* Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote:
>
> > On 18 feb. 2015, at 13:43, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> >
> >
> > * Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> >> Folks, please pull the following fixes. The revert addresses a
> >> regression that Ard hit when booting Qemu and Xen, and the other patch
> >> ensures that we don't triple fault when receiving an NMI or MCE during
> >> an EFI mixed mode call, which may happen, for instance, when running
> >> perf.
> >>
> >> The pull is against tip/x86/efi because tip/x86/urgent doesn't contain
> >> commit d1a8d66b9177 ("efi/libstub: Call get_memory_map() to obtain map
> >> and desc sizes") needed for the revert.
> >>
> >> If you'd prefer for me to resend this after the merge window closes,
> >> just let me know.
> >>
> >> The following changes since commit 3c01b74e818a7a3b2ee9b0d584cca0bc154a031c:
> >>
> >> Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/efi (2015-01-29 19:16:40 +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 43a9f69692b232d1c64c913a27507eb14a1c47fd:
> >>
> >> Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes" (2015-02-18 11:38:13 +0000)
> >>
> >> ----------------------------------------------------------------
> >> * Leave a valid 64-bit IDT installed during runtime EFI mixed mode
> >> calls to avoid triple faults if an NMI/MCE is received.
> >>
> >> * Revert Ard's change to the libstub get_memory_map() that went into
> >> the v3.20 merge window because it causes boot regressions on Qemu and
> >> Xen.
> >>
> >> ----------------------------------------------------------------
> >> Matt Fleming (2):
> >> x86/efi: Avoid triple faults during EFI mixed mode calls
> >> Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes"
> >>
> >> arch/x86/boot/compressed/Makefile | 1 +
> >> arch/x86/boot/compressed/efi_stub_64.S | 25 ----
> >> arch/x86/boot/compressed/efi_thunk_64.S | 196 +++++++++++++++++++++++++
> >> arch/x86/platform/efi/efi_stub_64.S | 161 --------------------
> >> arch/x86/platform/efi/efi_thunk_64.S | 121 ++++++++++++---
> >> drivers/firmware/efi/libstub/efi-stub-helper.c | 16 +-
> >> 6 files changed, 307 insertions(+), 213 deletions(-)
> >> create mode 100644 arch/x86/boot/compressed/efi_thunk_64.S
> >
> > Pulled, thanks Matt!
> >
> > Btw., I find the revert a bit sad: in most cases breaking
> > virtualized environments isn't a regression really, it's
> > _them_ who couple to the kernel in an incestuous way that
> > causes the problem: fixes should come from them ...
> >
>
> It potentially breaks physical environments as well,
> [...]
Fair enough!
Thanks,
Ingo
--
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
