From: Huacai Chen <chenhuacai@loongson.cn>
Date: Tue, 1 Oct 2024 08:55:21 +0000 (+0800)
Subject: Revert "LoongArch: KVM: Invalidate guest steal time address on vCPU reset"
X-Git-Tag: v6.10.13~137
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51f87aa74da9dc62c8e7443fc321e9d09902e946;p=thirdparty%2Fkernel%2Fstable.git

Revert "LoongArch: KVM: Invalidate guest steal time address on vCPU reset"

This reverts commit 05969a6944713f159e8f28be2388500174521818 which is
commit 4956e07f05e239b274d042618a250c9fa3e92629 upstream.

LoongArch's PV steal time support is add after 6.10, so 6.10.y doesn't
need this fix.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h
index d741c3e9933a5..590a92cb54165 100644
--- a/arch/loongarch/include/asm/kvm_vcpu.h
+++ b/arch/loongarch/include/asm/kvm_vcpu.h
@@ -76,6 +76,7 @@ static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { }
 #endif
 
 void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
+void kvm_reset_timer(struct kvm_vcpu *vcpu);
 void kvm_save_timer(struct kvm_vcpu *vcpu);
 void kvm_restore_timer(struct kvm_vcpu *vcpu);
 
diff --git a/arch/loongarch/kvm/timer.c b/arch/loongarch/kvm/timer.c
index 74a4b5c272d60..bcc6b6d063d91 100644
--- a/arch/loongarch/kvm/timer.c
+++ b/arch/loongarch/kvm/timer.c
@@ -188,3 +188,10 @@ void kvm_save_timer(struct kvm_vcpu *vcpu)
 	kvm_save_hw_gcsr(csr, LOONGARCH_CSR_ESTAT);
 	preempt_enable();
 }
+
+void kvm_reset_timer(struct kvm_vcpu *vcpu)
+{
+	write_gcsr_timercfg(0);
+	kvm_write_sw_gcsr(vcpu->arch.csr, LOONGARCH_CSR_TCFG, 0);
+	hrtimer_cancel(&vcpu->arch.swtimer);
+}
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 0b53f4d9fddf9..9e8030d451290 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -572,7 +572,7 @@ static int kvm_set_one_reg(struct kvm_vcpu *vcpu,
 				vcpu->kvm->arch.time_offset = (signed long)(v - drdtime());
 			break;
 		case KVM_REG_LOONGARCH_VCPU_RESET:
-			vcpu->arch.st.guest_addr = 0;
+			kvm_reset_timer(vcpu);
 			memset(&vcpu->arch.irq_pending, 0, sizeof(vcpu->arch.irq_pending));
 			memset(&vcpu->arch.irq_clear, 0, sizeof(vcpu->arch.irq_clear));
 			break;