[v2] KVM: arm64: nv: Expose shadow page tables in debugfs

[PATCH v2 0/2] KVM: arm64: nv: Expose shadow page tables in debugfs

Posted by Wei-Lin Chang 2 weeks, 6 days ago

Hi,

This is v2 of exposing shadow page tables in debugfs, there are a few
small improvements, please see below.

Changes in v2:
 - move debugfs_nv_dentry also behind CONFIG_PTDUMP_STAGE2_DEBUGFS
 - use a macro to define the file names of shadow ptdumps, also
   explicitly spell out the string to get its maximum size
 - add Reviewed-by tag from Sebastian (thanks!)
 - Link to v1: https://lore.kernel.org/kvmarm/20260308231829.864983-1-weilin.chang@arm.com/

Wei-Lin Chang (2):
  KVM: arm64: ptdump: Make KVM ptdump code s2 mmu aware
  KVM: arm64: nv: Expose shadow page tables in debugfs

 arch/arm64/include/asm/kvm_host.h |  9 +++++
 arch/arm64/include/asm/kvm_mmu.h  |  4 +++
 arch/arm64/kvm/nested.c           |  6 +++-
 arch/arm64/kvm/ptdump.c           | 60 ++++++++++++++++++++++---------
 4 files changed, 62 insertions(+), 17 deletions(-)

-- 
2.43.0

Re: [PATCH v2 0/2] KVM: arm64: nv: Expose shadow page tables in debugfs

Posted by Marc Zyngier 2 weeks ago

On Tue, 17 Mar 2026 18:26:36 +0000, Wei-Lin Chang wrote:
> This is v2 of exposing shadow page tables in debugfs, there are a few
> small improvements, please see below.
> 
> Changes in v2:
>  - move debugfs_nv_dentry also behind CONFIG_PTDUMP_STAGE2_DEBUGFS
>  - use a macro to define the file names of shadow ptdumps, also
>    explicitly spell out the string to get its maximum size
>  - add Reviewed-by tag from Sebastian (thanks!)
>  - Link to v1: https://lore.kernel.org/kvmarm/20260308231829.864983-1-weilin.chang@arm.com/
> 
> [...]

Applied to next, thanks!

[1/2] KVM: arm64: ptdump: Make KVM ptdump code s2 mmu aware
      commit: 204f7c018d76c2488a90fc6681519b8eb6eebb1d
[2/2] KVM: arm64: nv: Expose shadow page tables in debugfs
      commit: 19e15dc73f0fc74eaf63ad9b3a50648450269b4d

Cheers,

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

Re: [PATCH v2 0/2] KVM: arm64: nv: Expose shadow page tables in debugfs

Posted by Joey Gouly 2 weeks, 5 days ago

On Tue, Mar 17, 2026 at 06:26:36PM +0000, Wei-Lin Chang wrote:
> Hi,
> 
> This is v2 of exposing shadow page tables in debugfs, there are a few
> small improvements, please see below.
> 
> Changes in v2:
>  - move debugfs_nv_dentry also behind CONFIG_PTDUMP_STAGE2_DEBUGFS
>  - use a macro to define the file names of shadow ptdumps, also
>    explicitly spell out the string to get its maximum size
>  - add Reviewed-by tag from Sebastian (thanks!)
>  - Link to v1: https://lore.kernel.org/kvmarm/20260308231829.864983-1-weilin.chang@arm.com/
> 
> Wei-Lin Chang (2):
>   KVM: arm64: ptdump: Make KVM ptdump code s2 mmu aware
>   KVM: arm64: nv: Expose shadow page tables in debugfs

Reviewed-by: Joey Gouly <joey.gouly@arm.com>

> 
>  arch/arm64/include/asm/kvm_host.h |  9 +++++
>  arch/arm64/include/asm/kvm_mmu.h  |  4 +++
>  arch/arm64/kvm/nested.c           |  6 +++-
>  arch/arm64/kvm/ptdump.c           | 60 ++++++++++++++++++++++---------
>  4 files changed, 62 insertions(+), 17 deletions(-)
> 
> -- 
> 2.43.0
>