Juergen Gross ae0e082687 xen: replace xen_remap() with memremap() ... commit 41925b105e upstream. xen_remap() is used to establish mappings for frames not under direct control of the kernel: for Xenstore and console ring pages, and for grant pages of non-PV guests. Today xen_remap() is defined to use ioremap() on x86 (doing uncached mappings), and ioremap_cache() on Arm (doing cached mappings). Uncached mappings for those use cases are bad for performance, so they should be avoided if possible. As all use cases of xen_remap() don't require uncached mappings (the mapped area is always physical RAM), a mapping using the standard WB cache mode is fine. As sparse is flagging some of the xen_remap() use cases to be not appropriate for iomem(), as the result is not annotated with the __iomem modifier, eliminate xen_remap() completely and replace all use cases with memremap() specifying the MEMREMAP_WB caching mode. xen_unmap() can be replaced with memunmap(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Link: https://lore.kernel.org/r/20220530082634.6339-1-jgross@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Teddy Astie <teddy.astie@vates.tech> [backport to 5.15.y] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-07-17 18:30:48 +02:00
..
events
xen-pciback
xenbus	xen: replace xen_remap() with memremap()	2025-07-17 18:30:48 +02:00
xenfs	xenfs/xensyms: respect hypervisor's "next" indication	2025-05-02 07:43:59 +02:00
acpi.c
arm-device.c
balloon.c
biomerge.c
cpu_hotplug.c
dbgp.c
efi.c
evtchn.c
features.c
gntalloc.c
gntdev-common.h
gntdev-dmabuf.c
gntdev-dmabuf.h
gntdev.c
grant-table.c	xen: replace xen_remap() with memremap()	2025-07-17 18:30:48 +02:00
Kconfig	xen: Change xen-acpi-processor dom0 dependency	2025-05-02 07:44:36 +02:00
Makefile
manage.c
mcelog.c
mem-reservation.c
pci.c
pcpu.c
platform-pci.c	xen: Add support for XenServer 6.1 platform device	2025-06-04 14:37:57 +02:00
privcmd-buf.c
privcmd.c
privcmd.h
pvcalls-back.c
pvcalls-front.c
pvcalls-front.h
swiotlb-xen.c	xen/swiotlb: relax alignment requirements	2025-06-04 14:38:07 +02:00
sys-hypervisor.c
time.c
unpopulated-alloc.c
xen-acpi-pad.c
xen-acpi-processor.c
xen-balloon.c
xen-front-pgdir-shbuf.c
xen-scsiback.c
xlate_mmu.c