunmap(struct page *page) { @@ -18,6 +19,7 @@ void kunmap(struct page *page) return; kunmap_high(page); } +EXPORT_SYMBOL(kunmap); /* * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because @@ -27,10 +29,10 @@ void kunmap(struct page *page) * However when holding an atomic kmap it is not legal to sleep, so atomic * kmaps are appropriate for short, tight code paths only. */ -void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) +void *kmap_atomic_prot(struct page *page, pgprot_t prot) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */ pagefault_disable(); @@ -38,8 +40,7 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) if (!PageHighMem(page)) return page_address(page); - debug_kmap_atomic(type); - + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR*smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); BUG_ON(!pte_none(*(kmap_pte-idx))); @@ -47,44 +48,56 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot) return (void *)vaddr; } +EXPORT_SYMBOL(kmap_atomic_prot); + +void *__kmap_atomic(struct page *page) +{ + return kmap_atomic_prot(page, kmap_prot); +} +EXPORT_SYMBOL(__kmap_atomic); -void *kmap_atomic(struct page *page, enum km_type type) +/* + * This is the same as kmap_atomic() but can map memory that doesn't + * have a struct page associated with it. + */ +void *kmap_atomic_pfn(unsigned long pfn) { - return kmap_atomic_prot(page, type, kmap_prot); + return kmap_atomic_prot_pfn(pfn, kmap_prot); } +EXPORT_SYMBOL_GPL(kmap_atomic_pfn); -void kunmap_atomic_notypecheck(void *kvaddr, enum km_type type) +void __kunmap_atomic(void *kvaddr) { unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id(); - - /* - * Force other mappings to Oops if they'll try to access this pte - * without first remap it. Keeping stale mappings around is a bad idea - * also, in case the page changes cacheability attributes or becomes - * a protected page in a hypervisor. - */ - if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx)) + + if (vaddr >= __fix_to_virt(FIX_KMAP_END) && + vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) { + int idx, type; + + type = kmap_atomic_idx_pop(); + idx = type + KM_TYPE_NR * smp_processor_id(); + +#ifdef CONFIG_DEBUG_HIGHMEM + WARN_ON_ONCE(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); +#endif + /* + * Force other mappings to Oops if they'll try to access this + * pte without first remap it. Keeping stale mappings around + * is a bad idea also, in case the page changes cacheability + * attributes or becomes a protected page in a hypervisor. + */ kpte_clear_flush(kmap_pte-idx, vaddr); - else { + } #ifdef CONFIG_DEBUG_HIGHMEM + else { BUG_ON(vaddr < PAGE_OFFSET); BUG_ON(vaddr >= (unsigned long)high_memory); -#endif } +#endif pagefault_enable(); } - -/* - * This is the same as kmap_atomic() but can map memory that doesn't - * have a struct page associated with it. - */ -void *kmap_atomic_pfn(unsigned long pfn, enum km_type type) -{ - return kmap_atomic_prot_pfn(pfn, type, kmap_prot); -} -EXPORT_SYMBOL_GPL(kmap_atomic_pfn); /* temporarily in use by i915 GEM until vmap */ +EXPORT_SYMBOL(__kunmap_atomic); struct page *kmap_atomic_to_page(void *ptr) { @@ -98,12 +111,6 @@ struct page *kmap_atomic_to_page(void *ptr) pte = kmap_pte - (idx - FIX_KMAP_BEGIN); return pte_page(*pte); } - -EXPORT_SYMBOL(kmap); -EXPORT_SYMBOL(kunmap); -EXPORT_SYMBOL(kmap_atomic); -EXPORT_SYMBOL(kunmap_atomic_notypecheck); -EXPORT_SYMBOL(kmap_atomic_prot); EXPORT_SYMBOL(kmap_atomic_to_page); void __init set_highmem_pages_init(void) diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 72fc70c..75a3d7f 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -48,21 +48,20 @@ int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot) } EXPORT_SYMBOL_GPL(iomap_create_wc); -void -iomap_free(resource_size_t base, unsigned long size) +void iomap_free(resource_size_t base, unsigned long size) { io_free_memtype(base, base + size); } EXPORT_SYMBOL_GPL(iomap_free); -void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) +void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) { - enum fixed_addresses idx; unsigned long vaddr; + int idx, type; pagefault_disable(); - debug_kmap_atomic(type); + type = kmap_atomic_idx_push(); idx = type + KM_TYPE_NR * smp_processor_id(); vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); set_pte(kmap_pte - idx, pfn_pte(pfn, prot)); @@ -72,10 +71,10 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) } /* - * Map 'pfn' using fixed map 'type' and protections 'prot' + * Map 'pfn' using protections 'prot' */ void __iomem * -iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) +iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) { /* * For non-PAT systems, promote PAGE_KERNEL_WC to PAGE_KERNEL_UC_MINUS. @@ -86,24 +85,33 @@ iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC)) prot = PAGE_KERNEL_UC_MINUS; - return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, type, prot); + return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, prot); } EXPORT_SYMBOL_GPL(iomap_atomic_prot_pfn); void -iounmap_atomic(void __iomem *kvaddr, enum km_type type) +iounmap_atomic(void __iomem *kvaddr) { unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id(); - /* - * Force other mappings to Oops if they'll try to access this pte - * without first remap it. Keeping stale mappings around is a bad idea - * also, in case the page changes cacheability attributes or becomes - * a protected page in a hypervisor. - */ - if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx)) + if (vaddr >= __fix_to_virt(FIX_KMAP_END) && + vaddr <= __fix_to_virt(FIX_KMAP_BEGIN)) { + int idx, type; + + type = kmap_atomic_idx_pop(); + idx = type + KM_TYPE_NR * smp_processor_id(); + +#ifdef CONFIG_DEBUG_HIGHMEM + WARN_ON_ONCE(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); +#endif + /* + * Force other mappings to Oops if they'll try to access this + * pte without first remap it. Keeping stale mappings around + * is a bad idea also, in case the page changes cacheability + * attributes or becomes a protected page in a hypervisor. + */ kpte_clear_flush(kmap_pte-idx, vaddr); + } pagefault_enable(); } |