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 V2 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages)
Date: Mon, 26 Jul 2021 12:07:15 +0530 [thread overview]
Message-ID: <1627281445-12445-1-git-send-email-anshuman.khandual@arm.com> (raw)
This series enables 52 bits PA support for 4K and 16K page configs via
existing CONFIG_ARM64_PA_BITS_52, utilizing a new arch feature FEAT_LPA2
which is available from ARM v8.7. IDMAP needs changes to accommodate two
new level of page tables in certain scenarios like (4K|39VA|52PA) but the
same problem also exists for (16K|36VA|48PA) which needs fixing. I have
sent a fix for 16K case [1] and later will enable it for FEAT_LPA2 as well.
This series applies on v5.14-rc3.
Testing:
Build and boot tested (individual patches) on all existing and new
FEAT_LPA2 enabled config combinations.
Pending:
- Enable IDMAP for FEAT_LPA2
- Enable 52 bit VA range on 4K/16K page sizes
- Evaluate KVM and SMMU impacts from FEAT_LPA2
[1] https://lore.kernel.org/lkml/1627019894-14819-1-git-send-email-anshuman.khandual@arm.com/
Changes in RFC V2:
- Changed FEAT_LPA2 presence qualifying criteria wrt ID_AA64MMFR0_TGRAN_LPA2
- Changed FEAT_LPA2 specific encoding which drops the additional tmp variable
- Fixed [phys|pte]_to_[pte|phys]() helpers when FEAT_LPA2 is implemented
Changes in RFC V1:
https://lore.kernel.org/lkml/1626229291-6569-1-git-send-email-anshuman.khandual@arm.com/
Anshuman Khandual (10):
mm/mmap: Dynamically initialize protection_map[]
arm64/mm: Consolidate TCR_EL1 fields
arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field
arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]
arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2]
arm64/mm: Add FEAT_LPA2 specific encoding
arm64/mm: Detect and enable FEAT_LPA2
arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S
arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented
arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES
arch/arm64/Kconfig | 9 ++++++-
arch/arm64/include/asm/assembler.h | 42 ++++++++++++++++++++++++++-------
arch/arm64/include/asm/kernel-pgtable.h | 4 ++--
arch/arm64/include/asm/memory.h | 1 +
arch/arm64/include/asm/pgtable-hwdef.h | 28 ++++++++++++++++++----
arch/arm64/include/asm/pgtable.h | 18 +++++++++++---
arch/arm64/include/asm/sysreg.h | 9 +++----
arch/arm64/kernel/head.S | 30 +++++++++++++++++++++++
arch/arm64/mm/mmu.c | 3 +++
arch/arm64/mm/pgd.c | 2 +-
arch/arm64/mm/proc.S | 11 ++++++++-
arch/arm64/mm/ptdump.c | 26 ++++++++++++++++++--
mm/mmap.c | 26 ++++++++++++++++----
13 files changed, 177 insertions(+), 32 deletions(-)
--
2.7.4
next reply other threads:[~2021-07-26 6:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-26 6:37 Anshuman Khandual [this message]
2021-07-26 6:37 ` [RFC V2 01/10] mm/mmap: Dynamically initialize protection_map[] Anshuman Khandual
2021-08-05 17:03 ` Catalin Marinas
2021-08-12 9:15 ` Anshuman Khandual
2021-08-13 7:16 ` Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 02/10] arm64/mm: Consolidate TCR_EL1 fields Anshuman Khandual
2021-08-05 17:05 ` Catalin Marinas
2021-07-26 6:37 ` [RFC V2 03/10] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field Anshuman Khandual
2021-08-05 17:06 ` Catalin Marinas
2021-07-26 6:37 ` [RFC V2 04/10] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] Anshuman Khandual
2021-08-05 17:06 ` Catalin Marinas
2021-07-26 6:37 ` [RFC V2 05/10] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] Anshuman Khandual
2021-08-05 17:25 ` Catalin Marinas
2021-08-12 10:09 ` Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 06/10] arm64/mm: Add FEAT_LPA2 specific encoding Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 07/10] arm64/mm: Detect and enable FEAT_LPA2 Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 08/10] arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 09/10] arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented Anshuman Khandual
2021-07-26 6:37 ` [RFC V2 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Anshuman Khandual
2021-08-05 17:23 ` Catalin Marinas
2021-08-12 9:13 ` Anshuman Khandual
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