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config: Add toggle for bootdevice information 

Add the "BOOTDEVICES" toggle to remove boot device information received
through fw_cfg.

We will use this toggle in QEMU to reduce the size of the 128k SeaBIOS
rom, which is only used in old compat versions, where this boot device
information does not exist.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
Message-Id: <20190612093704.47175-5-shmuel.eiderman@oracle.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Sam Eiderman 2019-06-12 12:37:03 +03:00 committed by Gerd Hoffmann
parent ad2910949b
commit cb56f61c10
2 changed files with 16 additions and 0 deletions
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7
src/Kconfig
View File

@ -72,6 +72,13 @@ endchoice
help
Support controlling of the boot order via the fw_cfg/CBFS
"bootorder" file.
config BOOTDEVICES
depends on BOOT
bool "Boot device information"
default y
help
Support boot device information via the fw_cfg/CBFS
"bootdevices" file.
config COREBOOT_FLASH
depends on COREBOOT

9
src/boot.c
View File

@ -95,6 +95,9 @@ static int BootDeviceCount;
static void
loadBootDevices(void)
{
if (!CONFIG_BOOTDEVICES)
return;
BootDeviceCount = 0;
int fsize;
char *f = romfile_loadfile("bootdevices", &fsize);
@ -172,6 +175,8 @@ bootdevice_find(const char *glob)
static BootDevice *
bootdevice_find_pci_device(struct pci_device *pci)
{
if (!CONFIG_BOOTDEVICES)
return NULL;
// Find pci device - for example: /pci@i0cf8/ethernet@5
char desc[256];
build_pci_path(desc, sizeof(desc), "*", pci);
@ -181,6 +186,8 @@ bootdevice_find_pci_device(struct pci_device *pci)
static BootDevice *
bootdevice_find_scsi_device(struct pci_device *pci, int target, int lun)
{
if (!CONFIG_BOOTDEVICES)
return NULL;
if (!pci)
// support only pci machine for now
return NULL;
@ -194,6 +201,8 @@ bootdevice_find_scsi_device(struct pci_device *pci, int target, int lun)
static BootDevice *
bootdevice_find_ata_device(struct pci_device *pci, int chanid, int slave)
{
if (!CONFIG_BOOTDEVICES)
return NULL;
if (!pci)
// support only pci machine for now
return NULL;