From: James Morse <james.morse@arm.com> To: Gavin Shan <gshan@redhat.com>, linux-pm@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Cc: Marc Zyngier <maz@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Sudeep Holla <sudeep.holla@arm.com>, Borislav Petkov <bp@alien8.de>, H Peter Anvin <hpa@zytor.com>, Dave Hansen <dave.hansen@linux.intel.com>, Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Huacai Chen <chenhuacai@kernel.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Len Brown <lenb@kernel.org>, Rafael Wysocki <rafael@kernel.org>, WANG Xuerui <kernel@xen0n.name>, Salil Mehta <salil.mehta@huawei.com>, Russell King <linux@armlinux.org.uk>, Jean-Philippe Brucker <jean-philippe@linaro.org> Subject: Re: [RFC PATCH 00/32] ACPI/arm64: add support for virtual cpuhotplug Date: Tue, 12 Sep 2023 18:01:28 +0100 [thread overview] Message-ID: <1ca1fb8f-1dec-74a3-ee44-94609f6aba2c@arm.com> (raw) In-Reply-To: <41dd71ab-a6a7-fd93-73ec-64a6b0ca468e@redhat.com> Hi Gavin, On 29/03/2023 03:35, Gavin Shan wrote: > On 2/3/23 9:50 PM, James Morse wrote: >> If folk want to play along at home, you'll need a copy of Qemu that supports this. >> https://github.com/salil-mehta/qemu.git >> salil/virt-cpuhp-armv8/rfc-v1-port29092022.psci.present >> >> You'll need to fix the numbers of KVM_CAP_ARM_HVC_TO_USER and KVM_CAP_ARM_PSCI_TO_USER >> to match your host kernel. Replace your '-smp' argument with something like: >> | -smp cpus=1,maxcpus=3,cores=3,threads=1,sockets=1 >> >> then feed the following to the Qemu montior; >> | (qemu) device_add driver=host-arm-cpu,core-id=1,id=cpu1 >> | (qemu) device_del cpu1 >> >> >> This series is based on v6.2-rc3, and can be retrieved from: >> https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/ virtual_cpu_hotplug/rfc/v1 > I give it a try, but the hot-added CPU needs to be put into online > state manually. I'm not sure if it's expected or not. This is expected. If you want the CPUs to be brought online automatically, you can add udev rules to do that. Thanks, James
WARNING: multiple messages have this Message-ID (diff)
From: James Morse <james.morse@arm.com> To: Gavin Shan <gshan@redhat.com>, linux-pm@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Cc: Marc Zyngier <maz@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Sudeep Holla <sudeep.holla@arm.com>, Borislav Petkov <bp@alien8.de>, H Peter Anvin <hpa@zytor.com>, Dave Hansen <dave.hansen@linux.intel.com>, Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Huacai Chen <chenhuacai@kernel.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Len Brown <lenb@kernel.org>, Rafael Wysocki <rafael@kernel.org>, WANG Xuerui <kernel@xen0n.name>, Salil Mehta <salil.mehta@huawei.com>, Russell King <linux@armlinux.org.uk>, Jean-Philippe Brucker <jean-philippe@linaro.org> Subject: Re: [RFC PATCH 00/32] ACPI/arm64: add support for virtual cpuhotplug Date: Tue, 12 Sep 2023 18:01:28 +0100 [thread overview] Message-ID: <1ca1fb8f-1dec-74a3-ee44-94609f6aba2c@arm.com> (raw) In-Reply-To: <41dd71ab-a6a7-fd93-73ec-64a6b0ca468e@redhat.com> Hi Gavin, On 29/03/2023 03:35, Gavin Shan wrote: > On 2/3/23 9:50 PM, James Morse wrote: >> If folk want to play along at home, you'll need a copy of Qemu that supports this. >> https://github.com/salil-mehta/qemu.git >> salil/virt-cpuhp-armv8/rfc-v1-port29092022.psci.present >> >> You'll need to fix the numbers of KVM_CAP_ARM_HVC_TO_USER and KVM_CAP_ARM_PSCI_TO_USER >> to match your host kernel. Replace your '-smp' argument with something like: >> | -smp cpus=1,maxcpus=3,cores=3,threads=1,sockets=1 >> >> then feed the following to the Qemu montior; >> | (qemu) device_add driver=host-arm-cpu,core-id=1,id=cpu1 >> | (qemu) device_del cpu1 >> >> >> This series is based on v6.2-rc3, and can be retrieved from: >> https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/ virtual_cpu_hotplug/rfc/v1 > I give it a try, but the hot-added CPU needs to be put into online > state manually. I'm not sure if it's expected or not. This is expected. If you want the CPUs to be brought online automatically, you can add udev rules to do that. Thanks, James _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-09-12 17:01 UTC|newest] Thread overview: 164+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-02-03 13:50 [RFC PATCH 00/32] ACPI/arm64: add support for virtual cpuhotplug James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 01/32] ia64: Fix build error due to switch case label appearing next to declaration James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 02/32] ACPI: Move ACPI_HOTPLUG_CPU to be enabled per architecture James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-08-30 18:31 ` Russell King (Oracle) 2023-08-30 18:31 ` Russell King (Oracle) 2023-02-03 13:50 ` [RFC PATCH 03/32] drivers: base: Use present CPUs in GENERIC_CPU_DEVICES James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 04/32] drivers: base: Allow parts of GENERIC_CPU_DEVICES to be overridden James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 05/32] drivers: base: Move cpu_dev_init() after node_dev_init() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 06/32] arm64: setup: Switch over to GENERIC_CPU_DEVICES using arch_register_cpu() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 07/32] ia64/topology: Switch over to GENERIC_CPU_DEVICES James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 08/32] x86/topology: " James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 09/32] LoongArch: " James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 10/32] arch_topology: Make register_cpu_capacity_sysctl() tolerant to late CPUs James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 11/32] ACPI: processor: Add support for processors described as container packages James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 12/32] ACPI: processor: Register CPUs that are online, but not described in the DSDT James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 13/32] ACPI: processor: Register all CPUs from acpi_processor_get_info() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 14/32] ACPI: Rename ACPI_HOTPLUG_CPU to include 'present' James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 15/32] ACPI: Move acpi_bus_trim_one() before acpi_scan_hot_remove() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 16/32] ACPI: Rename acpi_processor_hotadd_init and remove pre-processor guards James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 17/32] ACPI: Add post_eject to struct acpi_scan_handler for cpu hotplug James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 18/32] ACPI: Check _STA present bit before making CPUs not present James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 19/32] ACPI: Warn when the present bit changes but the feature is not enabled James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 20/32] drivers: base: Implement weak arch_unregister_cpu() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 21/32] LoongArch: Use the __weak version of arch_unregister_cpu() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 22/32] arm64: acpi: Move get_cpu_for_acpi_id() to a header James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 23/32] ACPICA: Add new MADT GICC flags fields [code first?] James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 24/32] arm64, irqchip/gic-v3, ACPI: Move MADT GICC enabled check into a helper James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 25/32] irqchip/gic-v3: Don't return errors from gic_acpi_match_gicc() James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 26/32] irqchip/gic-v3: Add support for ACPI's disabled but 'online capable' CPUs James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 27/32] arm64: psci: Ignore DENIED CPUs James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 28/32] ACPI: add support to register CPUs based on the _STA enabled bit James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 29/32] KVM: arm64: Pass hypercalls to userspace James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 21:08 ` Oliver Upton 2023-02-03 21:08 ` Oliver Upton 2023-02-03 21:08 ` Oliver Upton 2023-02-07 17:50 ` James Morse 2023-02-07 17:50 ` James Morse 2023-02-07 17:50 ` James Morse 2023-02-08 9:02 ` Marc Zyngier 2023-02-08 9:02 ` Marc Zyngier 2023-02-05 10:12 ` Marc Zyngier 2023-02-05 10:12 ` Marc Zyngier 2023-02-06 10:10 ` Suzuki K Poulose 2023-02-06 10:10 ` Suzuki K Poulose 2023-02-06 10:10 ` Suzuki K Poulose 2023-02-06 12:31 ` Marc Zyngier 2023-02-06 12:31 ` Marc Zyngier 2023-02-07 9:41 ` Suzuki K Poulose 2023-02-07 9:41 ` Suzuki K Poulose 2023-02-07 9:41 ` Suzuki K Poulose 2023-02-07 11:23 ` Marc Zyngier 2023-02-07 11:23 ` Marc Zyngier 2023-02-07 12:46 ` Suzuki K Poulose 2023-02-07 12:46 ` Suzuki K Poulose 2023-02-07 12:46 ` Suzuki K Poulose 2023-02-06 17:19 ` Oliver Upton 2023-02-06 17:19 ` Oliver Upton 2023-02-06 17:19 ` Oliver Upton 2023-02-07 17:50 ` James Morse 2023-02-07 17:50 ` James Morse 2023-02-07 17:50 ` James Morse 2023-02-08 8:40 ` Marc Zyngier 2023-02-08 8:40 ` Marc Zyngier 2023-02-08 14:25 ` Marc Zyngier 2023-02-08 14:25 ` Marc Zyngier 2023-02-11 1:44 ` Oliver Upton 2023-02-11 1:44 ` Oliver Upton 2023-02-03 13:50 ` [RFC PATCH 30/32] KVM: arm64: Pass PSCI calls " James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-05-23 9:32 ` Salil Mehta 2023-05-23 9:32 ` Salil Mehta 2023-05-23 9:32 ` Salil Mehta 2023-09-12 17:01 ` James Morse 2023-09-12 17:01 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 31/32] arm64: document virtual CPU hotplug's expectations James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` [RFC PATCH 32/32] cpumask: Add enabled cpumask for present CPUs that can be brought online James Morse 2023-02-03 13:50 ` James Morse 2023-02-03 13:50 ` James Morse 2023-03-07 12:00 ` [RFC PATCH 00/32] ACPI/arm64: add support for virtual cpuhotplug Jonathan Cameron 2023-03-07 12:00 ` Jonathan Cameron 2023-03-07 12:00 ` Jonathan Cameron 2023-03-13 15:50 ` James Morse 2023-03-13 15:50 ` James Morse 2023-03-14 11:02 ` Jonathan Cameron 2023-03-14 11:02 ` Jonathan Cameron 2023-03-14 11:02 ` Jonathan Cameron 2023-03-29 2:35 ` Gavin Shan 2023-03-29 2:35 ` Gavin Shan 2023-03-29 2:35 ` Gavin Shan 2023-09-12 17:01 ` James Morse [this message] 2023-09-12 17:01 ` James Morse 2023-09-12 22:38 ` Gavin Shan 2023-09-12 22:38 ` Gavin Shan 2023-09-13 15:28 ` Russell King (Oracle) 2023-09-13 15:28 ` Russell King (Oracle) 2023-03-29 5:52 ` Shaoqin Huang 2023-03-29 5:52 ` Shaoqin Huang 2023-03-29 5:52 ` Shaoqin Huang 2023-04-03 6:25 ` Gavin Shan 2023-04-03 6:25 ` Gavin Shan 2023-04-03 6:25 ` Gavin Shan
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