From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, Catalin.Marinas@arm.com,
Will.Deacon@arm.com, Mark.Rutland@arm.com, Marc.Zyngier@arm.com,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
ard.biesheuvel@linaro.org, suzuki.poulose@arm.com,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: [PATCH 04/15] arm64: Calculate size for idmap_pg_dir at compile time
Date: Tue, 15 Sep 2015 16:41:13 +0100 [thread overview]
Message-ID: <1442331684-28818-5-git-send-email-suzuki.poulose@arm.com> (raw)
In-Reply-To: <1442331684-28818-1-git-send-email-suzuki.poulose@arm.com>
From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
Now that we can calculate the number of levels required for
mapping a va width, reserve exact number of pages that would
be required to cover the idmap. The idmap should be able to handle
the maximum physical address size supported.
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm64/include/asm/boot.h | 1 +
arch/arm64/include/asm/kernel-pgtable.h | 7 +++++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/boot.h b/arch/arm64/include/asm/boot.h
index 81151b6..678b63e 100644
--- a/arch/arm64/include/asm/boot.h
+++ b/arch/arm64/include/asm/boot.h
@@ -2,6 +2,7 @@
#ifndef __ASM_BOOT_H
#define __ASM_BOOT_H
+#include <asm/page.h>
#include <asm/sizes.h>
/*
diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index 5876a36..def7168 100644
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -33,16 +33,19 @@
* map to pte level. The swapper also maps the FDT (see __create_page_tables
* for more information). Note that the number of ID map translation levels
* could be increased on the fly if system RAM is out of reach for the default
- * VA range, so 3 pages are reserved in all cases.
+ * VA range, so pages required to map highest possible PA are reserved in all
+ * cases.
*/
#if ARM64_SWAPPER_USES_SECTION_MAPS
#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1)
+#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT) - 1)
#else
#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS)
+#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT))
#endif
#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE)
-#define IDMAP_DIR_SIZE (3 * PAGE_SIZE)
+#define IDMAP_DIR_SIZE (IDMAP_PGTABLE_LEVELS * PAGE_SIZE)
/* Initial memory map size */
#if ARM64_SWAPPER_USES_SECTION_MAPS
--
1.7.9.5
next prev parent reply other threads:[~2015-09-15 15:46 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-15 15:41 [PATCHv2 00/15] arm64: 16K translation granule support Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 01/15] arm64: Move swapper pagetable definitions Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 02/15] arm64: Handle section maps for swapper/idmap Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 03/15] arm64: Introduce helpers for page table levels Suzuki K. Poulose
2015-10-07 8:26 ` Christoffer Dall
2015-10-07 9:26 ` Marc Zyngier
2015-10-07 9:48 ` Suzuki K. Poulose
2015-10-08 14:45 ` Christoffer Dall
2015-10-08 17:22 ` Suzuki K. Poulose
2015-10-08 17:28 ` Catalin Marinas
2015-10-09 9:22 ` Suzuki K. Poulose
2015-10-07 9:51 ` Suzuki K. Poulose
2015-09-15 15:41 ` Suzuki K. Poulose [this message]
2015-09-15 15:41 ` [PATCH 05/15] arm64: Handle 4 level page table for swapper Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 06/15] arm64: Clean config usages for page size Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 07/15] arm64: Kconfig: Fix help text about AArch32 support with 64K pages Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 08/15] arm64: Check for selected granule support Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 09/15] arm64: Add page size to the kernel image header Suzuki K. Poulose
2015-10-02 15:49 ` Catalin Marinas
2015-10-02 16:31 ` Catalin Marinas
2015-10-02 16:50 ` Marc Zyngier
2015-10-05 15:43 ` Christoffer Dall
2015-10-05 13:02 ` Suzuki K. Poulose
2015-10-05 13:22 ` Ard Biesheuvel
2015-10-10 17:22 ` Christoffer Dall
2015-09-15 15:41 ` [PATCH 10/15] arm64: kvm: Fix {V}TCR_EL2_TG0 mask Suzuki K. Poulose
2015-10-08 15:17 ` Christoffer Dall
2015-09-15 15:41 ` [PATCH 11/15] arm64: Cleanup VTCR_EL2 computation Suzuki K. Poulose
2015-10-07 10:11 ` Marc Zyngier
2015-10-07 10:23 ` Suzuki K. Poulose
2015-10-10 17:22 ` Christoffer Dall
2015-09-15 15:41 ` [PATCH 12/15] arm: kvm: Move fake PGD handling to arch specific files Suzuki K. Poulose
2015-10-07 10:23 ` Marc Zyngier
2015-10-10 17:22 ` Christoffer Dall
2015-09-15 15:41 ` [PATCH 13/15] arm64: kvm: Rewrite fake pgd handling Suzuki K. Poulose
2015-10-07 11:13 ` Marc Zyngier
2015-10-07 12:21 ` Suzuki K. Poulose
2015-10-10 14:52 ` Christoffer Dall
2015-10-12 9:55 ` Suzuki K. Poulose
2015-10-13 15:39 ` Christoffer Dall
2015-10-13 16:04 ` Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 14/15] arm64: Add 16K page size support Suzuki K. Poulose
2015-09-15 15:41 ` [PATCH 15/15] arm64: 36 bit VA Suzuki K. Poulose
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