[GIT PULL] x86 fixes

[Ingo Molnar]

Linus,

Please pull the latest x86-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
x86-urgent-for-linus

   # HEAD: 9d0513d82f1a8fe17b41f113ac5922fa57dbaf5c x86/platform/intel-mid: 
Revert "Make 'bt_sfi_data' const"

There two pending (non-PTI) x86 fixes:

 - an Intel-MID crash fix
 - and an Intel microcode loader blacklist quirk to avoid a problematic 
revision.

 Thanks,

        Ingo

------------------>
Andy Shevchenko (1):
      x86/platform/intel-mid: Revert "Make 'bt_sfi_data' const"

Jia Zhang (1):
      x86/microcode/intel: Extend BDW late-loading with a revision check


 arch/x86/kernel/cpu/microcode/intel.c                 | 13 +++++++++++--
 arch/x86/platform/intel-mid/device_libs/platform_bt.c |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c 
b/arch/x86/kernel/cpu/microcode/intel.c
index 8ccdca6d3f9e..d9e460fc7a3b 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -910,8 +910,17 @@ static bool is_blacklisted(unsigned int cpu)
 {
        struct cpuinfo_x86 *c = &cpu_data(cpu);
 
-       if (c->x86 == 6 && c->x86_model == INTEL_FAM6_BROADWELL_X) {
-               pr_err_once("late loading on model 79 is disabled.\n");
+       /*
+        * Late loading on model 79 with microcode revision less than 0x0b000021
+        * may result in a system hang. This behavior is documented in item
+        * BDF90, #334165 (Intel Xeon Processor E7-8800/4800 v4 Product Family).
+        */
+       if (c->x86 == 6 &&
+           c->x86_model == INTEL_FAM6_BROADWELL_X &&
+           c->x86_mask == 0x01 &&
+           c->microcode < 0x0b000021) {
+               pr_err_once("Erratum BDF90: late loading with revision < 
0x0b000021 (0x%x) disabled.\n", c->microcode);
+               pr_err_once("Please consider either early loading through 
initrd/built-in or a potential BIOS update.\n");
                return true;
        }
 
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_bt.c 
b/arch/x86/platform/intel-mid/device_libs/platform_bt.c
index dc036e511f48..5a0483e7bf66 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_bt.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_bt.c
@@ -60,7 +60,7 @@ static int __init tng_bt_sfi_setup(struct bt_sfi_data *ddata)
        return 0;
 }
 
-static const struct bt_sfi_data tng_bt_sfi_data __initdata = {
+static struct bt_sfi_data tng_bt_sfi_data __initdata = {
        .setup  = tng_bt_sfi_setup,
 };