On 09/22/13 at 10:00pm, Dave Young wrote: > On 09/22/13 at 03:37pm, Borislav Petkov wrote: > > On Sun, Sep 22, 2013 at 08:35:15PM +0800, Dave Young wrote: > > > I tested your new patch, it works both with efi stub and grub boot in > > > 1st kernel. > > > > Good, thanks! > > > > > But it paniced in kexec boot with my kexec related patcheset, the patchset > > > > That's the second kernel, right? > > Yes, it's 2nd kernel. > > > > > > contains 3 patch: > > > 1. introduce cmdline kexecboot=<0|1|2>; 1 == kexec, 2 == kdump > > > 2. export physical addr fw_vendor, runtime, tables to /sys/firmware/efi/systab > > > 3. if kexecboot != 0, use fw_vendor, runtime, tables from bootparams; Also do not > > > call SetVirtualAddressMao in case kexecboot. > > > > > > The panic happens at the last line of efi_init: > > > /* clean DUMMY object */ > > > efi.set_variable(efi_dummy_name, &EFI_DUMMY_GUID, > > > EFI_VARIABLE_NON_VOLATILE | > > > EFI_VARIABLE_BOOTSERVICE_ACCESS | > > > EFI_VARIABLE_RUNTIME_ACCESS, > > > 0, NULL); > > > > > > Below is the dmesg: > > > [ 0.003359] pid_max: default: 32768 minimum: 301 > > > [ 0.004792] BUG: unable to handle kernel paging request at fffffffefde97e70 > > > [ 0.006666] IP: [<ffffffff8103a1db>] virt_efi_set_variable+0x40/0x54 > > > [ 0.006666] PGD 36981067 PUD 35828063 PMD 0 > > > > Here it is - fffffffefde97e70 is not mapped in the pagetable, PMD is 0. > > > > Ok, can you upload your patches somewhere and tell me exactly how to > > reproduce this so that I can take a look too? > > Ok, will put somewhere after a little cleanup today. Here it is: https://people.redhat.com/ruyang/kexec-efi/for-bp/ userspace patches are also necessary, they are under kexec-tools-patches/ Just test with below steps: kexec -l /boot/vmlinuz-3.12.0-rc1+ --reuse-cmdline --append "kexecboot=1" kexec -e > > > > > Thanks. > > > > -- > > Regards/Gruss, > > Boris. > > > > Sent from a fat crate under my desk. Formatting is fine. > > -- -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
