On Mon, Apr 30, 2007 at 11:45:36AM -0700, David Brown wrote:
> > Host cpu type, host bitness, guest bitness, and qemu command line please.
> >
>
> [EMAIL PROTECTED]:~# cat /root/bin/start-debian
> #!/bin/bash
>
> KVER="2.6.18-4-686"
> INITRD_BASE="initrd"
> INITRD_APPEND=".img"
> APPEND="ro root=/dev/hda1"
> DEV=mapper/VolGroup00-debian
> BOOT=mapper/VolGroup00-debian--boot
>
> qemu -kernel "/root/boot/vmlinuz-${KVER}" \
> -initrd "/root/boot/${INITRD_BASE}${INITRD_APPEND}-${KVER}" \
> -append "${APPEND}" \
> -m 512 --no-rtc \
> \
> -usb \
> -soundhw es1370 \
> -net nic,vlan0,macaddr=52:54:56:34:12:00 \
> -net tap,vlan=0,ifname=tap0 \
> -hdb "/dev/$BOOT" \
> /dev/$DEV
> [EMAIL PROTECTED]:~#
How big is your initrd image ? There was a QEMU bug which causes the
end of the initrd to be overwritten by the kernel if the initd was
larger than 1 MB IIRC. Upstream QEMU CVS has the patch, but the current
KVM SVN repo does not seem to have it. I'm attaching the patch we applied
to KVM-19's copy of QEMU in Fedora to fix, although it doesn't apply cleanly
to current KVM dev.
Regards,
Dan.
--
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Index: hw/pc.c
===================================================================
RCS file: /sources/qemu/qemu/hw/pc.c,v
retrieving revision 1.71
retrieving revision 1.72
diff -u -p -r1.71 -r1.72
--- hw/pc.c 5 Mar 2007 19:44:02 -0000 1.71
+++ hw/pc.c 31 Mar 2007 19:41:22 -0000 1.72
@@ -32,9 +32,11 @@
#define LINUX_BOOT_FILENAME "linux_boot.bin"
#define KERNEL_LOAD_ADDR 0x00100000
-#define INITRD_LOAD_ADDR 0x00600000
+#define MAX_INITRD_LOAD_ADDR 0x38000000
#define KERNEL_PARAMS_ADDR 0x00090000
#define KERNEL_CMDLINE_ADDR 0x00099000
+/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */
+#define ACPI_DATA_SIZE 0x10000
static fdctrl_t *floppy_controller;
static RTCState *rtc_state;
@@ -452,6 +454,7 @@ static void pc_init1(int ram_size, int v
char buf[1024];
int ret, linux_boot, initrd_size, i;
ram_addr_t ram_addr, vga_ram_addr, bios_offset, vga_bios_offset;
+ ram_addr_t initrd_offset;
int bios_size, isa_bios_size, vga_bios_size;
PCIBus *pci_bus;
int piix3_devfn = -1;
@@ -599,8 +602,28 @@ static void pc_init1(int ram_size, int v
/* load initrd */
initrd_size = 0;
+ initrd_offset = 0;
if (initrd_filename) {
- initrd_size = load_image(initrd_filename, phys_ram_base +
INITRD_LOAD_ADDR);
+ initrd_size = get_image_size (initrd_filename);
+ if (initrd_size > 0) {
+ initrd_offset = (ram_size - initrd_size) & TARGET_PAGE_MASK;
+ /* Leave space for BIOS ACPI tables. */
+ initrd_offset -= ACPI_DATA_SIZE;
+ /* Avoid the last 64k to avoid 2.2.x kernel bugs. */
+ initrd_offset -= 0x10000;
+ if (initrd_offset > MAX_INITRD_LOAD_ADDR)
+ initrd_offset = MAX_INITRD_LOAD_ADDR;
+
+ if (initrd_size > ram_size
+ || initrd_offset < KERNEL_LOAD_ADDR + ret) {
+ fprintf(stderr,
+ "qemu: memory too small for initial ram disk
'%s'\n",
+ initrd_filename);
+ exit(1);
+ }
+ initrd_size = load_image(initrd_filename,
+ phys_ram_base + initrd_offset);
+ }
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load initial ram disk
'%s'\n",
initrd_filename);
@@ -608,7 +631,7 @@ static void pc_init1(int ram_size, int v
}
}
if (initrd_size > 0) {
- stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218,
INITRD_LOAD_ADDR);
+ stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x218, initrd_offset);
stl_raw(phys_ram_base + KERNEL_PARAMS_ADDR + 0x21c, initrd_size);
}
pstrcpy(phys_ram_base + KERNEL_CMDLINE_ADDR, 4096,
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