linux-kernel - [RFC PATCH v2 2/3] virtio_pci: add a definition of queue flag in ISR

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Message-Id: <20230427104428.862643-3-mie@igel.co.jp>
Date:   Thu, 27 Apr 2023 19:44:27 +0900
From:   Shunsuke Mie <mie@...l.co.jp>
To:     Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc:     Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Shunsuke Mie <mie@...l.co.jp>, Frank Li <Frank.Li@....com>,
        Jon Mason <jdmason@...zu.us>,
        Randy Dunlap <rdunlap@...radead.org>,
        Ren Zhijie <renzhijie2@...wei.com>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: [RFC PATCH v2 2/3] virtio_pci: add a definition of queue flag in ISR

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>
---
 include/uapi/linux/virtio_pci.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
index f703afc7ad31..d405bea27240 100644
--- a/include/uapi/linux/virtio_pci.h
+++ b/include/uapi/linux/virtio_pci.h
@@ -94,6 +94,9 @@
 
 #endif /* VIRTIO_PCI_NO_LEGACY */
 
+/* Bits for ISR status field:only when if MSI-X is disabled */
+/* The bit of the ISR which indicates a queue entry update. */
+#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