Dmitry Safonov 739586951b arm64/vdso: Support mremap() for vDSO ... vDSO VMA address is saved in mm_context for the purpose of using restorer from vDSO page to return to userspace after signal handling. In Checkpoint Restore in Userspace (CRIU) project we place vDSO VMA on restore back to the place where it was on the dump. With the exception for x86 (where there is API to map vDSO with arch_prctl()), we move vDSO inherited from CRIU task to restoree position by mremap(). CRIU does support arm64 architecture, but kernel doesn't update context.vdso pointer after mremap(). Which results in translation fault after signal handling on restored application: https://github.com/xemul/criu/issues/288 Make vDSO code track the VMA address by supplying .mremap() fops the same way it's done for x86 and arm32 by: commit b059a453b1 ("x86/vdso: Add mremap hook to vm_special_mapping") commit 280e87e98c ("ARM: 8683/1: ARM32: Support mremap() for sigpage/vDSO"). Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Cc: Christopher Covington <cov@codeaurora.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2017-08-09 12:16:28 +01:00
..
boot	Allwinner fixes for 4.13	2017-08-04 13:04:42 +02:00
configs	arm64: defconfig: enable missing HWSPINLOCK	2017-07-27 23:09:54 -05:00
crypto	crypto: arm64/sha - avoid non-standard inline asm tricks	2017-05-18 13:19:52 +08:00
include	arm64: uaccess: Implement *_flushcache variants	2017-08-09 12:16:26 +01:00
kernel	arm64/vdso: Support mremap() for vDSO	2017-08-09 12:16:28 +01:00
kvm	KVM: arm/arm64: PMU: Fix overflow interrupt injection	2017-07-25 14:18:01 +01:00
lib	arm64: uaccess: Implement *_flushcache variants	2017-08-09 12:16:26 +01:00
mm	arm64: Implement pmem API support	2017-08-09 12:15:45 +01:00
net	arm64 updates for 4.13:	2017-07-05 17:09:27 -07:00
xen	xen/privcmd: Add IOCTL_PRIVCMD_DM_OP	2017-02-14 15:13:43 -05:00
Kconfig	arm64: uaccess: Implement *_flushcache variants	2017-08-09 12:16:26 +01:00
Kconfig.debug	arm64: relocation testing module	2017-04-04 17:03:32 +01:00
Kconfig.platforms	ARM: SoC 64-bit changes	2017-07-04 14:53:26 -07:00
Makefile	arm64: pass endianness info to sparse	2017-06-26 10:15:06 +01:00