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Commit 99aedde0 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: EFI fixes, an Intel Quark fix, an asm fix and an FPU
  handling fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu/xsaves: Fix improper uses of __ex_table
  x86/intel/quark: Select COMMON_CLK
  x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization
  firmware: dmi_scan: Fix dmi_len type
  efi/libstub: Fix boundary checking in efi_high_alloc()
  firmware: dmi_scan: Fix dmi scan to handle "End of Table" structure
parents 8a001af4 06c8173e

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -499,6 +499,7 @@ config X86_INTEL_QUARK 
	depends on X86_IO_APIC

	select IOSF_MBI

	select INTEL_IMR

	select COMMON_CLK

	---help---

	  Select to include support for Quark X1000 SoC.

	  Say Y here if you have a Quark based system such as the Arduino

arch/x86/include/asm/xsave.h

+11 −17
Original line number Diff line number Diff line
@@ -82,18 +82,15 @@ static inline int xsave_state_booting(struct xsave_struct *fx, u64 mask) 
	if (boot_cpu_has(X86_FEATURE_XSAVES))

		asm volatile("1:"XSAVES"\n\t"

			"2:\n\t"

			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			     xstate_fault

			: "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");

	else

		asm volatile("1:"XSAVE"\n\t"

			"2:\n\t"

			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");



	asm volatile(xstate_fault

		     : "0" (0)

			     xstate_fault

			: "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");



	return err;

}
@@ -112,18 +109,15 @@ static inline int xrstor_state_booting(struct xsave_struct *fx, u64 mask) 
	if (boot_cpu_has(X86_FEATURE_XSAVES))

		asm volatile("1:"XRSTORS"\n\t"

			"2:\n\t"

			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			     xstate_fault

			: "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");

	else

		asm volatile("1:"XRSTOR"\n\t"

			"2:\n\t"

			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");



	asm volatile(xstate_fault

		     : "0" (0)

			     xstate_fault

			: "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

			:   "memory");



	return err;

}
@@ -149,9 +143,9 @@ static inline int xsave_state(struct xsave_struct *fx, u64 mask) 
	 */

	alternative_input_2(

		"1:"XSAVE,

		"1:"XSAVEOPT,

		XSAVEOPT,

		X86_FEATURE_XSAVEOPT,

		"1:"XSAVES,

		XSAVES,

		X86_FEATURE_XSAVES,

		[fx] "D" (fx), "a" (lmask), "d" (hmask) :

		"memory");
@@ -178,7 +172,7 @@ static inline int xrstor_state(struct xsave_struct *fx, u64 mask) 
	 */

	alternative_input(

		"1: " XRSTOR,

		"1: " XRSTORS,

		XRSTORS,

		X86_FEATURE_XSAVES,

		"D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)

		: "memory");

arch/x86/kernel/entry_64.S

+8 −5
Original line number Diff line number Diff line
@@ -269,11 +269,14 @@ ENTRY(ret_from_fork) 
	testl $3, CS-ARGOFFSET(%rsp)		# from kernel_thread?

	jz   1f



	testl $_TIF_IA32, TI_flags(%rcx)	# 32-bit compat task needs IRET

	jnz  int_ret_from_sys_call



	RESTORE_TOP_OF_STACK %rdi, -ARGOFFSET

	jmp ret_from_sys_call			# go to the SYSRET fastpath

	/*

	 * By the time we get here, we have no idea whether our pt_regs,

	 * ti flags, and ti status came from the 64-bit SYSCALL fast path,

	 * the slow path, or one of the ia32entry paths.

	 * Use int_ret_from_sys_call to return, since it can safely handle

	 * all of the above.

	 */

	jmp  int_ret_from_sys_call



1:

	subq $REST_SKIP, %rsp	# leave space for volatiles

drivers/firmware/dmi_scan.c

+9 −8
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ static const char * __init dmi_string(const struct dmi_header *dm, u8 s) 
 *	We have to be cautious here. We have seen BIOSes with DMI pointers

 *	pointing to completely the wrong place for example

 */

static void dmi_table(u8 *buf, int len, int num,

static void dmi_table(u8 *buf, u32 len, int num,

		      void (*decode)(const struct dmi_header *, void *),

		      void *private_data)

{
@@ -92,12 +92,6 @@ static void dmi_table(u8 *buf, int len, int num, 
	while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {

		const struct dmi_header *dm = (const struct dmi_header *)data;



		/*

		 * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0]

		 */

		if (dm->type == DMI_ENTRY_END_OF_TABLE)

			break;



		/*

		 *  We want to know the total length (formatted area and

		 *  strings) before decoding to make sure we won't run off the
@@ -108,13 +102,20 @@ static void dmi_table(u8 *buf, int len, int num, 
			data++;

		if (data - buf < len - 1)

			decode(dm, private_data);



		/*

		 * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0]

		 */

		if (dm->type == DMI_ENTRY_END_OF_TABLE)

			break;



		data += 2;

		i++;

	}

}



static phys_addr_t dmi_base;

static u16 dmi_len;

static u32 dmi_len;

static u16 dmi_num;



static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,

drivers/firmware/efi/libstub/efi-stub-helper.c

+4 −4
Original line number Diff line number Diff line
@@ -179,12 +179,12 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg, 
		start = desc->phys_addr;

		end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);



		if ((start + size) > end || (start + size) > max)

			continue;



		if (end - size > max)

		if (end > max)

			end = max;



		if ((start + size) > end)

			continue;



		if (round_down(end - size, align) < start)

			continue;