On 4/9/23 2:29 PM, Ricardo Koller wrote:
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@xxxxxxxxxx>
---
arch/arm64/kvm/mmu.c | 42 +++++++++++++++---------------------------
1 file changed, 15 insertions(+), 27 deletions(-)
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index aaefabd8de89d..16fa24f761152 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1058,28 +1058,6 @@ static void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot)
kvm_flush_remote_tlbs(kvm);
}
-/**
- * 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
@@ -1109,17 +1087,27 @@ 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)
