From: Paolo Bonzini <pbonzini@redhat.com>
To: Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
peter.maydell@linaro.org, alex.bennee@linaro.org,
qemu-devel@nongnu.org, qemu-arm@nongnu.org
Cc: quic_tsoni@quicinc.com, quic_pheragu@quicinc.com,
quic_eberman@quicinc.com, quic_yvasi@quicinc.com,
quic_cvanscha@quicinc.com, quic_mnalajal@quicinc.com
Subject: Re: [RFC/PATCH v0 00/12] Gunyah hypervisor support
Date: Wed, 18 Oct 2023 18:40:25 +0200 [thread overview]
Message-ID: <244c53a4-e727-44a8-ba30-598a1e43c1a8@redhat.com> (raw)
In-Reply-To: <20231011165234.1323725-1-quic_svaddagi@quicinc.com>
On 10/11/23 18:52, Srivatsa Vaddagiri wrote:
> Gunyah is an open-source Type-1 hypervisor, that is currently supported on ARM64
> architecture. Source code for it can be obtained from:
>
> https://github.com/quic/gunyah-hypervisor.
>
> This patch series adds support for Gunyah hypervisor via a new
> accelerator option, 'gunyah'. This patch series is based on the Linux kernel's
> Gunyah driver, which is being actively developed and not yet merged upstream
> [1].
>
> This patch series is thus *NOT YET READY* for merge. Early version of this patch
> is being published to solicit comments from Qemu community.
>
> This patch has been tested with the open-source version of Gunyah hypervisor.
> Instructions to build hypervisor and test this patch are provided in this
> patch series.
>
> Limitations:
>
> 1) SMP is not yet supported. This restriction will be removed in the next version
> of this patch series.
>
> 2) virtio-pci is not yet supported. hw/virtio/virtio-pci.c seems to support only
> KVM and would need changes to support other hypervisors. If there is any ongoing
> work in this regard, would like to build upon it and add support for Gunyah
> hypervisor.
virtio-pci does support other hypervisors; what is not yet supported is
cross-hypervisor support for IRQFD[1]. This is more of a QEMU issue
than something specific to virtio-pci. The way to fix it is to add
wrappers for kvm_irqchip_add_irqfd_notifier_gsi and
kvm_irqchip_remove_irqfd_notifier_gsi to AccelOpsClass, and move the
stub implementations in accel/stubs/kvm-stub.c to the abstract
superclass. Then you can switch the users of these KVM functions to the
AccelOpsClass wrapper.
By the way I've just posted a series to remove support for really really
old kernels, and this should remove more KVM-specific code from device
models.
Paolo
[1] a Linux eventfd (or QEMU EventNotifier) that triggers a guest
interrupt when it becomes readable. QEMU writes to the eventfd and the
kernel responds by injecting the interrupt
prev parent reply other threads:[~2023-10-18 16:41 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-11 16:52 [RFC/PATCH v0 00/12] Gunyah hypervisor support Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 01/12] hw/arm/virt: Avoid NULL pointer de-reference Srivatsa Vaddagiri
2023-10-12 4:30 ` Philippe Mathieu-Daudé
2023-10-12 5:02 ` Markus Armbruster
2023-10-12 12:24 ` Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 02/12] update-linux-headers: Include gunyah.h Srivatsa Vaddagiri
2023-10-11 16:57 ` Srivatsa Vaddagiri
2023-11-29 16:44 ` Alex Bennée
2023-12-01 10:35 ` Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 03/12] gunyah: Basic support Srivatsa Vaddagiri
2023-10-12 4:33 ` Philippe Mathieu-Daudé
2023-10-12 11:32 ` Alex Bennée
2023-10-12 12:24 ` Srivatsa Vaddagiri
2023-11-29 16:56 ` Alex Bennée
2023-12-01 10:33 ` Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 04/12] gunyah: Add VM properties Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 05/12] gunyah: Support memory assignment Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 06/12] gunyah: Add IRQFD and IOEVENTFD functions Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 07/12] gunyah: Add gicv3 interrupt controller Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 08/12] gunyah: Specific device-tree location Srivatsa Vaddagiri
2023-10-12 4:35 ` Philippe Mathieu-Daudé
2023-10-11 16:52 ` [RFC/PATCH v0 09/12] gunyah: Customize device-tree Srivatsa Vaddagiri
2023-10-12 4:36 ` Philippe Mathieu-Daudé
2023-10-11 16:52 ` [RFC/PATCH v0 10/12] gunyah: CPU execution loop Srivatsa Vaddagiri
2023-10-12 4:43 ` Philippe Mathieu-Daudé
2023-10-12 12:25 ` Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 11/12] gunyah: Workarounds (NOT FOR MERGE) Srivatsa Vaddagiri
2023-10-11 16:52 ` [RFC/PATCH v0 12/12] gunyah: Documentation Srivatsa Vaddagiri
2023-10-12 4:52 ` Philippe Mathieu-Daudé
2023-10-12 12:33 ` Srivatsa Vaddagiri
2023-10-12 14:55 ` Alex Bennée
2023-10-17 9:21 ` Srivatsa Vaddagiri
2023-10-18 15:54 ` Alex Bennée
2023-10-18 16:40 ` Paolo Bonzini [this message]
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