Some hardened gcc v9 compilers (such as the one in Ubuntu)
default this option which for seabios leads to emulation errors
when running in KVM (does not trigger in TCG) on older intel
chips of the Penryn generation (~2006-2008).
Symptom in KVM looks like:
KVM internal error. Suberror: 1
Use bootorder fw_cfg file to find bootable virtio-mmio devices.
Also add a new virtio-mmio.c source file, providing a function
to register virtio-mmio devices.
Signed-off-by: Gerd Hoffmann
---
Makefile | 2 +-
src/hw/virtio-mmio.h | 6 ++
src/fw/paravirt.c| 24
qemu got a new "microvm" machine type which has no pci support.
virtio-mmio is used for devices instead. This series adds
support for virtio-mmio devices to seabios to allow booting
from block and scsi devices.
Gerd Hoffmann (6):
string: add strtol() implementation
paravirt/qemu: virtio-mmio
Add support for virtio-mmio to the vp_*() helper functions.
Both legacy and 1.0 virto-mmio versions are supported. They
are very simliar anyway, only the virtqueue initialization
is slightly different.
Signed-off-by: Gerd Hoffmann
---
src/hw/virtio-pci.c | 68
Add and use bootprio_find_mmio_device() to figure
the boot priority of virtio-mmio block devices.
Add init_virtio_blk_mmio to initialize one
virtio-mmio block device.
Signed-off-by: Gerd Hoffmann
---
src/hw/virtio-blk.h | 1 +
src/util.h | 1 +
src/boot.c | 9 ++
Add support for pci config space access via mmconfig bar. Enable for
qemu q35 chipset. Main advantage is that we need only one instead of
two io operations per config space access, which translates to one
instead of two vmexits for virtualization.
Signed-off-by: Gerd Hoffmann
---
src/hw/pci.h
On Thu, Mar 19, 2020 at 10:21:55AM +0100, Gerd Hoffmann wrote:
> Add support for pci config space access via mmconfig bar. Enable for
> qemu q35 chipset. Main advantage is that we need only one instead of
> two io operations per config space access, which translates to one
> instead of two
Add virtio_mmio_setup() to probe virtio mmio devices. Add
vp_init_mmio() to initialize device struct. Because virtio-pci and
virtio-mmio are quite simliar we reuse the infrastructure we already
have for virtio-pci and just setup struct vp_cap for virtio-mmio.
Signed-off-by: Gerd Hoffmann
---
Add new fields to struct virtio_lun_s for mmio support,
add mmio parameter to virtio_scsi_init_lun(), so both
pci and mmio devices can be handled.
Add and use bootprio_find_scsi_mmio_device() to figure
boot priority of devices connected to a virtio-mmio
scsi controller.
Finally add
Signed-off-by: Gerd Hoffmann
---
src/string.h | 1 +
src/string.c | 25 +
2 files changed, 26 insertions(+)
diff --git a/src/string.h b/src/string.h
index d069989db4b4..17ef3c6a1e89 100644
--- a/src/string.h
+++ b/src/string.h
@@ -27,5 +27,6 @@ void *memmove(void *d,
On Thu, Mar 19, 2020 at 08:39:33AM +0100, Gerd Hoffmann wrote:
> Use bootorder fw_cfg file to find bootable virtio-mmio devices.
> Also add a new virtio-mmio.c source file, providing a function
> to register virtio-mmio devices.
Can you expand on this? I'm not sure I understand what this patch
> > +static void *pci_mmconfig_addr(u16 bdf, u32 addr)
> > +{
> > +if (!mmconfig)
> > +return NULL;
> > +return (void*)(mmconfig + ((u32)bdf << 12) + addr);
> > +}
> > +
> > void pci_config_writel(u16 bdf, u32 addr, u32 val)
> > {
> > -outl(0x8000 | (bdf << 8) | (addr &
On 2020-03-19, Christian Ehrhardt wrote:
Some hardened gcc v9 compilers (such as the one in Ubuntu)
default this option which for seabios leads to emulation errors
when running in KVM (does not trigger in TCG) on older intel
chips of the Penryn generation (~2006-2008).
Symptom in KVM looks
On Thu, Mar 19, 2020 at 10:21:55AM +0100, Gerd Hoffmann wrote:
> Add support for pci config space access via mmconfig bar. Enable for
> qemu q35 chipset. Main advantage is that we need only one instead of
> two io operations per config space access, which translates to one
> instead of two
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