SeaBIOS Git Change Log

Age Message
5 days 11 hours nvme: Use the Maximum Queue Entries Supported (MQES) to initialize I/O queues

Use the Maximum Queue Entries Supported (MQES) to initialize I/O queues
depth rather than picking a fixed number (256) which might not be
supported by some NVMe controllers (the NVMe specification says that an
NVMe controller may support any number between 2 to 4096).

Still cap the I/O queues depth to 256 since, during my testing, SeaBIOS
was running out of memory when using something higher than 256 (4096 on
the NVMe controller that I've had a chance to try).

Signed-off-by: Filippo Sironi <>
Commit cd47172a673762a05a0c7bd27df6e3cc8febe8d6, by Filippo Sironi
13 days 18 hours xhci: Verify the device is still present in xhci_cmd_submit()

Make sure the USB device is still present before altering the xhci
"slot" for it. It appears some controllers will hang if a request is
sent to a port no longer connected.

Signed-off-by: Kevin O'Connor <>
13 days 19 hours nvme: fix out of memory behavior

If the allocation of I/O queues ran out of memory, the code would fail to detect
that and happily use these queues at address zero. For me this happens for
systems with more than 7 NVMe controllers.

Fix the out of memory handling to gracefully handle this case.

Signed-off-by: Julian Stecklina <>
Commit f703604b30958312e64a5b7fc74c606a2ececc15, by Julian Stecklina
13 days 19 hours xhci: Build TRBs directly in xhci_trb_queue()

Use the logic for building a 'struct xhci_trb' that was in
xhci_xfer_queue() up so that command and ring TRBs can also use that
functionality. This eliminates the need to manually generate the
xhci_trb struct from those code paths.

Signed-off-by: Kevin O'Connor <>
3 months 5 days virtio: Allocate drive_s storage in low memory

Use the "low" memory segment instead of the f-segment for the drive_s
storage. This can help avoid running out of memory in the f-segment.

Tested-by: Paolo Bonzini <>
Signed-off-by: Kevin O'Connor <>
3 months 5 days block: Rename disk_op_s->drive_gf to drive_fl

Now that the drive_s struct does not need to be in the f-segment,
rename references to drive_gf in the generic drive code to drive_fl.

This is just variable renames - no code changes.

Tested-by: Paolo Bonzini <>
Signed-off-by: Kevin O'Connor <>
3 months 5 days disk: Don't require the 'struct drive_s' to be in the f-segment

Allow the 'struct drive_s' drive description structure to be in either
the "low" memory segment or the f-segment.

Tested-by: Paolo Bonzini <>
Signed-off-by: Kevin O'Connor <>
3 months 5 days boot: Rename drive_g to drive

The 'struct drive_s' pointer is a 32bit pointer (and boot.c code is
only compiled in 32bit mode), so avoid using the "_g" suffix on the

Tested-by: Paolo Bonzini <>
Signed-off-by: Kevin O'Connor <>
29 days 59 minutes add serial console support

Redirect int10 calls to serial console output.
Parse serial input and queue key events.
The serial console can work both as primary display
and in parallel to another vga display (splitmode).

Signed-off-by: Gerd Hoffmann <>
29 days 59 minutes paravirt: serial console configuration.

Read QEMU_CFG_NOGRAPHIC, if set add etc/sercon-port
file to enable the serial console.

Signed-off-by: Gerd Hoffmann <>
29 days 59 minutes romfile: add support for constant files.

Signed-off-by: Gerd Hoffmann <>
29 days 59 minutes kbd: make enqueue_key public, add ascii_to_keycode

serial console wants queue key events and needs to map ascii chars to
the keycode, so make enqueue_key public and also exports a helper
function so sercon can use the scan_to_keycode mapping table.

Signed-off-by: Gerd Hoffmann <>
29 days 59 minutes std: add cp437 to unicode map

Signed-off-by: Gerd Hoffmann <>
1 month 29 days pci: enable RedHat PCI bridges to reserve additional resources on PCI init

In case of Red Hat Generic PCIE Root Port reserve additional buses
and/or IO/MEM/PREF space, which values are provided in a vendor-specific capability.

Signed-off-by: Aleksandr Bezzubikov <>
Reviewed-by: Marcel Apfelbaum <>
Commit ec6cb17f89498bcd6123e50a0368a414e6e85d82, by Aleksandr Bezzubikov
1 month 29 days pci: add QEMU-specific PCI capability structure

On PCI init PCI bridge devices may need some
extra info about bus number to reserve, IO, memory and
prefetchable memory limits. QEMU can provide this
with special vendor-specific PCI capability.

This capability is intended to be used only
for Red Hat PCI bridges, i.e. QEMU cooperation.

Signed-off-by: Aleksandr Bezzubikov <>
Reviewed-by: Marcel Apfelbaum <>
Commit 4c1f7272b41df5ceec0f41c6c14ca4c68a8638ee, by Aleksandr Bezzubikov
1 month 29 days pci: refactor pci_find_capapibilty to get bdf as the first argument instead of the whole pci_device

Refactor pci_find_capability function to get bdf instead of
a whole pci_device* as the only necessary field for this function
is still bdf.

Signed-off-by: Aleksandr Bezzubikov <>
Reviewed-by: Marcel Apfelbaum <>
Commit 7de1f65c0cf1e11ee3fa580d59eb7acdd0c42ad9, by Aleksandr Bezzubikov
1 month 14 days tcgbios: Fix use of unitialized variable

Review-by: Stefan Berger <>
Signed-off-by: Kevin O'Connor <>
3 months 5 days docs: Fix typos in

Reviewed-by: Paul Menzel <>
Signed-off-by: Kevin O'Connor <>
1 month 17 days vga: Fix bug in stdvga_get_linesize()

Add required GET_GLOBAL() macro to vmode_g access.

Signed-off-by: Kevin O'Connor <>
2 months 28 days usb-xhci: use hub portmap

xhci controllers have two virtual ports per (usb3 capable) physical
port, one for usb2 and one for usb3 devices. Add a hub portmap callback
to map the virtual ports to physical ports.

Signed-off-by: Gerd Hoffmann <>
2 months 28 days usb: add hub portmap

Allow usb hubs to map (software) ports to physical ports via op
callback. This is needed to make bootorder work in case there
isn't a simple linear mapping.

Signed-off-by: Gerd Hoffmann <>
3 months 12 days virtio: IOMMU support

Since we don't enable IOMMU at all, we can then simply enable the
IOMMU support by claiming the support of VIRITO_F_IOMMU_PLATFORM. This
fixes booting failure when iommu_platform is set from qemu cli.

Acked-by: Michael S. Tsirkin <>
Signed-off-by: Jason Wang <>
3 months 24 days ahci: Disable Native Command Queueing

The AHCI driver currently sets the NCQ bit for every command that is
issued to the SATA drive. This is not needed as there is always only
one command active at a time and in turn can lead to a hanging AHCI
controller (true for Marvel 88SE9170). The following patch disables
the usage of NCQ completely. With this patch the Marvel AHCI
controller works just fine without any issues.

Signed-off-by: Kevin O'Connor <>
4 months 4 days nvme: Enable NVMe support for non-qemu hardware

NVMe support was tested on purism/librem13 laptops and SeaBIOS has
no problems in detecting and booting the drives.

This is a continuation of commit 235a8190 which was incomplete.

Signed-off-by: Youness Alaoui <>
Signed-off-by: Kevin O'Connor <>
Commit 7759d3a5be049eb8d0b4f7c6b1f1a0ba5e871cf3, by Youness Alaoui
4 months 17 days SeaVGABios/cbvga: Advertise compatible VESA modes

Advertise compatible VESA modes, that are smaller or equal to
coreboot's active framebuffer. Only modes that have the same Bpp
are advertise and can be selected.

Allows the Windows 7 bootloader NTLDR to show up in VESA mode.
Allows to show the Windows 7 boot logo.
Allows Windows to boot in safe mode and in normal boot using
VgaSave driver with resolution up to 1600x1200.

This fixes most likely other bootloader and operating systems as well,
in case the are relying on VESA framebuffer support.

Signed-off-by: Patrick Rudolph <>
Commit e30d51cc58065513279cbe3288108555240e7c44, by Patrick Rudolph