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 00/13] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages)
Date: Thu, 30 Sep 2021 16:05:03 +0530 [thread overview]
Message-ID: <1632998116-11552-1-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 v5.15-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/all/1632807225-20189-1-git-send-email-anshuman.khandual@arm.com/
Changes in RFC V3:
- protection_map[] gets reinitialized in platform to avoid build failure per Catalin
- Added __cpu_secondary_check52bitpa()
- Added FEAT_LPA2 support during KVM stage-2 translation
- Updated description for ARM64_PA_BITS_52 per Catalin
- Added tags from last version
Changes in RFC V2:
https://lore.kernel.org/all/1627281445-12445-1-git-send-email-anshuman.khandual@arm.com/
- 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 (13):
arm64/mm: 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 VTCR_EL2.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 __cpu_secondary_check52bitpa()
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
KVM: arm64: Enable FEAT_LPA2 based 52 bits IPA size on 4K and 16K
arch/arm64/Kconfig | 17 +++++++----
arch/arm64/include/asm/assembler.h | 42 +++++++++++++++++++++------
arch/arm64/include/asm/kernel-pgtable.h | 4 +--
arch/arm64/include/asm/kvm_arm.h | 1 +
arch/arm64/include/asm/kvm_pgtable.h | 10 ++++++-
arch/arm64/include/asm/memory.h | 1 +
arch/arm64/include/asm/pgtable-hwdef.h | 28 ++++++++++++++----
arch/arm64/include/asm/pgtable-prot.h | 34 +++++++++++-----------
arch/arm64/include/asm/pgtable.h | 18 ++++++++++--
arch/arm64/include/asm/smp.h | 1 +
arch/arm64/include/asm/sysreg.h | 9 +++---
arch/arm64/kernel/head.S | 51 +++++++++++++++++++++++++++++++++
arch/arm64/kernel/smp.c | 2 ++
arch/arm64/kvm/hyp/pgtable.c | 25 ++++++++++++++--
arch/arm64/kvm/reset.c | 14 ++++++---
arch/arm64/mm/init.c | 22 ++++++++++++++
arch/arm64/mm/mmu.c | 3 ++
arch/arm64/mm/pgd.c | 2 +-
arch/arm64/mm/proc.S | 11 ++++++-
arch/arm64/mm/ptdump.c | 26 +++++++++++++++--
20 files changed, 265 insertions(+), 56 deletions(-)
--
2.7.4
next reply other threads:[~2021-09-30 10:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 10:35 Anshuman Khandual [this message]
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 ` [RFC V3 12/13] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Anshuman Khandual
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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