diff options
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/init_64.c | 21 | ||||
| -rw-r--r-- | arch/x86/mm/pgtable.c | 20 | ||||
| -rw-r--r-- | arch/x86/mm/pgtable_32.c | 20 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten.c | 29 | ||||
| -rw-r--r-- | include/asm-x86/fixmap.h | 55 | ||||
| -rw-r--r-- | include/asm-x86/fixmap_32.h | 42 | ||||
| -rw-r--r-- | include/asm-x86/fixmap_64.h | 37 | ||||
| -rw-r--r-- | include/asm-x86/paravirt.h | 13 | ||||
| -rw-r--r-- | include/asm-x86/pgtable.h | 3 |
10 files changed, 130 insertions, 112 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 74f0c5ea2a03..cf06670349dc 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -416,6 +416,8 @@ struct pv_mmu_ops pv_mmu_ops = { .enter = paravirt_nop, .leave = paravirt_nop, }, + + .set_fixmap = native_set_fixmap, }; EXPORT_SYMBOL_GPL(pv_time_ops); diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 156e6d7b0e32..74fae8335128 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -135,15 +135,15 @@ static __init void *spp_getpage(void) return ptr; } -static void -set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot) +void +set_pte_vaddr(unsigned long vaddr, pte_t new_pte) { pgd_t *pgd; pud_t *pud; pmd_t *pmd; - pte_t *pte, new_pte; + pte_t *pte; - pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys); + pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte)); pgd = pgd_offset_k(vaddr); if (pgd_none(*pgd)) { @@ -170,7 +170,6 @@ set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot) return; } } - new_pte = pfn_pte(phys >> PAGE_SHIFT, prot); pte = pte_offset_kernel(pmd, vaddr); if (!pte_none(*pte) && pte_val(new_pte) && @@ -213,18 +212,6 @@ void __init cleanup_highmap(void) } } -/* NOTE: this is meant to be run only at boot */ -void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) -{ - unsigned long address = __fix_to_virt(idx); - - if (idx >= __end_of_fixed_addresses) { - printk(KERN_ERR "Invalid __set_fixmap\n"); - return; - } - set_pte_phys(address, phys, prot); -} - static unsigned long __initdata table_start; static unsigned long __meminitdata table_end; diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 50159764f694..892fd1892b8d 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -2,6 +2,7 @@ #include <asm/pgalloc.h> #include <asm/pgtable.h> #include <asm/tlb.h> +#include <asm/fixmap.h> pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { @@ -274,3 +275,22 @@ int ptep_clear_flush_young(struct vm_area_struct *vma, return young; } + +int fixmaps_set; + +void __native_set_fixmap(enum fixed_addresses idx, pte_t pte) +{ + unsigned long address = __fix_to_virt(idx); + + if (idx >= __end_of_fixed_addresses) { + BUG(); + return; + } + set_pte_vaddr(address, pte); + fixmaps_set++; +} + +void native_set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t flags) +{ + __native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags)); +} diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c index 369cf065b6a4..0662f345212f 100644 --- a/arch/x86/mm/pgtable_32.c +++ b/arch/x86/mm/pgtable_32.c @@ -71,7 +71,7 @@ void show_mem(void) * Associate a virtual page frame with a given physical page frame * and protection flags for that frame. */ -static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags) +void set_pte_vaddr(unsigned long vaddr, pte_t pteval) { pgd_t *pgd; pud_t *pud; @@ -94,8 +94,8 @@ static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags) return; } pte = pte_offset_kernel(pmd, vaddr); - if (pgprot_val(flags)) - set_pte_present(&init_mm, vaddr, pte, pfn_pte(pfn, flags)); + if (pte_val(pteval)) + set_pte_present(&init_mm, vaddr, pte, pteval); else pte_clear(&init_mm, vaddr, pte); @@ -145,18 +145,6 @@ static int fixmaps; unsigned long __FIXADDR_TOP = 0xfffff000; EXPORT_SYMBOL(__FIXADDR_TOP); -void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) -{ - unsigned long address = __fix_to_virt(idx); - - if (idx >= __end_of_fixed_addresses) { - BUG(); - return; - } - set_pte_pfn(address, phys >> PAGE_SHIFT, flags); - fixmaps++; -} - /** * reserve_top_address - reserves a hole in the top of kernel address space * @reserve - size of hole to reserve @@ -166,7 +154,7 @@ void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) */ void reserve_top_address(unsigned long reserve) { - BUG_ON(fixmaps > 0); + BUG_ON(fixmaps_set > 0); printk(KERN_INFO "Reserving virtual address space above 0x%08x\n", (int)-reserve); __FIXADDR_TOP = -reserve - PAGE_SIZE; diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index f09c1c69c37a..2d19382e6555 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -947,6 +947,33 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf, return ret; } +static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot) +{ + pte_t pte; + + phys >>= PAGE_SHIFT; + + switch (idx) { + case FIX_BTMAP_END ... FIX_BTMAP_BEGIN: +#ifdef CONFIG_X86_F00F_BUG + case FIX_F00F_IDT: +#endif + case FIX_WP_TEST: + case FIX_VDSO: +#ifdef CONFIG_X86_LOCAL_APIC + case FIX_APIC_BASE: /* maps dummy local APIC */ +#endif + pte = pfn_pte(phys, prot); + break; + + default: + pte = mfn_pte(phys, prot); + break; + } + + __native_set_fixmap(idx, pte); +} + static const struct pv_info xen_info __initdata = { .paravirt_enabled = 1, .shared_kernel_pmd = 0, @@ -1097,6 +1124,8 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .enter = paravirt_enter_lazy_mmu, .leave = xen_leave_lazy, }, + + .set_fixmap = xen_set_fixmap, }; #ifdef CONFIG_SMP diff --git a/include/asm-x86/fixmap.h b/include/asm-x86/fixmap.h index 5bd206973dca..44d4f8217349 100644 --- a/include/asm-x86/fixmap.h +++ b/include/asm-x86/fixmap.h @@ -7,7 +7,62 @@ # include "fixmap_64.h" #endif +extern int fixmaps_set; + +void __native_set_fixmap(enum fixed_addresses idx, pte_t pte); +void native_set_fixmap(enum fixed_addresses idx, + unsigned long phys, pgprot_t flags); + +#ifndef CONFIG_PARAVIRT +static inline void __set_fixmap(enum fixed_addresses idx, + unsigned long phys, pgprot_t flags) +{ + native_set_fixmap(idx, phys, flags); +} +#endif + +#define set_fixmap(idx, phys) \ + __set_fixmap(idx, phys, PAGE_KERNEL) + +/* + * Some hardware wants to get fixmapped without caching. + */ +#define set_fixmap_nocache(idx, phys) \ + __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) + #define clear_fixmap(idx) \ __set_fixmap(idx, 0, __pgprot(0)) +#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) +#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) + +extern void __this_fixmap_does_not_exist(void); + +/* + * 'index to address' translation. If anyone tries to use the idx + * directly without translation, we catch the bug with a NULL-deference + * kernel oops. Illegal ranges of incoming indices are caught too. + */ +static __always_inline unsigned long fix_to_virt(const unsigned int idx) +{ + /* + * this branch gets completely eliminated after inlining, + * except when someone tries to use fixaddr indices in an + * illegal way. (such as mixing up address types or using + * out-of-range indices). + * + * If it doesn't get removed, the linker will complain + * loudly with a reasonably clear error message.. + */ + if (idx >= __end_of_fixed_addresses) + __this_fixmap_does_not_exist(); + + return __fix_to_virt(idx); +} + +static inline unsigned long virt_to_fix(const unsigned long vaddr) +{ + BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); + return __virt_to_fix(vaddr); +} #endif diff --git a/include/asm-x86/fixmap_32.h b/include/asm-x86/fixmap_32.h index 4b96148e90c1..3a94115952ff 100644 --- a/include/asm-x86/fixmap_32.h +++ b/include/asm-x86/fixmap_32.h @@ -109,17 +109,8 @@ enum fixed_addresses { __end_of_fixed_addresses }; -extern void __set_fixmap(enum fixed_addresses idx, - unsigned long phys, pgprot_t flags); extern void reserve_top_address(unsigned long reserve); -#define set_fixmap(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL) -/* - * Some hardware wants to get fixmapped without caching. - */ -#define set_fixmap_nocache(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) #define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP) @@ -128,38 +119,5 @@ extern void reserve_top_address(unsigned long reserve); #define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE) #define FIXADDR_BOOT_START (FIXADDR_TOP - __FIXADDR_BOOT_SIZE) -#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) -#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) - -extern void __this_fixmap_does_not_exist(void); - -/* - * 'index to address' translation. If anyone tries to use the idx - * directly without tranlation, we catch the bug with a NULL-deference - * kernel oops. Illegal ranges of incoming indices are caught too. - */ -static __always_inline unsigned long fix_to_virt(const unsigned int idx) -{ - /* - * this branch gets completely eliminated after inlining, - * except when someone tries to use fixaddr indices in an - * illegal way. (such as mixing up address types or using - * out-of-range indices). - * - * If it doesn't get removed, the linker will complain - * loudly with a reasonably clear error message.. - */ - if (idx >= __end_of_fixed_addresses) - __this_fixmap_does_not_exist(); - - return __fix_to_virt(idx); -} - -static inline unsigned long virt_to_fix(const unsigned long vaddr) -{ - BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); - return __virt_to_fix(vaddr); -} - #endif /* !__ASSEMBLY__ */ #endif diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h index 355d26a75a82..626098823a0c 100644 --- a/include/asm-x86/fixmap_64.h +++ b/include/asm-x86/fixmap_64.h @@ -52,17 +52,6 @@ enum fixed_addresses { __end_of_fixed_addresses }; -extern void __set_fixmap(enum fixed_addresses idx, - unsigned long phys, pgprot_t flags); - -#define set_fixmap(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL) -/* - * Some hardware wants to get fixmapped without caching. - */ -#define set_fixmap_nocache(idx, phys) \ - __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE) - #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE) #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) @@ -71,30 +60,4 @@ extern void __set_fixmap(enum fixed_addresses idx, #define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL) #define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE) -#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) - -extern void __this_fixmap_does_not_exist(void); - -/* - * 'index to address' translation. If anyone tries to use the idx - * directly without translation, we catch the bug with a NULL-deference - * kernel oops. Illegal ranges of incoming indices are caught too. - */ -static __always_inline unsigned long fix_to_virt(const unsigned int idx) -{ - /* - * this branch gets completely eliminated after inlining, - * except when someone tries to use fixaddr indices in an - * illegal way. (such as mixing up address types or using - * out-of-range indices). - * - * If it doesn't get removed, the linker will complain - * loudly with a reasonably clear error message.. - */ - if (idx >= __end_of_fixed_addresses) - __this_fixmap_does_not_exist(); - - return __fix_to_virt(idx); -} - #endif diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 0f13b945e240..af85caf9a799 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -273,6 +273,13 @@ struct pv_mmu_ops { #endif struct pv_lazy_ops lazy_mode; + + /* dom0 ops */ + + /* Sometimes the physical address is a pfn, and sometimes its + an mfn. We can tell which is which from the index. */ + void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, + unsigned long phys, pgprot_t flags); }; /* This contains all the paravirt structures: we get a convenient @@ -1252,6 +1259,12 @@ static inline void arch_flush_lazy_mmu_mode(void) } } +static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx, + unsigned long phys, pgprot_t flags) +{ + pv_mmu_ops.set_fixmap(idx, phys, flags); +} + void _paravirt_nop(void); #define paravirt_nop ((void *)_paravirt_nop) diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 97c271b2910b..702f2699c6df 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -318,6 +318,9 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, unsigned long size, pgprot_t *vma_prot); #endif +/* Install a pte for a particular vaddr in kernel space. */ +void set_pte_vaddr(unsigned long vaddr, pte_t pte); + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else /* !CONFIG_PARAVIRT */ |