Commit-ID: 335437fbf7d3a630d775f06c9ee37d60919561d8 Gitweb: http://git.kernel.org/tip/335437fbf7d3a630d775f06c9ee37d60919561d8 Author: Kirill A. Shutemov <kirill.shute...@linux.intel.com> AuthorDate: Thu, 30 Mar 2017 11:07:28 +0300 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 4 Apr 2017 08:22:34 +0200
x86/paravirt: Add 5-level support to the paravirt code Add operations to allocate/release p4ds. Xen requires more work. We will need to come back to it. Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Dave Hansen <dave.han...@intel.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: linux-a...@vger.kernel.org Cc: linux...@kvack.org Link: http://lkml.kernel.org/r/20170330080731.65421-5-kirill.shute...@linux.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/paravirt.h | 37 ++++++++++++++++++++++++----------- arch/x86/include/asm/paravirt_types.h | 7 ++++++- arch/x86/include/asm/pgalloc.h | 2 ++ arch/x86/kernel/paravirt.c | 9 +++++++-- 4 files changed, 41 insertions(+), 14 deletions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 158d877..55fa56f 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -357,6 +357,16 @@ static inline void paravirt_release_pud(unsigned long pfn) PVOP_VCALL1(pv_mmu_ops.release_pud, pfn); } +static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) +{ + PVOP_VCALL2(pv_mmu_ops.alloc_p4d, mm, pfn); +} + +static inline void paravirt_release_p4d(unsigned long pfn) +{ + PVOP_VCALL1(pv_mmu_ops.release_p4d, pfn); +} + static inline void pte_update(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { @@ -582,25 +592,25 @@ static inline void set_p4d(p4d_t *p4dp, p4d_t p4d) val); } -static inline void p4d_clear(p4d_t *p4dp) +#if CONFIG_PGTABLE_LEVELS >= 5 + +static inline p4d_t __p4d(p4dval_t val) { - set_p4d(p4dp, __p4d(0)); -} + p4dval_t ret = PVOP_CALLEE1(p4dval_t, pv_mmu_ops.make_p4d, val); -#if CONFIG_PGTABLE_LEVELS >= 5 + return (p4d_t) { ret }; +} -#error FIXME +static inline p4dval_t p4d_val(p4d_t p4d) +{ + return PVOP_CALLEE1(p4dval_t, pv_mmu_ops.p4d_val, p4d.p4d); +} static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) { pgdval_t val = native_pgd_val(pgd); - if (sizeof(pgdval_t) > sizeof(long)) - PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp, - val, (u64)val >> 32); - else - PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, - val); + PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, val); } static inline void pgd_clear(pgd_t *pgdp) @@ -610,6 +620,11 @@ static inline void pgd_clear(pgd_t *pgdp) #endif /* CONFIG_PGTABLE_LEVELS == 5 */ +static inline void p4d_clear(p4d_t *p4dp) +{ + set_p4d(p4dp, __p4d(0)); +} + #endif /* CONFIG_PGTABLE_LEVELS == 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 93c49cf..7465d6f 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -238,9 +238,11 @@ struct pv_mmu_ops { void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); + void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); void (*release_pte)(unsigned long pfn); void (*release_pmd)(unsigned long pfn); void (*release_pud)(unsigned long pfn); + void (*release_p4d)(unsigned long pfn); /* Pagetable manipulation functions */ void (*set_pte)(pte_t *ptep, pte_t pteval); @@ -286,7 +288,10 @@ struct pv_mmu_ops { void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); #if CONFIG_PGTABLE_LEVELS >= 5 -#error FIXME + struct paravirt_callee_save p4d_val; + struct paravirt_callee_save make_p4d; + + void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ #endif /* CONFIG_PGTABLE_LEVELS >= 4 */ diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index 2f58505..b2d0cd8 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -17,9 +17,11 @@ static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) { static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count) {} static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {} +static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) {} static inline void paravirt_release_pte(unsigned long pfn) {} static inline void paravirt_release_pmd(unsigned long pfn) {} static inline void paravirt_release_pud(unsigned long pfn) {} +static inline void paravirt_release_p4d(unsigned long pfn) {} #endif /* diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 110daf2..3586996 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -405,9 +405,11 @@ struct pv_mmu_ops pv_mmu_ops __ro_after_init = { .alloc_pte = paravirt_nop, .alloc_pmd = paravirt_nop, .alloc_pud = paravirt_nop, + .alloc_p4d = paravirt_nop, .release_pte = paravirt_nop, .release_pmd = paravirt_nop, .release_pud = paravirt_nop, + .release_p4d = paravirt_nop, .set_pte = native_set_pte, .set_pte_at = native_set_pte_at, @@ -437,8 +439,11 @@ struct pv_mmu_ops pv_mmu_ops __ro_after_init = { .set_p4d = native_set_p4d, #if CONFIG_PGTABLE_LEVELS >= 5 -#error FIXME -#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ + .p4d_val = PTE_IDENT, + .make_p4d = PTE_IDENT, + + .set_pgd = native_set_pgd, +#endif /* CONFIG_PGTABLE_LEVELS >= 5 */ #endif /* CONFIG_PGTABLE_LEVELS >= 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */
