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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 10:09:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 10:09:59 -0800
commit90160371b3a3e67ef78d68210a94dd30664a703d (patch)
tree2841ea811be129133cf9b83d9c3badd96e7ffab4 /arch/x86
parentae5cfc0546ca2698b9dcddf72accbd70e57590a0 (diff)
parent6c254de16a1d14c1ac931d3aa08dc88ac9fc582b (diff)
Merge branch 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (37 commits) xen/pciback: Expand the warning message to include domain id. xen/pciback: Fix "device has been assigned to X domain!" warning xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind" xen/xenbus: don't reimplement kvasprintf via a fixed size buffer xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX. Xen: consolidate and simplify struct xenbus_driver instantiation xen-gntalloc: introduce missing kfree xen/xenbus: Fix compile error - missing header for xen_initial_domain() xen/netback: Enable netback on HVM guests xen/grant-table: Support mappings required by blkback xenbus: Use grant-table wrapper functions xenbus: Support HVM backends xen/xenbus-frontend: Fix compile error with randconfig xen/xenbus-frontend: Make error message more clear xen/privcmd: Remove unused support for arch specific privcmp mmap xen: Add xenbus_backend device xen: Add xenbus device driver xen: Add privcmd device driver xen/gntalloc: fix reference counts on multi-page mappings ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/xen/Kconfig4
-rw-r--r--arch/x86/xen/grant-table.c44
2 files changed, 43 insertions, 5 deletions
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 26c731a106af..fdce49c7aff6 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -29,7 +29,8 @@ config XEN_PVHVM
config XEN_MAX_DOMAIN_MEMORY
int
- default 128
+ default 500 if X86_64
+ default 64 if X86_32
depends on XEN
help
This only affects the sizing of some bss arrays, the unused
@@ -48,3 +49,4 @@ config XEN_DEBUG_FS
help
Enable statistics output and various tuning options in debugfs.
Enabling this option may incur a significant performance overhead.
+
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c
index 5a40d24ba331..3a5f55d51907 100644
--- a/arch/x86/xen/grant-table.c
+++ b/arch/x86/xen/grant-table.c
@@ -54,6 +54,20 @@ static int map_pte_fn(pte_t *pte, struct page *pmd_page,
return 0;
}
+/*
+ * This function is used to map shared frames to store grant status. It is
+ * different from map_pte_fn above, the frames type here is uint64_t.
+ */
+static int map_pte_fn_status(pte_t *pte, struct page *pmd_page,
+ unsigned long addr, void *data)
+{
+ uint64_t **frames = (uint64_t **)data;
+
+ set_pte_at(&init_mm, addr, pte, mfn_pte((*frames)[0], PAGE_KERNEL));
+ (*frames)++;
+ return 0;
+}
+
static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
unsigned long addr, void *data)
{
@@ -64,10 +78,10 @@ static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
unsigned long max_nr_gframes,
- struct grant_entry **__shared)
+ void **__shared)
{
int rc;
- struct grant_entry *shared = *__shared;
+ void *shared = *__shared;
if (shared == NULL) {
struct vm_struct *area =
@@ -83,8 +97,30 @@ int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
return rc;
}
-void arch_gnttab_unmap_shared(struct grant_entry *shared,
- unsigned long nr_gframes)
+int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
+ unsigned long max_nr_gframes,
+ grant_status_t **__shared)
+{
+ int rc;
+ grant_status_t *shared = *__shared;
+
+ if (shared == NULL) {
+ /* No need to pass in PTE as we are going to do it
+ * in apply_to_page_range anyhow. */
+ struct vm_struct *area =
+ alloc_vm_area(PAGE_SIZE * max_nr_gframes, NULL);
+ BUG_ON(area == NULL);
+ shared = area->addr;
+ *__shared = shared;
+ }
+
+ rc = apply_to_page_range(&init_mm, (unsigned long)shared,
+ PAGE_SIZE * nr_gframes,
+ map_pte_fn_status, &frames);
+ return rc;
+}
+
+void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
{
apply_to_page_range(&init_mm, (unsigned long)shared,
PAGE_SIZE * nr_gframes, unmap_pte_fn, NULL);