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LoongArch: KVM: Add dirty bitmap initially all set support

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Add KVM_DIRTY_LOG_INITIALLY_SET support on LoongArch system, this
feature comes from other architectures like x86 and arm64.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2024-07-09 16:25:51 +08:00 committed by Huacai Chen
parent 32d4b999da
commit 8c34704252
2 changed files with 10 additions and 0 deletions
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3
arch/loongarch/include/asm/kvm_host.h
View File

@ -37,6 +37,9 @@
#define KVM_GUESTDBG_VALID_MASK \
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP | KVM_GUESTDBG_SINGLESTEP)
#define KVM_DIRTY_LOG_MANUAL_CAPS \
(KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | KVM_DIRTY_LOG_INITIALLY_SET)
struct kvm_vm_stat {
struct kvm_vm_stat_generic generic;
u64 pages;

7
arch/loongarch/kvm/mmu.c
View File

@ -467,6 +467,13 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
* kvm_arch_flush_shadow_memslot()
*/
if (!(old_flags & KVM_MEM_LOG_DIRTY_PAGES) && log_dirty_pages) {
/*
* Initially-all-set does not require write protecting any page
* because they're all assumed to be dirty.
*/
if (kvm_dirty_log_manual_protect_and_init_set(kvm))
return;
spin_lock(&kvm->mmu_lock);
/* Write protect GPA page table entries */
needs_flush = kvm_mkclean_gpa_pt(kvm, new->base_gfn,