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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1753115045; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yDXV9JEqd2YGulb9ZztH7aN7aI/DnHYJgwb9sf9N20o=; b=CuYwLsScJCNQhE5VmoFzE/WDEJbO4Ngf6DrHSlSUEpyPw7Nt6yaUoVHSAvOOjbhBjTIqSh q1cyPj1R4mMqwt1mE2Z+SKjA+MiUJNA+szho6gsCNdRGEdDkPwJ+3ScK6LbrNY1zxrzvBs 8su1WCRwXlrhD1nlQX542Hzuq2O9jhc= X-MC-Unique: zhr1gl49MV-68yB-N4hrTw-1 X-Mimecast-MFC-AGG-ID: zhr1gl49MV-68yB-N4hrTw_1753115040 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Daniel Henrique Barboza , Glenn Miles , Michael Kowal , Gautam Menghani , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 29/50] ppc/xive2: Redistribute group interrupt preempted by higher priority interrupt Date: Mon, 21 Jul 2025 18:22:12 +0200 Message-ID: <20250721162233.686837-30-clg@redhat.com> In-Reply-To: <20250721162233.686837-1-clg@redhat.com> References: <20250721162233.686837-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 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=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.926, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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 @redhat.com) X-ZM-MESSAGEID: 1753115208314116600 From: Nicholas Piggin A group interrupt that gets preempted by a higher priority interrupt delivery must be redistributed otherwise it would get lost. Signed-off-by: Nicholas Piggin Reviewed-by: Glenn Miles Reviewed-by: Michael Kowal Tested-by: Gautam Menghani Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-30-npiggin@g= mail.com Signed-off-by: C=C3=A9dric Le Goater --- hw/intc/xive2.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index 602b23d06d80..f51fd38a13eb 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -1638,11 +1638,21 @@ static void xive2_router_end_notify(Xive2Router *xr= tr, uint8_t end_blk, crowd, cam_ignore, priority, xive_get_field32(END2_W7_F1_LOG_SERVER_ID, en= d.w7), &match)) { + XiveTCTX *tctx =3D match.tctx; + uint8_t ring =3D match.ring; + uint8_t alt_ring =3D (ring =3D=3D TM_QW2_HV_POOL) ? TM_QW3_HV_PHYS= : ring; + uint8_t *aregs =3D &tctx->regs[alt_ring]; + uint8_t nsr =3D aregs[TM_NSR]; uint8_t group_level; =20 + if (priority < aregs[TM_PIPR] && + xive_nsr_indicates_group_exception(alt_ring, nsr)) { + xive2_redistribute(xrtr, tctx, alt_ring); + } + group_level =3D xive_get_group_level(crowd, cam_ignore, nvx_blk, n= vx_idx); - trace_xive_presenter_notify(nvx_blk, nvx_idx, match.ring, group_le= vel); - xive_tctx_pipr_update(match.tctx, match.ring, priority, group_leve= l); + trace_xive_presenter_notify(nvx_blk, nvx_idx, ring, group_level); + xive_tctx_pipr_update(tctx, ring, priority, group_level); return; } =20 --=20 2.50.1