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Commit 34e00acc authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - two microcode loader fixes

   - two FPU xstate handling fixes

   - an MCE timer handling related crash fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Make timer handling more robust
  x86/microcode: Do not access the initrd after it has been freed
  x86/fpu/xstate: Fix xcomp_bv in XSAVES header
  x86/fpu: Set the xcomp_bv when we fake up a XSAVES area
  x86/microcode/intel: Drop stashed AP patch pointer optimization
parents 891aa1e0 0becc0ae

arch/x86/include/asm/microcode.h

+1 −0
Original line number Diff line number Diff line
@@ -140,6 +140,7 @@ extern void __init load_ucode_bsp(void); 
extern void load_ucode_ap(void);

void reload_early_microcode(void);

extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);

extern bool initrd_gone;

#else

static inline int __init microcode_init(void)			{ return 0; };

static inline void __init load_ucode_bsp(void)			{ }

arch/x86/kernel/cpu/mcheck/mce.c

+12 −19
Original line number Diff line number Diff line
@@ -1373,20 +1373,15 @@ static unsigned long mce_adjust_timer_default(unsigned long interval) 


static unsigned long (*mce_adjust_timer)(unsigned long interval) = mce_adjust_timer_default;



static void __restart_timer(struct timer_list *t, unsigned long interval)

static void __start_timer(struct timer_list *t, unsigned long interval)

{

	unsigned long when = jiffies + interval;

	unsigned long flags;



	local_irq_save(flags);



	if (timer_pending(t)) {

		if (time_before(when, t->expires))

			mod_timer(t, when);

	} else {

		t->expires = round_jiffies(when);

		add_timer_on(t, smp_processor_id());

	}

	if (!timer_pending(t) || time_before(when, t->expires))

		mod_timer(t, round_jiffies(when));



	local_irq_restore(flags);

}
@@ -1421,7 +1416,7 @@ static void mce_timer_fn(unsigned long data) 


done:

	__this_cpu_write(mce_next_interval, iv);

	__restart_timer(t, iv);

	__start_timer(t, iv);

}



/*
@@ -1432,7 +1427,7 @@ void mce_timer_kick(unsigned long interval) 
	struct timer_list *t = this_cpu_ptr(&mce_timer);

	unsigned long iv = __this_cpu_read(mce_next_interval);



	__restart_timer(t, interval);

	__start_timer(t, interval);



	if (interval < iv)

		__this_cpu_write(mce_next_interval, interval);
@@ -1779,17 +1774,15 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c) 
	}

}



static void mce_start_timer(unsigned int cpu, struct timer_list *t)

static void mce_start_timer(struct timer_list *t)

{

	unsigned long iv = check_interval * HZ;



	if (mca_cfg.ignore_ce || !iv)

		return;



	per_cpu(mce_next_interval, cpu) = iv;



	t->expires = round_jiffies(jiffies + iv);

	add_timer_on(t, cpu);

	this_cpu_write(mce_next_interval, iv);

	__start_timer(t, iv);

}



static void __mcheck_cpu_setup_timer(void)
@@ -1806,7 +1799,7 @@ static void __mcheck_cpu_init_timer(void) 
	unsigned int cpu = smp_processor_id();



	setup_pinned_timer(t, mce_timer_fn, cpu);

	mce_start_timer(cpu, t);

	mce_start_timer(t);

}



/* Handle unconfigured int18 (should never happen) */
@@ -2566,7 +2559,7 @@ static int mce_cpu_dead(unsigned int cpu) 


static int mce_cpu_online(unsigned int cpu)

{

	struct timer_list *t = &per_cpu(mce_timer, cpu);

	struct timer_list *t = this_cpu_ptr(&mce_timer);

	int ret;



	mce_device_create(cpu);
@@ -2577,13 +2570,13 @@ static int mce_cpu_online(unsigned int cpu) 
		return ret;

	}

	mce_reenable_cpu();

	mce_start_timer(cpu, t);

	mce_start_timer(t);

	return 0;

}



static int mce_cpu_pre_down(unsigned int cpu)

{

	struct timer_list *t = &per_cpu(mce_timer, cpu);

	struct timer_list *t = this_cpu_ptr(&mce_timer);



	mce_disable_cpu();

	del_timer_sync(t);

arch/x86/kernel/cpu/microcode/amd.c

+3 −2
Original line number Diff line number Diff line
@@ -384,6 +384,7 @@ void load_ucode_amd_ap(unsigned int family) 
reget:

		if (!get_builtin_microcode(&cp, family)) {

#ifdef CONFIG_BLK_DEV_INITRD

			if (!initrd_gone)

				cp = find_cpio_data(ucode_path, (void *)initrd_start,

						    initrd_end - initrd_start, NULL);

#endif

arch/x86/kernel/cpu/microcode/core.c

+17 −5
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ 
static struct microcode_ops	*microcode_ops;

static bool dis_ucode_ldr = true;



bool initrd_gone;



LIST_HEAD(microcode_cache);



/*
@@ -190,21 +192,24 @@ void load_ucode_ap(void) 
static int __init save_microcode_in_initrd(void)

{

	struct cpuinfo_x86 *c = &boot_cpu_data;

	int ret = -EINVAL;



	switch (c->x86_vendor) {

	case X86_VENDOR_INTEL:

		if (c->x86 >= 6)

			return save_microcode_in_initrd_intel();

			ret = save_microcode_in_initrd_intel();

		break;

	case X86_VENDOR_AMD:

		if (c->x86 >= 0x10)

			return save_microcode_in_initrd_amd(c->x86);

			ret = save_microcode_in_initrd_amd(c->x86);

		break;

	default:

		break;

	}



	return -EINVAL;

	initrd_gone = true;



	return ret;

}



struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa)
@@ -247,9 +252,16 @@ struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa) 
	 * has the virtual address of the beginning of the initrd. It also

	 * possibly relocates the ramdisk. In either case, initrd_start contains

	 * the updated address so use that instead.

	 *

	 * initrd_gone is for the hotplug case where we've thrown out initrd

	 * already.

	 */

	if (!use_pa && initrd_start)

	if (!use_pa) {

		if (initrd_gone)

			return (struct cpio_data){ NULL, 0, "" };

		if (initrd_start)

			start = initrd_start;

	}



	return find_cpio_data(path, (void *)start, size, NULL);

#else /* !CONFIG_BLK_DEV_INITRD */

arch/x86/kernel/cpu/microcode/intel.c

+1 −8
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ 


static const char ucode_path[] = "kernel/x86/microcode/GenuineIntel.bin";



/* Current microcode patch used in early patching */

/* Current microcode patch used in early patching on the APs. */

struct microcode_intel *intel_ucode_patch;



static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
@@ -607,12 +607,6 @@ int __init save_microcode_in_initrd_intel(void) 
	struct ucode_cpu_info uci;

	struct cpio_data cp;



	/*

	 * AP loading didn't find any microcode patch, no need to save anything.

	 */

	if (!intel_ucode_patch || IS_ERR(intel_ucode_patch))

		return 0;



	if (!load_builtin_intel_microcode(&cp))

		cp = find_microcode_in_initrd(ucode_path, false);
@@ -628,7 +622,6 @@ int __init save_microcode_in_initrd_intel(void) 
	return 0;

}





/*

 * @res_patch, output: a pointer to the patch we found.

 */