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Sun, 05 Jul 2026 19:21:44 -0700 (PDT) Received: from localhost ([2001:da8:7001:11::cb]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2cad776516dsm39837995ad.52.2026.07.05.19.21.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jul 2026 19:21:44 -0700 (PDT) From: Inochi Amaoto To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Anup Patel , Atish Patra , Paolo Bonzini , Shuah Khan , Charlie Jenkins , Sergey Matyukevich , Thomas Huth , Inochi Amaoto , Deepak Gupta Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, Yixun Lan , Longbin Li , Quan Zhou Subject: [PATCH v5 5/8] RISC-V: KVM: Handle software-check exits for VCPU Date: Mon, 6 Jul 2026 10:20:41 +0800 Message-ID: <20260706022046.214956-6-inochiama@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260706022046.214956-1-inochiama@gmail.com> References: <20260706022046.214956-1-inochiama@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260705_192145_389141_93CC97C3 X-CRM114-Status: UNSURE ( 9.22 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The extension Zicfiss/Zicfilp introduces a software-check exception to the privilege architecture. Delegate this exception to VS mode when vCPU enable Zicfiss/Zicfilp so the CFI violations in VU/VS could be reported. Assisted-by: YuanSheng:claude-4.7-opus Co-developed-by: Quan Zhou Signed-off-by: Quan Zhou Signed-off-by: Inochi Amaoto --- arch/riscv/include/asm/csr.h | 1 + arch/riscv/kvm/vcpu_exit.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 31b8988f4488..224af9facf1f 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -117,6 +117,7 @@ #define EXC_INST_PAGE_FAULT 12 #define EXC_LOAD_PAGE_FAULT 13 #define EXC_STORE_PAGE_FAULT 15 +#define EXC_SOFTWARE_CHECK 18 #define EXC_INST_GUEST_PAGE_FAULT 20 #define EXC_LOAD_GUEST_PAGE_FAULT 21 #define EXC_VIRTUAL_INST_FAULT 22 diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c index 0bb0c51e3c89..12eebeabdf14 100644 --- a/arch/riscv/kvm/vcpu_exit.c +++ b/arch/riscv/kvm/vcpu_exit.c @@ -243,6 +243,10 @@ int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, run->exit_reason = KVM_EXIT_DEBUG; ret = 0; break; + case EXC_SOFTWARE_CHECK: + if (vcpu->arch.cfg.henvcfg & (ENVCFG_LPE | ENVCFG_SSE)) + ret = vcpu_redirect(vcpu, trap); + break; default: break; } -- 2.55.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv