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[PATCH v2 5/7] vdpa: Store x-svq parameter in VhostVDPAState
From: |
Eugenio Pérez |
Subject: |
[PATCH v2 5/7] vdpa: Store x-svq parameter in VhostVDPAState |
Date: |
Fri, 22 Jul 2022 15:43:16 +0200 |
CVQ can be shadowed two ways:
- Device has x-svq=on parameter (current way)
- The device can isolate CVQ in its own vq group
QEMU needs to check for the second condition dynamically, because CVQ
index is not known at initialization time. Since this is dynamic, the
CVQ isolation could vary with different conditions, making it possible
to go from "not isolated group" to "isolated".
Saving the cmdline parameter in an extra field so we never disable CVQ
SVQ in case the device was started with cmdline.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
net/vhost-vdpa.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 8203200c2a..6c1c64f9b1 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -36,6 +36,9 @@ typedef struct VhostVDPAState {
/* Control commands shadow buffers */
void *cvq_cmd_out_buffer, *cvq_cmd_in_buffer;
+
+ /* The device always have SVQ enabled */
+ bool always_svq;
bool started;
} VhostVDPAState;
@@ -565,6 +568,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState
*peer,
s->vhost_vdpa.device_fd = vdpa_device_fd;
s->vhost_vdpa.index = queue_pair_index;
+ s->always_svq = svq;
s->vhost_vdpa.shadow_vqs_enabled = svq;
s->vhost_vdpa.iova_tree = iova_tree;
if (!is_datapath) {
--
2.31.1
- [PATCH v2 0/7] ASID support in vhost-vdpa net, Eugenio Pérez, 2022/07/22
- [PATCH v2 1/7] linux-headers: Update kernel headers to v5.19-rc1, Eugenio Pérez, 2022/07/22
- [PATCH v2 3/7] vdpa: Allocate SVQ unconditionally, Eugenio Pérez, 2022/07/22
- [PATCH v2 2/7] vdpa: Use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop, Eugenio Pérez, 2022/07/22
- [PATCH v2 5/7] vdpa: Store x-svq parameter in VhostVDPAState,
Eugenio Pérez <=
- [PATCH v2 6/7] vhost_net: Add NetClientInfo prepare callback, Eugenio Pérez, 2022/07/22
- [PATCH v2 4/7] vdpa: Add asid parameter to vhost_vdpa_dma_map/unmap, Eugenio Pérez, 2022/07/22
- [PATCH v2 7/7] vdpa: Always start CVQ in SVQ mode, Eugenio Pérez, 2022/07/22