From nobody Mon Feb 9 20:46:06 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1571729295; cv=none; d=zoho.com; s=zohoarc; b=OxUicNMUqspak20n+UJ+zL5XlBit9T68kNBsp7uA2sQPZGbzCy9FRJVTT5ebOqcy9fhXwy76feSH75hP+9cznUxf8rZQMxQIkcdZzjzEcwPCP7DNdxlkZp6LSgxnjkZ3RJvid8LtAJfNsL/GyFX0oWQ0OJF8VVN/byncZT78DaI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571729295; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=8Sx5osBwAR1ot7OHQCaCR4zXtZxjVbr2EZS5FPEZq2o=; b=BIncyyIChdEZhookvL+NHg61Zm17pENgHkY8IvU7atbzN24kxlNKdUUF21nY+ZOoBcotfDGFneInuD8E3j/IfyVgMOAGbZjsGu7cOiCiM/fJeg+ADPrzfDBHE+6prIZgJO7E4b4Gd60TBHga57go1nLVO1wcWiQmnL04r79DonE= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1571729295884896.9173052030403; Tue, 22 Oct 2019 00:28:15 -0700 (PDT) Received: from localhost ([::1]:51042 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iMoaU-00053U-Ns for importer@patchew.org; Tue, 22 Oct 2019 03:28:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39406) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iMoVw-000723-7N for qemu-devel@nongnu.org; Tue, 22 Oct 2019 03:23:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iMoVu-0005tJ-V5 for qemu-devel@nongnu.org; Tue, 22 Oct 2019 03:23:32 -0400 Received: from 5.mo178.mail-out.ovh.net ([46.105.51.53]:58920) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iMoVu-0005sK-OF for qemu-devel@nongnu.org; Tue, 22 Oct 2019 03:23:30 -0400 Received: from player786.ha.ovh.net (unknown [10.109.146.1]) by mo178.mail-out.ovh.net (Postfix) with ESMTP id 382E37CC81 for ; Tue, 22 Oct 2019 09:23:29 +0200 (CEST) Received: from kaod.org (lfbn-1-2229-223.w90-76.abo.wanadoo.fr [90.76.50.223]) (Authenticated sender: clg@kaod.org) by player786.ha.ovh.net (Postfix) with ESMTPSA id CB69BB518C42; Tue, 22 Oct 2019 07:23:23 +0000 (UTC) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: David Gibson Subject: [PATCH v3 4/4] spapr/xive: Set the OS CAM line at reset Date: Tue, 22 Oct 2019 09:22:46 +0200 Message-Id: <20191022072246.9200-5-clg@kaod.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191022072246.9200-1-clg@kaod.org> References: <20191022072246.9200-1-clg@kaod.org> MIME-Version: 1.0 X-Ovh-Tracer-Id: 12569828037710613478 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedufedrkeeigdduudelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddm Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 46.105.51.53 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, Greg Kurz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" When a Virtual Processor is scheduled to run on a HW thread, the hypervisor pushes its identifier in the OS CAM line. When running with kernel_irqchip=3Doff, QEMU needs to emulate the same behavior. Set the OS CAM line when the interrupt presenter of the sPAPR core is reseted. This will also cover the case of hot-plugged CPUs. This change also has the benefit to remove the use of CPU_FOREACH() which can be unsafe. Signed-off-by: C=C3=A9dric Le Goater Reviewed-by: Greg Kurz --- include/hw/ppc/spapr_xive.h | 1 - hw/intc/spapr_xive.c | 48 +++++++++++++------------------------ 2 files changed, 17 insertions(+), 32 deletions(-) diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h index d84bd5c229f0..742b7e834f2a 100644 --- a/include/hw/ppc/spapr_xive.h +++ b/include/hw/ppc/spapr_xive.h @@ -57,7 +57,6 @@ typedef struct SpaprXive { void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon); =20 void spapr_xive_hcall_init(SpaprMachineState *spapr); -void spapr_xive_set_tctx_os_cam(XiveTCTX *tctx); void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool enable); void spapr_xive_map_mmio(SpaprXive *xive); =20 diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c index 20a8d8285f64..d8e1291905c3 100644 --- a/hw/intc/spapr_xive.c +++ b/hw/intc/spapr_xive.c @@ -205,23 +205,6 @@ void spapr_xive_mmio_set_enabled(SpaprXive *xive, bool= enable) memory_region_set_enabled(&xive->end_source.esb_mmio, false); } =20 -/* - * When a Virtual Processor is scheduled to run on a HW thread, the - * hypervisor pushes its identifier in the OS CAM line. Emulate the - * same behavior under QEMU. - */ -void spapr_xive_set_tctx_os_cam(XiveTCTX *tctx) -{ - uint8_t nvt_blk; - uint32_t nvt_idx; - uint32_t nvt_cam; - - spapr_xive_cpu_to_nvt(POWERPC_CPU(tctx->cs), &nvt_blk, &nvt_idx); - - nvt_cam =3D cpu_to_be32(TM_QW1W2_VO | xive_nvt_cam_line(nvt_blk, nvt_i= dx)); - memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &nvt_cam, 4); -} - static void spapr_xive_end_reset(XiveEND *end) { memset(end, 0, sizeof(*end)); @@ -544,21 +527,32 @@ static int spapr_xive_cpu_intc_create(SpaprInterruptC= ontroller *intc, } =20 spapr_cpu->tctx =3D XIVE_TCTX(obj); - - /* - * (TCG) Early setting the OS CAM line for hotplugged CPUs as they - * don't beneficiate from the reset of the XIVE IRQ backend - */ - spapr_xive_set_tctx_os_cam(spapr_cpu->tctx); return 0; } =20 +static void xive_tctx_set_os_cam(XiveTCTX *tctx, uint32_t os_cam) +{ + uint32_t qw1w2 =3D cpu_to_be32(TM_QW1W2_VO | os_cam); + memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2, 4); +} + static void spapr_xive_cpu_intc_reset(SpaprInterruptController *intc, PowerPCCPU *cpu) { XiveTCTX *tctx =3D spapr_cpu_state(cpu)->tctx; + uint8_t nvt_blk; + uint32_t nvt_idx; =20 xive_tctx_reset(tctx); + + /* + * When a Virtual Processor is scheduled to run on a HW thread, + * the hypervisor pushes its identifier in the OS CAM line. + * Emulate the same behavior under QEMU. + */ + spapr_xive_cpu_to_nvt(cpu, &nvt_blk, &nvt_idx); + + xive_tctx_set_os_cam(tctx, xive_nvt_cam_line(nvt_blk, nvt_idx)); } =20 static void spapr_xive_set_irq(SpaprInterruptController *intc, int irq, in= t val) @@ -651,14 +645,6 @@ static void spapr_xive_dt(SpaprInterruptController *in= tc, uint32_t nr_servers, static int spapr_xive_activate(SpaprInterruptController *intc, Error **err= p) { SpaprXive *xive =3D SPAPR_XIVE(intc); - CPUState *cs; - - CPU_FOREACH(cs) { - PowerPCCPU *cpu =3D POWERPC_CPU(cs); - - /* (TCG) Set the OS CAM line of the thread interrupt context. */ - spapr_xive_set_tctx_os_cam(spapr_cpu_state(cpu)->tctx); - } =20 if (kvm_enabled()) { int rc =3D spapr_irq_init_kvm(kvmppc_xive_connect, intc, errp); --=20 2.21.0