> Thanks Sai for this work. I think this a step in the right direction. > I tested this on qemu x86_64 with OVMF firmware modified to access some > random address in the EFI_Reserved_Region. I was able to reboot the qemu > instance successfully with the patches (see logs below) while without the > patchset, reboot earlier used to get stuck. > > So, feel free to add: > Tested-by: Bhupesh Sharma <bhsharma@xxxxxxxxxx> > Thanks a lot Bhupesh, for trying the patches and as you said, the patches need a lot more testing on real machines. > Qemu Console Logs: > --------------------------- > > # reboot > > <snip..> > > [ 11.400004] ------------[ cut here ]------------ > [ 11.400137] [Firmware Bug]: Page fault caused by firmware at PA: 0x7e924100 > [ 11.400484] WARNING: CPU: 0 PID: 1111 at > arch/x86/platform/efi/quirks.c:691 > efi_recover_from_page_fault+0x3b/0xf0 > [ 11.400751] Modules linked in: > [ 11.400992] CPU: 0 PID: 1111 Comm: init Not tainted 4.18.0-rc5+ #1 > [ 11.401146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), > BIOS 0.0.0 02/06/2015 > [ 11.401397] RIP: 0010:efi_recover_from_page_fault+0x3b/0xf0 [snipped stack trace] > [ 11.410378] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 11.410554] ---[ end trace ad3d0a220a88a45b ]--- > [ 11.410742] efi: efi_reset_system() buggy! Reboot through BIOS Thanks for the log, it looks good to me.
