linux-kernel - [PATCH 2/3] LoongArch: KVM: Remove duplicated cache attribute setting

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Message-Id: <20250207032634.2333300-3-maobibo@loongson.cn>
Date: Fri,  7 Feb 2025 11:26:33 +0800
From: Bibo Mao <maobibo@...ngson.cn>
To: Tianrui Zhao <zhaotianrui@...ngson.cn>
Cc: Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	kvm@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] LoongArch: KVM: Remove duplicated cache attribute setting

Cache attribute comes from GPA->HPA secondary mmu page table and is
configured when kvm is enabled. It is the same for all VMs, remove
duplicated cache attribute setting on vCPU context switch.

Signed-off-by: Bibo Mao <maobibo@...ngson.cn>
---
 arch/loongarch/kvm/vcpu.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index fb72095c8077..20f941af3e9e 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -1548,9 +1548,6 @@ static int _kvm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 
 	/* Restore timer state regardless */
 	kvm_restore_timer(vcpu);
-
-	/* Control guest page CCA attribute */
-	change_csr_gcfg(CSR_GCFG_MATC_MASK, CSR_GCFG_MATC_ROOT);
 	kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
 
 	/* Restore hardware PMU CSRs */
-- 
2.39.3