Commit 66b6a0c9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'stable/for-linus-3.7-rc4-tag' of... 

Merge tag 'stable/for-linus-3.7-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull Xen bugfixes from Konrad Rzeszutek Wilk:
 - Use appropriate macros instead of hand-rolling our own (ARM).
 - Fixes if FB/KBD closed unexpectedly.
 - Fix memory leak in /dev/gntdev ioctl calls.
 - Fix overflow check in xenbus_file_write.
 - Document cleanup.
 - Performance optimization when migrating guests.

* tag 'stable/for-linus-3.7-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/mmu: Use Xen specific TLB flush instead of the generic one.
  xen/arm: use the __HVC macro
  xen/xenbus: fix overflow check in xenbus_file_write()
  xen-kbdfront: handle backend CLOSED without CLOSING
  xen-fbfront: handle backend CLOSED without CLOSING
  xen/gntdev: don't leak memory from IOCTL_GNTDEV_MAP_GRANT_REF
  x86: remove obsolete comment from asm/xen/hypervisor.h
parents d9b482c8 95a7d768

arch/arm/xen/hypercall.S

+5 −9
Original line number Diff line number Diff line
@@ -48,20 +48,16 @@ 


#include <linux/linkage.h>

#include <asm/assembler.h>

#include <asm/opcodes-virt.h>

#include <xen/interface/xen.h>





/* HVC 0xEA1 */

#ifdef CONFIG_THUMB2_KERNEL

#define xen_hvc .word 0xf7e08ea1

#else

#define xen_hvc .word 0xe140ea71

#endif

#define XEN_IMM 0xEA1



#define HYPERCALL_SIMPLE(hypercall)		\

ENTRY(HYPERVISOR_##hypercall)			\

	mov r12, #__HYPERVISOR_##hypercall;	\

	xen_hvc;							\

	__HVC(XEN_IMM);						\

	mov pc, lr;							\

ENDPROC(HYPERVISOR_##hypercall)
@@ -76,7 +72,7 @@ ENTRY(HYPERVISOR_##hypercall) \ 
	stmdb sp!, {r4}						\

	ldr r4, [sp, #4]					\

	mov r12, #__HYPERVISOR_##hypercall;	\

	xen_hvc								\

	__HVC(XEN_IMM);						\

	ldm sp!, {r4}						\

	mov pc, lr							\

ENDPROC(HYPERVISOR_##hypercall)
@@ -100,7 +96,7 @@ ENTRY(privcmd_call) 
	mov r2, r3

	ldr r3, [sp, #8]

	ldr r4, [sp, #4]

	xen_hvc

	__HVC(XEN_IMM)

	ldm sp!, {r4}

	mov pc, lr

ENDPROC(privcmd_call);

arch/x86/include/asm/xen/hypervisor.h

+0 −1
Original line number Diff line number Diff line
@@ -33,7 +33,6 @@ 
#ifndef _ASM_X86_XEN_HYPERVISOR_H

#define _ASM_X86_XEN_HYPERVISOR_H



/* arch/i386/kernel/setup.c */

extern struct shared_info *HYPERVISOR_shared_info;

extern struct start_info *xen_start_info;

arch/x86/xen/mmu.c

+20 −1
Original line number Diff line number Diff line
@@ -1288,6 +1288,25 @@ unsigned long xen_read_cr2_direct(void) 
	return this_cpu_read(xen_vcpu_info.arch.cr2);

}



void xen_flush_tlb_all(void)

{

	struct mmuext_op *op;

	struct multicall_space mcs;



	trace_xen_mmu_flush_tlb_all(0);



	preempt_disable();



	mcs = xen_mc_entry(sizeof(*op));



	op = mcs.args;

	op->cmd = MMUEXT_TLB_FLUSH_ALL;

	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);



	xen_mc_issue(PARAVIRT_LAZY_MMU);



	preempt_enable();

}

static void xen_flush_tlb(void)

{

	struct mmuext_op *op;
@@ -2518,7 +2537,7 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma, 
	err = 0;

out:



	flush_tlb_all();

	xen_flush_tlb_all();



	return err;

}

drivers/input/misc/xen-kbdfront.c

+4 −1
Original line number Diff line number Diff line
@@ -311,7 +311,6 @@ static void xenkbd_backend_changed(struct xenbus_device *dev, 
	case XenbusStateReconfiguring:

	case XenbusStateReconfigured:

	case XenbusStateUnknown:

	case XenbusStateClosed:

		break;



	case XenbusStateInitWait:
@@ -350,6 +349,10 @@ InitWait: 


		break;



	case XenbusStateClosed:

		if (dev->state == XenbusStateClosed)

			break;

		/* Missed the backend's CLOSING state -- fallthrough */

	case XenbusStateClosing:

		xenbus_frontend_closed(dev);

		break;

drivers/video/xen-fbfront.c

+4 −1
Original line number Diff line number Diff line
@@ -641,7 +641,6 @@ static void xenfb_backend_changed(struct xenbus_device *dev, 
	case XenbusStateReconfiguring:

	case XenbusStateReconfigured:

	case XenbusStateUnknown:

	case XenbusStateClosed:

		break;



	case XenbusStateInitWait:
@@ -670,6 +669,10 @@ InitWait: 
		info->feature_resize = val;

		break;



	case XenbusStateClosed:

		if (dev->state == XenbusStateClosed)

			break;

		/* Missed the backend's CLOSING state -- fallthrough */

	case XenbusStateClosing:

		xenbus_frontend_closed(dev);

		break;

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