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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-03 12:51:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-03 12:51:46 -0700
commit6cd3d4019ba3f45aa1a87e4e914e81d367b59937 (patch)
treee27e6c3d01a85d74a977087fa50ae410272e68e9 /drivers/xen
parent0adb8bc0391f1fa7820529c0200fb0c4912fe365 (diff)
parentc3881eb58d56116c79ac4ee4f40fd15ead124c4b (diff)
Merge tag 'for-linus-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross: - a cleanup patch removing an unused function - a small fix for the xen pciback driver - a series for making the unwinder hyppay with the Xen PV guest idle task stacks * tag 'for-linus-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: x86/xen: Make the secondary CPU idle tasks reliable x86/xen: Make the boot CPU idle task reliable xen-pciback: fix INTERRUPT_TYPE_* defines xen/xenbus: remove unused xenbus_map_ring()
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/xen-pciback/conf_space.c2
-rw-r--r--drivers/xen/xen-pciback/conf_space.h8
-rw-r--r--drivers/xen/xenbus/xenbus_client.c126
3 files changed, 47 insertions, 89 deletions
diff --git a/drivers/xen/xen-pciback/conf_space.c b/drivers/xen/xen-pciback/conf_space.c
index b20e43e148ce..da51a5d34e6e 100644
--- a/drivers/xen/xen-pciback/conf_space.c
+++ b/drivers/xen/xen-pciback/conf_space.c
@@ -320,7 +320,7 @@ int xen_pcibk_get_interrupt_type(struct pci_dev *dev)
if (val & PCI_MSIX_FLAGS_ENABLE)
ret |= INTERRUPT_TYPE_MSIX;
}
- return ret;
+ return ret ?: INTERRUPT_TYPE_NONE;
}
void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev)
diff --git a/drivers/xen/xen-pciback/conf_space.h b/drivers/xen/xen-pciback/conf_space.h
index 28c45180a12e..5fe431c79f25 100644
--- a/drivers/xen/xen-pciback/conf_space.h
+++ b/drivers/xen/xen-pciback/conf_space.h
@@ -65,10 +65,10 @@ struct config_field_entry {
void *data;
};
-#define INTERRUPT_TYPE_NONE (1<<0)
-#define INTERRUPT_TYPE_INTX (1<<1)
-#define INTERRUPT_TYPE_MSI (1<<2)
-#define INTERRUPT_TYPE_MSIX (1<<3)
+#define INTERRUPT_TYPE_NONE (0)
+#define INTERRUPT_TYPE_INTX (1<<0)
+#define INTERRUPT_TYPE_MSI (1<<1)
+#define INTERRUPT_TYPE_MSIX (1<<2)
extern bool xen_pcibk_permissive;
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index e17ca8156171..31eb822ac313 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -517,6 +517,48 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
return err;
}
+/**
+ * xenbus_unmap_ring
+ * @dev: xenbus device
+ * @handles: grant handle array
+ * @nr_handles: number of handles in the array
+ * @vaddrs: addresses to unmap
+ *
+ * Unmap memory in this domain that was imported from another domain.
+ * Returns 0 on success and returns GNTST_* on error
+ * (see xen/include/interface/grant_table.h).
+ */
+static int xenbus_unmap_ring(struct xenbus_device *dev, grant_handle_t *handles,
+ unsigned int nr_handles, unsigned long *vaddrs)
+{
+ struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
+ int i;
+ int err;
+
+ if (nr_handles > XENBUS_MAX_RING_GRANTS)
+ return -EINVAL;
+
+ for (i = 0; i < nr_handles; i++)
+ gnttab_set_unmap_op(&unmap[i], vaddrs[i],
+ GNTMAP_host_map, handles[i]);
+
+ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
+ BUG();
+
+ err = GNTST_okay;
+ for (i = 0; i < nr_handles; i++) {
+ if (unmap[i].status != GNTST_okay) {
+ xenbus_dev_error(dev, unmap[i].status,
+ "unmapping page at handle %d error %d",
+ handles[i], unmap[i].status);
+ err = unmap[i].status;
+ break;
+ }
+ }
+
+ return err;
+}
+
struct map_ring_valloc_hvm
{
unsigned int idx;
@@ -608,45 +650,6 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
return err;
}
-
-/**
- * xenbus_map_ring
- * @dev: xenbus device
- * @gnt_refs: grant reference array
- * @nr_grefs: number of grant reference
- * @handles: pointer to grant handle to be filled
- * @vaddrs: addresses to be mapped to
- * @leaked: fail to clean up a failed map, caller should not free vaddr
- *
- * Map pages of memory into this domain from another domain's grant table.
- * xenbus_map_ring does not allocate the virtual address space (you must do
- * this yourself!). It only maps in the pages to the specified address.
- * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
- * or -ENOMEM / -EINVAL on error. If an error is returned, device will switch to
- * XenbusStateClosing and the first error message will be saved in XenStore.
- * Further more if we fail to map the ring, caller should check @leaked.
- * If @leaked is not zero it means xenbus_map_ring fails to clean up, caller
- * should not free the address space of @vaddr.
- */
-int xenbus_map_ring(struct xenbus_device *dev, grant_ref_t *gnt_refs,
- unsigned int nr_grefs, grant_handle_t *handles,
- unsigned long *vaddrs, bool *leaked)
-{
- phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS];
- int i;
-
- if (nr_grefs > XENBUS_MAX_RING_GRANTS)
- return -EINVAL;
-
- for (i = 0; i < nr_grefs; i++)
- phys_addrs[i] = (unsigned long)vaddrs[i];
-
- return __xenbus_map_ring(dev, gnt_refs, nr_grefs, handles,
- phys_addrs, GNTMAP_host_map, leaked);
-}
-EXPORT_SYMBOL_GPL(xenbus_map_ring);
-
-
/**
* xenbus_unmap_ring_vfree
* @dev: xenbus device
@@ -859,51 +862,6 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr)
}
/**
- * xenbus_unmap_ring
- * @dev: xenbus device
- * @handles: grant handle array
- * @nr_handles: number of handles in the array
- * @vaddrs: addresses to unmap
- *
- * Unmap memory in this domain that was imported from another domain.
- * Returns 0 on success and returns GNTST_* on error
- * (see xen/include/interface/grant_table.h).
- */
-int xenbus_unmap_ring(struct xenbus_device *dev,
- grant_handle_t *handles, unsigned int nr_handles,
- unsigned long *vaddrs)
-{
- struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
- int i;
- int err;
-
- if (nr_handles > XENBUS_MAX_RING_GRANTS)
- return -EINVAL;
-
- for (i = 0; i < nr_handles; i++)
- gnttab_set_unmap_op(&unmap[i], vaddrs[i],
- GNTMAP_host_map, handles[i]);
-
- if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
- BUG();
-
- err = GNTST_okay;
- for (i = 0; i < nr_handles; i++) {
- if (unmap[i].status != GNTST_okay) {
- xenbus_dev_error(dev, unmap[i].status,
- "unmapping page at handle %d error %d",
- handles[i], unmap[i].status);
- err = unmap[i].status;
- break;
- }
- }
-
- return err;
-}
-EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
-
-
-/**
* xenbus_read_driver_state
* @path: path for driver
*