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Merge tag 'for-linus-5.19a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

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Pull xen updates from Juergen Gross:

 - a small cleanup removing "export" of an __init function

 - a small series adding a new infrastructure for platform flags

 - a series adding generic virtio support for Xen guests (frontend side)

* tag 'for-linus-5.19a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: unexport __init-annotated xen_xlate_map_ballooned_pages()
  arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices
  xen/grant-dma-ops: Retrieve the ID of backend's domain for DT devices
  xen/grant-dma-iommu: Introduce stub IOMMU driver
  dt-bindings: Add xen,grant-dma IOMMU description for xen-grant DMA ops
  xen/virtio: Enable restricted memory access using Xen grant mappings
  xen/grant-dma-ops: Add option to restrict memory access under Xen
  xen/grants: support allocating consecutive grants
  arm/xen: Introduce xen_setup_dma_ops()
  virtio: replace arch_has_restricted_virtio_memory_access()
  kernel: add platform_has() infrastructure
This commit is contained in:
Linus Torvalds
2022-06-10 09:57:11 -07:00
parent 7d78b7ebdf dbac14a5a0
commit f2ecc964b9
32 changed files with 832 additions and 87 deletions
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2
kernel/Makefile
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@@ -7,7 +7,7 @@ obj-y = fork.o exec_domain.o panic.o \
cpu.o exit.o softirq.o resource.o \
sysctl.o capability.o ptrace.o user.o \
signal.o sys.o umh.o workqueue.o pid.o task_work.o \
extable.o params.o \
extable.o params.o platform-feature.o \
kthread.o sys_ni.o nsproxy.o \
notifier.o ksysfs.o cred.o reboot.o \
async.o range.o smpboot.o ucount.o regset.o

27
kernel/platform-feature.c Normal file
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@@ -0,0 +1,27 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bitops.h>
#include <linux/cache.h>
#include <linux/export.h>
#include <linux/platform-feature.h>
#define PLATFORM_FEAT_ARRAY_SZ BITS_TO_LONGS(PLATFORM_FEAT_N)
static unsigned long __read_mostly platform_features[PLATFORM_FEAT_ARRAY_SZ];
void platform_set(unsigned int feature)
{
set_bit(feature, platform_features);
}
EXPORT_SYMBOL_GPL(platform_set);
void platform_clear(unsigned int feature)
{
clear_bit(feature, platform_features);
}
EXPORT_SYMBOL_GPL(platform_clear);
bool platform_has(unsigned int feature)
{
return test_bit(feature, platform_features);
}
EXPORT_SYMBOL_GPL(platform_has);