[RFC PATCH 5/7] kvm: arm64: Add some HW_DBM related mmu interfaces
From: Keqian Zhu <hidden>
Date: 2021-01-26 13:22:24
Also in:
kvm, kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
This adds set_dbm, clear_dbm and sync_dirty interfaces in mmu layer. They simply wrap those interfaces of pgtable layer, adding reschedule semantics. Signed-off-by: Keqian Zhu <redacted> --- arch/arm64/include/asm/kvm_mmu.h | 7 +++++++ arch/arm64/kvm/mmu.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index e52d82aeadca..51dd31ba1b94 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h@@ -183,6 +183,13 @@ int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size, void **haddr); void free_hyp_pgds(void); +void kvm_stage2_clear_dbm(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages); +void kvm_stage2_set_dbm(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages); +void kvm_stage2_sync_dirty(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages); + void stage2_unmap_vm(struct kvm *kvm); int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu); void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu);
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 7d2257cc5438..18717fd12731 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c@@ -609,6 +609,36 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask); } +void kvm_stage2_clear_dbm(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages) +{ + phys_addr_t base_gfn = slot->base_gfn + gfn_offset; + phys_addr_t addr = base_gfn << PAGE_SHIFT; + phys_addr_t end = (base_gfn + npages) << PAGE_SHIFT; + + stage2_apply_range_resched(kvm, addr, end, kvm_pgtable_stage2_clear_dbm); +} + +void kvm_stage2_set_dbm(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages) +{ + phys_addr_t base_gfn = slot->base_gfn + gfn_offset; + phys_addr_t addr = base_gfn << PAGE_SHIFT; + phys_addr_t end = (base_gfn + npages) << PAGE_SHIFT; + + stage2_apply_range_resched(kvm, addr, end, kvm_pgtable_stage2_set_dbm); +} + +void kvm_stage2_sync_dirty(struct kvm *kvm, struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long npages) +{ + phys_addr_t base_gfn = slot->base_gfn + gfn_offset; + phys_addr_t addr = base_gfn << PAGE_SHIFT; + phys_addr_t end = (base_gfn + npages) << PAGE_SHIFT; + + stage2_apply_range_resched(kvm, addr, end, kvm_pgtable_stage2_sync_dirty); +} + static void clean_dcache_guest_page(kvm_pfn_t pfn, unsigned long size) { __clean_dcache_guest_page(pfn, size);
--
2.19.1
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