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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR02MB2267 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.38.47 Subject: [Qemu-devel] [PATCH v1 1/2] target/arm: Add a cluster size property X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair23@gmail.com, alistair.francis@xilinx.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The cortex A53 TRM specifices that bits 24 and 25 of the L2CTLR register specify the number of cores present and not the number of processors. To report this correctly on machines with multiple CPU clusters (ARM's big.LITTLE or Xilinx's ZynqMP) we need to allow the machine to overwrite this value. To do this let's add an optional property. Signed-off-by: Alistair Francis --- target/arm/cpu.h | 5 +++++ target/arm/cpu.c | 1 + target/arm/cpu64.c | 11 +++++++++-- 3 files changed, 15 insertions(+), 2 deletions(-) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 8dd6b788df..3fa8fdad21 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -745,6 +745,11 @@ struct ARMCPU { /* Uniprocessor system with MP extensions */ bool mp_is_up; =20 + /* Specify the number of cores in this CPU cluster. Used for the L2CTLR + * register. + */ + int32_t core_count; + /* The instance init functions for implementation-specific subclasses * set these fields to specify the implementation-dependent values of * various constant registers and reset values of non-constant diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 6b77aaa445..7a17ba1418 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -1765,6 +1765,7 @@ static Property arm_cpu_properties[] =3D { DEFINE_PROP_UINT64("mp-affinity", ARMCPU, mp_affinity, ARM64_AFFINITY_INVALID), DEFINE_PROP_INT32("node-id", ARMCPU, node_id, CPU_UNSET_NUMA_NODE_ID), + DEFINE_PROP_INT32("core-count", ARMCPU, core_count, -1), DEFINE_PROP_END_OF_LIST() }; =20 diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 4228713b19..5e5ae44aeb 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -42,8 +42,15 @@ static inline void unset_feature(CPUARMState *env, int f= eature) #ifndef CONFIG_USER_ONLY static uint64_t a57_a53_l2ctlr_read(CPUARMState *env, const ARMCPRegInfo *= ri) { - /* Number of processors is in [25:24]; otherwise we RAZ */ - return (smp_cpus - 1) << 24; + ARMCPU *cpu =3D arm_env_get_cpu(env); + + /* Number of cores is in [25:24]; otherwise we RAZ */ + if (cpu->core_count =3D=3D -1) { + /* No core_count specified, default to smp_cpus. */ + return (smp_cpus - 1) << 24; + } else { + return (cpu->core_count - 1) << 24; + } } #endif =20 --=20 2.14.1 From nobody Fri Oct 24 21:49:09 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1520010780516412.1307390614006; Fri, 2 Mar 2018 09:13:00 -0800 (PST) Received: from localhost ([::1]:36468 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eroEt-00058n-La for importer@patchew.org; Fri, 02 Mar 2018 12:12:59 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56361) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eroDD-0004CP-6u for qemu-devel@nongnu.org; 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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR02MB2261 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.33.45 Subject: [Qemu-devel] [PATCH v1 2/2] hw/arm: Set the core count for Xilinx's ZynqMP X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair23@gmail.com, alistair.francis@xilinx.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Set the ARM CPU core count property for the A53's attached to the Xilnx ZynqMP machine. Signed-off-by: Alistair Francis Reviewed-by: Peter Maydell --- hw/arm/xlnx-zynqmp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c index 69227fd4c9..465796e97c 100644 --- a/hw/arm/xlnx-zynqmp.c +++ b/hw/arm/xlnx-zynqmp.c @@ -282,6 +282,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error= **errp) s->virt, "has_el2", NULL); object_property_set_int(OBJECT(&s->apu_cpu[i]), GIC_BASE_ADDR, "reset-cbar", &error_abort); + object_property_set_int(OBJECT(&s->apu_cpu[i]), num_apus, + "core-count", &error_abort); object_property_set_bool(OBJECT(&s->apu_cpu[i]), true, "realized", &err); if (err) { --=20 2.14.1