From nobody Mon Feb 9 23:17:52 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1632982195302487.5314894009299; Wed, 29 Sep 2021 23:09:55 -0700 (PDT) Received: from localhost ([::1]:50928 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVpGU-0001vQ-7G for importer@patchew.org; Thu, 30 Sep 2021 02:09:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47534) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVosd-0001nY-Pi; Thu, 30 Sep 2021 01:45:15 -0400 Received: from gandalf.ozlabs.org ([150.107.74.76]:49923) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVosb-0003e0-Q9; Thu, 30 Sep 2021 01:45:15 -0400 Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4HKhyR2ky7z4xbt; Thu, 30 Sep 2021 15:44:31 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=201602; t=1632980671; bh=g6Rf2uVvu83oM3TD3wsMTGfA3Drp2Sm2Gs72Xvnum5Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TYE3x9I8lKACiSkpFndgMS9sDTRZzzpzG44WRz6RSZm8LxZ6tTru1aEj4v/E29AHm 83F3/G8TMhN3mJYMjceu6DLkwEiJJBH1zE28yhDn0m0ClS2U+Thld8HlCiVVwdViRG j09oaLz5q4vrIecUX/nkX+LPcxNKjFyhZONO2vgo= From: David Gibson To: peter.maydell@linaro.org Subject: [PULL 26/44] spapr_numa.c: scrap 'legacy_numa' concept Date: Thu, 30 Sep 2021 15:44:08 +1000 Message-Id: <20210930054426.357344-27-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210930054426.357344-1-david@gibson.dropbear.id.au> References: <20210930054426.357344-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=150.107.74.76; envelope-from=dgibson@gandalf.ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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: Daniel Henrique Barboza , mark.cave-ayland@ilande.co.uk, qemu-devel@nongnu.org, groug@kaod.org, hpoussin@reactos.org, clg@kaod.org, qemu-ppc@nongnu.org, philmd@redhat.com, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1632982197085100003 Content-Type: text/plain; charset="utf-8" From: Daniel Henrique Barboza When first introduced, 'legacy_numa' was a way to refer to guests that either wouldn't be affected by associativity domain calculations, namely the ones with only 1 NUMA node, and pre 5.2 guests that shouldn't be affected by it because it would be an userspace change. Calling these cases 'legacy_numa' was a convenient way to label these cases. We're about to introduce a new NUMA affinity, FORM2, and this concept of 'legacy_numa' is now a bit misleading because, although it is called 'legacy' it is in fact a FORM1 exclusive contraint. This patch removes spapr_machine_using_legacy_numa() and open code the conditions in each caller. While we're at it, move the chunk inside spapr_numa_FORM1_affinity_init() that sets all numa_assoc_array domains with 'node_id' to spapr_numa_define_FORM1_domains(). This chunk was being executed if !pre_5_2_numa_associativity and num_nodes =3D> 1, the same conditions in which spapr_numa_define_FORM1_domains() is called shortly after. Reviewed-by: Greg Kurz Signed-off-by: Daniel Henrique Barboza Message-Id: <20210920174947.556324-3-danielhb413@gmail.com> Signed-off-by: David Gibson --- hw/ppc/spapr_numa.c | 47 +++++++++++++++++++-------------------------- 1 file changed, 20 insertions(+), 27 deletions(-) diff --git a/hw/ppc/spapr_numa.c b/hw/ppc/spapr_numa.c index 786def7c73..bf520d42b2 100644 --- a/hw/ppc/spapr_numa.c +++ b/hw/ppc/spapr_numa.c @@ -19,15 +19,6 @@ /* Moved from hw/ppc/spapr_pci_nvlink2.c */ #define SPAPR_GPU_NUMA_ID (cpu_to_be32(1)) =20 -static bool spapr_machine_using_legacy_numa(SpaprMachineState *spapr) -{ - MachineState *machine =3D MACHINE(spapr); - SpaprMachineClass *smc =3D SPAPR_MACHINE_GET_CLASS(machine); - - return smc->pre_5_2_numa_associativity || - machine->numa_state->num_nodes <=3D 1; -} - static bool spapr_numa_is_symmetrical(MachineState *ms) { int src, dst; @@ -97,7 +88,18 @@ static void spapr_numa_define_FORM1_domains(SpaprMachine= State *spapr) MachineState *ms =3D MACHINE(spapr); NodeInfo *numa_info =3D ms->numa_state->nodes; int nb_numa_nodes =3D ms->numa_state->num_nodes; - int src, dst, i; + int src, dst, i, j; + + /* + * Fill all associativity domains of non-zero NUMA nodes with + * node_id. This is required because the default value (0) is + * considered a match with associativity domains of node 0. + */ + for (i =3D 1; i < nb_numa_nodes; i++) { + for (j =3D 1; j < MAX_DISTANCE_REF_POINTS; j++) { + spapr->numa_assoc_array[i][j] =3D cpu_to_be32(i); + } + } =20 for (src =3D 0; src < nb_numa_nodes; src++) { for (dst =3D src; dst < nb_numa_nodes; dst++) { @@ -164,7 +166,6 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachine= State *spapr, SpaprMachineClass *smc =3D SPAPR_MACHINE_GET_CLASS(spapr); int nb_numa_nodes =3D machine->numa_state->num_nodes; int i, j, max_nodes_with_gpus; - bool using_legacy_numa =3D spapr_machine_using_legacy_numa(spapr); =20 /* * For all associativity arrays: first position is the size, @@ -178,17 +179,6 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachin= eState *spapr, for (i =3D 0; i < nb_numa_nodes; i++) { spapr->numa_assoc_array[i][0] =3D cpu_to_be32(MAX_DISTANCE_REF_POI= NTS); spapr->numa_assoc_array[i][MAX_DISTANCE_REF_POINTS] =3D cpu_to_be3= 2(i); - - /* - * Fill all associativity domains of non-zero NUMA nodes with - * node_id. This is required because the default value (0) is - * considered a match with associativity domains of node 0. - */ - if (!using_legacy_numa && i !=3D 0) { - for (j =3D 1; j < MAX_DISTANCE_REF_POINTS; j++) { - spapr->numa_assoc_array[i][j] =3D cpu_to_be32(i); - } - } } =20 /* @@ -214,11 +204,13 @@ static void spapr_numa_FORM1_affinity_init(SpaprMachi= neState *spapr, } =20 /* - * Legacy NUMA guests (pseries-5.1 and older, or guests with only - * 1 NUMA node) will not benefit from anything we're going to do - * after this point. + * Guests pseries-5.1 and older uses zeroed associativity domains, + * i.e. no domain definition based on NUMA distance input. + * + * Same thing with guests that have only one NUMA node. */ - if (using_legacy_numa) { + if (smc->pre_5_2_numa_associativity || + machine->numa_state->num_nodes <=3D 1) { return; } =20 @@ -334,7 +326,8 @@ static void spapr_numa_FORM1_write_rtas_dt(SpaprMachine= State *spapr, cpu_to_be32(maxdomain) }; =20 - if (spapr_machine_using_legacy_numa(spapr)) { + if (smc->pre_5_2_numa_associativity || + ms->numa_state->num_nodes <=3D 1) { uint32_t legacy_refpoints[] =3D { cpu_to_be32(0x4), cpu_to_be32(0x4), --=20 2.31.1