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

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Message-ID: <86jz8tnkej.wl-maz@kernel.org>
Date: Thu, 13 Mar 2025 13:13:24 +0000
From: Marc Zyngier <maz@...nel.org>
To: Vincent Donnefort <vdonnefort@...gle.com>
Cc: oliver.upton@...ux.dev,
	joey.gouly@....com,
	suzuki.poulose@....com,
	yuzenghui@...wei.com,
	catalin.marinas@....com,
	will@...nel.org,
	qperret@...gle.com,
	linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	kernel-team@...roid.com
Subject: Re: [PATCH v4 0/3] Count pKVM stage-2 usage in secondary pagetable stat

On Thu, 13 Mar 2025 11:40:35 +0000,
Vincent Donnefort <vdonnefort@...gle.com> wrote:
> 
> 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(-)

Acked-by: Marc Zyngier <maz@...nel.org>

	M.

-- 
Without deviation from the norm, progress is not possible.