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[2001:1ae9:1c2:4c00:20f:c6b4:1e57:7965]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-432dac1f409sm24906005e9.37.2024.11.14.08.18.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Nov 2024 08:18:50 -0800 (PST) From: Andrew Jones To: iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: tjeznach@rivosinc.com, zong.li@sifive.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, anup@brainfault.org, atishp@atishpatra.org, tglx@linutronix.de, alex.williamson@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Subject: [RFC PATCH 03/15] irqchip/riscv-imsic: Add support for DOMAIN_BUS_MSI_REMAP Date: Thu, 14 Nov 2024 17:18:48 +0100 Message-ID: <20241114161845.502027-20-ajones@ventanamicro.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241114161845.502027-17-ajones@ventanamicro.com> References: <20241114161845.502027-17-ajones@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241114_081853_446600_416F332B X-CRM114-Status: UNSURE ( 9.99 ) 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Unlike a child of an MSI NEXUS domain, a child of an MSI_REMAP domain will not invoke init_dev_msi_info() with 'domain' equal to 'msi_parent_domain'. This is because the MSI_REMAP domain implements init_dev_msi_info() with msi_parent_init_dev_msi_info(), which makes 'domain' point to the NEXUS (IMSIC) domain, while keeping 'msi_parent_domain' pointing to itself. The rest of the IMSIC init_dev_msi_info() implementation works for MSI_REMAP domains, though, so there's nothing to do to add support except accept the token. Signed-off-by: Andrew Jones --- drivers/irqchip/irq-riscv-imsic-platform.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/irqchip/irq-riscv-imsic-platform.c b/drivers/irqchip/irq-riscv-imsic-platform.c index 5d7c30ad8855..6a7d7fefda6a 100644 --- a/drivers/irqchip/irq-riscv-imsic-platform.c +++ b/drivers/irqchip/irq-riscv-imsic-platform.c @@ -246,6 +246,8 @@ static bool imsic_init_dev_msi_info(struct device *dev, case DOMAIN_BUS_NEXUS: if (WARN_ON_ONCE(domain != real_parent)) return false; + fallthrough; + case DOMAIN_BUS_MSI_REMAP: #ifdef CONFIG_SMP info->chip->irq_set_affinity = irq_chip_set_affinity_parent; #endif