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Tue, 24 Mar 2026 22:03:13 -0700 (PDT) From: Jay Chang To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: Palmer Dabbelt , Alistair Francis , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei , Chao Liu , Jay Chang , Frank Chang , Nutty Liu Subject: [PATCH v2 2/2] hw/riscv/riscv-iommu: Add IPSR.PMIP RW1C support Date: Wed, 25 Mar 2026 13:00:11 +0800 Message-ID: <20260325050011.66722-3-jay.chang@sifive.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20260325050011.66722-1-jay.chang@sifive.com> References: <20260325050011.66722-1-jay.chang@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1033; envelope-from=jay.chang@sifive.com; helo=mail-pj1-x1033.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @sifive.com) X-ZM-MESSAGEID: 1774415022378154100 Content-Type: text/plain; charset="utf-8" Add proper RW1C (Read/Write 1 to Clear) support for the IPSR.PMIP (Performance Monitor Interrupt Pending) bit, which was missing from the IPSR register implementation. Signed-off-by: Jay Chang Reviewed-by: Frank Chang Reviewed-by: Nutty Liu Reviewed-by: Chao Liu --- hw/riscv/riscv-iommu-bits.h | 1 + hw/riscv/riscv-iommu.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/hw/riscv/riscv-iommu-bits.h b/hw/riscv/riscv-iommu-bits.h index 47fe01bee5..a938fd3eb4 100644 --- a/hw/riscv/riscv-iommu-bits.h +++ b/hw/riscv/riscv-iommu-bits.h @@ -189,6 +189,7 @@ enum riscv_iommu_ddtp_modes { #define RISCV_IOMMU_REG_IPSR 0x0054 #define RISCV_IOMMU_IPSR_CIP BIT(0) #define RISCV_IOMMU_IPSR_FIP BIT(1) +#define RISCV_IOMMU_IPSR_PMIP BIT(2) #define RISCV_IOMMU_IPSR_PIP BIT(3) =20 enum { diff --git a/hw/riscv/riscv-iommu.c b/hw/riscv/riscv-iommu.c index 225394ea83..f8b5187328 100644 --- a/hw/riscv/riscv-iommu.c +++ b/hw/riscv/riscv-iommu.c @@ -2153,6 +2153,10 @@ static void riscv_iommu_update_ipsr(RISCVIOMMUState = *s, uint64_t data) ipsr_clr |=3D RISCV_IOMMU_IPSR_FIP; } =20 + if (!(data & RISCV_IOMMU_IPSR_PMIP)) { + ipsr_clr |=3D RISCV_IOMMU_IPSR_PMIP; + } + if (data & RISCV_IOMMU_IPSR_PIP) { pqcsr =3D riscv_iommu_reg_get32(s, RISCV_IOMMU_REG_PQCSR); =20 --=20 2.48.1