linux-kernel - [PATCH v3 1/2] RISC-V: KVM: Fix privilege mode setting in kvm_riscv_vcpu_trap

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Date:   Sat, 28 Jan 2023 13:58:46 +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>,
        Andrew Jones <ajones@...tanamicro.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 v3 1/2] RISC-V: KVM: Fix privilege mode setting in kvm_riscv_vcpu_trap_redirect()

The kvm_riscv_vcpu_trap_redirect() should set guest privilege mode
to supervisor mode because guest traps/interrupts are always handled
in virtual supervisor mode.

Fixes: 9f7013265112 ("RISC-V: KVM: Handle MMIO exits for VCPU")
Signed-off-by: Anup Patel <apatel@...tanamicro.com>
---
 arch/riscv/kvm/vcpu_exit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
index c9f741ab26f5..af7c4bc07929 100644
--- a/arch/riscv/kvm/vcpu_exit.c
+++ b/arch/riscv/kvm/vcpu_exit.c
@@ -160,6 +160,9 @@ void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
 
 	/* Set Guest PC to Guest exception vector */
 	vcpu->arch.guest_context.sepc = csr_read(CSR_VSTVEC);
+
+	/* Set Guest privilege mode to supervisor */
+	vcpu->arch.guest_context.sstatus |= SR_SPP;
 }
 
 /*
-- 
2.34.1