Commit 7478efba authored Jul 09, 2024 by Bibo Mao Committed by Xianglai Li Dec 04, 2024

LoongArch: KVM: Add dirty bitmap initially all set support

mainline inclusion
from mainline-v6.11-rc1
commit 8c347042527058976e8a1cb10c0ae31e55145f76
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IAZJDO


CVE: NA

--------------------------------

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>
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>

parent 832cd8eb

arch/loongarch/include/asm/kvm_host.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -59,6 +59,10 @@

		#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;

arch/loongarch/kvm/mmu.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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,