Re: [PATCH 4/4] x86, efi: Map runtime services 1:1
On Thu, Jun 06, 2013 at 12:38:10PM -0700, H. Peter Anvin wrote: On 06/06/2013 12:36 PM, Borislav Petkov wrote: On Thu, Jun 06, 2013 at 12:28:20PM -0700, H. Peter Anvin wrote: Or we could materialize mappings for this specific PGD. However, adding a read of %cr3 in __do_page_fault sounds expensive. Yes, I think we want to make sure all mappings are there when we do an EFI runtime call so that we never #PF while it executes. Matt mentioned on IRC that the it could be that his EFI runtime is referencing EFI_RESERVED area which we don't map. However, we need to confirm/disprove that first, as it is currently only a hunch. FWIW, booting the patchset on my Dell looks good here. Booting at least, I don't know about other stuff. If you have an EFI test suite or want me to try stuff out, let me know. efibootmgr output looks sane too. Btw, I've added a printk to the code so that we know that we've managed switching to the 1:1 thing: [0.073119] efi: Using 1:1 map. 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[GIT PULL] EFI urgent fixes
Hi folks, The following changes since commit eccaf52fee8305d5207ff110950a82c100e459bc: x86, efi: initial the local variable of DataSize to zero (2013-05-14 08:13:05 +0100) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git tags/efi-urgent for you to fetch changes up to f8b8404337de4e2466e2e1139ea68b1f8295974f: Modify UEFI anti-bricking code (2013-06-10 21:59:37 +0100) * More tweaking to the EFI variable anti-bricking algorithm. Quite a few users were reporting boot regressions in v3.9. This has now been fixed with a more accurate minimum storage requirement to avoid bricking value from Samsung (5K instead of 50%) and code to trigger garbage collection when we near our limit - Matthew Garrett. Matthew Garrett (1): Modify UEFI anti-bricking code arch/x86/boot/compressed/eboot.c | 47 - arch/x86/include/asm/efi.h| 7 -- arch/x86/include/uapi/asm/bootparam.h | 1 - arch/x86/platform/efi/efi.c | 188 -- 4 files changed, 65 insertions(+), 178 deletions(-) -- Matt Fleming, Intel Open Source Technology Center -- To unsubscribe from this list: send the line unsubscribe linux-efi in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
