From: Anup Patel <apatel@ventanamicro.com>
To: Atish Patra <atish.patra@linux.dev>
Cc: Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Alexandre Ghiti <alex@ghiti.fr>,
	Andrew Jones <ajones@ventanamicro.com>,
	Anup Patel <anup@brainfault.org>,
	kvm@vger.kernel.org,
	kvm-riscv@lists.infradead.org,
	linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Anup Patel <apatel@ventanamicro.com>,
	Atish Patra <atishp@rivosinc.com>
Subject: [PATCH v2 04/12] RISC-V: KVM: Replace KVM_REQ_HFENCE_GVMA_VMID_ALL with KVM_REQ_TLB_FLUSH
Date: Fri, 13 Jun 2025 12:27:35 +0530
Message-ID: <20250613065743.737102-5-apatel@ventanamicro.com>
In-Reply-To: <20250613065743.737102-1-apatel@ventanamicro.com>
References: <20250613065743.737102-1-apatel@ventanamicro.com>
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The KVM_REQ_HFENCE_GVMA_VMID_ALL is same as KVM_REQ_TLB_FLUSH so
to avoid confusion let's replace KVM_REQ_HFENCE_GVMA_VMID_ALL with
KVM_REQ_TLB_FLUSH. Also, rename kvm_riscv_hfence_gvma_vmid_all_process()
to kvm_riscv_tlb_flush_process().

Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 arch/riscv/include/asm/kvm_host.h | 4 ++--
 arch/riscv/kvm/tlb.c              | 8 ++++----
 arch/riscv/kvm/vcpu.c             | 8 ++------
 3 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h
index 8aa705ac75a5..ff1f76d6f177 100644
--- a/arch/riscv/include/asm/kvm_host.h
+++ b/arch/riscv/include/asm/kvm_host.h
@@ -37,7 +37,6 @@
 #define KVM_REQ_UPDATE_HGATP		KVM_ARCH_REQ(2)
 #define KVM_REQ_FENCE_I			\
 	KVM_ARCH_REQ_FLAGS(3, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
-#define KVM_REQ_HFENCE_GVMA_VMID_ALL	KVM_REQ_TLB_FLUSH
 #define KVM_REQ_HFENCE_VVMA_ALL		\
 	KVM_ARCH_REQ_FLAGS(4, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
 #define KVM_REQ_HFENCE			\
@@ -331,8 +330,9 @@ void kvm_riscv_local_hfence_vvma_gva(unsigned long vmid,
 				     unsigned long order);
 void kvm_riscv_local_hfence_vvma_all(unsigned long vmid);
 
+void kvm_riscv_tlb_flush_process(struct kvm_vcpu *vcpu);
+
 void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu);
-void kvm_riscv_hfence_gvma_vmid_all_process(struct kvm_vcpu *vcpu);
 void kvm_riscv_hfence_vvma_all_process(struct kvm_vcpu *vcpu);
 void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu);
 
diff --git a/arch/riscv/kvm/tlb.c b/arch/riscv/kvm/tlb.c
index b3461bfd9756..da98ca801d31 100644
--- a/arch/riscv/kvm/tlb.c
+++ b/arch/riscv/kvm/tlb.c
@@ -162,7 +162,7 @@ void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu)
 	local_flush_icache_all();
 }
 
-void kvm_riscv_hfence_gvma_vmid_all_process(struct kvm_vcpu *vcpu)
+void kvm_riscv_tlb_flush_process(struct kvm_vcpu *vcpu)
 {
 	struct kvm_vmid *v = &vcpu->kvm->arch.vmid;
 	unsigned long vmid = READ_ONCE(v->vmid);
@@ -342,14 +342,14 @@ void kvm_riscv_hfence_gvma_vmid_gpa(struct kvm *kvm,
 	data.size = gpsz;
 	data.order = order;
 	make_xfence_request(kvm, hbase, hmask, KVM_REQ_HFENCE,
-			    KVM_REQ_HFENCE_GVMA_VMID_ALL, &data);
+			    KVM_REQ_TLB_FLUSH, &data);
 }
 
 void kvm_riscv_hfence_gvma_vmid_all(struct kvm *kvm,
 				    unsigned long hbase, unsigned long hmask)
 {
-	make_xfence_request(kvm, hbase, hmask, KVM_REQ_HFENCE_GVMA_VMID_ALL,
-			    KVM_REQ_HFENCE_GVMA_VMID_ALL, NULL);
+	make_xfence_request(kvm, hbase, hmask, KVM_REQ_TLB_FLUSH,
+			    KVM_REQ_TLB_FLUSH, NULL);
 }
 
 void kvm_riscv_hfence_vvma_asid_gva(struct kvm *kvm,
diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
index a2dd4161e5a4..6eb11c913b13 100644
--- a/arch/riscv/kvm/vcpu.c
+++ b/arch/riscv/kvm/vcpu.c
@@ -721,12 +721,8 @@ static void kvm_riscv_check_vcpu_requests(struct kvm_vcpu *vcpu)
 		if (kvm_check_request(KVM_REQ_FENCE_I, vcpu))
 			kvm_riscv_fence_i_process(vcpu);
 
-		/*
-		 * The generic KVM_REQ_TLB_FLUSH is same as
-		 * KVM_REQ_HFENCE_GVMA_VMID_ALL
-		 */
-		if (kvm_check_request(KVM_REQ_HFENCE_GVMA_VMID_ALL, vcpu))
-			kvm_riscv_hfence_gvma_vmid_all_process(vcpu);
+		if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
+			kvm_riscv_tlb_flush_process(vcpu);
 
 		if (kvm_check_request(KVM_REQ_HFENCE_VVMA_ALL, vcpu))
 			kvm_riscv_hfence_vvma_all_process(vcpu);
-- 
2.43.0