linux-kernel - [PATCH 2/6] RISC-V: KVM: Add common kvm_riscv_vcpu_sbi_system

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Date:   Tue,  1 Feb 2022 13:52:23 +0530
From:   Anup Patel <apatel@...tanamicro.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Atish Patra <atishp@...shpatra.org>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alistair Francis <Alistair.Francis@....com>,
        Anup Patel <anup@...infault.org>, kvm@...r.kernel.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH 2/6] RISC-V: KVM: Add common kvm_riscv_vcpu_sbi_system_reset() function

We rename kvm_sbi_system_shutdown() to kvm_riscv_vcpu_sbi_system_reset()
and move it to vcpu_sbi.c so that it can be shared by SBI v0.1 shutdown
and SBI v0.3 SRST extension.

Signed-off-by: Anup Patel <apatel@...tanamicro.com>
---
 arch/riscv/include/asm/kvm_vcpu_sbi.h |  3 +++
 arch/riscv/kvm/vcpu_sbi.c             | 17 +++++++++++++++++
 arch/riscv/kvm/vcpu_sbi_v01.c         | 18 ++----------------
 3 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/asm/kvm_vcpu_sbi.h
index 04cd81f2ab5b..83d6d4d2b1df 100644
--- a/arch/riscv/include/asm/kvm_vcpu_sbi.h
+++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h
@@ -28,6 +28,9 @@ struct kvm_vcpu_sbi_extension {
 };
 
 void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run);
+void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
+				     struct kvm_run *run,
+				     u32 type, u64 flags);
 const struct kvm_vcpu_sbi_extension *kvm_vcpu_sbi_find_ext(unsigned long extid);
 
 #endif /* __RISCV_KVM_VCPU_SBI_H__ */
diff --git a/arch/riscv/kvm/vcpu_sbi.c b/arch/riscv/kvm/vcpu_sbi.c
index 78aa3db76225..11ae4f621f0d 100644
--- a/arch/riscv/kvm/vcpu_sbi.c
+++ b/arch/riscv/kvm/vcpu_sbi.c
@@ -79,6 +79,23 @@ void kvm_riscv_vcpu_sbi_forward(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	run->riscv_sbi.ret[1] = cp->a1;
 }
 
+void kvm_riscv_vcpu_sbi_system_reset(struct kvm_vcpu *vcpu,
+				     struct kvm_run *run,
+				     u32 type, u64 flags)
+{
+	unsigned long i;
+	struct kvm_vcpu *tmp;
+
+	kvm_for_each_vcpu(i, tmp, vcpu->kvm)
+		tmp->arch.power_off = true;
+	kvm_make_all_cpus_request(vcpu->kvm, KVM_REQ_SLEEP);
+
+	memset(&run->system_event, 0, sizeof(run->system_event));
+	run->system_event.type = type;
+	run->system_event.flags = flags;
+	run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
+}
+
 int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run)
 {
 	struct kvm_cpu_context *cp = &vcpu->arch.guest_context;
diff --git a/arch/riscv/kvm/vcpu_sbi_v01.c b/arch/riscv/kvm/vcpu_sbi_v01.c
index 2ab52b6d9ed3..da4d6c99c2cf 100644
--- a/arch/riscv/kvm/vcpu_sbi_v01.c
+++ b/arch/riscv/kvm/vcpu_sbi_v01.c
@@ -14,21 +14,6 @@
 #include <asm/kvm_vcpu_timer.h>
 #include <asm/kvm_vcpu_sbi.h>
 
-static void kvm_sbi_system_shutdown(struct kvm_vcpu *vcpu,
-				    struct kvm_run *run, u32 type)
-{
-	unsigned long i;
-	struct kvm_vcpu *tmp;
-
-	kvm_for_each_vcpu(i, tmp, vcpu->kvm)
-		tmp->arch.power_off = true;
-	kvm_make_all_cpus_request(vcpu->kvm, KVM_REQ_SLEEP);
-
-	memset(&run->system_event, 0, sizeof(run->system_event));
-	run->system_event.type = type;
-	run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
-}
-
 static int kvm_sbi_ext_v01_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
 				      unsigned long *out_val,
 				      struct kvm_cpu_trap *utrap,
@@ -80,7 +65,8 @@ static int kvm_sbi_ext_v01_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		}
 		break;
 	case SBI_EXT_0_1_SHUTDOWN:
-		kvm_sbi_system_shutdown(vcpu, run, KVM_SYSTEM_EVENT_SHUTDOWN);
+		kvm_riscv_vcpu_sbi_system_reset(vcpu, run,
+						KVM_SYSTEM_EVENT_SHUTDOWN, 0);
 		*exit = true;
 		break;
 	case SBI_EXT_0_1_REMOTE_FENCE_I:
-- 
2.25.1