From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id C633A6B039D for ; Mon, 6 Mar 2017 08:54:23 -0500 (EST) Received: by mail-pf0-f198.google.com with SMTP id j5so199692541pfb.3 for ; Mon, 06 Mar 2017 05:54:23 -0800 (PST) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTPS id z190si5742303pfb.188.2017.03.06.05.54.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 Mar 2017 05:54:22 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCHv4 25/33] x86/dump_pagetables: support 5-level paging Date: Mon, 6 Mar 2017 16:53:49 +0300 Message-Id: <20170306135357.3124-26-kirill.shutemov@linux.intel.com> In-Reply-To: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> References: <20170306135357.3124-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , Arnd Bergmann , "H. Peter Anvin" Cc: Andi Kleen , Dave Hansen , Andy Lutomirski , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Simple extension to support one more page table level. Signed-off-by: Kirill A. Shutemov --- arch/x86/mm/dump_pagetables.c | 49 ++++++++++++++++++++++++++++++++++++------- 1 file changed, 42 insertions(+), 7 deletions(-) diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 58b5bee7ea27..0effac6989cd 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -110,7 +110,8 @@ static struct addr_marker address_markers[] = { #define PTE_LEVEL_MULT (PAGE_SIZE) #define PMD_LEVEL_MULT (PTRS_PER_PTE * PTE_LEVEL_MULT) #define PUD_LEVEL_MULT (PTRS_PER_PMD * PMD_LEVEL_MULT) -#define PGD_LEVEL_MULT (PTRS_PER_PUD * PUD_LEVEL_MULT) +#define P4D_LEVEL_MULT (PTRS_PER_PUD * PUD_LEVEL_MULT) +#define PGD_LEVEL_MULT (PTRS_PER_PUD * P4D_LEVEL_MULT) #define pt_dump_seq_printf(m, to_dmesg, fmt, args...) \ ({ \ @@ -347,7 +348,7 @@ static bool pud_already_checked(pud_t *prev_pud, pud_t *pud, bool checkwx) return checkwx && prev_pud && (pud_val(*prev_pud) == pud_val(*pud)); } -static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr, +static void walk_pud_level(struct seq_file *m, struct pg_state *st, p4d_t addr, unsigned long P) { int i; @@ -355,7 +356,7 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr, pgprotval_t prot; pud_t *prev_pud = NULL; - start = (pud_t *) pgd_page_vaddr(addr); + start = (pud_t *) p4d_page_vaddr(addr); for (i = 0; i < PTRS_PER_PUD; i++) { st->current_address = normalize_addr(P + i * PUD_LEVEL_MULT); @@ -377,9 +378,43 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr, } #else -#define walk_pud_level(m,s,a,p) walk_pmd_level(m,s,__pud(pgd_val(a)),p) -#define pgd_large(a) pud_large(__pud(pgd_val(a))) -#define pgd_none(a) pud_none(__pud(pgd_val(a))) +#define walk_pud_level(m,s,a,p) walk_pmd_level(m,s,__pud(p4d_val(a)),p) +#define p4d_large(a) pud_large(__pud(p4d_val(a))) +#define p4d_none(a) pud_none(__pud(p4d_val(a))) +#endif + +#if PTRS_PER_P4D > 1 + +static void walk_p4d_level(struct seq_file *m, struct pg_state *st, pgd_t addr, + unsigned long P) +{ + int i; + p4d_t *start; + pgprotval_t prot; + + start = (p4d_t *) pgd_page_vaddr(addr); + + for (i = 0; i < PTRS_PER_P4D; i++) { + st->current_address = normalize_addr(P + i * P4D_LEVEL_MULT); + if (!p4d_none(*start)) { + if (p4d_large(*start) || !p4d_present(*start)) { + prot = p4d_flags(*start); + note_page(m, st, __pgprot(prot), 2); + } else { + walk_pud_level(m, st, *start, + P + i * P4D_LEVEL_MULT); + } + } else + note_page(m, st, __pgprot(0), 2); + + start++; + } +} + +#else +#define walk_p4d_level(m,s,a,p) walk_pud_level(m,s,__p4d(pgd_val(a)),p) +#define pgd_large(a) p4d_large(__p4d(pgd_val(a))) +#define pgd_none(a) p4d_none(__p4d(pgd_val(a))) #endif static inline bool is_hypervisor_range(int idx) @@ -424,7 +459,7 @@ static void ptdump_walk_pgd_level_core(struct seq_file *m, pgd_t *pgd, prot = pgd_flags(*start); note_page(m, &st, __pgprot(prot), 1); } else { - walk_pud_level(m, &st, *start, + walk_p4d_level(m, &st, *start, i * PGD_LEVEL_MULT); } } else -- 2.11.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org