From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: suzuki.poulose@arm.com, mark.rutland@arm.com, will@kernel.org,
catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com,
steven.price@arm.com,
Anshuman Khandual <anshuman.khandual@arm.com>
Subject: [RFC V3 12/13] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES
Date: Thu, 30 Sep 2021 16:05:15 +0530 [thread overview]
Message-ID: <1632998116-11552-13-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1632998116-11552-1-git-send-email-anshuman.khandual@arm.com>
All required FEAT_LPA2 components for 52 bit PA range are already in place.
Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select
CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arm64/Kconfig | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index f58ef62..926a802 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -948,17 +948,17 @@ config ARM64_PA_BITS_48
bool "48-bit"
config ARM64_PA_BITS_52
- bool "52-bit (ARMv8.2)"
- depends on ARM64_64K_PAGES
+ bool "52-bit"
depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN
select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES
+ select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES)
help
Enable support for a 52-bit physical address space, introduced as
- part of the ARMv8.2-LPA extension.
+ part of the ARMv8.2-LPA or ARMv8.7-LPA2 extension.
With this enabled, the kernel will also continue to work on CPUs that
- do not support ARMv8.2-LPA, but with some added memory overhead (and
- minor performance overhead).
+ do not support ARMv8.2-LPA or ARMv8.7-LPA2, but with some added memory
+ overhead (and minor performance overhead).
endchoice
--
2.7.4
next prev parent reply other threads:[~2021-09-30 10:35 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 10:35 [RFC V3 00/13] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 01/13] arm64/mm: Dynamically initialize protection_map[] Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 02/13] arm64/mm: Consolidate TCR_EL1 fields Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 03/13] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 04/13] arm64/mm: Add FEAT_LPA2 specific VTCR_EL2.DS field Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 05/13] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 06/13] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 07/13] arm64/mm: Add FEAT_LPA2 specific encoding Anshuman Khandual
2021-10-12 10:41 ` Suzuki K Poulose
2021-10-13 2:55 ` Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 08/13] arm64/mm: Detect and enable FEAT_LPA2 Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 09/13] arm64/mm: Add __cpu_secondary_check52bitpa() Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 10/13] arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 11/13] arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented Anshuman Khandual
2021-09-30 10:35 ` Anshuman Khandual [this message]
2021-09-30 10:35 ` [RFC V3 13/13] KVM: arm64: Enable FEAT_LPA2 based 52 bits IPA size on 4K and 16K Anshuman Khandual
2021-10-11 10:16 ` Marc Zyngier
2021-10-12 4:24 ` Anshuman Khandual
2021-10-12 8:30 ` Marc Zyngier
2021-10-13 3:28 ` Anshuman Khandual
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