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Thu, 12 Sep 2024 20:50:41 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7FD2520040; Thu, 12 Sep 2024 20:50:40 +0000 (GMT) Received: from gfwr518.rchland.ibm.com (unknown [9.10.239.106]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 12 Sep 2024 20:50:40 +0000 (GMT) From: Michael Kowal To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, clg@kaod.org, fbarrat@linux.ibm.com, npiggin@gmail.com, milesg@linux.ibm.com Subject: [PATCH v3 04/14] pnv/xive2: Support for "OS LGS Push" TIMA operation Date: Thu, 12 Sep 2024 15:50:18 -0500 Message-Id: <20240912205028.15854-5-kowal@linux.ibm.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20240912205028.15854-1-kowal@linux.ibm.com> References: <20240912205028.15854-1-kowal@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 29ZI6G-ZN4YoLZo0dDM40MoI32dzQ66u X-Proofpoint-ORIG-GUID: gpdLK75-p8daXMXMguU8LzwDTbi6xlje X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-12_07,2024-09-12_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=988 lowpriorityscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 clxscore=1015 malwarescore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409120149 Received-SPF: pass client-ip=148.163.156.1; envelope-from=kowal@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Glenn Miles Adds support for single byte writes to offset 0x15 of the TIMA address space. This offset holds the Logical Server Group Size (LGS) field. The field is used to evenly distribute the interrupt load among the members of a group, but is unused in the current implementation so we just support the writing of the value for now. Signed-off-by: Glenn Miles Signed-off-by: Michael Kowal Reviewed-by: Cédric Le Goater --- hw/intc/xive.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/hw/intc/xive.c b/hw/intc/xive.c index 8e62c7e75f..8605dd618f 100644 --- a/hw/intc/xive.c +++ b/hw/intc/xive.c @@ -341,6 +341,19 @@ static void xive_tm_set_os_cppr(XivePresenter *xptr, XiveTCTX *tctx, xive_tctx_set_cppr(tctx, TM_QW1_OS, value & 0xff); } +static void xive_tctx_set_lgs(XiveTCTX *tctx, uint8_t ring, uint8_t lgs) +{ + uint8_t *regs = &tctx->regs[ring]; + + regs[TM_LGS] = lgs; +} + +static void xive_tm_set_os_lgs(XivePresenter *xptr, XiveTCTX *tctx, + hwaddr offset, uint64_t value, unsigned size) +{ + xive_tctx_set_lgs(tctx, TM_QW1_OS, value & 0xff); +} + /* * Adjust the IPB to allow a CPU to process event queues of other * priorities during one physical interrupt cycle. @@ -525,6 +538,8 @@ static const XiveTmOp xive2_tm_operations[] = { NULL }, { XIVE_TM_HV_PAGE, TM_QW1_OS + TM_WORD2, 4, xive2_tm_push_os_ctx, NULL }, + { XIVE_TM_OS_PAGE, TM_QW1_OS + TM_LGS, 1, xive_tm_set_os_lgs, + NULL }, { XIVE_TM_HV_PAGE, TM_QW3_HV_PHYS + TM_CPPR, 1, xive_tm_set_hv_cppr, NULL }, { XIVE_TM_HV_PAGE, TM_QW3_HV_PHYS + TM_WORD2, 1, xive_tm_vt_push,