linux-kernel - Re: [RFC PATCH 1/4] virtio_pci: add a definition of queue flag in ISR

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Message-ID: <20230203051445-mutt-send-email-mst@kernel.org>
Date:   Fri, 3 Feb 2023 05:16:45 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Shunsuke Mie <mie@...l.co.jp>
Cc:     Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jason Wang <jasowang@...hat.com>, Frank Li <Frank.Li@....com>,
        Jon Mason <jdmason@...zu.us>,
        Ren Zhijie <renzhijie2@...wei.com>,
        Takanari Hayama <taki@...l.co.jp>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [RFC PATCH 1/4] virtio_pci: add a definition of queue flag in ISR

On Fri, Feb 03, 2023 at 07:04:15PM +0900, Shunsuke Mie wrote:
> Already it has beed defined a config changed flag of ISR, but not the queue
> flag. Add a macro for it.
> 
> Signed-off-by: Shunsuke Mie <mie@...l.co.jp>
> Signed-off-by: Takanari Hayama <taki@...l.co.jp>
> ---
>  include/uapi/linux/virtio_pci.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
> index f703afc7ad31..fa82afd6171a 100644
> --- a/include/uapi/linux/virtio_pci.h
> +++ b/include/uapi/linux/virtio_pci.h
> @@ -94,6 +94,8 @@
>  
>  #endif /* VIRTIO_PCI_NO_LEGACY */
>  
> +/* Ths bit of the ISR which indicates a queue entry update */

typo

Something to add here:
	Note: only when MSI-X is disabled



> +#define VIRTIO_PCI_ISR_QUEUE		0x1
>  /* The bit of the ISR which indicates a device configuration change. */
>  #define VIRTIO_PCI_ISR_CONFIG		0x2
>  /* Vector value used to disable MSI for queue */
> -- 
> 2.25.1