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charset="utf-8" Power Hypervisor code requires access to the SECURITY_SWITCH XSCOM register at MMIO address 0x80028 (scom address 0x10005). Adding basic read support for now so that is doesn't cause error messages to be posted. Reviewed-by: Chalapathi V Reviewed-by: Glenn Miles Reviewed-by: Aditya Gupta Signed-off-by: Glenn Miles Signed-off-by: Caleb Schlossin --- hw/ppc/pnv_xscom.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/ppc/pnv_xscom.c b/hw/ppc/pnv_xscom.c index 8557b560ae..dc1ffc6c01 100644 --- a/hw/ppc/pnv_xscom.c +++ b/hw/ppc/pnv_xscom.c @@ -61,6 +61,8 @@ static uint32_t pnv_xscom_pcba(PnvChip *chip, uint64_t ad= dr) static uint64_t xscom_read_default(PnvChip *chip, uint32_t pcba) { switch (pcba) { + case 0x10005: /* SECURITY SWITCH */ + return 0; case 0xf000f: return PNV_CHIP_GET_CLASS(chip)->chip_cfam_id; case 0x18002: /* ECID2 */ --=20 2.47.3 From nobody Sat Feb 7 08:27:57 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; 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Mon, 26 Jan 2026 13:55:18 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9064358043; Mon, 26 Jan 2026 13:55:17 +0000 (GMT) Received: from gfwr532.rchland.ibm.com (unknown [9.10.239.133]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 26 Jan 2026 13:55:17 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=Bb3R9S5Eyh4QGX9eA SkCXJT7BToT8CAoPaDCMpQpnP8=; b=pAXb+KcCiV6WTG0Xcl28XznIp2uxs/f0g /b2o2Ho7OulhuCCBvQHnl337fXJPhI5fHadBFTwWkZ6Z0Oola6XiC/gdCptmQJSE kZ0612dj4ycKXbRnd+2WLbqSe5y/DwWTKXm7f/PKjao4q5ZLZaC0UIP9bPR2JwbE 7x5/3qW0adNZfQscTehyP04Bt63ZXWjgux0ICU2u7gQaPenIqOdTp9IPTy9C413v J7MXu5ZwNiHlf3CbXh8rXO7Kcz6pMIrj9+CALQCdAFN2wAhvuStKw9SvHcfLOvJ/ T6KKB3zKZSDsp2SVPphurHYVwN7n8RS63DzgzCd9LFNjxrvNh3oBg== From: Caleb Schlossin To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, npiggin@gmail.com, adityag@linux.ibm.com, milesg@linux.ibm.com, chalapathi.v@linux.ibm.com, harshpb@linux.ibm.com, calebs@linux.ibm.com Subject: [PATCH v2 2/3] ppc/pnv: Add unimplemented quad and core regs Date: Mon, 26 Jan 2026 07:55:06 -0600 Message-ID: <20260126135507.771552-3-calebs@linux.ibm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260126135507.771552-1-calebs@linux.ibm.com> References: <20260126135507.771552-1-calebs@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Gr1PO01C c=1 sm=1 tr=0 ts=69777248 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=eGgGPLgfgt7bj44kCrMA:9 X-Proofpoint-GUID: 6YrtJisGa0wSO5yUsO7YcZpbZAX0Wm33 X-Proofpoint-ORIG-GUID: 5balorqg7AGHA-qbIB_RuEmtODvpaHUL X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI2MDExNyBTYWx0ZWRfX8BXAn2NmqLpd 3FAeOW2SJNx9dhIflRH63FueQUYrSPlcoJUA8zdS4XK9g0nrcpZySlmbQTcts2II/wzilwiHRnf lZc85WI894utt2D75GwB7cXyQYm+LhfiLyV1xMh8Un133G0OZASNlps3yr4WlVkjF8jpUDoH5xT J5Nfzy5jRUhsUqBq3D8SBgCLeRAMujevyomEi3HVmJRBwb9vbg7N+ydbPx6+b4BdrzwN8OzDX+D rfV2MzfIa2x2djcdikFTOO1RqWm59IXBDoOJA897/k5eo7Ohl5+aCWg9Wki8ZlWXjgX4Iq8krc6 6ZR0gHBCue2caOBqAraJz9AuLWyhPo1R7i7HIALPopDYXpDEuCCh+l7K8RzYd+7Kn6OqKY5neNv dtRVWi4WUM8SiMnm3bob7nGNwpsptLLayMS9qCi06Ru7ZVu6+c3qrXpBP5Snu1D4moc6rrhMfKQ rIJO/zLuDVltzmriZig== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.20,FMLib:17.12.100.49 definitions=2026-01-26_03,2026-01-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 suspectscore=0 impostorscore=0 phishscore=0 malwarescore=0 adultscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2601260117 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" This commit adds the read/write functionality for few core and quad registers. Reviewed-by: Chalapathi V Reviewed-by: Aditya Gupta Signed-off-by: Chalapathi V Signed-off-by: Caleb Schlossin --- hw/ppc/pnv_core.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c index 8939515c2c..56675f5506 100644 --- a/hw/ppc/pnv_core.c +++ b/hw/ppc/pnv_core.c @@ -185,10 +185,18 @@ static const MemoryRegionOps pnv_core_power9_xscom_op= s =3D { * POWER10 core controls */ =20 +#define PNV10_XSCOM_EC_IMA_EVENT_MASK 0x400 #define PNV10_XSCOM_EC_CORE_THREAD_STATE 0x412 #define PNV10_XSCOM_EC_CORE_THREAD_INFO 0x413 +#define PNV10_XSCOM_EC_CORE_FIRMASK 0x443 +#define PNV10_XSCOM_EC_CORE_FIRMASK_AND 0x444 +#define PNV10_XSCOM_EC_CORE_FIRMASK_OR 0x445 #define PNV10_XSCOM_EC_CORE_DIRECT_CONTROLS 0x449 #define PNV10_XSCOM_EC_CORE_RAS_STATUS 0x454 +#define PNV10_XSCOM_EC_SPATTN_OR 0x497 +#define PNV10_XSCOM_EC_SPATTN_AND 0x498 +#define PNV10_XSCOM_EC_SPATTN 0x499 +#define PNV10_XSCOM_EC_SPATTN_MASK 0x49A =20 static uint64_t pnv_core_power10_xscom_read(void *opaque, hwaddr addr, unsigned int width) @@ -224,6 +232,19 @@ static uint64_t pnv_core_power10_xscom_read(void *opaq= ue, hwaddr addr, } } break; + case PNV10_XSCOM_EC_IMA_EVENT_MASK: + case PNV10_XSCOM_EC_CORE_FIRMASK: + return 0; + case PNV10_XSCOM_EC_CORE_FIRMASK_OR: + case PNV10_XSCOM_EC_CORE_FIRMASK_AND: + case PNV10_XSCOM_EC_SPATTN_OR: + case PNV10_XSCOM_EC_SPATTN_AND: + qemu_log_mask(LOG_GUEST_ERROR, "%s: Write only register, ignoring " + "xscom read at 0x%08x\n", __func__, offset); + break; + case PNV10_XSCOM_EC_SPATTN: + case PNV10_XSCOM_EC_SPATTN_MASK: + return 0; default: qemu_log_mask(LOG_UNIMP, "%s: unimp read 0x%08x\n", __func__, offset); @@ -284,6 +305,15 @@ static void pnv_core_power10_xscom_write(void *opaque,= hwaddr addr, } break; =20 + case PNV10_XSCOM_EC_IMA_EVENT_MASK: + case PNV10_XSCOM_EC_CORE_FIRMASK: + case PNV10_XSCOM_EC_CORE_FIRMASK_OR: + case PNV10_XSCOM_EC_CORE_FIRMASK_AND: + case PNV10_XSCOM_EC_SPATTN_OR: + case PNV10_XSCOM_EC_SPATTN_AND: + case PNV10_XSCOM_EC_SPATTN: + case PNV10_XSCOM_EC_SPATTN_MASK: + break; default: qemu_log_mask(LOG_UNIMP, "%s: unimp write 0x%08x\n", __func__, offset); @@ -579,6 +609,23 @@ static const MemoryRegionOps pnv_quad_power9_xscom_ops= =3D { * POWER10 Quads */ =20 +#define P10_XSCOM_EQ3_MODE_REG1 0x1160a +#define P10_XSCOM_EQ3_NCU_SPEC_BAR_REG 0x11650 +#define P10_XSCOM_EQ3_HTM_MODE 0x11680 +#define P10_XSCOM_EQ3_HTM_IMA_PDBAR 0x1168b +#define P10_XSCOM_EQ2_MODE_REG1 0x1260a +#define P10_XSCOM_EQ2_NCU_SPEC_BAR_REG 0x12650 +#define P10_XSCOM_EQ2_HTM_MODE 0x12680 +#define P10_XSCOM_EQ2_HTM_IMA_PDBAR 0x1268b +#define P10_XSCOM_EQ1_MODE_REG1 0x1460a +#define P10_XSCOM_EQ1_NCU_SPEC_BAR_REG 0x14650 +#define P10_XSCOM_EQ1_HTM_MODE 0x14680 +#define P10_XSCOM_EQ1_HTM_IMA_PDBAR 0x1468b +#define P10_XSCOM_EQ0_MODE_REG1 0x1860a +#define P10_XSCOM_EQ0_NCU_SPEC_BAR_REG 0x18650 +#define P10_XSCOM_EQ0_HTM_MODE 0x18680 +#define P10_XSCOM_EQ0_HTM_IMA_PDBAR 0x1868b + static uint64_t pnv_quad_power10_xscom_read(void *opaque, hwaddr addr, unsigned int width) { @@ -586,6 +633,23 @@ static uint64_t pnv_quad_power10_xscom_read(void *opaq= ue, hwaddr addr, uint64_t val =3D -1; =20 switch (offset) { + case P10_XSCOM_EQ0_MODE_REG1: + case P10_XSCOM_EQ0_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ0_HTM_MODE: + case P10_XSCOM_EQ0_HTM_IMA_PDBAR: + case P10_XSCOM_EQ1_MODE_REG1: + case P10_XSCOM_EQ1_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ1_HTM_MODE: + case P10_XSCOM_EQ1_HTM_IMA_PDBAR: + case P10_XSCOM_EQ2_MODE_REG1: + case P10_XSCOM_EQ2_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ2_HTM_MODE: + case P10_XSCOM_EQ2_HTM_IMA_PDBAR: + case P10_XSCOM_EQ3_MODE_REG1: + case P10_XSCOM_EQ3_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ3_HTM_MODE: + case P10_XSCOM_EQ3_HTM_IMA_PDBAR: + return 0; default: qemu_log_mask(LOG_UNIMP, "%s: unimp read 0x%08x\n", __func__, offset); @@ -600,6 +664,23 @@ static void pnv_quad_power10_xscom_write(void *opaque,= hwaddr addr, uint32_t offset =3D addr >> 3; =20 switch (offset) { + case P10_XSCOM_EQ0_MODE_REG1: + case P10_XSCOM_EQ0_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ0_HTM_MODE: + case P10_XSCOM_EQ0_HTM_IMA_PDBAR: + case P10_XSCOM_EQ1_MODE_REG1: + case P10_XSCOM_EQ1_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ1_HTM_MODE: + case P10_XSCOM_EQ1_HTM_IMA_PDBAR: + case P10_XSCOM_EQ2_MODE_REG1: + case P10_XSCOM_EQ2_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ2_HTM_MODE: + case P10_XSCOM_EQ2_HTM_IMA_PDBAR: + case P10_XSCOM_EQ3_MODE_REG1: + case P10_XSCOM_EQ3_NCU_SPEC_BAR_REG: + case P10_XSCOM_EQ3_HTM_MODE: + case P10_XSCOM_EQ3_HTM_IMA_PDBAR: + break; 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Mon, 26 Jan 2026 13:55:18 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=B9nbKM03l+YsBmkg6 yzSH3HekNyWZvvRFMDmwlEZtkw=; b=CJFmzR+Egdpq6yVqiJu517pFeW/3MACMd nsOxT/G0PyxU9UoksIHHQoOsyoBizOG+MGLswnBG4bftVfPTiQX7TNC8QLgUANM9 S711WmfUZqmnxaiGQrx/4bK5O4r2Ds6/N2Lt5F8C5pZtjbnGLcnFYtmYUwDoOVeM MfI9KcQZexgjQb2wBnEIC+GhAVVbQ7iu/IxiVML2t9C0pIQpX1BWYia0RUF1b+ek 9DvVvXMNnMCMIp4kBVLbu5lKWjamaxQ4muoAc2jFHc/8I8TMxjoudsVdWP/DMNp9 T2N2eJ0VYXUKXHiaC28uBHG1MLl3jQHLokE6tuGtyEyM4lwoE/NGg== From: Caleb Schlossin To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, npiggin@gmail.com, adityag@linux.ibm.com, milesg@linux.ibm.com, chalapathi.v@linux.ibm.com, harshpb@linux.ibm.com, calebs@linux.ibm.com Subject: [PATCH v2 3/3] ppc/pnv: Add OCC FLAG registers Date: Mon, 26 Jan 2026 07:55:07 -0600 Message-ID: <20260126135507.771552-4-calebs@linux.ibm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260126135507.771552-1-calebs@linux.ibm.com> References: <20260126135507.771552-1-calebs@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: smgEytLI3UeaBVTjnfNOdpuSxlU8ts9f X-Authority-Analysis: v=2.4 cv=Uptu9uwB c=1 sm=1 tr=0 ts=6977724a cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=C6aVSkDANSdmHkZ1WT0A:9 X-Proofpoint-ORIG-GUID: H6UXT7KzmjhG-ovr7Xm1eotoSl0pOBtO X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI2MDExNyBTYWx0ZWRfX8cZfBWEu6Nl3 nJdngi4af50QC3h5kStS5SGh/DaxtbZwPO2UKv0/KzhW4llUd6hvkAsvXNWOyj5Ml+z0W6bank6 zrXfEiclJt7Cyt7EZ+UssPuWSPR+7tHPIxjrcV1y9FJYU4Mjno4Q+WvBOjDLb8lzk/apXLlpBX6 QtF+eZEnIPcOCINoNcKo202uCJ98No7lpYrH3qz9ki2gCHToKUCcCh3LJkOcNEDBjITclFOqfAA fff6sLBe8wBeeGJ48BPjy6eD3Bk1xCjI8LPoDkzmioAbxTtafocJhgLzoFkYOnn4ma9Fjf/QIoo gxzwUXylcCL815XsdiluCD/vPmILrm6pa01hmJExhx+1tpqHknGc3KjjzZZmWF4Qnlf0PQ9Zmt+ yIwRILpDiZRQ6eAPYz54fvi5/0CcYHfhOFQk2Biv4MOxbhAIe7cyy9jjKCSd3+pbg56F2+e7dyx F87REZYsi7tY4gUM3Jw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.20,FMLib:17.12.100.49 definitions=2026-01-26_03,2026-01-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 phishscore=0 adultscore=0 impostorscore=0 bulkscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2601260117 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" OCCFLG are scratch registers that can be shared with OCC firmware. Log reads and writes to the registers as a reminder when we run into more OCC code. Add RW, WO_CLEAR and WO_OR SCOM Type enums in pnv_occ.c Reviewed-by: Chalapathi V Reviewed-by: Aditya Gupta Signed-off-by: Chalapathi V Signed-off-by: Caleb Schlossin --- hw/ppc/pnv_occ.c | 55 +++++++++++++++++++++++++++++++++++++--- include/hw/ppc/pnv_occ.h | 4 +++ 2 files changed, 56 insertions(+), 3 deletions(-) diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c index 64cab3e9dc..81dd5cfd1b 100644 --- a/hw/ppc/pnv_occ.c +++ b/hw/ppc/pnv_occ.c @@ -195,6 +195,49 @@ static const TypeInfo pnv_occ_power8_type_info =3D { #define P9_OCB_OCI_OCCMISC_CLEAR 0x6081 #define P9_OCB_OCI_OCCMISC_OR 0x6082 =20 +/* OCC scratch registers for flag setting */ +#define P9_OCCFLG0 0x60ac +#define P9_OCCFLG7_OR 0x60c3 + +enum ScomType { + SCOM_TYPE_RW =3D 0, + SCOM_TYPE_WO_CLEAR =3D 1, + SCOM_TYPE_WO_OR =3D 2, +}; + +static void rw_occ_flag_regs(PnvOCC *occ, uint32_t offset, bool read, + uint64_t *val) +{ + int flag_num; + int flag_type; + + /* + * Each OCCFLG register has SCOM0 - RW, SCOM1 - WO_CLEAR, SCOM2 - WO_OR + * hence divide by 3 to get flag index and mod 3 to get SCOM type. + */ + flag_num =3D (offset - P9_OCCFLG0) / 3; + flag_type =3D (offset - P9_OCCFLG0) % 3; + + if (read) { + if (flag_type) { + qemu_log_mask(LOG_GUEST_ERROR, "OCC: Write only register: Ox%" + PRIx32 "\n", offset); + return; + } + *val =3D occ->occflags[flag_num]; + } else { + switch (flag_type) { + case SCOM_TYPE_RW: + occ->occflags[flag_num] =3D *val; + break; + case SCOM_TYPE_WO_CLEAR: + occ->occflags[flag_num] &=3D ~(*val); + break; + case SCOM_TYPE_WO_OR: + occ->occflags[flag_num] |=3D *val; + } + } +} =20 static uint64_t pnv_occ_power9_xscom_read(void *opaque, hwaddr addr, unsigned size) @@ -207,8 +250,11 @@ static uint64_t pnv_occ_power9_xscom_read(void *opaque= , hwaddr addr, case P9_OCB_OCI_OCCMISC: val =3D occ->occmisc; break; + case P9_OCCFLG0 ... P9_OCCFLG7_OR: + rw_occ_flag_regs(occ, offset, 1, &val); + break; default: - qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%" + qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register read: Ox%" HWADDR_PRIx "\n", addr >> 3); } return val; @@ -229,9 +275,12 @@ static void pnv_occ_power9_xscom_write(void *opaque, h= waddr addr, break; case P9_OCB_OCI_OCCMISC: pnv_occ_set_misc(occ, val); - break; + break; + case P9_OCCFLG0 ... P9_OCCFLG7_OR: + rw_occ_flag_regs(occ, offset, 0, &val); + break; default: - qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%" + qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register write: Ox%" HWADDR_PRIx "\n", addr >> 3); } } diff --git a/include/hw/ppc/pnv_occ.h b/include/hw/ppc/pnv_occ.h index 84bdf5004d..92a4dbf1a0 100644 --- a/include/hw/ppc/pnv_occ.h +++ b/include/hw/ppc/pnv_occ.h @@ -47,6 +47,10 @@ struct PnvOCC { /* OCC Misc interrupt */ uint64_t occmisc; =20 + /* OCC Flags */ +#define NR_FLAG_REGS 8 + uint32_t occflags[NR_FLAG_REGS]; + qemu_irq psi_irq; =20 /* OCCs operate on regions of HOMER memory */ --=20 2.47.3