linux-kernel - [PATCH v4 0/3] Count pKVM stage-2 usage in secondary pagetable stat

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Message-ID: <20250313114038.1502357-1-vdonnefort@google.com>
Date: Thu, 13 Mar 2025 11:40:35 +0000
From: Vincent Donnefort <vdonnefort@...gle.com>
To: maz@...nel.org, oliver.upton@...ux.dev, joey.gouly@....com, 
	suzuki.poulose@....com, yuzenghui@...wei.com, catalin.marinas@....com, 
	will@...nel.org
Cc: qperret@...gle.com, linux-arm-kernel@...ts.infradead.org, 
	kvmarm@...ts.linux.dev, linux-kernel@...r.kernel.org, kernel-team@...roid.com, 
	Vincent Donnefort <vdonnefort@...gle.com>
Subject: [PATCH v4 0/3] Count pKVM stage-2 usage in secondary pagetable stat

This series allows to count stage-2 related memory when using pKVM. The
value can be found in the /proc/meminfo field SecPageTables.

Changes since v3: https://lore.kernel.org/all/20250307113411.469018-1-vdonnefort@google.com/
  - Remove unnecessary void * cast (Marc)
  - Rename reclaim_guest_pages() -> reclaim_pgtable_pages() (Marc)
  - Remove unnecessary PAGE_ALIGN(pgd_sz)

Changes since v2: https://lore.kernel.org/all/20250304134347.369854-1-vdonnefort@google.com/
  - Pass a pointer to kvm_hyp_memcache instead of just the flags
    (Oliver)

Changes since v1: https://lore.kernel.org/all/20250228121355.1377891-1-vdonnefort@google.com/
  - Flags to kvm_hyp_memcache
  - Separate stage-2 memcache
  - Account for PGD

Vincent Donnefort (3):
  KVM: arm64: Add flags to kvm_hyp_memcache
  KVM: arm64: Distinct pKVM teardown memcache for stage-2
  KVM: arm64: Count pKVM stage-2 usage in secondary pagetable stats

 arch/arm64/include/asm/kvm_host.h             |  4 ++++
 arch/arm64/kvm/hyp/include/nvhe/mem_protect.h |  2 +-
 arch/arm64/kvm/hyp/nvhe/mem_protect.c         |  2 +-
 arch/arm64/kvm/hyp/nvhe/pkvm.c                |  8 +++----
 arch/arm64/kvm/mmu.c                          | 22 ++++++++++++++-----
 arch/arm64/kvm/pkvm.c                         |  5 +++++
 6 files changed, 32 insertions(+), 11 deletions(-)


base-commit: d082ecbc71e9e0bf49883ee4afd435a77a5101b6
-- 
2.49.0.rc0.332.g42c0ae87b1-goog