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Commit 8e709469 authored by Rusty Russell's avatar Rusty Russell
Browse files

lguest: add a dummy PCI host bridge. 



Otherwise Linux fails to find the bus.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 3e0e5f26

tools/lguest/lguest.c

+14 −0
Original line number Original line Diff line number Diff line
@@ -1238,6 +1238,17 @@ static void handle_output(unsigned long addr) 
 * code.

 * code.

 */

 */





/* Linux expects a PCI host bridge: ours is a dummy, and first on the bus. */

static struct device pci_host_bridge;



static void init_pci_host_bridge(void)

{

	pci_host_bridge.name = "PCI Host Bridge";

	pci_host_bridge.config.class = 0x06; /* bridge */

	pci_host_bridge.config.subclass = 0; /* host bridge */

	devices.pci[0] = &pci_host_bridge;

}



/* The IO ports used to read the PCI config space. */

/* The IO ports used to read the PCI config space. */

#define PCI_CONFIG_ADDR 0xCF8

#define PCI_CONFIG_ADDR 0xCF8

#define PCI_CONFIG_DATA 0xCFC

#define PCI_CONFIG_DATA 0xCFC
@@ -3007,6 +3018,9 @@ int main(int argc, char *argv[]) 
	/* We always have a console device */

	/* We always have a console device */

	setup_console();

	setup_console();





	/* Initialize the (fake) PCI host bridge device. */

	init_pci_host_bridge();



	/* Now we load the kernel */

	/* Now we load the kernel */

	start = load_kernel(open_or_die(argv[optind+1], O_RDONLY));

	start = load_kernel(open_or_die(argv[optind+1], O_RDONLY));