From: Gavin Shan <gshan@redhat.com>
To: salil.mehta@opnsrc.net, qemu-devel@nongnu.org,
qemu-arm@nongnu.org, mst@redhat.com
Cc: salil.mehta@huawei.com, maz@kernel.org, jean-philippe@linaro.org,
jonathan.cameron@huawei.com, lpieralisi@kernel.org,
peter.maydell@linaro.org, richard.henderson@linaro.org,
imammedo@redhat.com, armbru@redhat.com, andrew.jones@linux.dev,
david@redhat.com, philmd@linaro.org, eric.auger@redhat.com,
will@kernel.org, ardb@kernel.org, oliver.upton@linux.dev,
pbonzini@redhat.com, rafael@kernel.org,
borntraeger@linux.ibm.com, alex.bennee@linaro.org,
gustavo.romero@linaro.org, npiggin@gmail.com,
harshpb@linux.ibm.com, linux@armlinux.org.uk,
darren@os.amperecomputing.com, ilkka@os.amperecomputing.com,
vishnu@os.amperecomputing.com,
gankulkarni@os.amperecomputing.com, karl.heubaum@oracle.com,
miguel.luis@oracle.com, zhukeqian1@huawei.com,
wangxiongfeng2@huawei.com, wangyanan55@huawei.com,
wangzhou1@hisilicon.com, linuxarm@huawei.com,
jiakernel2@gmail.com, maobibo@loongson.cn,
lixianglai@loongson.cn, shahuang@redhat.com, zhao1.liu@intel.com
Subject: Re: [PATCH RFC V6 00/24] Support of Virtual CPU Hotplug-like Feature for ARMv8+ Arch
Date: Wed, 22 Oct 2025 20:07:54 +1000 [thread overview]
Message-ID: <b1c0a0a8-3b94-47ee-ab8b-e42099f3f1a8@redhat.com> (raw)
In-Reply-To: <20251001010127.3092631-1-salil.mehta@opnsrc.net>
Hi Salil,
On 10/1/25 11:01 AM, salil.mehta@opnsrc.net wrote:
>
> ===================
> (VII) Commands Used
> ===================
>
> A. Qemu launch commands to init the machine (with 6 possible vCPUs):
>
> $ qemu-system-aarch64 --enable-kvm -machine virt,gic-version=3 \
> -cpu host -smp cpus=4,disabled=2 \
> -m 300M \
> -kernel Image \
> -initrd rootfs.cpio.gz \
> -append "console=ttyAMA0 root=/dev/ram rdinit=/init maxcpus=2 acpi=force" \
> -nographic \
> -bios QEMU_EFI.fd \
>
The parameter 'disabled=2' isn't correct here and it needs to be 'disabledcpus=2'.
Otherwise, the VM won't be started due to the unrecognized parameter.
$ /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \
--enable-kvm -machine virt,gic-version=3 -cpu host,sve=off \
-smp cpus=4,disabled=2 -m 1024M \
-kernel /home/gavin/sandbox/linux.guest/arch/arm64/boot/Image \
-initrd /home/gavin/sandbox/images/rootfs.cpio.xz -nographic
qemu-system-aarch64: Parameter 'smp.disabled' is unexpected
Thanks,
Gavin
next prev parent reply other threads:[~2025-10-22 10:09 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-01 1:01 [PATCH RFC V6 00/24] Support of Virtual CPU Hotplug-like Feature for ARMv8+ Arch salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 01/24] hw/core: Introduce administrative power-state property and its accessors salil.mehta
2025-10-09 10:48 ` Miguel Luis
2025-10-01 1:01 ` [PATCH RFC V6 02/24] hw/core, qemu-options.hx: Introduce 'disabledcpus' SMP parameter salil.mehta
2025-10-09 11:28 ` Miguel Luis
2025-10-09 13:17 ` Igor Mammedov
2025-10-09 11:51 ` Markus Armbruster
2025-10-28 5:48 ` Gavin Shan
2025-10-01 1:01 ` [PATCH RFC V6 03/24] hw/arm/virt: Clamp 'maxcpus' as-per machine's vCPU deferred online-capability salil.mehta
2025-10-09 12:32 ` Miguel Luis
2025-10-09 13:11 ` Igor Mammedov
2025-10-01 1:01 ` [PATCH RFC V6 04/24] arm/virt, target/arm: Add new ARMCPU {socket, cluster, core, thread}-id property salil.mehta
2025-10-28 6:24 ` [PATCH RFC V6 04/24] arm/virt,target/arm: Add new ARMCPU {socket,cluster,core,thread}-id property Gavin Shan
2025-10-01 1:01 ` [PATCH RFC V6 05/24] arm/virt, kvm: Pre-create KVM vCPUs for 'disabled' QOM vCPUs at machine init salil.mehta
2025-10-22 10:36 ` [PATCH RFC V6 05/24] arm/virt,kvm: " Gavin Shan
2025-10-22 18:18 ` Salil Mehta
2025-10-22 18:50 ` Salil Mehta
2025-10-23 0:14 ` Gavin Shan
2025-10-23 0:35 ` Salil Mehta
2025-10-23 1:29 ` Salil Mehta
2025-10-23 4:14 ` Gavin Shan
2025-10-23 11:27 ` Salil Mehta
2025-10-23 1:58 ` Gavin Shan
2025-10-23 11:17 ` Salil Mehta
2025-10-01 1:01 ` [PATCH RFC V6 06/24] arm/virt, gicv3: Pre-size GIC with possible " salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 07/24] arm/gicv3: Refactor CPU interface init for shared TCG/KVM use salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 08/24] arm/virt, gicv3: Guard CPU interface access for admin disabled vCPUs salil.mehta
2025-10-24 4:07 ` Gavin Shan
2025-10-01 1:01 ` [PATCH RFC V6 09/24] hw/intc/arm_gicv3_common: Migrate & check 'GICv3CPUState' accessibility mismatch salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 10/24] arm/virt: Init PMU at host for all present vCPUs salil.mehta
2025-10-03 15:02 ` Igor Mammedov
2025-10-01 1:01 ` [PATCH RFC V6 11/24] hw/arm/acpi: MADT change to size the guest with possible vCPUs salil.mehta
2025-10-03 15:09 ` Igor Mammedov
[not found] ` <0175e40f70424dd9a29389b8a4f16c42@huawei.com>
2025-10-07 12:20 ` Igor Mammedov
2025-10-10 3:15 ` Salil Mehta
2025-10-01 1:01 ` [PATCH RFC V6 12/24] hw/core: Introduce generic device power-state handler interface salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 13/24] qdev: make admin power state changes trigger platform transitions via ACPI salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 14/24] arm/acpi: Introduce dedicated CPU OSPM interface for ARM-like platforms salil.mehta
2025-10-03 14:58 ` Igor Mammedov
[not found] ` <7da6a9c470684754810414f0abd23a62@huawei.com>
2025-10-07 12:06 ` Igor Mammedov
2025-10-10 3:00 ` Salil Mehta
2025-10-24 4:47 ` Gavin Shan
2025-10-01 1:01 ` [PATCH RFC V6 15/24] acpi/ged: Notify OSPM of CPU administrative state changes via GED salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 16/24] arm/virt/acpi: Update ACPI DSDT Tbl to include 'Online-Capable' CPUs AML salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 17/24] hw/arm/virt, acpi/ged: Add PowerStateHandler hooks for runtime CPU state changes salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 18/24] target/arm/kvm, tcg: Handle SMCCC hypercall exits in VMM during PSCI_CPU_{ON, OFF} salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 19/24] target/arm/cpu: Add the Accessor hook to fetch ARM CPU arch-id salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 20/24] target/arm/kvm: Write vCPU's state back to KVM on cold-reset salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 21/24] hw/intc/arm-gicv3-kvm: Pause all vCPUs & cache ICC_CTLR_EL1 for userspace PSCI CPU_ON salil.mehta
2025-10-01 1:01 ` [PATCH RFC V6 22/24] monitor, qdev: Introduce 'device_set' to change admin state of existing devices salil.mehta
2025-10-09 8:55 ` [PATCH RFC V6 22/24] monitor,qdev: " Markus Armbruster
2025-10-09 12:51 ` Igor Mammedov
2025-10-09 14:03 ` Daniel P. Berrangé
2025-10-09 14:55 ` Markus Armbruster
2025-10-09 15:19 ` Peter Maydell
2025-10-10 4:59 ` Markus Armbruster
2025-10-17 14:50 ` Igor Mammedov
2025-10-20 11:22 ` Markus Armbruster
2025-10-01 1:01 ` [PATCH RFC V6 23/24] monitor, qapi: add 'info cpus-powerstate' and QMP query (Admin + Oper states) salil.mehta
2025-10-09 11:53 ` [PATCH RFC V6 23/24] monitor,qapi: " Markus Armbruster
2025-10-01 1:01 ` [PATCH RFC V6 24/24] tcg: Defer TB flush for 'lazy realized' vCPUs on first region alloc salil.mehta
2025-10-01 21:34 ` Richard Henderson
2025-10-02 12:27 ` Salil Mehta via
2025-10-02 15:41 ` Richard Henderson
2025-10-07 10:14 ` Salil Mehta via
2025-10-06 14:00 ` [PATCH RFC V6 00/24] Support of Virtual CPU Hotplug-like Feature for ARMv8+ Arch Igor Mammedov
2025-10-13 0:34 ` Gavin Shan
2025-10-22 10:07 ` Gavin Shan [this message]
2025-10-24 6:55 ` Gavin Shan
[not found] <20250930224037.224833-1-salil.mehta@huawei.com>
2025-10-01 0:22 ` Salil Mehta
2025-10-08 12:33 ` Markus Armbruster
2025-10-08 16:04 ` Miguel Luis
2025-10-09 5:42 ` Markus Armbruster
2025-10-09 9:17 ` Miguel Luis
2025-10-10 3:25 ` Salil Mehta
2025-10-10 3:21 ` Salil Mehta
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