Re: [PATCH v4 0/3] Count pKVM stage-2 usage in secondary pagetable stat
From: Marc Zyngier
Date: Thu Mar 13 2025 - 09:19:13 EST
On Thu, 13 Mar 2025 11:40:35 +0000,
Vincent Donnefort <vdonnefort@xxxxxxxxxx> 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@xxxxxxxxxx/
> - 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@xxxxxxxxxx/
> - 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@xxxxxxxxxx/
> - 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@xxxxxxxxxx>
M.
--
Without deviation from the norm, progress is not possible.