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GET /api/1.0/patches/2175736/?format=api
{ "id": 2175736, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2175736/?format=api", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.0/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20251218200353.301866-5-calebs@linux.ibm.com>", "date": "2025-12-18T20:03:53", "name": "[4/4] ppc/pnv: Add OCC FLAG registers", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9de0d04b118ea53f7b2f234192c82cd1d365c7be", "submitter": { "id": 90855, "url": "http://patchwork.ozlabs.org/api/1.0/people/90855/?format=api", "name": "Caleb Schlossin", "email": "calebs@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20251218200353.301866-5-calebs@linux.ibm.com/mbox/", "series": [ { "id": 485910, "url": "http://patchwork.ozlabs.org/api/1.0/series/485910/?format=api", "date": "2025-12-18T20:03:50", "name": "Power10 PowerVM bringup fixes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/485910/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2175736/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=Mx0YuxQG;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org 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"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "OCCFLG are scratch registers that can be shared with OCC firmware.\nLog reads and writes to the registers as a reminder when we run\ninto more OCC code.\n\nAdd RW, WO_CLEAR and WO_OR SCOM Type enums in pnv_occ.c\n\nSigned-off-by: Chalapathi V <chalapathi.v@linux.ibm.com>\nSigned-off-by: Caleb Schlossin <calebs@linux.ibm.com>\n---\n hw/ppc/pnv_occ.c | 55 +++++++++++++++++++++++++++++++++++++---\n include/hw/ppc/pnv_occ.h | 4 +++\n 2 files changed, 56 insertions(+), 3 deletions(-)", "diff": "diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c\nindex 24b789c191..e605ae0fbc 100644\n--- a/hw/ppc/pnv_occ.c\n+++ b/hw/ppc/pnv_occ.c\n@@ -195,6 +195,49 @@ static const TypeInfo pnv_occ_power8_type_info = {\n #define P9_OCB_OCI_OCCMISC_CLEAR 0x6081\n #define P9_OCB_OCI_OCCMISC_OR 0x6082\n \n+/* OCC scratch registers for flag setting */\n+#define P9_OCCFLG0 0x60ac\n+#define P9_OCCFLG7_OR 0x60c3\n+\n+enum ScomType {\n+ SCOM_TYPE_RW = 0,\n+ SCOM_TYPE_WO_CLEAR = 1,\n+ SCOM_TYPE_WO_OR = 2,\n+};\n+\n+static void rw_occ_flag_regs(PnvOCC *occ, uint32_t offset, bool read,\n+ uint64_t *val)\n+{\n+ int flag_num;\n+ int flag_type;\n+\n+ /*\n+ * Each OCCFLG register has SCOM0 - RW, SCOM1 - WO_CLEAR, SCOM2 - WO_OR\n+ * hence devide by 3 to get flag index and mod 3 to get SCOM type.\n+ */\n+ flag_num = (offset - P9_OCCFLG0) / 3;\n+ flag_type = (offset - P9_OCCFLG0) % 3;\n+\n+ if (read) {\n+ if (flag_type) {\n+ qemu_log_mask(LOG_GUEST_ERROR, \"OCC: Write only register: Ox%\"\n+ PRIx32 \"\\n\", offset);\n+ return;\n+ }\n+ *val = occ->occflags[flag_num];\n+ } else {\n+ switch (flag_type) {\n+ case SCOM_TYPE_RW:\n+ occ->occflags[flag_num] = *val;\n+ break;\n+ case SCOM_TYPE_WO_CLEAR:\n+ occ->occflags[flag_num] &= ~(*val);\n+ break;\n+ case SCOM_TYPE_WO_OR:\n+ occ->occflags[flag_num] |= *val;\n+ }\n+ }\n+}\n \n static uint64_t pnv_occ_power9_xscom_read(void *opaque, hwaddr addr,\n unsigned size)\n@@ -207,8 +250,11 @@ static uint64_t pnv_occ_power9_xscom_read(void *opaque, hwaddr addr,\n case P9_OCB_OCI_OCCMISC:\n val = occ->occmisc;\n break;\n+ case P9_OCCFLG0 ... P9_OCCFLG7_OR:\n+ rw_occ_flag_regs(occ, offset, 1, &val);\n+ break;\n default:\n- qemu_log_mask(LOG_UNIMP, \"OCC Unimplemented register: Ox%\"\n+ qemu_log_mask(LOG_UNIMP, \"OCC Unimplemented register read: Ox%\"\n HWADDR_PRIx \"\\n\", addr >> 3);\n }\n return val;\n@@ -229,9 +275,12 @@ static void pnv_occ_power9_xscom_write(void *opaque, hwaddr addr,\n break;\n case P9_OCB_OCI_OCCMISC:\n pnv_occ_set_misc(occ, val);\n- break;\n+ break;\n+ case P9_OCCFLG0 ... P9_OCCFLG7_OR:\n+ rw_occ_flag_regs(occ, offset, 0, &val);\n+ break;\n default:\n- qemu_log_mask(LOG_UNIMP, \"OCC Unimplemented register: Ox%\"\n+ qemu_log_mask(LOG_UNIMP, \"OCC Unimplemented register write: Ox%\"\n HWADDR_PRIx \"\\n\", addr >> 3);\n }\n }\ndiff --git a/include/hw/ppc/pnv_occ.h b/include/hw/ppc/pnv_occ.h\nindex 013ea2e53e..8c9f1416eb 100644\n--- a/include/hw/ppc/pnv_occ.h\n+++ b/include/hw/ppc/pnv_occ.h\n@@ -47,6 +47,10 @@ struct PnvOCC {\n /* OCC Misc interrupt */\n uint64_t occmisc;\n \n+ /* OCC Flags */\n+#define NR_FLAG_REGS 8\n+ uint32_t occflags[NR_FLAG_REGS];\n+\n qemu_irq psi_irq;\n \n /* OCCs operate on regions of HOMER memory */\n", "prefixes": [ "4/4" ] }