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| author | Quentin Perret <qperret@google.com> | 2020-09-11 14:25:20 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-11 15:51:14 +0100 |
| commit | 73d49df2c3e7cad5bf64c92ec03ce9e3823898b9 (patch) | |
| tree | 556270df771e3dfde4fdfbb283b4c9461a5fd447 /arch/arm64/kvm/hyp/pgtable.c | |
| parent | ee8efad7994ce204806260bc0261c7e103f704c1 (diff) | |
| download | linux-73d49df2c3e7cad5bf64c92ec03ce9e3823898b9.tar.gz | |
KVM: arm64: Add support for stage-2 write-protect in generic page-table
Add a stage-2 wrprotect() operation to the generic page-table code. Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Cc: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200911132529.19844-13-will@kernel.org
Diffstat (limited to 'arch/arm64/kvm/hyp/pgtable.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/pgtable.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index af60ea8ee29d..480b95030f54 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -746,6 +746,12 @@ static int stage2_update_leaf_attrs(struct kvm_pgtable *pgt, u64 addr, return 0; } +int kvm_pgtable_stage2_wrprotect(struct kvm_pgtable *pgt, u64 addr, u64 size) +{ + return stage2_update_leaf_attrs(pgt, addr, size, 0, + KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W, NULL); +} + kvm_pte_t kvm_pgtable_stage2_mkyoung(struct kvm_pgtable *pgt, u64 addr) { kvm_pte_t pte = 0; |