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vfio/pci: Pass an error object to vfio_populate_vga

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Pass an error object to prepare for the same operation in
vfio_populate_device. Eventually this contributes to the migration
to VFIO-PCI realize.

We now report an error on vfio_get_region_info failure.

vfio_probe_igd_bar4_quirk is not involved in the migration to realize
and simply calls error_reportf_err.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Eric Auger 2016-10-17 10:57:57 -06:00 committed by Alex Williamson
parent 426ec9049e
commit cde4279baa
3 changed files with 16 additions and 9 deletions
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4
hw/vfio/pci-quirks.c
View file

@ -1363,6 +1363,7 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
uint64_t *bdsm_size;
uint32_t gmch;
uint16_t cmd_orig, cmd;
Error *err = NULL;
/*
* This must be an Intel VGA device at address 00:02.0 for us to even
@ -1464,7 +1465,8 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
* try to enable it. Probably shouldn't be using legacy mode without VGA,
* but also no point in us enabling VGA if disabled in hardware.
*/
if (!(gmch & 0x2) && !vdev->vga && vfio_populate_vga(vdev)) {
if (!(gmch & 0x2) && !vdev->vga && vfio_populate_vga(vdev, &err)) {
error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name);
error_report("IGD device %s failed to enable VGA access, "
"legacy mode disabled", vdev->vbasedev.name);
goto out;

19
hw/vfio/pci.c
View file

@ -2134,7 +2134,7 @@ static VFIODeviceOps vfio_pci_ops = {
.vfio_eoi = vfio_intx_eoi,
};
int vfio_populate_vga(VFIOPCIDevice *vdev)
int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
{
VFIODevice *vbasedev = &vdev->vbasedev;
struct vfio_region_info *reg_info;
@ -2142,15 +2142,18 @@ int vfio_populate_vga(VFIOPCIDevice *vdev)
ret = vfio_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDEX, &reg_info);
if (ret) {
error_setg_errno(errp, -ret,
"failed getting region info for VGA region index %d",
VFIO_PCI_VGA_REGION_INDEX);
return ret;
}
if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) ||
!(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) ||
reg_info->size < 0xbffff + 1) {
error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
(unsigned long)reg_info->flags,
(unsigned long)reg_info->size);
error_setg(errp, "unexpected VGA info, flags 0x%lx, size 0x%lx",
(unsigned long)reg_info->flags,
(unsigned long)reg_info->size);
g_free(reg_info);
return -EINVAL;
}
@ -2205,6 +2208,7 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
struct vfio_region_info *reg_info;
struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
int i, ret = -1;
Error *err = NULL;
/* Sanity check device */
if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
@ -2259,10 +2263,11 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
g_free(reg_info);
if (vdev->features & VFIO_FEATURE_ENABLE_VGA) {
ret = vfio_populate_vga(vdev);
ret = vfio_populate_vga(vdev, &err);
if (ret) {
error_report(
"vfio: Device does not support requested feature x-vga");
error_append_hint(&err, "device does not support "
"requested feature x-vga\n");
error_reportf_err(err, ERR_PREFIX, vdev->vbasedev.name);
goto error;
}
}

2
hw/vfio/pci.h
View file

@ -161,7 +161,7 @@ void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr);
void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr);
void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev);
int vfio_populate_vga(VFIOPCIDevice *vdev);
int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);
int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
struct vfio_region_info *info);