From: Mike Rapoport <rppt@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Brian Cain <bcain@codeaurora.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Fenghua Yu <fenghua.yu@intel.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Guan Xuetao <gxt@pku.edu.cn>, James Morse <james.morse@arm.com>,
Jonas Bonn <jonas@southpole.se>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Ley Foon Tan <ley.foon.tan@intel.com>,
Marc Zyngier <maz@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Paul Mackerras <paulus@samba.org>, Rich Felker <dalias@libc.org>,
Russell King <linux@armlinux.org.uk>,
Stafford Horne <shorne@gmail.com>,
Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Tony Luck <tony.luck@intel.com>, Will Deacon <will@kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org,
linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
linux-sh@vger.kernel.org, nios2-dev@lists.rocketboards.org,
openrisc@lists.librecores.org,
uclinux-h8-devel@lists.sourceforge.jp,
Mike Rapoport <rppt@kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>
Subject: [PATCH v3 06/14] openrisc: add support for folded p4d page tables
Date: Thu, 27 Feb 2020 10:46:00 +0200 [thread overview]
Message-ID: <20200227084608.18223-7-rppt@kernel.org> (raw)
In-Reply-To: <20200227084608.18223-1-rppt@kernel.org>
From: Mike Rapoport <rppt@linux.ibm.com>
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
arch/openrisc/include/asm/pgtable.h | 1 -
arch/openrisc/mm/fault.c | 10 ++++++++--
arch/openrisc/mm/init.c | 4 +++-
3 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h
index 248d22d8faa7..c072943fc721 100644
--- a/arch/openrisc/include/asm/pgtable.h
+++ b/arch/openrisc/include/asm/pgtable.h
@@ -21,7 +21,6 @@
#ifndef __ASM_OPENRISC_PGTABLE_H
#define __ASM_OPENRISC_PGTABLE_H
-#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopmd.h>
#ifndef __ASSEMBLY__
diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c
index 5d4d3a9691d0..44aa04545de3 100644
--- a/arch/openrisc/mm/fault.c
+++ b/arch/openrisc/mm/fault.c
@@ -296,6 +296,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
int offset = pgd_index(address);
pgd_t *pgd, *pgd_k;
+ p4d_t *p4d, *p4d_k;
pud_t *pud, *pud_k;
pmd_t *pmd, *pmd_k;
pte_t *pte_k;
@@ -322,8 +323,13 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
* it exists.
*/
- pud = pud_offset(pgd, address);
- pud_k = pud_offset(pgd_k, address);
+ p4d = p4d_offset(pgd, address);
+ p4d_k = p4d_offset(pgd_k, address);
+ if (!p4d_present(*p4d_k))
+ goto no_context;
+
+ pud = pud_offset(p4d, address);
+ pud_k = pud_offset(p4d_k, address);
if (!pud_present(*pud_k))
goto no_context;
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index 1f87b524db78..2536aeae0975 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -71,6 +71,7 @@ static void __init map_ram(void)
unsigned long v, p, e;
pgprot_t prot;
pgd_t *pge;
+ p4d_t *p4e;
pud_t *pue;
pmd_t *pme;
pte_t *pte;
@@ -90,7 +91,8 @@ static void __init map_ram(void)
while (p < e) {
int j;
- pue = pud_offset(pge, v);
+ p4e = p4d_offset(pge, v);
+ pue = pud_offset(p4e, v);
pme = pmd_offset(pue, v);
if ((u32) pue != (u32) pge || (u32) pme != (u32) pge) {
--
2.24.0
next prev parent reply other threads:[~2020-02-27 8:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 8:45 [PATCH v3 00/14] mm: remove __ARCH_HAS_5LEVEL_HACK Mike Rapoport
2020-02-27 8:45 ` [PATCH v3 01/14] arm/arm64: add support for folded p4d page tables Mike Rapoport
2020-02-27 8:45 ` [PATCH v3 02/14] h8300: remove usage of __ARCH_USE_5LEVEL_HACK Mike Rapoport
2020-02-27 8:45 ` [PATCH v3 03/14] hexagon: remove __ARCH_USE_5LEVEL_HACK Mike Rapoport
2020-02-27 8:45 ` [PATCH v3 04/14] ia64: add support for folded p4d page tables Mike Rapoport
2020-02-27 8:45 ` [PATCH v3 05/14] nios2: " Mike Rapoport
2020-02-27 8:46 ` Mike Rapoport [this message]
2020-02-27 8:46 ` [PATCH v3 07/14] powerpc/32: drop get_pteptr() Mike Rapoport
2020-03-07 4:00 ` Andrew Morton
2020-03-08 10:54 ` Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 08/14] powerpc: add support for folded p4d page tables Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 09/14] sh: fault: Modernize printing of kernel messages Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 10/14] sh: drop __pXd_offset() macros that duplicate pXd_index() ones Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 11/14] sh: add support for folded p4d page tables Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 12/14] unicore32: remove __ARCH_USE_5LEVEL_HACK Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 13/14] asm-generic: remove pgtable-nop4d-hack.h Mike Rapoport
2020-02-27 8:46 ` [PATCH v3 14/14] mm: remove __ARCH_HAS_5LEVEL_HACK and include/asm-generic/5level-fixup.h Mike Rapoport
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