Commit 0f720584 authored by Jia Qingtong's avatar Jia Qingtong Committed by Xianglai Li
Browse files

LoongArch: KVM: always make pte young in page map's fast path 

mainline inclusion
from mainline-v6.11-rc1
commit d7ad41a31d91abd01a4d9b040074d808899636ea
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IAZJDO


CVE: NA

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

It seems redundant to check if pte is young before the call to
kvm_pte_mkyoung() in kvm_map_page_fast(). Just remove the check.

Reviewed-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarJia Qingtong <jiaqingtong97@gmail.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarXianglai Li <lixianglai@loongson.cn>
parent d93714fa

arch/loongarch/kvm/mmu.c

+2 −4
Original line number Diff line number Diff line
@@ -601,9 +601,7 @@ static int kvm_map_page_fast(struct kvm_vcpu *vcpu, unsigned long gpa, bool writ 
	}



	/* Track access to pages marked old */

	new = *ptep;

	if (!kvm_pte_young(new))

		new = kvm_pte_mkyoung(new);

	new = kvm_pte_mkyoung(*ptep);

	/* call kvm_set_pfn_accessed() after unlock */



	if (write && !kvm_pte_dirty(new)) {