From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Fleming Subject: [GIT PULL] EFI urgent fix Date: Fri, 16 Oct 2015 11:01:45 +0100 Message-ID: <1444989706-11602-1-git-send-email-matt@codeblueprint.co.uk> Return-path: Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" Cc: Matt Fleming , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andy Lutomirski , Borislav Petkov , Laszlo Ersek , Paolo Bonzini , stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-efi@vger.kernel.org From: Matt Fleming Folks, the below fix from Paolo addresses an issue causing 32-bit non-PAE kernels to triple fault on EFI boot. The issue is that the physical address of the GDT that gets used in efi_call_phys_prolog() won't be covered by the identitty mapping in initial_page_table. The following changes since commit 8a53554e12e98d1759205afd7b8e9e2ea0936f48: x86/efi: Fix multiple GOP device support (2015-10-14 16:02:43 +0200) 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 f5f3497cad8c8416a74b9aaceb127908755d020a: x86/setup: Extend low identity map to cover whole kernel range (2015-10-16 10:52:29 +0100) ---------------------------------------------------------------- * Ensure that the identity mapping in initial_page_table is updated to cover the entire kernel range. This fixes a triple fault on non-PAE kernels when booting on 32-bit EFI due to accessing an unmapped GDT in efi_call_phys_prolog() - Paolo Bonzini ---------------------------------------------------------------- Paolo Bonzini (1): x86/setup: Extend low identity map to cover whole kernel range arch/x86/kernel/setup.c | 8 ++++++++ 1 file changed, 8 insertions(+)