This is a note to let you know that I've just added the patch titled
KVM: arm64: Use TLBI_TTL_UNKNOWN in __kvm_tlb_flush_vmid_range()
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-arm64-use-tlbi_ttl_unknown-in-__kvm_tlb_flush_vmid_range.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0f0ff097bf77663b8d2692e33d56119947611bb0 Mon Sep 17 00:00:00 2001
From: Will Deacon <will@xxxxxxxxxx>
Date: Wed, 27 Mar 2024 12:48:52 +0000
Subject: KVM: arm64: Use TLBI_TTL_UNKNOWN in __kvm_tlb_flush_vmid_range()
From: Will Deacon <will@xxxxxxxxxx>
commit 0f0ff097bf77663b8d2692e33d56119947611bb0 upstream.
Commit c910f2b65518 ("arm64/mm: Update tlb invalidation routines for
FEAT_LPA2") updated the __tlbi_level() macro to take the target level
as an argument, with TLBI_TTL_UNKNOWN (rather than 0) indicating that
the caller cannot provide level information. Unfortunately, the two
implementations of __kvm_tlb_flush_vmid_range() were not updated and so
now ask for an level 0 invalidation if FEAT_LPA2 is implemented.
Fix the problem by passing TLBI_TTL_UNKNOWN instead of 0 as the level
argument to __flush_s2_tlb_range_op() in __kvm_tlb_flush_vmid_range().
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Oliver Upton <oliver.upton@xxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Reviewed-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Fixes: c910f2b65518 ("arm64/mm: Update tlb invalidation routines for FEAT_LPA2")
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Reviewed-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240327124853.11206-4-will@xxxxxxxxxx
Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kvm/hyp/nvhe/tlb.c | 3 ++-
arch/arm64/kvm/hyp/vhe/tlb.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
--- a/arch/arm64/kvm/hyp/nvhe/tlb.c
+++ b/arch/arm64/kvm/hyp/nvhe/tlb.c
@@ -154,7 +154,8 @@ void __kvm_tlb_flush_vmid_range(struct k
/* Switch to requested VMID */
__tlb_switch_to_guest(mmu, &cxt, false);
- __flush_s2_tlb_range_op(ipas2e1is, start, pages, stride, 0);
+ __flush_s2_tlb_range_op(ipas2e1is, start, pages, stride,
+ TLBI_TTL_UNKNOWN);
dsb(ish);
__tlbi(vmalle1is);
--- a/arch/arm64/kvm/hyp/vhe/tlb.c
+++ b/arch/arm64/kvm/hyp/vhe/tlb.c
@@ -171,7 +171,8 @@ void __kvm_tlb_flush_vmid_range(struct k
/* Switch to requested VMID */
__tlb_switch_to_guest(mmu, &cxt);
- __flush_s2_tlb_range_op(ipas2e1is, start, pages, stride, 0);
+ __flush_s2_tlb_range_op(ipas2e1is, start, pages, stride,
+ TLBI_TTL_UNKNOWN);
dsb(ish);
__tlbi(vmalle1is);
Patches currently in stable-queue which might be from will@xxxxxxxxxx are
queue-6.8/kvm-arm64-use-tlbi_ttl_unknown-in-__kvm_tlb_flush_vmid_range.patch
queue-6.8/kvm-arm64-ensure-target-address-is-granule-aligned-for-range-tlbi.patch
