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xen: branch for v5.19-rc1b 

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Merge tag 'for-linus-5.19-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull more xen updates from Juergen Gross:
 "Two cleanup patches for Xen related code and (more important) an
  update of MAINTAINERS for Xen, as Boris Ostrovsky decided to step
  down"

* tag 'for-linus-5.19-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: replace xen_remap() with memremap()
  MAINTAINERS: Update Xen maintainership
  xen: switch gnttab_end_foreign_access() to take a struct page pointer
This commit is contained in:
Linus Torvalds 2022-06-04 13:42:53 -07:00
parent 45b2e5ad68 41925b105e
commit 4ccbe91de9
16 changed files with 48 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
MAINTAINERS
View File

@ -21744,23 +21744,29 @@ F: arch/arm64/include/asm/xen/
F: arch/arm64/xen/
XEN HYPERVISOR INTERFACE
M: Boris Ostrovsky <boris.ostrovsky@oracle.com>
M: Juergen Gross <jgross@suse.com>
R: Stefano Stabellini <sstabellini@kernel.org>
M: Stefano Stabellini <sstabellini@kernel.org>
R: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
F: Documentation/ABI/stable/sysfs-hypervisor-xen
F: Documentation/ABI/testing/sysfs-hypervisor-xen
F: arch/x86/include/asm/pvclock-abi.h
F: arch/x86/include/asm/xen/
F: arch/x86/platform/pvh/
F: arch/x86/xen/
F: drivers/*/xen-*front.c
F: drivers/xen/
F: include/uapi/xen/
F: include/xen/
XEN HYPERVISOR X86
M: Juergen Gross <jgross@suse.com>
R: Boris Ostrovsky <boris.ostrovsky@oracle.com>
L: xen-devel@lists.xenproject.org (moderated for non-subscribers)
S: Supported
F: arch/x86/include/asm/pvclock-abi.h
F: arch/x86/include/asm/xen/
F: arch/x86/platform/pvh/
F: arch/x86/xen/
XEN NETWORK BACKEND DRIVER
M: Wei Liu <wei.liu@kernel.org>
M: Paul Durrant <paul@xen.org>

3
arch/x86/include/asm/xen/page.h
View File

@ -347,9 +347,6 @@ unsigned long arbitrary_virt_to_mfn(void *vaddr);
void make_lowmem_page_readonly(void *vaddr);
void make_lowmem_page_readwrite(void *vaddr);
#define xen_remap(cookie, size) ioremap((cookie), (size))
#define xen_unmap(cookie) iounmap((cookie))
static inline bool xen_arch_need_swiotlb(struct device *dev,
phys_addr_t phys,
dma_addr_t dev_addr)

6
drivers/block/xen-blkfront.c
View File

@ -1221,7 +1221,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo)
list_del(&persistent_gnt->node);
if (persistent_gnt->gref != INVALID_GRANT_REF) {
gnttab_end_foreign_access(persistent_gnt->gref,
0UL);
NULL);
rinfo->persistent_gnts_c--;
}
if (info->feature_persistent)
@ -1244,7 +1244,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo)
rinfo->shadow[i].req.u.rw.nr_segments;
for (j = 0; j < segs; j++) {
persistent_gnt = rinfo->shadow[i].grants_used[j];
gnttab_end_foreign_access(persistent_gnt->gref, 0UL);
gnttab_end_foreign_access(persistent_gnt->gref, NULL);
if (info->feature_persistent)
__free_page(persistent_gnt->page);
kfree(persistent_gnt);
@ -1259,7 +1259,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo)
for (j = 0; j < INDIRECT_GREFS(segs); j++) {
persistent_gnt = rinfo->shadow[i].indirect_grants[j];
gnttab_end_foreign_access(persistent_gnt->gref, 0UL);
gnttab_end_foreign_access(persistent_gnt->gref, NULL);
__free_page(persistent_gnt->page);
kfree(persistent_gnt);
}

4
drivers/input/misc/xen-kbdfront.c
View File

@ -481,7 +481,7 @@ static int xenkbd_connect_backend(struct xenbus_device *dev,
error_evtchan:
xenbus_free_evtchn(dev, evtchn);
error_grant:
gnttab_end_foreign_access(info->gref, 0UL);
gnttab_end_foreign_access(info->gref, NULL);
info->gref = -1;
return ret;
}
@ -492,7 +492,7 @@ static void xenkbd_disconnect_backend(struct xenkbd_info *info)
unbind_from_irqhandler(info->irq, info);
info->irq = -1;
if (info->gref >= 0)
gnttab_end_foreign_access(info->gref, 0UL);
gnttab_end_foreign_access(info->gref, NULL);
info->gref = -1;
}

7
drivers/net/xen-netfront.c
View File

@ -1386,7 +1386,7 @@ static void xennet_release_tx_bufs(struct netfront_queue *queue)
queue->tx_skbs[i] = NULL;
get_page(queue->grant_tx_page[i]);
gnttab_end_foreign_access(queue->grant_tx_ref[i],
(unsigned long)page_address(queue->grant_tx_page[i]));
queue->grant_tx_page[i]);
queue->grant_tx_page[i] = NULL;
queue->grant_tx_ref[i] = INVALID_GRANT_REF;
add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, i);
@ -1418,8 +1418,7 @@ static void xennet_release_rx_bufs(struct netfront_queue *queue)
* foreign access is ended (which may be deferred).
*/
get_page(page);
gnttab_end_foreign_access(ref,
(unsigned long)page_address(page));
gnttab_end_foreign_access(ref, page);
queue->grant_rx_ref[id] = INVALID_GRANT_REF;
kfree_skb(skb);
@ -1760,7 +1759,7 @@ static void xennet_end_access(int ref, void *page)
{
/* This frees the page as a side-effect */
if (ref != INVALID_GRANT_REF)
gnttab_end_foreign_access(ref, (unsigned long)page);
gnttab_end_foreign_access(ref, virt_to_page(page));
}
static void xennet_disconnect_backend(struct netfront_info *info)

2
drivers/tty/hvc/hvc_xen.c
View File

@ -253,7 +253,7 @@ static int xen_hvm_console_init(void)
if (r < 0 || v == 0)
goto err;
gfn = v;
info->intf = xen_remap(gfn << XEN_PAGE_SHIFT, XEN_PAGE_SIZE);
info->intf = memremap(gfn << XEN_PAGE_SHIFT, XEN_PAGE_SIZE, MEMREMAP_WB);
if (info->intf == NULL)
goto err;
info->vtermno = HVC_COOKIE;

9
drivers/xen/gntalloc.c
View File

@ -175,8 +175,6 @@ undo:
static void __del_gref(struct gntalloc_gref *gref)
{
unsigned long addr;
if (gref->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) {
uint8_t *tmp = kmap_local_page(gref->page);
tmp[gref->notify.pgoff] = 0;
@ -190,10 +188,9 @@ static void __del_gref(struct gntalloc_gref *gref)
gref->notify.flags = 0;
if (gref->gref_id) {
if (gref->page) {
addr = (unsigned long)page_to_virt(gref->page);
gnttab_end_foreign_access(gref->gref_id, addr);
} else
if (gref->page)
gnttab_end_foreign_access(gref->gref_id, gref->page);
else
gnttab_free_grant_reference(gref->gref_id);
}

2
drivers/xen/gntdev-dmabuf.c
View File

@ -524,7 +524,7 @@ static void dmabuf_imp_end_foreign_access(u32 *refs, int count)
for (i = 0; i < count; i++)
if (refs[i] != INVALID_GRANT_REF)
gnttab_end_foreign_access(refs[i], 0UL);
gnttab_end_foreign_access(refs[i], NULL);
}
static void dmabuf_imp_free_storage(struct gntdev_dmabuf *gntdev_dmabuf)

14
drivers/xen/grant-table.c
View File

@ -430,13 +430,13 @@ int gnttab_try_end_foreign_access(grant_ref_t ref)
}
EXPORT_SYMBOL_GPL(gnttab_try_end_foreign_access);
void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page)
void gnttab_end_foreign_access(grant_ref_t ref, struct page *page)
{
if (gnttab_try_end_foreign_access(ref)) {
if (page != 0)
put_page(virt_to_page(page));
if (page)
put_page(page);
} else
gnttab_add_deferred(ref, page ? virt_to_page(page) : NULL);
gnttab_add_deferred(ref, page);
}
EXPORT_SYMBOL_GPL(gnttab_end_foreign_access);
@ -632,7 +632,7 @@ int gnttab_setup_auto_xlat_frames(phys_addr_t addr)
if (xen_auto_xlat_grant_frames.count)
return -EINVAL;
vaddr = xen_remap(addr, XEN_PAGE_SIZE * max_nr_gframes);
vaddr = memremap(addr, XEN_PAGE_SIZE * max_nr_gframes, MEMREMAP_WB);
if (vaddr == NULL) {
pr_warn("Failed to ioremap gnttab share frames (addr=%pa)!\n",
&addr);
@ -640,7 +640,7 @@ int gnttab_setup_auto_xlat_frames(phys_addr_t addr)
}
pfn = kcalloc(max_nr_gframes, sizeof(pfn[0]), GFP_KERNEL);
if (!pfn) {
xen_unmap(vaddr);
memunmap(vaddr);
return -ENOMEM;
}
for (i = 0; i < max_nr_gframes; i++)
@ -659,7 +659,7 @@ void gnttab_free_auto_xlat_frames(void)
if (!xen_auto_xlat_grant_frames.count)
return;
kfree(xen_auto_xlat_grant_frames.pfn);
xen_unmap(xen_auto_xlat_grant_frames.vaddr);
memunmap(xen_auto_xlat_grant_frames.vaddr);
xen_auto_xlat_grant_frames.pfn = NULL;
xen_auto_xlat_grant_frames.count = 0;

6
drivers/xen/pvcalls-front.c
View File

@ -238,8 +238,8 @@ static void pvcalls_front_free_map(struct pvcalls_bedata *bedata,
spin_unlock(&bedata->socket_lock);
for (i = 0; i < (1 << PVCALLS_RING_ORDER); i++)
gnttab_end_foreign_access(map->active.ring->ref[i], 0);
gnttab_end_foreign_access(map->active.ref, 0);
gnttab_end_foreign_access(map->active.ring->ref[i], NULL);
gnttab_end_foreign_access(map->active.ref, NULL);
free_page((unsigned long)map->active.ring);
kfree(map);
@ -1117,7 +1117,7 @@ static int pvcalls_front_remove(struct xenbus_device *dev)
}
}
if (bedata->ref != -1)
gnttab_end_foreign_access(bedata->ref, 0);
gnttab_end_foreign_access(bedata->ref, NULL);
kfree(bedata->ring.sring);
kfree(bedata);
xenbus_switch_state(dev, XenbusStateClosed);

2
drivers/xen/xen-front-pgdir-shbuf.c
View File

@ -135,7 +135,7 @@ void xen_front_pgdir_shbuf_free(struct xen_front_pgdir_shbuf *buf)
for (i = 0; i < buf->num_grefs; i++)
if (buf->grefs[i] != INVALID_GRANT_REF)
gnttab_end_foreign_access(buf->grefs[i], 0UL);
gnttab_end_foreign_access(buf->grefs[i], NULL);
}
kfree(buf->grefs);
kfree(buf->directory);

2
drivers/xen/xenbus/xenbus_client.c
View File

@ -439,7 +439,7 @@ void xenbus_teardown_ring(void **vaddr, unsigned int nr_pages,
for (i = 0; i < nr_pages; i++) {
if (grefs[i] != INVALID_GRANT_REF) {
gnttab_end_foreign_access(grefs[i], 0);
gnttab_end_foreign_access(grefs[i], NULL);
grefs[i] = INVALID_GRANT_REF;
}
}

8
drivers/xen/xenbus/xenbus_probe.c
View File

@ -752,8 +752,8 @@ static void xenbus_probe(void)
xenstored_ready = 1;
if (!xen_store_interface) {
xen_store_interface = xen_remap(xen_store_gfn << XEN_PAGE_SHIFT,
XEN_PAGE_SIZE);
xen_store_interface = memremap(xen_store_gfn << XEN_PAGE_SHIFT,
XEN_PAGE_SIZE, MEMREMAP_WB);
/*
* Now it is safe to free the IRQ used for xenstore late
* initialization. No need to unbind: it is about to be
@ -1009,8 +1009,8 @@ static int __init xenbus_init(void)
#endif
xen_store_gfn = (unsigned long)v;
xen_store_interface =
xen_remap(xen_store_gfn << XEN_PAGE_SHIFT,
XEN_PAGE_SIZE);
memremap(xen_store_gfn << XEN_PAGE_SHIFT,
XEN_PAGE_SIZE, MEMREMAP_WB);
if (xen_store_interface->connection != XENSTORE_CONNECTED)
wait = true;
}

3
include/xen/arm/page.h
View File

@ -109,9 +109,6 @@ static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
return __set_phys_to_machine(pfn, mfn);
}
#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
#define xen_unmap(cookie) iounmap((cookie))
bool xen_arch_need_swiotlb(struct device *dev,
phys_addr_t phys,
dma_addr_t dev_addr);

6
include/xen/grant_table.h
View File

@ -101,10 +101,10 @@ int gnttab_end_foreign_access_ref(grant_ref_t ref);
* Eventually end access through the given grant reference, and once that
* access has been ended, free the given page too. Access will be ended
* immediately iff the grant entry is not in use, otherwise it will happen
* some time later. page may be 0, in which case no freeing will occur.
* some time later. page may be NULL, in which case no freeing will occur.
* Note that the granted page might still be accessed (read or write) by the
* other side after gnttab_end_foreign_access() returns, so even if page was
* specified as 0 it is not allowed to just reuse the page for other
* specified as NULL it is not allowed to just reuse the page for other
* purposes immediately. gnttab_end_foreign_access() will take an additional
* reference to the granted page in this case, which is dropped only after
* the grant is no longer in use.
@ -112,7 +112,7 @@ int gnttab_end_foreign_access_ref(grant_ref_t ref);
* gnttab_end_foreign_access() are done via alloc_pages_exact() (and freeing
* via free_pages_exact()) in order to avoid high order pages.
*/
void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page);
void gnttab_end_foreign_access(grant_ref_t ref, struct page *page);
/*
* End access through the given grant reference, iff the grant entry is

8
net/9p/trans_xen.c
View File

@ -279,13 +279,13 @@ static void xen_9pfs_front_free(struct xen_9pfs_front_priv *priv)
grant_ref_t ref;
ref = priv->rings[i].intf->ref[j];
gnttab_end_foreign_access(ref, 0);
gnttab_end_foreign_access(ref, NULL);
}
free_pages_exact(priv->rings[i].data.in,
1UL << (priv->rings[i].intf->ring_order +
XEN_PAGE_SHIFT));
}
gnttab_end_foreign_access(priv->rings[i].ref, 0);
gnttab_end_foreign_access(priv->rings[i].ref, NULL);
free_page((unsigned long)priv->rings[i].intf);
}
kfree(priv->rings);
@ -353,10 +353,10 @@ static int xen_9pfs_front_alloc_dataring(struct xenbus_device *dev,
out:
if (bytes) {
for (i--; i >= 0; i--)
gnttab_end_foreign_access(ring->intf->ref[i], 0);
gnttab_end_foreign_access(ring->intf->ref[i], NULL);
free_pages_exact(bytes, 1UL << (order + XEN_PAGE_SHIFT));
}
gnttab_end_foreign_access(ring->ref, 0);
gnttab_end_foreign_access(ring->ref, NULL);
free_page((unsigned long)ring->intf);
return ret;
}