From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
kvmarm@lists.cs.columbia.edu, catalin.marinas@arm.com,
will.deacon@arm.com, mark.rutland@arm.com, marc.zyngier@arm.com,
"Suzuki K. Poulose" <suzuki.poulose@arm.com>
Subject: [PATCH 14/14] arm64: 36 bit VA
Date: Thu, 13 Aug 2015 12:34:04 +0100 [thread overview]
Message-ID: <1439465645-22584-15-git-send-email-suzuki.poulose@arm.com> (raw)
In-Reply-To: <1439465645-22584-1-git-send-email-suzuki.poulose@arm.com>
From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
36bit VA lets us use 2 level page tables while limiting the
available address space to 64GB.
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>
---
arch/arm64/Kconfig | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 8327edf..0407fd3 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -164,6 +164,7 @@ config FIX_EARLYCON_MEM
config PGTABLE_LEVELS
int
+ default 2 if ARM64_16K_PAGES && ARM64_VA_BITS_36
default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
@@ -472,6 +473,10 @@ choice
space sizes. The level of translation table is determined by
a combination of page size and virtual address space size.
+config ARM64_VA_BITS_36
+ bool "36-bit"
+ depends on ARM64_16K_PAGES
+
config ARM64_VA_BITS_39
bool "39-bit"
depends on ARM64_4K_PAGES
@@ -491,6 +496,7 @@ endchoice
config ARM64_VA_BITS
int
+ default 36 if ARM64_VA_BITS_36
default 39 if ARM64_VA_BITS_39
default 42 if ARM64_VA_BITS_42
default 47 if ARM64_VA_BITS_47
@@ -564,7 +570,7 @@ config ARCH_WANT_GENERAL_HUGETLB
def_bool y
config ARCH_WANT_HUGE_PMD_SHARE
- def_bool y if ARM64_4K_PAGES || ARM64_16K_PAGES
+ def_bool y if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
def_bool y
--
1.7.9.5
next prev parent reply other threads:[~2015-08-13 11:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-13 11:33 [PATCH 00/14] arm64: 16K translation granule support Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 01/14] arm64: Move swapper pagetable definitions Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 02/14] arm64: Handle section maps for swapper/idmap Suzuki K. Poulose
2015-09-02 9:38 ` Ard Biesheuvel
2015-09-02 9:42 ` Suzuki K. Poulose
2015-09-02 10:00 ` Ard Biesheuvel
2015-08-13 11:33 ` [PATCH 03/14] arm64: Introduce helpers for page table levels Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 04/14] arm64: Calculate size for idmap_pg_dir at compile time Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 05/14] arm64: Handle 4 level page table for swapper Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 06/14] arm64: Clean config usages for page size Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 07/14] arm64: Kconfig: Fix help text about AArch32 support with 64K pages Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 08/14] arm64: kvm: Fix {V}TCR_EL2_TG0 mask Suzuki K. Poulose
2015-08-13 11:33 ` [PATCH 09/14] arm64: Cleanup VTCR_EL2 computation Suzuki K. Poulose
2015-08-13 11:34 ` [PATCH 10/14] arm: kvm: Move fake PGD handling to arch specific files Suzuki K. Poulose
2015-08-13 11:34 ` [PATCH 11/14] arm64: kvm: Rewrite fake pgd handling Suzuki K. Poulose
2015-08-13 11:34 ` [PATCH 12/14] arm64: Check for selected granule support Suzuki K. Poulose
2015-08-13 12:28 ` Steve Capper
2015-08-13 14:45 ` Suzuki K. Poulose
2015-08-13 17:29 ` Catalin Marinas
2015-09-02 9:48 ` Ard Biesheuvel
2015-09-02 10:19 ` Ard Biesheuvel
2015-09-04 13:58 ` Catalin Marinas
2015-08-13 11:34 ` [PATCH 13/14] arm64: Add 16K page size support Suzuki K. Poulose
2015-08-13 11:34 ` Suzuki K. Poulose [this message]
2015-09-02 9:55 ` [PATCH 00/14] arm64: 16K translation granule support Ard Biesheuvel
2015-09-02 10:11 ` Suzuki K. Poulose
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