From: Borislav Petkov <bp@xxxxxxx> Hi all, here's finally a new version of the runtime services VA mapping patchset which hopefully implements hpa's idea of statically mapping EFI runtime regions in a top-down manner starting at -4Gb virtual. We're also using a different pagetable so as not to pollute kernel address space. For that, we switch to that table before doing an EFI call, and afterwards we switch back to the previous one. To the patches: 1-2 are simple cleanups which Matt probably can take now 3-10 add the machinery to map regions into an arbitrary PGD. Those I've split deliberately into very small bites so that they can be reviewed more thoroughly and easily for my pagetable skills are pretty basic. 11 is the actual patch which implements that mapping so that we can use runtime services in kexec (which is the whole reason for this fuss :)) So please take a long hard look at those, hammer on them on your boxes and let me know. They boot fine on my Dell UEFI box and in OVMF (obviously :)). Thanks. Borislav Petkov (11): efi: Simplify EFI_DEBUG efi: Remove EFI_PAGE_SHIFT and EFI_PAGE_SIZE x86, pageattr: Lookup address in an arbitrary PGD x86, pageattr: Add a PGD pagetable populating function x86, pageattr: Add a PUD pagetable populating function x86, pageattr: Add a PMD pagetable populating function x86, pageattr: Add a PTE pagetable populating function x86, pageattr: Add a PUD error unwinding path x86, pageattr: Add last levels of error path x86, cpa: Map in an arbitrary pgd EFI: Runtime services virtual mapping arch/x86/boot/compressed/eboot.c | 12 +- arch/x86/boot/compressed/eboot.h | 1 - arch/x86/include/asm/efi.h | 58 +++-- arch/x86/include/asm/pgtable_types.h | 3 +- arch/x86/mm/pageattr.c | 461 +++++++++++++++++++++++++++++++++-- arch/x86/platform/efi/efi.c | 126 +++++----- arch/x86/platform/efi/efi_64.c | 56 +---- arch/x86/platform/efi/efi_stub_64.S | 47 ++++ include/linux/efi.h | 6 +- 9 files changed, 615 insertions(+), 155 deletions(-) -- 1.8.4 -- 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
