android_kernel_oneplus_msm8998/arch
Jia Zhang 7d1bef0f60 x86/microcode/intel: Extend BDW late-loading with a revision check
commit b94b7373317164402ff7728d10f7023127a02b60 upstream.

Instead of blacklisting all model 79 CPUs when attempting a late
microcode loading, limit that only to CPUs with microcode revisions <
0x0b000021 because only on those late loading may cause a system hang.

For such processors either:

a) a BIOS update which might contain a newer microcode revision

or

b) the early microcode loading method

should be considered.

Processors with revisions 0x0b000021 or higher will not experience such
hangs.

For more details, see erratum BDF90 in document #334165 (Intel Xeon
Processor E7-8800/4800 v4 Product Family Specification Update) from
September 2017.

[ bp: Heavily massage commit message and pr_* statements. ]

Fixes: 723f2828a98c ("x86/microcode/intel: Disable late loading on model 79")
Signed-off-by: Jia Zhang <qianyue.zj@alibaba-inc.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1514772287-92959-1-git-send-email-qianyue.zj@alibaba-inc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17 09:35:30 +01:00
..
alpha alpha: fix build failures 2017-12-25 14:22:16 +01:00
arc ARC: uaccess: dont use "l" gcc inline asm constraint modifier 2018-01-10 09:27:11 +01:00
arm KVM: Fix stack-out-of-bounds read in write_mmio 2018-01-17 09:35:24 +01:00
arm64 arm64: Initialise high_memory global variable earlier 2017-12-25 14:22:08 +01:00
avr32 avr32: off by one in at32_init_pio() 2016-10-07 15:23:45 +02:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:05:00 +01:00
c6x c6x/ptrace: Remove useless PTRACE_SETREGSET implementation 2017-03-31 09:49:53 +02:00
cris cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected 2017-01-12 11:22:48 +01:00
frv mm: larger stack guard gap, between vmas 2017-06-26 07:13:11 +02:00
h8300 h8300/ptrace: Fix incorrect register transfer count 2017-03-31 09:49:53 +02:00
hexagon hexagon: fix strncpy_from_user() error return 2016-09-24 10:07:44 +02:00
ia64 ia64: copy_from_user() should zero the destination on access_ok() failure 2016-09-24 10:07:46 +02:00
m32r m32r: fix __get_user() 2016-09-24 10:07:43 +02:00
m68k m68k: Fix ndelay() macro 2016-12-15 08:49:23 -08:00
metag metag/uaccess: Check access_ok in strncpy_from_user 2017-05-25 14:30:16 +02:00
microblaze microblaze: fix copy_from_user() 2016-09-24 10:07:43 +02:00
mips MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset accesses 2018-01-17 09:35:25 +01:00
mn10300 mn10300: copy_from_user() should zero on access_ok() failure... 2016-09-24 10:07:45 +02:00
nios2 nios2: reserve boot memory for device tree 2017-04-12 12:38:34 +02:00
openrisc openrisc: fix issue handling 8 byte get_user calls 2017-12-20 10:04:54 +01:00
parisc parisc: Fix alignment of pa_tlb_lock in assembly on 32-bit SMP kernel 2018-01-10 09:27:12 +01:00
powerpc powerpc/perf: Dereference BHRB entries safely 2018-01-02 20:33:21 +01:00
s390 kernel: make groups_sort calling a responsibility group_info allocators 2018-01-10 09:27:10 +01:00
score score: fix copy_from_user() and friends 2016-09-24 10:07:44 +02:00
sh serial: sh-sci: Fix register offsets for the IRDA serial port 2017-11-15 17:13:10 +01:00
sparc sparc64/mm: set fields in deferred pages 2017-12-16 10:33:55 +01:00
tile mm: larger stack guard gap, between vmas 2017-06-26 07:13:11 +02:00
um um: Don't discard .text.exit section 2016-09-07 08:32:38 +02:00
unicore32 pwm: Changes for v4.4-rc1 2015-11-11 09:16:10 -08:00
x86 x86/microcode/intel: Extend BDW late-loading with a revision check 2018-01-17 09:35:30 +01:00
xtensa mm: larger stack guard gap, between vmas 2017-06-26 07:13:11 +02:00
.gitignore
Kconfig kexec: split kexec_load syscall from kexec core code 2015-09-10 13:29:01 -07:00