Messages in this thread | | | Date | Thu, 30 Aug 2018 09:19:51 +0200 | From | Joerg Roedel <> | Subject | Re: efi boot failures due to PTI with 32 bit builds and Intel CPUs |
| |
Hey Guenter,
On Wed, Aug 29, 2018 at 01:16:59PM -0700, Guenter Roeck wrote: > I see boot failures on mainline when trying to boot x86 images with an efi > bios on Intel CPUs in qemu. Behavior is quite unusual: qemu dies silently > after the kernel displays "Run /sbin/init as init process". With debugging > enabled, qemu reports a CR3 update followed by a triple fault. > Here is the end of the log file: > > ---------------- > IN: > 0xc75f1d1a: 66 90 nop > 0xc75f1d1c: 0f 20 d8 movl %cr3, %eax > 0xc75f1d1f: 0d 00 10 00 00 orl $0x1000, %eax > 0xc75f1d24: 0f 22 d8 movl %eax, %cr3 > > CR3 update: CR3=0e39b000
Thanks for the bug report, from a quick glance it looks like the kernel is switching to an empty page-table. But I need to debug that further.
> qemu-system-i386 -kernel arch/x86/boot/bzImage -M q35 -cpu core2duo \ > -no-reboot -m 256 \ > -bios OVMF-pure-efi-32.fd \ > -usb -device usb-storage,drive=d0 \ > -drive file=rootfs.ext2,if=none,id=d0,format=raw \ > --append 'root=/dev/sda rw rootwait mem=256M console=ttyS0 console=tty noreboot' \ > -nographic
Can you please provide the exact OVMF-pure-efi-32.fd image and the .config of the kernel?
Thanks a lot,
Joerg
| |