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Thu, 15 May 2025 15:34:32 +0000 (GMT) Message-ID: <197e590c8f77c8c1f0f47a19ca2ef322b0784fdf.camel@linux.ibm.com> Subject: Re: [PATCH 04/50] ppc/xive2: Remote VSDs need to match on forwarding address From: Miles Glenn To: Nicholas Piggin , qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, =?ISO-8859-1?Q?Fr=E9d=E9ric?= Barrat , Michael Kowal , Caleb Schlossin Date: Thu, 15 May 2025 10:34:32 -0500 In-Reply-To: <20250512031100.439842-5-npiggin@gmail.com> References: <20250512031100.439842-1-npiggin@gmail.com> <20250512031100.439842-5-npiggin@gmail.com> Organization: IBM Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-27.el8_10) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Mq6o6O3yuacXPcsgX7SkZW8-JOXitD2f X-Authority-Analysis: v=2.4 cv=ecg9f6EH c=1 sm=1 tr=0 ts=6826098c cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=VnNF1IyMAAAA:8 a=BZqlLmCw9VANlYX6ozUA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: 4ZMxFHtmBiUUgrWNhw1H1V9wsHKXBfYM X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE1MDE1MCBTYWx0ZWRfX0cL08sDYnqPA iOf5BZy+sqU2g1fmRVA14lA0BGOtun91QcygGdhS3Z0Co2uv0mPtiVIjJdoQKTS/W9GhOt5eMe3 f597W9codbNKBAZ3IJpLLtq7CvPDv5iNfU2+EMr0M9j71CRyXeNmSDvNM+vtKSXbjEcpY3guvVW kl1FI+z6/mc6PQaIMRbNup7rwyveyOdF9UgvxyK/FQ9vkXTl88vRkQrr8IfLe0jxYb6Vk9i+bTY dz6I9Rjus0IZ0Vmx/y6RMit/LPLLgZvGN84JaBov9ISEpFZEv+em/zcGQBUvZi6b5JzdasPhlzr aZHR4pbJcddWwe9PX+SOtTZx+9eePwh8mPcJ0hbnaSOhqx5PaZ0a45zFoGtcNC7T+gCEoJ+3k/X G2+NyxGEdgmnSUP4QmXHW28OOAWzKXsGLV/o+YUV3e3UataRe1JTAxVHV5Sn2XUID3Kt0UQG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-15_06,2025-05-15_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 spamscore=0 clxscore=1015 malwarescore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 bulkscore=0 suspectscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505150150 Received-SPF: pass client-ip=148.163.158.5; envelope-from=milesg@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: , Reply-To: milesg@linux.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Reviewed-by: Glenn Miles On Mon, 2025-05-12 at 13:10 +1000, Nicholas Piggin wrote: > From: Michael Kowal > > In a multi chip environment there will be remote/forwarded VSDs. The check > to find a matching INT controller (XIVE) of the remote block number was > checking the INTs chip number. Block numbers are not tied to a chip number. > The matching remote INT is the one that matches the forwarded VSD address > with VSD types associated MMIO BAR. > > Signed-off-by: Michael Kowal > --- > hw/intc/pnv_xive2.c | 25 +++++++++++++++++-------- > 1 file changed, 17 insertions(+), 8 deletions(-) > > diff --git a/hw/intc/pnv_xive2.c b/hw/intc/pnv_xive2.c > index d1713b406c..30b4ab2efe 100644 > --- a/hw/intc/pnv_xive2.c > +++ b/hw/intc/pnv_xive2.c > @@ -102,12 +102,10 @@ static uint32_t pnv_xive2_block_id(PnvXive2 *xive) > } > > /* > - * Remote access to controllers. HW uses MMIOs. For now, a simple scan > - * of the chips is good enough. > - * > - * TODO: Block scope support > + * Remote access to INT controllers. HW uses MMIOs(?). For now, a simple > + * scan of all the chips INT controller is good enough. > */ > -static PnvXive2 *pnv_xive2_get_remote(uint8_t blk) > +static PnvXive2 *pnv_xive2_get_remote(uint32_t vsd_type, hwaddr fwd_addr) > { > PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine()); > int i; > @@ -116,10 +114,22 @@ static PnvXive2 *pnv_xive2_get_remote(uint8_t blk) > Pnv10Chip *chip10 = PNV10_CHIP(pnv->chips[i]); > PnvXive2 *xive = &chip10->xive; > > - if (pnv_xive2_block_id(xive) == blk) { > + /* > + * Is this the XIVE matching the forwarded VSD address is for this > + * VSD type > + */ > + if ((vsd_type == VST_ESB && fwd_addr == xive->esb_base) || > + (vsd_type == VST_END && fwd_addr == xive->end_base) || > + ((vsd_type == VST_NVP || > + vsd_type == VST_NVG) && fwd_addr == xive->nvpg_base) || > + (vsd_type == VST_NVC && fwd_addr == xive->nvc_base)) { > return xive; > } > } > + > + qemu_log_mask(LOG_GUEST_ERROR, > + "XIVE: >>>>> pnv_xive2_get_remote() vsd_type %u fwd_addr 0x%lX NOT FOUND\n", > + vsd_type, fwd_addr); > return NULL; > } > > @@ -252,8 +262,7 @@ static uint64_t pnv_xive2_vst_addr(PnvXive2 *xive, uint32_t type, uint8_t blk, > > /* Remote VST access */ > if (GETFIELD(VSD_MODE, vsd) == VSD_MODE_FORWARD) { > - xive = pnv_xive2_get_remote(blk); > - > + xive = pnv_xive2_get_remote(type, (vsd & VSD_ADDRESS_MASK)); > return xive ? pnv_xive2_vst_addr(xive, type, blk, idx) : 0; > } >