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* [RFC V2 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages)
@ 2021-07-26  6:37 Anshuman Khandual
  2021-07-26  6:37 ` [RFC V2 01/10] mm/mmap: Dynamically initialize protection_map[] Anshuman Khandual
                   ` (9 more replies)
  0 siblings, 10 replies; 21+ messages in thread
From: Anshuman Khandual @ 2021-07-26  6:37 UTC (permalink / raw)
  To: linux-arm-kernel, linux-kernel, linux-mm
  Cc: akpm, suzuki.poulose, mark.rutland, will, catalin.marinas, maz,
	james.morse, steven.price, Anshuman Khandual

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


^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2021-08-13  7:16 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-26  6:37 [RFC V2 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Anshuman Khandual
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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