Merge tag 'for-linus-6.0-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - a series fine tuning virtio support for Xen guests, including removal
   the now again unused "platform_has()" feature.

 - a fix for host admin triggered reboot of Xen guests

 - a simple spelling fix

* tag 'for-linus-6.0-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: don't require virtio with grants for non-PV guests
  kernel: remove platform_has() infrastructure
  virtio: replace restricted mem access flag with callback
  xen: Fix spelling mistake
  xen/manage: Use orderly_reboot() to reboot

6 files changed, 28 insertions, 36 deletions

diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index 36db8b9eb68a..941be574bbe0 100644
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -45,7 +45,6 @@ mandatory-y += msi.h
 mandatory-y += pci.h
 mandatory-y += percpu.h
 mandatory-y += pgalloc.h
-mandatory-y += platform-feature.h
 mandatory-y += preempt.h
 mandatory-y += rwonce.h
 mandatory-y += sections.h
diff --git a/include/asm-generic/platform-feature.h b/include/asm-generic/platform-feature.h
deleted file mode 100644
index 4b0af3d51588..000000000000
--- a/include/asm-generic/platform-feature.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_GENERIC_PLATFORM_FEATURE_H
-#define _ASM_GENERIC_PLATFORM_FEATURE_H
-
-/* Number of arch specific feature flags. */
-#define PLATFORM_ARCH_FEAT_N	0
-
-#endif /* _ASM_GENERIC_PLATFORM_FEATURE_H */
diff --git a/include/linux/platform-feature.h b/include/linux/platform-feature.h
deleted file mode 100644
index b2f48be999fa..000000000000
--- a/include/linux/platform-feature.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _PLATFORM_FEATURE_H
-#define _PLATFORM_FEATURE_H
-
-#include <linux/bitops.h>
-#include <asm/platform-feature.h>
-
-/* The platform features are starting with the architecture specific ones. */
-
-/* Used to enable platform specific DMA handling for virtio devices. */
-#define PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS	(0 + PLATFORM_ARCH_FEAT_N)
-
-#define PLATFORM_FEAT_N				(1 + PLATFORM_ARCH_FEAT_N)
-
-void platform_set(unsigned int feature);
-void platform_clear(unsigned int feature);
-bool platform_has(unsigned int feature);
-
-#endif /* _PLATFORM_FEATURE_H */
diff --git a/include/linux/virtio_anchor.h b/include/linux/virtio_anchor.h
new file mode 100644
index 000000000000..432e6c00b3ca
--- /dev/null
+++ b/include/linux/virtio_anchor.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_VIRTIO_ANCHOR_H
+#define _LINUX_VIRTIO_ANCHOR_H
+
+#ifdef CONFIG_VIRTIO_ANCHOR
+struct virtio_device;
+
+bool virtio_require_restricted_mem_acc(struct virtio_device *dev);
+extern bool (*virtio_check_mem_acc_cb)(struct virtio_device *dev);
+
+static inline void virtio_set_mem_acc_cb(bool (*func)(struct virtio_device *))
+{
+	virtio_check_mem_acc_cb = func;
+}
+#else
+#define virtio_set_mem_acc_cb(func) do { } while (0)
+#endif
+
+#endif /* _LINUX_VIRTIO_ANCHOR_H */
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index 80546960f8b7..dae0f350c678 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -5,6 +5,7 @@
 #include <linux/percpu.h>
 #include <linux/notifier.h>
 #include <linux/efi.h>
+#include <linux/virtio_anchor.h>
 #include <xen/features.h>
 #include <asm/xen/interface.h>
 #include <xen/interface/vcpu.h>
@@ -217,6 +218,7 @@ static inline void xen_preemptible_hcall_end(void) { }
 #ifdef CONFIG_XEN_GRANT_DMA_OPS
 void xen_grant_setup_dma_ops(struct device *dev);
 bool xen_is_grant_dma_device(struct device *dev);
+bool xen_virtio_mem_acc(struct virtio_device *dev);
 #else
 static inline void xen_grant_setup_dma_ops(struct device *dev)
 {
@@ -225,6 +227,13 @@ static inline bool xen_is_grant_dma_device(struct device *dev)
 {
 	return false;
 }
+
+struct virtio_device;
+
+static inline bool xen_virtio_mem_acc(struct virtio_device *dev)
+{
+	return false;
+}
 #endif /* CONFIG_XEN_GRANT_DMA_OPS */
 
 #endif /* INCLUDE_XEN_OPS_H */
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 0780a81e140d..a99bab817523 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -52,14 +52,6 @@ bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
 extern u64 xen_saved_max_mem_size;
 #endif
 
-#include <linux/platform-feature.h>
-
-static inline void xen_set_restricted_virtio_memory_access(void)
-{
-	if (IS_ENABLED(CONFIG_XEN_VIRTIO) && xen_domain())
-		platform_set(PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS);
-}
-
 #ifdef CONFIG_XEN_UNPOPULATED_ALLOC
 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
 void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);