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Mon, 09 Dec 2024 19:05:14 -0800 (PST) From: Nicholas Piggin To: qemu-ppc@nongnu.org Cc: Nicholas Piggin , qemu-devel@nongnu.org, Harsh Prateek Bora , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Barrat?= Subject: [PATCH 5/9] ppc/pnv/occ: Better document OCCMISC bits Date: Tue, 10 Dec 2024 13:04:45 +1000 Message-ID: <20241210030451.1306608-6-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241210030451.1306608-1-npiggin@gmail.com> References: <20241210030451.1306608-1-npiggin@gmail.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::62d; envelope-from=npiggin@gmail.com; helo=mail-pl1-x62d.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: 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 @gmail.com) X-ZM-MESSAGEID: 1733800001554116600 Content-Type: text/plain; charset="utf-8" Use defines for the OCCMISC register bits, and add a comment about the IRQ request bit, which QEMU may not model quite correctly. Signed-off-by: Nicholas Piggin --- hw/ppc/pnv_occ.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c index c6681a035a7..5424d87ee97 100644 --- a/hw/ppc/pnv_occ.c +++ b/hw/ppc/pnv_occ.c @@ -30,6 +30,7 @@ #define OCB_OCI_OCCMISC 0x4020 #define OCB_OCI_OCCMISC_AND 0x4021 #define OCB_OCI_OCCMISC_OR 0x4022 +#define OCCMISC_PSI_IRQ PPC_BIT(0) =20 /* OCC sensors */ #define OCC_SENSOR_DATA_BLOCK_OFFSET 0x0000 @@ -50,13 +51,16 @@ =20 static void pnv_occ_set_misc(PnvOCC *occ, uint64_t val) { - bool irq_state; - - val &=3D 0xffff000000000000ull; + val &=3D PPC_BITMASK(0, 18); /* Mask out unimplemented bits */ =20 occ->occmisc =3D val; - irq_state =3D !!(val >> 63); - qemu_set_irq(occ->psi_irq, irq_state); + + /* + * OCCMISC IRQ bit triggers the interrupt on a 0->1 edge, but not clear + * how that is handled in PSI so it is level-triggered here, which is = not + * really correct (but skiboot is okay with it). + */ + qemu_set_irq(occ->psi_irq, !!(val & OCCMISC_PSI_IRQ)); } =20 static uint64_t pnv_occ_power8_xscom_read(void *opaque, hwaddr addr, --=20 2.45.2