github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-07 06:17:02 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: Disable stage-2 ptdump of pKVM

Browse Source 
With pKVM enabled, guest stage-2 page tables are owned and managed by
the hypervisor. The host's pgt is uninitialised.

Skip registering stage-2 ptdump debugfs files when protected KVM is
enabled.

Fixes: fce886a602 ("KVM: arm64: Plumb the pKVM MMU in KVM")
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20260924100459.831013-1-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Vincent Donnefort 2026-09-24 11:04:59 +01:00 committed by Marc Zyngier
parent 67d00fcc00
commit 0dea17ffe6
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kvm/ptdump.c
View File

@ -300,6 +300,10 @@ void kvm_nested_s2_ptdump_remove_debugfs(struct kvm_s2_mmu *mmu)
void kvm_s2_ptdump_create_debugfs(struct kvm *kvm)
{
/* pKVM handles the page-tables in the hypervisor */
if (is_protected_kvm_enabled())
return;
debugfs_create_file("stage2_page_tables", 0400, kvm->debugfs_dentry,
&kvm->arch.mmu, &kvm_ptdump_guest_fops);
debugfs_create_file("ipa_range", 0400, kvm->debugfs_dentry,