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Commit 4b696dcb 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 Thomas Gleixner:
 "This update contains:

   - Hopefully the last ASM CLAC fixups

   - A fix for the Quark family related to the IMR lock which makes
     kexec work again

   - A off-by-one fix in the MPX code.  Ironic, isn't it?

   - A fix for X86_PAE which addresses once more an unsigned long vs
     phys_addr_t hickup"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mpx: Fix off-by-one comparison with nr_registers
  x86/mm: Fix slow_virt_to_phys() for X86_PAE again
  x86/entry/compat: Add missing CLAC to entry_INT80_32
  x86/entry/32: Add an ASM_CLAC to entry_SYSENTER_32
  x86/platform/intel/quark: Change the kernel's IMR lock bit to false
parents 76c03f0f 9bf148cb

arch/x86/entry/entry_32.S

+1 −0
Original line number Diff line number Diff line
@@ -294,6 +294,7 @@ sysenter_past_esp: 
	pushl	$__USER_DS		/* pt_regs->ss */

	pushl	%ebp			/* pt_regs->sp (stashed in bp) */

	pushfl				/* pt_regs->flags (except IF = 0) */

	ASM_CLAC			/* Clear AC after saving FLAGS */

	orl	$X86_EFLAGS_IF, (%esp)	/* Fix IF */

	pushl	$__USER_CS		/* pt_regs->cs */

	pushl	$0			/* pt_regs->ip = 0 (placeholder) */

arch/x86/entry/entry_64_compat.S

+1 −0
Original line number Diff line number Diff line
@@ -261,6 +261,7 @@ ENTRY(entry_INT80_compat) 
	 * Interrupts are off on entry.

	 */

	PARAVIRT_ADJUST_EXCEPTION_FRAME

	ASM_CLAC			/* Do this early to minimize exposure */

	SWAPGS



	/*

arch/x86/mm/mpx.c

+1 −1
Original line number Diff line number Diff line
@@ -123,7 +123,7 @@ static int get_reg_offset(struct insn *insn, struct pt_regs *regs, 
		break;

	}



	if (regno > nr_registers) {

	if (regno >= nr_registers) {

		WARN_ONCE(1, "decoded an instruction with an invalid register");

		return -EINVAL;

	}

arch/x86/mm/pageattr.c

+10 −4
Original line number Diff line number Diff line
@@ -419,24 +419,30 @@ pmd_t *lookup_pmd_address(unsigned long address) 
phys_addr_t slow_virt_to_phys(void *__virt_addr)

{

	unsigned long virt_addr = (unsigned long)__virt_addr;

	unsigned long phys_addr, offset;

	phys_addr_t phys_addr;

	unsigned long offset;

	enum pg_level level;

	pte_t *pte;



	pte = lookup_address(virt_addr, &level);

	BUG_ON(!pte);



	/*

	 * pXX_pfn() returns unsigned long, which must be cast to phys_addr_t

	 * before being left-shifted PAGE_SHIFT bits -- this trick is to

	 * make 32-PAE kernel work correctly.

	 */

	switch (level) {

	case PG_LEVEL_1G:

		phys_addr = pud_pfn(*(pud_t *)pte) << PAGE_SHIFT;

		phys_addr = (phys_addr_t)pud_pfn(*(pud_t *)pte) << PAGE_SHIFT;

		offset = virt_addr & ~PUD_PAGE_MASK;

		break;

	case PG_LEVEL_2M:

		phys_addr = pmd_pfn(*(pmd_t *)pte) << PAGE_SHIFT;

		phys_addr = (phys_addr_t)pmd_pfn(*(pmd_t *)pte) << PAGE_SHIFT;

		offset = virt_addr & ~PMD_PAGE_MASK;

		break;

	default:

		phys_addr = pte_pfn(*pte) << PAGE_SHIFT;

		phys_addr = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT;

		offset = virt_addr & ~PAGE_MASK;

	}

arch/x86/platform/intel-quark/imr.c

+2 −2
Original line number Diff line number Diff line
@@ -592,14 +592,14 @@ static void __init imr_fixup_memmap(struct imr_device *idev) 
	end = (unsigned long)__end_rodata - 1;



	/*

	 * Setup a locked IMR around the physical extent of the kernel

	 * Setup an unlocked IMR around the physical extent of the kernel

	 * from the beginning of the .text secton to the end of the

	 * .rodata section as one physically contiguous block.

	 *

	 * We don't round up @size since it is already PAGE_SIZE aligned.

	 * See vmlinux.lds.S for details.

	 */

	ret = imr_add_range(base, size, IMR_CPU, IMR_CPU, true);

	ret = imr_add_range(base, size, IMR_CPU, IMR_CPU, false);

	if (ret < 0) {

		pr_err("unable to setup IMR for kernel: %zu KiB (%lx - %lx)\n",

			size / 1024, start, end);