diff options
| -rw-r--r-- | arch/x86/include/asm/paravirt.h | 33 | ||||
| -rw-r--r-- | arch/x86/include/asm/paravirt_types.h | 12 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgalloc.h | 35 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 59 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgtable_64.h | 12 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgtable_types.h | 10 | ||||
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 10 | ||||
| -rw-r--r-- | arch/x86/mm/init_64.c | 183 | ||||
| -rw-r--r-- | arch/x86/xen/mmu.c | 152 | ||||
| -rw-r--r-- | include/trace/events/xen.h | 28 |
11 files changed, 401 insertions, 141 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 0489884fdc44..158d877ce9e9 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -536,7 +536,7 @@ static inline void set_pud(pud_t *pudp, pud_t pud) PVOP_VCALL2(pv_mmu_ops.set_pud, pudp, val); } -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 static inline pud_t __pud(pudval_t val) { pudval_t ret; @@ -565,6 +565,32 @@ static inline pudval_t pud_val(pud_t pud) return ret; } +static inline void pud_clear(pud_t *pudp) +{ + set_pud(pudp, __pud(0)); +} + +static inline void set_p4d(p4d_t *p4dp, p4d_t p4d) +{ + p4dval_t val = native_p4d_val(p4d); + + if (sizeof(p4dval_t) > sizeof(long)) + PVOP_VCALL3(pv_mmu_ops.set_p4d, p4dp, + val, (u64)val >> 32); + else + PVOP_VCALL2(pv_mmu_ops.set_p4d, p4dp, + val); +} + +static inline void p4d_clear(p4d_t *p4dp) +{ + set_p4d(p4dp, __p4d(0)); +} + +#if CONFIG_PGTABLE_LEVELS >= 5 + +#error FIXME + static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) { pgdval_t val = native_pgd_val(pgd); @@ -582,10 +608,7 @@ static inline void pgd_clear(pgd_t *pgdp) set_pgd(pgdp, __pgd(0)); } -static inline void pud_clear(pud_t *pudp) -{ - set_pud(pudp, __pud(0)); -} +#endif /* CONFIG_PGTABLE_LEVELS == 5 */ #endif /* CONFIG_PGTABLE_LEVELS == 4 */ diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index b060f962d581..93c49cf09b63 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -279,12 +279,18 @@ struct pv_mmu_ops { struct paravirt_callee_save pmd_val; struct paravirt_callee_save make_pmd; -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 struct paravirt_callee_save pud_val; struct paravirt_callee_save make_pud; - void (*set_pgd)(pgd_t *pudp, pgd_t pgdval); -#endif /* CONFIG_PGTABLE_LEVELS == 4 */ + void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); + +#if CONFIG_PGTABLE_LEVELS >= 5 +#error FIXME +#endif /* CONFIG_PGTABLE_LEVELS >= 5 */ + +#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ + #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ struct pv_lazy_ops lazy_mode; diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index b6d425999f99..2f585054c63c 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -121,10 +121,10 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) #endif /* CONFIG_X86_PAE */ #if CONFIG_PGTABLE_LEVELS > 3 -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) +static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) { paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); - set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); + set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud))); } static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) @@ -150,6 +150,37 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, ___pud_free_tlb(tlb, pud); } +#if CONFIG_PGTABLE_LEVELS > 4 +static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d) +{ + paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT); + set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d))); +} + +static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + gfp_t gfp = GFP_KERNEL_ACCOUNT; + + if (mm == &init_mm) + gfp &= ~__GFP_ACCOUNT; + return (p4d_t *)get_zeroed_page(gfp); +} + +static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d) +{ + BUG_ON((unsigned long)p4d & (PAGE_SIZE-1)); + free_page((unsigned long)p4d); +} + +extern void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d); + +static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d, + unsigned long address) +{ + ___p4d_free_tlb(tlb, p4d); +} + +#endif /* CONFIG_PGTABLE_LEVELS > 4 */ #endif /* CONFIG_PGTABLE_LEVELS > 3 */ #endif /* CONFIG_PGTABLE_LEVELS > 2 */ diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 18a6f5460461..bf51e6054577 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -53,11 +53,19 @@ extern struct mm_struct *pgd_page_get_mm(struct page *page); #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) -#ifndef __PAGETABLE_PUD_FOLDED +#ifndef __PAGETABLE_P4D_FOLDED #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) #define pgd_clear(pgd) native_pgd_clear(pgd) #endif +#ifndef set_p4d +# define set_p4d(p4dp, p4d) native_set_p4d(p4dp, p4d) +#endif + +#ifndef __PAGETABLE_PUD_FOLDED +#define p4d_clear(p4d) native_p4d_clear(p4d) +#endif + #ifndef set_pud # define set_pud(pudp, pud) native_set_pud(pudp, pud) #endif @@ -74,6 +82,11 @@ extern struct mm_struct *pgd_page_get_mm(struct page *page); #define pgd_val(x) native_pgd_val(x) #define __pgd(x) native_make_pgd(x) +#ifndef __PAGETABLE_P4D_FOLDED +#define p4d_val(x) native_p4d_val(x) +#define __p4d(x) native_make_p4d(x) +#endif + #ifndef __PAGETABLE_PUD_FOLDED #define pud_val(x) native_pud_val(x) #define __pud(x) native_make_pud(x) @@ -554,6 +567,7 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) #define pte_pgprot(x) __pgprot(pte_flags(x)) #define pmd_pgprot(x) __pgprot(pmd_flags(x)) #define pud_pgprot(x) __pgprot(pud_flags(x)) +#define p4d_pgprot(x) __pgprot(p4d_flags(x)) #define canon_pgprot(p) __pgprot(massage_pgprot(p)) @@ -792,12 +806,47 @@ static inline unsigned long pud_index(unsigned long address) return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); } +#if CONFIG_PGTABLE_LEVELS > 3 +static inline int p4d_none(p4d_t p4d) +{ + return (native_p4d_val(p4d) & ~(_PAGE_KNL_ERRATUM_MASK)) == 0; +} + +static inline int p4d_present(p4d_t p4d) +{ + return p4d_flags(p4d) & _PAGE_PRESENT; +} + +static inline unsigned long p4d_page_vaddr(p4d_t p4d) +{ + return (unsigned long)__va(p4d_val(p4d) & p4d_pfn_mask(p4d)); +} + +/* + * Currently stuck as a macro due to indirect forward reference to + * linux/mmzone.h's __section_mem_map_addr() definition: + */ +#define p4d_page(p4d) \ + pfn_to_page((p4d_val(p4d) & p4d_pfn_mask(p4d)) >> PAGE_SHIFT) + +/* Find an entry in the third-level page table.. */ +static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address) +{ + return (pud_t *)p4d_page_vaddr(*p4d) + pud_index(address); +} + +static inline int p4d_bad(p4d_t p4d) +{ + return (p4d_flags(p4d) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; +} +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ + static inline unsigned long p4d_index(unsigned long address) { return (address >> P4D_SHIFT) & (PTRS_PER_P4D - 1); } -#if CONFIG_PGTABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 4 static inline int pgd_present(pgd_t pgd) { return pgd_flags(pgd) & _PAGE_PRESENT; @@ -815,9 +864,9 @@ static inline unsigned long pgd_page_vaddr(pgd_t pgd) #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) /* to find an entry in a page-table-directory. */ -static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) +static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address) { - return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); + return (p4d_t *)pgd_page_vaddr(*pgd) + p4d_index(address); } static inline int pgd_bad(pgd_t pgd) @@ -835,7 +884,7 @@ static inline int pgd_none(pgd_t pgd) */ return !native_pgd_val(pgd); } -#endif /* CONFIG_PGTABLE_LEVELS > 3 */ +#endif /* CONFIG_PGTABLE_LEVELS > 4 */ #endif /* __ASSEMBLY__ */ diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 1a4bc71534d4..0593a1ae7573 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -41,9 +41,9 @@ extern void paging_init(void); struct mm_struct; +void set_pte_vaddr_p4d(p4d_t *p4d_page, unsigned long vaddr, pte_t new_pte); void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); - static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { @@ -121,6 +121,16 @@ static inline pud_t native_pudp_get_and_clear(pud_t *xp) #endif } +static inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d) +{ + *p4dp = p4d; +} + +static inline void native_p4d_clear(p4d_t *p4d) +{ + native_set_p4d(p4d, (p4d_t) { .pgd = native_make_pgd(0)}); +} + static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) { *pgdp = pgd; diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index df08535f774a..4930afe9df0a 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -277,11 +277,11 @@ static inline pgdval_t pgd_flags(pgd_t pgd) #error FIXME #else -#include <asm-generic/5level-fixup.h> +#include <asm-generic/pgtable-nop4d.h> static inline p4dval_t native_p4d_val(p4d_t p4d) { - return native_pgd_val(p4d); + return native_pgd_val(p4d.pgd); } #endif @@ -298,12 +298,11 @@ static inline pudval_t native_pud_val(pud_t pud) return pud.pud; } #else -#define __ARCH_USE_5LEVEL_HACK #include <asm-generic/pgtable-nopud.h> static inline pudval_t native_pud_val(pud_t pud) { - return native_pgd_val(pud.pgd); + return native_pgd_val(pud.p4d.pgd); } #endif @@ -320,12 +319,11 @@ static inline pmdval_t native_pmd_val(pmd_t pmd) return pmd.pmd; } #else -#define __ARCH_USE_5LEVEL_HACK #include <asm-generic/pgtable-nopmd.h> static inline pmdval_t native_pmd_val(pmd_t pmd) { - return native_pgd_val(pmd.pud.pgd); + return native_pgd_val(pmd.pud.p4d.pgd); } #endif diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index 33cbd3db97b9..bf2ca56fba11 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -279,13 +279,17 @@ static inline pte_t __pte_ma(pteval_t x) #define pmd_val_ma(v) ((v).pmd) #ifdef __PAGETABLE_PUD_FOLDED -#define pud_val_ma(v) ((v).pgd.pgd) +#define pud_val_ma(v) ((v).p4d.pgd.pgd) #else #define pud_val_ma(v) ((v).pud) #endif #define __pmd_ma(x) ((pmd_t) { (x) } ) -#define pgd_val_ma(x) ((x).pgd) +#ifdef __PAGETABLE_P4D_FOLDED +#define p4d_val_ma(x) ((x).pgd.pgd) +#else +#define p4d_val_ma(x) ((x).p4d) +#endif void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid); diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 4797e87b0fb6..110daf22f5c7 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -430,12 +430,16 @@ struct pv_mmu_ops pv_mmu_ops __ro_after_init = { .pmd_val = PTE_IDENT, .make_pmd = PTE_IDENT, -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 .pud_val = PTE_IDENT, .make_pud = PTE_IDENT, - .set_pgd = native_set_pgd, -#endif + .set_p4d = native_set_p4d, + +#if CONFIG_PGTABLE_LEVELS >= 5 +#error FIXME +#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ +#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ .pte_val = PTE_IDENT, diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 15173d37f399..7bdda6f1d135 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -97,28 +97,38 @@ void sync_global_pgds(unsigned long start, unsigned long end) unsigned long address; for (address = start; address <= end; address += PGDIR_SIZE) { - const pgd_t *pgd_ref = pgd_offset_k(address); + pgd_t *pgd_ref = pgd_offset_k(address); + const p4d_t *p4d_ref; struct page *page; - if (pgd_none(*pgd_ref)) + /* + * With folded p4d, pgd_none() is always false, we need to + * handle synchonization on p4d level. + */ + BUILD_BUG_ON(pgd_none(*pgd_ref)); + p4d_ref = p4d_offset(pgd_ref, address); + + if (p4d_none(*p4d_ref)) continue; spin_lock(&pgd_lock); list_for_each_entry(page, &pgd_list, lru) { pgd_t *pgd; + p4d_t *p4d; spinlock_t *pgt_lock; pgd = (pgd_t *)page_address(page) + pgd_index(address); + p4d = p4d_offset(pgd, address); /* the pgt_lock only for Xen */ pgt_lock = &pgd_page_get_mm(page)->page_table_lock; spin_lock(pgt_lock); - if (!pgd_none(*pgd_ref) && !pgd_none(*pgd)) - BUG_ON(pgd_page_vaddr(*pgd) - != pgd_page_vaddr(*pgd_ref)); + if (!p4d_none(*p4d_ref) && !p4d_none(*p4d)) + BUG_ON(p4d_page_vaddr(*p4d) + != p4d_page_vaddr(*p4d_ref)); - if (pgd_none(*pgd)) - set_pgd(pgd, *pgd_ref); + if (p4d_none(*p4d)) + set_p4d(p4d, *p4d_ref); spin_unlock(pgt_lock); } @@ -149,16 +159,28 @@ static __ref void *spp_getpage(void) return ptr; } -static pud_t *fill_pud(pgd_t *pgd, unsigned long vaddr) +static p4d_t *fill_p4d(pgd_t *pgd, unsigned long vaddr) { if (pgd_none(*pgd)) { - pud_t *pud = (pud_t *)spp_getpage(); - pgd_populate(&init_mm, pgd, pud); - if (pud != pud_offset(pgd, 0)) + p4d_t *p4d = (p4d_t *)spp_getpage(); + pgd_populate(&init_mm, pgd, p4d); + if (p4d != p4d_offset(pgd, 0)) printk(KERN_ERR "PAGETABLE BUG #00! %p <-> %p\n", - pud, pud_offset(pgd, 0)); + p4d, p4d_offset(pgd, 0)); + } + return p4d_offset(pgd, vaddr); +} + +static pud_t *fill_pud(p4d_t *p4d, unsigned long vaddr) +{ + if (p4d_none(*p4d)) { + pud_t *pud = (pud_t *)spp_getpage(); + p4d_populate(&init_mm, p4d, pud); + if (pud != pud_offset(p4d, 0)) + printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n", + pud, pud_offset(p4d, 0)); } - return pud_offset(pgd, vaddr); + return pud_offset(p4d, vaddr); } static pmd_t *fill_pmd(pud_t *pud, unsigned long vaddr) @@ -167,7 +189,7 @@ static pmd_t *fill_pmd(pud_t *pud, unsigned long vaddr) pmd_t *pmd = (pmd_t *) spp_getpage(); pud_populate(&init_mm, pud, pmd); if (pmd != pmd_offset(pud, 0)) - printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n", + printk(KERN_ERR "PAGETABLE BUG #02! %p <-> %p\n", pmd, pmd_offset(pud, 0)); } return pmd_offset(pud, vaddr); @@ -179,20 +201,15 @@ static pte_t *fill_pte(pmd_t *pmd, unsigned long vaddr) pte_t *pte = (pte_t *) spp_getpage(); pmd_populate_kernel(&init_mm, pmd, pte); if (pte != pte_offset_kernel(pmd, 0)) - printk(KERN_ERR "PAGETABLE BUG #02!\n"); + printk(KERN_ERR "PAGETABLE BUG #03!\n"); } return pte_offset_kernel(pmd, vaddr); } -void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte) +static void __set_pte_vaddr(pud_t *pud, unsigned long vaddr, pte_t new_pte) { - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - pud = pud_page + pud_index(vaddr); - pmd = fill_pmd(pud, vaddr); - pte = fill_pte(pmd, vaddr); + pmd_t *pmd = fill_pmd(pud, vaddr); + pte_t *pte = fill_pte(pmd, vaddr); set_pte(pte, new_pte); @@ -203,10 +220,25 @@ void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte) __flush_tlb_one(vaddr); } +void set_pte_vaddr_p4d(p4d_t *p4d_page, unsigned long vaddr, pte_t new_pte) +{ + p4d_t *p4d = p4d_page + p4d_index(vaddr); + pud_t *pud = fill_pud(p4d, vaddr); + + __set_pte_vaddr(pud, vaddr, new_pte); +} + +void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte) +{ + pud_t *pud = pud_page + pud_index(vaddr); + + __set_pte_vaddr(pud, vaddr, new_pte); +} + void set_pte_vaddr(unsigned long vaddr, pte_t pteval) { pgd_t *pgd; - pud_t *pud_page; + p4d_t *p4d_page; pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(pteval)); @@ -216,17 +248,20 @@ void set_pte_vaddr(unsigned long vaddr, pte_t pteval) "PGD FIXMAP MISSING, it should be setup in head.S!\n"); return; } - pud_page = (pud_t*)pgd_page_vaddr(*pgd); - set_pte_vaddr_pud(pud_page, vaddr, pteval); + + p4d_page = p4d_offset(pgd, 0); + set_pte_vaddr_p4d(p4d_page, vaddr, pteval); } pmd_t * __init populate_extra_pmd(unsigned long vaddr) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pgd = pgd_offset_k(vaddr); - pud = fill_pud(pgd, vaddr); + p4d = fill_p4d(pgd, vaddr); + pud = fill_pud(p4d, vaddr); return fill_pmd(pud, vaddr); } @@ -245,6 +280,7 @@ static void __init __init_extra_mapping(unsigned long phys, unsigned long size, enum page_cache_mode cache) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pgprot_t prot; @@ -255,11 +291,17 @@ static void __init __init_extra_mapping(unsigned long phys, unsigned long size, for (; size; phys += PMD_SIZE, size -= PMD_SIZE) { pgd = pgd_offset_k((unsigned long)__va(phys)); if (pgd_none(*pgd)) { + p4d = (p4d_t *) spp_getpage(); + set_pgd(pgd, __pgd(__pa(p4d) | _KERNPG_TABLE | + _PAGE_USER)); + } + p4d = p4d_offset(pgd, (unsigned long)__va(phys)); + if (p4d_none(*p4d)) { pud = (pud_t *) spp_getpage(); - set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE | + set_p4d(p4d, __p4d(__pa(pud) | _KERNPG_TABLE | _PAGE_USER)); } - pud = pud_offset(pgd, (unsigned long)__va(phys)); + pud = pud_offset(p4d, (unsigned long)__va(phys)); if (pud_none(*pud)) { pmd = (pmd_t *) spp_getpage(); set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | @@ -563,12 +605,15 @@ kernel_physical_mapping_init(unsigned long paddr_start, for (; vaddr < vaddr_end; vaddr = vaddr_next) { pgd_t *pgd = pgd_offset_k(vaddr); + p4d_t *p4d; pud_t *pud; vaddr_next = (vaddr & PGDIR_MASK) + PGDIR_SIZE; - if (pgd_val(*pgd)) { - pud = (pud_t *)pgd_page_vaddr(*pgd); + BUILD_BUG_ON(pgd_none(*pgd)); + p4d = p4d_offset(pgd, vaddr); + if (p4d_val(*p4d)) { + pud = (pud_t *)p4d_page_vaddr(*p4d); paddr_last = phys_pud_init(pud, __pa(vaddr), __pa(vaddr_end), page_size_mask); @@ -580,7 +625,7 @@ kernel_physical_mapping_init(unsigned long paddr_start, page_size_mask); spin_lock(&init_mm.page_table_lock); - pgd_populate(&init_mm, pgd, pud); + p4d_populate(&init_mm, p4d, pud); spin_unlock(&init_mm.page_table_lock); pgd_changed = true; } @@ -726,6 +771,24 @@ static void __meminit free_pmd_table(pmd_t *pmd_start, pud_t *pud) spin_unlock(&init_mm.page_table_lock); } +static void __meminit free_pud_table(pud_t *pud_start, p4d_t *p4d) +{ + pud_t *pud; + int i; + + for (i = 0; i < PTRS_PER_PUD; i++) { + pud = pud_start + i; + if (!pud_none(*pud)) + return; + } + + /* free a pud talbe */ + free_pagetable(p4d_page(*p4d), 0); + spin_lock(&init_mm.page_table_lock); + p4d_clear(p4d); + spin_unlock(&init_mm.page_table_lock); +} + static void __meminit remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end, bool direct) @@ -908,6 +971,32 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end, update_page_count(PG_LEVEL_1G, -pages); } +static void __meminit +remove_p4d_table(p4d_t *p4d_start, unsigned long addr, unsigned long end, + bool direct) +{ + unsigned long next, pages = 0; + pud_t *pud_base; + p4d_t *p4d; + + p4d = p4d_start + p4d_index(addr); + for (; addr < end; addr = next, p4d++) { + next = p4d_addr_end(addr, end); + + if (!p4d_present(*p4d)) + continue; + + BUILD_BUG_ON(p4d_large(*p4d)); + + pud_base = (pud_t *)p4d_page_vaddr(*p4d); + remove_pud_table(pud_base, addr, next, direct); + free_pud_table(pud_base, p4d); + } + + if (direct) + update_page_count(PG_LEVEL_512G, -pages); +} + /* start and end are both virtual address. */ static void __meminit remove_pagetable(unsigned long start, unsigned long end, bool direct) @@ -915,7 +1004,7 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct) unsigned long next; unsigned long addr; pgd_t *pgd; - pud_t *pud; + p4d_t *p4d; for (addr = start; addr < end; addr = next) { next = pgd_addr_end(addr, end); @@ -924,8 +1013,8 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct) if (!pgd_present(*pgd)) continue; - pud = (pud_t *)pgd_page_vaddr(*pgd); - remove_pud_table(pud, addr, next, direct); + p4d = (p4d_t *)pgd_page_vaddr(*pgd); + remove_p4d_table(p4d, addr, next, direct); } flush_tlb_all(); @@ -1090,6 +1179,7 @@ int kern_addr_valid(unsigned long addr) { unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT; pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte; @@ -1101,7 +1191,11 @@ int kern_addr_valid(unsigned long addr) if (pgd_none(*pgd)) return 0; - pud = pud_offset(pgd, addr); + p4d = p4d_offset(pgd, addr); + if (p4d_none(*p4d)) + return 0; + + pud = pud_offset(p4d, addr); if (pud_none(*pud)) return 0; @@ -1158,6 +1252,7 @@ static int __meminit vmemmap_populate_hugepages(unsigned long start, unsigned long addr; unsigned long next; pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; @@ -1168,7 +1263,11 @@ static int __meminit vmemmap_populate_hugepages(unsigned long start, if (!pgd) return -ENOMEM; - pud = vmemmap_pud_populate(pgd, addr, node); + p4d = vmemmap_p4d_populate(pgd, addr, node); + if (!p4d) + return -ENOMEM; + + pud = vmemmap_pud_populate(p4d, addr, node); if (!pud) return -ENOMEM; @@ -1236,6 +1335,7 @@ void register_page_bootmem_memmap(unsigned long section_nr, unsigned long end = (unsigned long)(start_page + size); unsigned long next; pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; unsigned int nr_pages; @@ -1251,7 +1351,14 @@ void register_page_bootmem_memmap(unsigned long section_nr, } get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO); - pud = pud_offset(pgd, addr); + p4d = p4d_offset(pgd, addr); + if (p4d_none(*p4d)) { + next = (addr + PAGE_SIZE) & PAGE_MASK; + continue; + } + get_page_bootmem(section_nr, p4d_page(*p4d), MIX_SECTION_INFO); + + pud = pud_offset(p4d, addr); if (pud_none(*pud)) { next = (addr + PAGE_SIZE) & PAGE_MASK; continue; diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index e6adebbb5f8d..4d4b7bc48f5d 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -535,40 +535,41 @@ static pgd_t *xen_get_user_pgd(pgd_t *pgd) return user_ptr; } -static void __xen_set_pgd_hyper(pgd_t *ptr, pgd_t val) +static void __xen_set_p4d_hyper(p4d_t *ptr, p4d_t val) { struct mmu_update u; u.ptr = virt_to_machine(ptr).maddr; - u.val = pgd_val_ma(val); + u.val = p4d_val_ma(val); xen_extend_mmu_update(&u); } /* - * Raw hypercall-based set_pgd, intended for in early boot before + * Raw hypercall-based set_p4d, intended for in early boot before * there's a page structure. This implies: * 1. The only existing pagetable is the kernel's * 2. It is always pinned * 3. It has no user pagetable attached to it */ -static void __init xen_set_pgd_hyper(pgd_t *ptr, pgd_t val) +static void __init xen_set_p4d_hyper(p4d_t *ptr, p4d_t val) { preempt_disable(); xen_mc_batch(); - __xen_set_pgd_hyper(ptr, val); + __xen_set_p4d_hyper(ptr, val); xen_mc_issue(PARAVIRT_LAZY_MMU); preempt_enable(); } -static void xen_set_pgd(pgd_t *ptr, pgd_t val) +static void xen_set_p4d(p4d_t *ptr, p4d_t val) { - pgd_t *user_ptr = xen_get_user_pgd(ptr); + pgd_t *user_ptr = xen_get_user_pgd((pgd_t *)ptr); + pgd_t pgd_val; - trace_xen_mmu_set_pgd(ptr, user_ptr, val); + trace_xen_mmu_set_p4d(ptr, (p4d_t *)user_ptr, val); /* If page is not pinned, we can just update the entry directly */ @@ -576,7 +577,8 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val) *ptr = val; if (user_ptr) { WARN_ON(xen_page_pinned(user_ptr)); - *user_ptr = val; + pgd_val.pgd = p4d_val_ma(val); + *user_ptr = pgd_val; } return; } @@ -585,9 +587,9 @@ static void xen_set_pgd(pgd_t *ptr, pgd_t val) user updates together. */ xen_mc_batch(); - __xen_set_pgd_hyper(ptr, val); + __xen_set_p4d_hyper(ptr, val); if (user_ptr) - __xen_set_pgd_hyper(user_ptr, val); + __xen_set_p4d_hyper((p4d_t *)user_ptr, val); xen_mc_issue(PARAVIRT_LAZY_MMU); } @@ -1591,7 +1593,6 @@ static int xen_pgd_alloc(struct mm_struct *mm) BUG_ON(PagePinned(virt_to_page(xen_get_user_pgd(pgd)))); } #endif - return ret; } @@ -1783,7 +1784,7 @@ static void xen_release_pmd(unsigned long pfn) xen_release_ptpage(pfn, PT_PMD); } -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 static void xen_alloc_pud(struct mm_struct *mm, unsigned long pfn) { xen_alloc_ptpage(mm, pfn, PT_PUD); @@ -2124,21 +2125,27 @@ static phys_addr_t __init xen_early_virt_to_phys(unsigned long vaddr) */ void __init xen_relocate_p2m(void) { - phys_addr_t size, new_area, pt_phys, pmd_phys, pud_phys; + phys_addr_t size, new_area, pt_phys, pmd_phys, pud_phys, p4d_phys; unsigned long p2m_pfn, p2m_pfn_end, n_frames, pfn, pfn_end; - int n_pte, n_pt, n_pmd, n_pud, idx_pte, idx_pt, idx_pmd, idx_pud; + int n_pte, n_pt, n_pmd, n_pud, n_p4d, idx_pte, idx_pt, idx_pmd, idx_pud, idx_p4d; pte_t *pt; pmd_t *pmd; pud_t *pud; + p4d_t *p4d = NULL; pgd_t *pgd; unsigned long *new_p2m; + int save_pud; size = PAGE_ALIGN(xen_start_info->nr_pages * sizeof(unsigned long)); n_pte = roundup(size, PAGE_SIZE) >> PAGE_SHIFT; n_pt = roundup(size, PMD_SIZE) >> PMD_SHIFT; n_pmd = roundup(size, PUD_SIZE) >> PUD_SHIFT; - n_pud = roundup(size, PGDIR_SIZE) >> PGDIR_SHIFT; - n_frames = n_pte + n_pt + n_pmd + n_pud; + n_pud = roundup(size, P4D_SIZE) >> P4D_SHIFT; + if (PTRS_PER_P4D > 1) + n_p4d = roundup(size, PGDIR_SIZE) >> PGDIR_SHIFT; + else + n_p4d = 0; + n_frames = n_pte + n_pt + n_pmd + n_pud + n_p4d; new_area = xen_find_free_area(PFN_PHYS(n_frames)); if (!new_area) { @@ -2154,55 +2161,76 @@ void __init xen_relocate_p2m(void) * To avoid any possible virtual address collision, just use * 2 * PUD_SIZE for the new area. */ - pud_phys = new_area; + p4d_phys = new_area; + pud_phys = p4d_phys + PFN_PHYS(n_p4d); pmd_phys = pud_phys + PFN_PHYS(n_pud); pt_phys = pmd_phys + PFN_PHYS(n_pmd); p2m_pfn = PFN_DOWN(pt_phys) + n_pt; pgd = __va(read_cr3()); new_p2m = (unsigned long *)(2 * PGDIR_SIZE); - for (idx_pud = 0; idx_pud < n_pud; idx_pud++) { - pud = early_memremap(pud_phys, PAGE_SIZE); - clear_page(pud); - for (idx_pmd = 0; idx_pmd < min(n_pmd, PTRS_PER_PUD); - idx_pmd++) { - pmd = early_memremap(pmd_phys, PAGE_SIZE); - clear_page(pmd); - for (idx_pt = 0; idx_pt < min(n_pt, PTRS_PER_PMD); - idx_pt++) { - pt = early_memremap(pt_phys, PAGE_SIZE); - clear_page(pt); - for (idx_pte = 0; - idx_pte < min(n_pte, PTRS_PER_PTE); - idx_pte++) { - set_pte(pt + idx_pte, - pfn_pte(p2m_pfn, PAGE_KERNEL)); - p2m_pfn++; + idx_p4d = 0; + save_pud = n_pud; + do { + if (n_p4d > 0) { + p4d = early_memremap(p4d_phys, PAGE_SIZE); + clear_page(p4d); + n_pud = min(save_pud, PTRS_PER_P4D); + } + for (idx_pud = 0; idx_pud < n_pud; idx_pud++) { + pud = early_memremap(pud_phys, PAGE_SIZE); + clear_page(pud); + for (idx_pmd = 0; idx_pmd < min(n_pmd, PTRS_PER_PUD); + idx_pmd++) { + pmd = early_memremap(pmd_phys, PAGE_SIZE); + clear_page(pmd); + for (idx_pt = 0; idx_pt < min(n_pt, PTRS_PER_PMD); + idx_pt++) { + pt = early_memremap(pt_phys, PAGE_SIZE); + clear_page(pt); + for (idx_pte = 0; + idx_pte < min(n_pte, PTRS_PER_PTE); + idx_pte++) { + set_pte(pt + idx_pte, + pfn_pte(p2m_pfn, PAGE_KERNEL)); + p2m_pfn++; + } + n_pte -= PTRS_PER_PTE; + early_memunmap(pt, PAGE_SIZE); + make_lowmem_page_readonly(__va(pt_phys)); + pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, + PFN_DOWN(pt_phys)); + set_pmd(pmd + idx_pt, + __pmd(_PAGE_TABLE | pt_phys)); + pt_phys += PAGE_SIZE; } - n_pte -= PTRS_PER_PTE; - early_memunmap(pt, PAGE_SIZE); - make_lowmem_page_readonly(__va(pt_phys)); - pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, - PFN_DOWN(pt_phys)); - set_pmd(pmd + idx_pt, - __pmd(_PAGE_TABLE | pt_phys)); - pt_phys += PAGE_SIZE; + n_pt -= PTRS_PER_PMD; + early_memunmap(pmd, PAGE_SIZE); + make_lowmem_page_readonly(__va(pmd_phys)); + pin_pagetable_pfn(MMUEXT_PIN_L2_TABLE, + PFN_DOWN(pmd_phys)); + set_pud(pud + idx_pmd, __pud(_PAGE_TABLE | pmd_phys)); + pmd_phys += PAGE_SIZE; } - n_pt -= PTRS_PER_PMD; - early_memunmap(pmd, PAGE_SIZE); - make_lowmem_page_readonly(__va(pmd_phys)); - pin_pagetable_pfn(MMUEXT_PIN_L2_TABLE, - PFN_DOWN(pmd_phys)); - set_pud(pud + idx_pmd, __pud(_PAGE_TABLE | pmd_phys)); - pmd_phys += PAGE_SIZE; + n_pmd -= PTRS_PER_PUD; + early_memunmap(pud, PAGE_SIZE); + make_lowmem_page_readonly(__va(pud_phys)); + pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(pud_phys)); + if (n_p4d > 0) + set_p4d(p4d + idx_pud, __p4d(_PAGE_TABLE | pud_phys)); + else + set_pgd(pgd + 2 + idx_pud, __pgd(_PAGE_TABLE | pud_phys)); + pud_phys += PAGE_SIZE; } - n_pmd -= PTRS_PER_PUD; - early_memunmap(pud, PAGE_SIZE); - make_lowmem_page_readonly(__va(pud_phys)); - pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(pud_phys)); - set_pgd(pgd + 2 + idx_pud, __pgd(_PAGE_TABLE | pud_phys)); - pud_phys += PAGE_SIZE; - } + if (n_p4d > 0) { + save_pud -= PTRS_PER_P4D; + early_memunmap(p4d, PAGE_SIZE); + make_lowmem_page_readonly(__va(p4d_phys)); + pin_pagetable_pfn(MMUEXT_PIN_L4_TABLE, PFN_DOWN(p4d_phys)); + set_pgd(pgd + 2 + idx_p4d, __pgd(_PAGE_TABLE | p4d_phys)); + p4d_phys += PAGE_SIZE; + } + } while (++idx_p4d < n_p4d); /* Now copy the old p2m info to the new area. */ memcpy(new_p2m, xen_p2m_addr, size); @@ -2432,8 +2460,8 @@ static void __init xen_post_allocator_init(void) pv_mmu_ops.set_pte = xen_set_pte; pv_mmu_ops.set_pmd = xen_set_pmd; pv_mmu_ops.set_pud = xen_set_pud; -#if CONFIG_PGTABLE_LEVELS == 4 - pv_mmu_ops.set_pgd = xen_set_pgd; +#if CONFIG_PGTABLE_LEVELS >= 4 + pv_mmu_ops.set_p4d = xen_set_p4d; #endif /* This will work as long as patching hasn't happened yet @@ -2442,7 +2470,7 @@ static void __init xen_post_allocator_init(void) pv_mmu_ops.alloc_pmd = xen_alloc_pmd; pv_mmu_ops.release_pte = xen_release_pte; pv_mmu_ops.release_pmd = xen_release_pmd; -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 pv_mmu_ops.alloc_pud = xen_alloc_pud; pv_mmu_ops.release_pud = xen_release_pud; #endif @@ -2508,10 +2536,10 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = { .make_pmd = PV_CALLEE_SAVE(xen_make_pmd), .pmd_val = PV_CALLEE_SAVE(xen_pmd_val), -#if CONFIG_PGTABLE_LEVELS == 4 +#if CONFIG_PGTABLE_LEVELS >= 4 .pud_val = PV_CALLEE_SAVE(xen_pud_val), .make_pud = PV_CALLEE_SAVE(xen_make_pud), - .set_pgd = xen_set_pgd_hyper, + .set_p4d = xen_set_p4d_hyper, .alloc_pud = xen_alloc_pmd_init, .release_pud = xen_release_pmd_init, diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h index bce990f5a35d..31acce9019a6 100644 --- a/include/trace/events/xen.h +++ b/include/trace/events/xen.h @@ -241,21 +241,21 @@ TRACE_EVENT(xen_mmu_set_pud, (int)sizeof(pudval_t) * 2, (unsigned long long)__entry->pudval) ); -TRACE_EVENT(xen_mmu_set_pgd, - TP_PROTO(pgd_t *pgdp, pgd_t *user_pgdp, pgd_t pgdval), - TP_ARGS(pgdp, user_pgdp, pgdval), +TRACE_EVENT(xen_mmu_set_p4d, + TP_PROTO(p4d_t *p4dp, p4d_t *user_p4dp, p4d_t p4dval), + TP_ARGS(p4dp, user_p4dp, p4dval), TP_STRUCT__entry( - __field(pgd_t *, pgdp) - __field(pgd_t *, user_pgdp) - __field(pgdval_t, pgdval) - ), - TP_fast_assign(__entry->pgdp = pgdp; - __entry->user_pgdp = user_pgdp; - __entry->pgdval = pgdval.pgd), - TP_printk("pgdp %p user_pgdp %p pgdval %0*llx (raw %0*llx)", - __entry->pgdp, __entry->user_pgdp, - (int)sizeof(pgdval_t) * 2, (unsigned long long)pgd_val(native_make_pgd(__entry->pgdval)), - (int)sizeof(pgdval_t) * 2, (unsigned long long)__entry->pgdval) + __field(p4d_t *, p4dp) + __field(p4d_t *, user_p4dp) + __field(p4dval_t, p4dval) + ), + TP_fast_assign(__entry->p4dp = p4dp; + __entry->user_p4dp = user_p4dp; + __entry->p4dval = p4d_val(p4dval)), + TP_printk("p4dp %p user_p4dp %p p4dval %0*llx (raw %0*llx)", + __entry->p4dp, __entry->user_p4dp, + (int)sizeof(p4dval_t) * 2, (unsigned long long)pgd_val(native_make_pgd(__entry->p4dval)), + (int)sizeof(p4dval_t) * 2, (unsigned long long)__entry->p4dval) ); TRACE_EVENT(xen_mmu_pud_clear, |