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From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: akpm@linux-foundation.org, 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 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES
Date: Wed, 14 Jul 2021 07:51:31 +0530	[thread overview]
Message-ID: <1626229291-6569-11-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1626229291-6569-1-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 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 658a6fd..bc7e5c6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -952,9 +952,9 @@ config ARM64_PA_BITS_48
 
 config ARM64_PA_BITS_52
 	bool "52-bit (ARMv8.2)"
-	depends on ARM64_64K_PAGES
 	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.
-- 
2.7.4



      parent reply	other threads:[~2021-07-14  2:21 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-14  2:21 [RFC 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Anshuman Khandual
2021-07-14  2:21 ` [RFC 01/10] mm/mmap: Dynamically initialize protection_map[] Anshuman Khandual
2021-07-14  2:21 ` [RFC 02/10] arm64/mm: Consolidate TCR_EL1 fields Anshuman Khandual
2021-07-14  2:21 ` [RFC 03/10] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field Anshuman Khandual
2021-07-14  2:21 ` [RFC 04/10] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] Anshuman Khandual
2021-07-14  2:21 ` [RFC 05/10] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] Anshuman Khandual
2021-07-14  2:21 ` [RFC 06/10] arm64/mm: Add FEAT_LPA2 specific encoding Anshuman Khandual
2021-07-14 15:38   ` Steven Price
2021-07-16  7:20     ` Anshuman Khandual
2021-07-16 10:02       ` Steven Price
2021-07-16 14:37         ` Anshuman Khandual
2021-07-14  2:21 ` [RFC 07/10] arm64/mm: Detect and enable FEAT_LPA2 Anshuman Khandual
2021-07-14  8:21   ` Suzuki K Poulose
2021-07-16  7:06     ` Anshuman Khandual
2021-07-16  8:08       ` Suzuki K Poulose
2021-07-19  4:47         ` Anshuman Khandual
2021-07-14  2:21 ` [RFC 08/10] arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S Anshuman Khandual
2021-07-14  2:21 ` [RFC 09/10] arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented Anshuman Khandual
2021-07-14  2:21 ` Anshuman Khandual [this message]

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