Nathan Zimmer b8f2c21db3 efi, x86: Pass a proper identity mapping in efi_call_phys_prelog ... Update efi_call_phys_prelog to install an identity mapping of all available memory. This corrects a bug on very large systems with more then 512 GB in which bios would not be able to access addresses above not in the mapping. The result is a crash that looks much like this. BUG: unable to handle kernel paging request at 000000effd870020 IP: [<0000000078bce331>] 0x78bce330 PGD 0 Oops: 0000 [#1] SMP Modules linked in: CPU 0 Pid: 0, comm: swapper/0 Tainted: G W 3.8.0-rc1-next-20121224-medusa_ntz+ #2 Intel Corp. Stoutland Platform RIP: 0010:[<0000000078bce331>] [<0000000078bce331>] 0x78bce330 RSP: 0000:ffffffff81601d28 EFLAGS: 00010006 RAX: 0000000078b80e18 RBX: 0000000000000004 RCX: 0000000000000004 RDX: 0000000078bcf958 RSI: 0000000000002400 RDI: 8000000000000000 RBP: 0000000078bcf760 R08: 000000effd870000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000000c3 R12: 0000000000000030 R13: 000000effd870000 R14: 0000000000000000 R15: ffff88effd870000 FS: 0000000000000000(0000) GS:ffff88effe400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000effd870020 CR3: 000000000160c000 CR4: 00000000000006b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper/0 (pid: 0, threadinfo ffffffff81600000, task ffffffff81614400) Stack: 0000000078b80d18 0000000000000004 0000000078bced7b ffff880078b81fff 0000000000000000 0000000000000082 0000000078bce3a8 0000000000002400 0000000060000202 0000000078b80da0 0000000078bce45d ffffffff8107cb5a Call Trace: [<ffffffff8107cb5a>] ? on_each_cpu+0x77/0x83 [<ffffffff8102f4eb>] ? change_page_attr_set_clr+0x32f/0x3ed [<ffffffff81035946>] ? efi_call4+0x46/0x80 [<ffffffff816c5abb>] ? efi_enter_virtual_mode+0x1f5/0x305 [<ffffffff816aeb24>] ? start_kernel+0x34a/0x3d2 [<ffffffff816ae5ed>] ? repair_env_string+0x60/0x60 [<ffffffff816ae2be>] ? x86_64_start_reservations+0xba/0xc1 [<ffffffff816ae120>] ? early_idt_handlers+0x120/0x120 [<ffffffff816ae419>] ? x86_64_start_kernel+0x154/0x163 Code: Bad RIP value. RIP [<0000000078bce331>] 0x78bce330 RSP <ffffffff81601d28> CR2: 000000effd870020 ---[ end trace ead828934fef5eab ]--- Cc: stable@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>		2013-01-18 09:43:43 +00:00
..
boot	x86, efi: correct precedence of operators in setup_efi_pci	2012-12-20 11:47:14 -08:00
configs
crypto
ia32	new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those	2012-12-19 18:07:41 -05:00
include	X86: drivers: remove __dev* attributes.	2013-01-03 15:57:04 -08:00
kernel	Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-01-16 09:11:50 -08:00
kvm	KVM: x86: use dynamic percpu allocations for shared msrs area	2013-01-08 12:51:56 -02:00
lguest
lib	X86: drivers: remove __dev* attributes.	2013-01-03 15:57:04 -08:00
math-emu
mm
net
oprofile
pci	X86: drivers: remove __dev* attributes.	2013-01-03 15:57:04 -08:00
platform	efi, x86: Pass a proper identity mapping in efi_call_phys_prelog	2013-01-18 09:43:43 +00:00
power
realmode
syscalls	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2012-12-20 18:05:28 -08:00
tools
um	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2012-12-20 18:05:28 -08:00
vdso
video
xen	Bugfixes:	2012-12-18 12:26:54 -08:00
.gitignore
Kbuild
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2012-12-20 18:05:28 -08:00
Kconfig.cpu
Kconfig.debug
Makefile	md update for 3.8	2012-12-18 09:32:44 -08:00
Makefile_32.cpu
Makefile.um