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Wed, 19 Apr 2023 15:24:11 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id e4-20020a170902744400b001a681fb3e77sm11867810plt.44.2023.04.19.15.24.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 15:24:11 -0700 (PDT) From: Atish Patra To: linux-kernel@vger.kernel.org Cc: Atish Patra , Alexandre Ghiti , Andrew Jones , Andrew Morton , Anup Patel , Atish Patra , Suzuki K Poulose , Will Deacon , Marc Zyngier , Sean Christopherson , linux-coco@lists.linux.dev, Dylan Reid , abrestic@rivosinc.com, Samuel Ortiz , Jiri Slaby , kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, Palmer Dabbelt , Paolo Bonzini , Rajnesh Kanwal , Uladzislau Rezki Subject: [RFC kvmtool 05/10] riscv: Do not create APLIC for TVMs Date: Wed, 19 Apr 2023 15:23:45 -0700 Message-Id: <20230419222350.3604274-6-atishp@rivosinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230419222350.3604274-1-atishp@rivosinc.com> References: <20230419222350.3604274-1-atishp@rivosinc.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230419_232621_192342_1A8B1DE8 X-CRM114-Status: GOOD ( 12.20 ) X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "desiato.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: The CoVE VMs do not support wired interrupts. Thus no need of APLIC at this point. Signed-off-by: Atish Patra --- riscv/aia.c | 31 +++++++++++++++++++++ 1 file changed, 21 insertions(+), 10 deletions(-) Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:630 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: kvm-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kvm-riscv" Errors-To: kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org The CoVE VMs do not support wired interrupts. Thus no need of APLIC at this point. Signed-off-by: Atish Patra --- riscv/aia.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) diff --git a/riscv/aia.c b/riscv/aia.c index 8c85b3f..a3b8618 100644 --- a/riscv/aia.c +++ b/riscv/aia.c @@ -143,6 +143,11 @@ static int aia__init(struct kvm *kvm) .attr = KVM_DEV_RISCV_AIA_CTRL_INIT, }; + + /* CoVE VM only supports hardware with physical guest interrupt file */ + if (kvm->cfg.arch.cove_vm) + aia_mode = KVM_DEV_RISCV_AIA_MODE_HWACCEL; + /* Setup global device attribute variables */ aia_mode_attr.addr = (u64)(unsigned long)&aia_mode; aia_nr_ids_attr.addr = (u64)(unsigned long)&aia_nr_ids; @@ -160,10 +165,7 @@ static int aia__init(struct kvm *kvm) ret = ioctl(aia_fd, KVM_GET_DEVICE_ATTR, &aia_nr_ids_attr); if (ret) return ret; - aia_nr_sources = irq__get_nr_allocated_lines(); - ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_nr_sources_attr); - if (ret) - return ret; + aia_hart_bits = fls_long(kvm->nrcpus); ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_hart_bits_attr); if (ret) @@ -172,12 +174,21 @@ static int aia__init(struct kvm *kvm) /* Save number of HARTs for FDT generation */ aia_nr_harts = kvm->nrcpus; - /* Set AIA device addresses */ - aia_addr = AIA_APLIC_ADDR(aia_nr_harts); - aia_addr_attr.attr = KVM_DEV_RISCV_AIA_ADDR_APLIC; - ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_addr_attr); - if (ret) - return ret; + /* CoVE VMs do not support APLIC yet */ + if (!kvm->cfg.arch.cove_vm) { + aia_nr_sources = irq__get_nr_allocated_lines(); + ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_nr_sources_attr); + if (ret) + return ret; + + /* Set AIA device addresses */ + aia_addr = AIA_APLIC_ADDR(aia_nr_harts); + aia_addr_attr.attr = KVM_DEV_RISCV_AIA_ADDR_APLIC; + ret = ioctl(aia_fd, KVM_SET_DEVICE_ATTR, &aia_addr_attr); + if (ret) + return ret; + } + for (i = 0; i < kvm->nrcpus; i++) { aia_addr = AIA_IMSIC_ADDR(i); aia_addr_attr.attr = KVM_DEV_RISCV_AIA_ADDR_IMSIC(i);