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Sat, 20 Sep 2025 13:39:15 -0700 (PDT) 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: jgg@nvidia.com, zong.li@sifive.com, tjeznach@rivosinc.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, anup@brainfault.org, atish.patra@linux.dev, tglx@linutronix.de, alex.williamson@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, alex@ghiti.fr Subject: [RFC PATCH v2 18/18] DO NOT UPSTREAM: RISC-V: KVM: Workaround kvm_riscv_gstage_ioremap() bug Date: Sat, 20 Sep 2025 15:39:08 -0500 Message-ID: <20250920203851.2205115-38-ajones@ventanamicro.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250920203851.2205115-20-ajones@ventanamicro.com> References: <20250920203851.2205115-20-ajones@ventanamicro.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Workaround a bug that breaks guest booting with device assignment that was introduced with commit 9bca8be646e0 ("RISC-V: KVM: Fix pte settings within kvm_riscv_gstage_ioremap()") --- arch/riscv/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 525fb5a330c0..994f18b92143 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -56,7 +56,7 @@ int kvm_riscv_mmu_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa, end = (gpa + size + PAGE_SIZE - 1) & PAGE_MASK; pfn = __phys_to_pfn(hpa); - prot = pgprot_noncached(PAGE_WRITE); + prot = pgprot_noncached(__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_READ | _PAGE_WRITE)); for (addr = gpa; addr < end; addr += PAGE_SIZE) { map.addr = addr; -- 2.49.0