Juergen Gross c51b3c639e xen: add new hypercall buffer mapping device ... For passing arbitrary data from user land to the Xen hypervisor the Xen tools today are using mlock()ed buffers. Unfortunately the kernel might change access rights of such buffers for brief periods of time e.g. for page migration or compaction, leading to access faults in the hypervisor, as the hypervisor can't use the locks of the kernel. In order to solve this problem add a new device node to the Xen privcmd driver to easily allocate hypercall buffers via mmap(). The memory is allocated in the kernel and just mapped into user space. Marked as VM_IO the user mapping will not be subject to page migration et al. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>		2018-06-22 08:26:42 +02:00
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events	xen/pirq: fix error path cleanup when binding MSIs	2018-02-28 20:20:01 +01:00
xen-pciback	xen: xen-pciback: Replace GFP_ATOMIC with GFP_KERNEL in pcistub_reg_add	2018-04-16 10:20:45 -04:00
xenbus	xen/store: do not store local values in xen_start_info	2018-05-17 08:39:13 +02:00
xenfs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
acpi.c	xen: rename dom0_op to platform_op	2015-12-21 14:40:55 +00:00
arm-device.c	Xen: ARM: Zero reserved fields of xatp before making hypervisor call	2017-01-03 10:06:13 -08:00
balloon.c	xen/balloon: Mark unallocated host memory as UNUSABLE	2017-12-20 13:16:20 -05:00
biomerge.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cpu_hotplug.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dbgp.c
efi.c	xen: Implement EFI reset_system callback	2017-05-02 12:06:50 +02:00
evtchn.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
fallback.c
features.c	xen: audit usages of module.h ; remove unnecessary instances	2016-03-21 15:13:32 +00:00
gntalloc.c	mm: treewide: remove GFP_TEMPORARY allocation flag	2017-09-13 18:53:16 -07:00
gntdev.c	xen/gntdev: Fix partial gntdev_mmap() cleanup	2018-01-10 08:38:44 -05:00
grant-table.c	xen/grant-table: Export gnttab_{alloc|free}_pages as GPL	2018-06-19 14:45:27 +02:00
Kconfig	xen: XEN_ACPI_PROCESSOR is Dom0-only	2017-12-12 09:39:43 -05:00
Makefile	xen: add new hypercall buffer mapping device	2018-06-22 08:26:42 +02:00
manage.c	xen: add error handling for xenbus_printf	2018-06-19 14:27:41 +02:00
mcelog.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
pci.c	xen/pci: Try harder to get PXM information for Xen	2015-04-15 10:57:28 +01:00
pcpu.c	xen: rename dom0_op to platform_op	2015-12-21 14:40:55 +00:00
platform-pci.c	xen-platform: constify pci_device_id.	2017-08-31 09:45:55 -04:00
preempt.c	xen/preempt: use need_resched() instead of should_resched()	2015-08-20 12:24:14 +01:00
privcmd-buf.c	xen: add new hypercall buffer mapping device	2018-06-22 08:26:42 +02:00
privcmd.c	xen: add new hypercall buffer mapping device	2018-06-22 08:26:42 +02:00
privcmd.h	xen: add new hypercall buffer mapping device	2018-06-22 08:26:42 +02:00
pvcalls-back.c	xen/pvcalls: fix null pointer dereference on map->sock	2018-02-26 17:13:12 +01:00
pvcalls-front.c	pvcalls-front: 64-bit align flags	2018-03-01 07:23:36 +01:00
pvcalls-front.h	xen: fix poll misannotation	2018-02-01 10:07:32 -05:00
swiotlb-xen.c	x86/dma: Remove dma_alloc_coherent_mask()	2018-03-20 10:01:56 +01:00
sys-hypervisor.c	xen: add sysfs node for hypervisor build id	2017-06-15 08:50:37 +02:00
time.c	xen: features and fixes for v4.15-rc1	2017-11-16 13:06:27 -08:00
tmem.c	mm, swap, frontswap: fix THP swap if frontswap enabled	2018-02-21 15:35:43 -08:00
xen-acpi-cpuhotplug.c	xen: rename dom0_op to platform_op	2015-12-21 14:40:55 +00:00
xen-acpi-memhotplug.c	ACPICA: Resources: Provide common part for struct acpi_resource_address structures.	2015-01-26 16:09:56 +01:00
xen-acpi-pad.c	xen: rename dom0_op to platform_op	2015-12-21 14:40:55 +00:00
xen-acpi-processor.c	xen/acpi: off by one in read_acpi_id()	2018-03-30 11:30:13 -04:00
xen-balloon.c	xen: fix booting ballooned down hvm guest	2017-10-26 08:11:44 -04:00
xen-scsiback.c	xen/scsiback: add error handling for xenbus_printf	2018-06-19 14:54:49 +02:00
xen-selfballoon.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xen-stub.c
xlate_mmu.c	Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn	2016-07-06 10:34:42 +01:00