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| author | Ricardo Koller <ricarkol@google.com> | 2023-04-26 20:23:28 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-05-16 20:39:18 +0300 |
| commit | 3005f6f29447d4f397c2ba67119fdea222ee51d3 (patch) | |
| tree | c616c95036826e0e7c4f111c23698f342b439086 /arch/arm64/kvm/mmu.c | |
| parent | e7bf7a490c68b0b64bc05aa0a4f09f6044037db1 (diff) | |
| download | linux-3005f6f29447d4f397c2ba67119fdea222ee51d3.tar.xz | |
KVM: arm64: Open-code kvm_mmu_write_protect_pt_masked()
Move the functionality of kvm_mmu_write_protect_pt_masked() into its
caller, kvm_arch_mmu_enable_log_dirty_pt_masked(). This will be used
in a subsequent commit in order to share some of the code in
kvm_arch_mmu_enable_log_dirty_pt_masked().
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Link: https://lore.kernel.org/r/20230426172330.1439644-11-ricarkol@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/mmu.c')
| -rw-r--r-- | arch/arm64/kvm/mmu.c | 42 |
1 files changed, 15 insertions, 27 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index a36a01426b59..272558f54101 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1079,28 +1079,6 @@ static void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot) } /** - * kvm_mmu_write_protect_pt_masked() - write protect dirty pages - * @kvm: The KVM pointer - * @slot: The memory slot associated with mask - * @gfn_offset: The gfn offset in memory slot - * @mask: The mask of dirty pages at offset 'gfn_offset' in this memory - * slot to be write protected - * - * Walks bits set in mask write protects the associated pte's. Caller must - * acquire kvm_mmu_lock. - */ -static void kvm_mmu_write_protect_pt_masked(struct kvm *kvm, - struct kvm_memory_slot *slot, - gfn_t gfn_offset, unsigned long mask) -{ - phys_addr_t base_gfn = slot->base_gfn + gfn_offset; - phys_addr_t start = (base_gfn + __ffs(mask)) << PAGE_SHIFT; - phys_addr_t end = (base_gfn + __fls(mask) + 1) << PAGE_SHIFT; - - stage2_wp_range(&kvm->arch.mmu, start, end); -} - -/** * kvm_mmu_split_memory_region() - split the stage 2 blocks into PAGE_SIZE * pages for memory slot * @kvm: The KVM pointer @@ -1129,17 +1107,27 @@ static void kvm_mmu_split_memory_region(struct kvm *kvm, int slot) } /* - * kvm_arch_mmu_enable_log_dirty_pt_masked - enable dirty logging for selected - * dirty pages. + * kvm_arch_mmu_enable_log_dirty_pt_masked() - enable dirty logging for selected pages. + * @kvm: The KVM pointer + * @slot: The memory slot associated with mask + * @gfn_offset: The gfn offset in memory slot + * @mask: The mask of pages at offset 'gfn_offset' in this memory + * slot to enable dirty logging on * - * It calls kvm_mmu_write_protect_pt_masked to write protect selected pages to - * enable dirty logging for them. + * Writes protect selected pages to enable dirty logging for them. Caller must + * acquire kvm->mmu_lock. */ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn_offset, unsigned long mask) { - kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask); + phys_addr_t base_gfn = slot->base_gfn + gfn_offset; + phys_addr_t start = (base_gfn + __ffs(mask)) << PAGE_SHIFT; + phys_addr_t end = (base_gfn + __fls(mask) + 1) << PAGE_SHIFT; + + lockdep_assert_held_write(&kvm->mmu_lock); + + stage2_wp_range(&kvm->arch.mmu, start, end); } static void kvm_send_hwpoison_signal(unsigned long address, short lsb) |