# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID f56b7ade7068d8ff0240d13f24a8516da2ab52ea
# Parent 3cc7e419b9493485bf67d5a197017cdcd4e3baac
[BLKTAP] ia64 support
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c | 164 ++++++++++++++-------
linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h | 16 ++
tools/libxc/xenctrl.h | 7
3 files changed, 129 insertions(+), 58 deletions(-)
diff -r 3cc7e419b949 -r f56b7ade7068
linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c
--- a/linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c Tue Nov 07 11:14:52
2006 +0000
+++ b/linux-2.6-xen-sparse/drivers/xen/blktap/blktap.c Tue Nov 07 11:17:39
2006 +0000
@@ -887,6 +887,15 @@ static void fast_flush_area(pending_req_
return;
}
+ if (info->vma != NULL &&
+ xen_feature(XENFEAT_auto_translated_physmap)) {
+ down_write(&info->vma->vm_mm->mmap_sem);
+ zap_page_range(info->vma,
+ MMAP_VADDR(info->user_vstart, u_idx, 0),
+ req->nr_pages << PAGE_SHIFT, NULL);
+ up_write(&info->vma->vm_mm->mmap_sem);
+ }
+
mmap_idx = req->mem_idx;
for (i = 0; i < req->nr_pages; i++) {
@@ -903,6 +912,7 @@ static void fast_flush_area(pending_req_
}
if (khandle->user != INVALID_GRANT_HANDLE) {
+ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
if (create_lookup_pte_addr(
info->vma->vm_mm,
MMAP_VADDR(info->user_vstart, u_idx, i),
@@ -925,7 +935,7 @@ static void fast_flush_area(pending_req_
GNTTABOP_unmap_grant_ref, unmap, invcount);
BUG_ON(ret);
- if (info->vma != NULL)
+ if (info->vma != NULL && !xen_feature(XENFEAT_auto_translated_physmap))
zap_page_range(info->vma,
MMAP_VADDR(info->user_vstart, u_idx, 0),
req->nr_pages << PAGE_SHIFT, NULL);
@@ -1254,68 +1264,103 @@ static void dispatch_rw_block_io(blkif_t
req->seg[i].gref, blkif->domid);
op++;
- /* Now map it to user. */
- ret = create_lookup_pte_addr(info->vma->vm_mm,
- uvaddr, &ptep);
- if (ret) {
- WPRINTK("Couldn't get a pte addr!\n");
- goto fail_flush;
- }
-
- flags = GNTMAP_host_map | GNTMAP_application_map
- | GNTMAP_contains_pte;
- if (operation == WRITE)
- flags |= GNTMAP_readonly;
- gnttab_set_map_op(&map[op], ptep, flags,
- req->seg[i].gref, blkif->domid);
- op++;
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ /* Now map it to user. */
+ ret = create_lookup_pte_addr(info->vma->vm_mm,
+ uvaddr, &ptep);
+ if (ret) {
+ WPRINTK("Couldn't get a pte addr!\n");
+ goto fail_flush;
+ }
+
+ flags = GNTMAP_host_map | GNTMAP_application_map
+ | GNTMAP_contains_pte;
+ if (operation == WRITE)
+ flags |= GNTMAP_readonly;
+ gnttab_set_map_op(&map[op], ptep, flags,
+ req->seg[i].gref, blkif->domid);
+ op++;
+ }
}
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, op);
BUG_ON(ret);
- for (i = 0; i < (nseg*2); i+=2) {
- unsigned long uvaddr;
- unsigned long kvaddr;
- unsigned long offset;
- struct page *pg;
-
- uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i/2);
- kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i/2);
-
- if (unlikely(map[i].status != 0)) {
- WPRINTK("invalid kernel buffer -- "
- "could not remap it\n");
- ret |= 1;
- map[i].handle = INVALID_GRANT_HANDLE;
- }
-
- if (unlikely(map[i+1].status != 0)) {
- WPRINTK("invalid user buffer -- "
- "could not remap it\n");
- ret |= 1;
- map[i+1].handle = INVALID_GRANT_HANDLE;
- }
-
- pending_handle(mmap_idx, pending_idx, i/2).kernel
- = map[i].handle;
- pending_handle(mmap_idx, pending_idx, i/2).user
- = map[i+1].handle;
-
- if (ret)
- continue;
-
- set_phys_to_machine(__pa(kvaddr) >> PAGE_SHIFT,
- FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
- offset = (uvaddr - info->vma->vm_start) >> PAGE_SHIFT;
- pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
- ((struct page **)info->vma->vm_private_data)[offset] =
- pg;
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ for (i = 0; i < (nseg*2); i+=2) {
+ unsigned long uvaddr;
+ unsigned long kvaddr;
+ unsigned long offset;
+ struct page *pg;
+
+ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i/2);
+ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i/2);
+
+ if (unlikely(map[i].status != 0)) {
+ WPRINTK("invalid kernel buffer -- "
+ "could not remap it\n");
+ ret |= 1;
+ map[i].handle = INVALID_GRANT_HANDLE;
+ }
+
+ if (unlikely(map[i+1].status != 0)) {
+ WPRINTK("invalid user buffer -- "
+ "could not remap it\n");
+ ret |= 1;
+ map[i+1].handle = INVALID_GRANT_HANDLE;
+ }
+
+ pending_handle(mmap_idx, pending_idx, i/2).kernel
+ = map[i].handle;
+ pending_handle(mmap_idx, pending_idx, i/2).user
+ = map[i+1].handle;
+
+ if (ret)
+ continue;
+
+ set_phys_to_machine(__pa(kvaddr) >> PAGE_SHIFT,
+ FOREIGN_FRAME(map[i].dev_bus_addr
+ >> PAGE_SHIFT));
+ offset = (uvaddr - info->vma->vm_start) >> PAGE_SHIFT;
+ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
+ ((struct page **)info->vma->vm_private_data)[offset] =
+ pg;
+ }
+ } else {
+ for (i = 0; i < nseg; i++) {
+ unsigned long uvaddr;
+ unsigned long kvaddr;
+ unsigned long offset;
+ struct page *pg;
+
+ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i);
+ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
+
+ if (unlikely(map[i].status != 0)) {
+ WPRINTK("invalid kernel buffer -- "
+ "could not remap it\n");
+ ret |= 1;
+ map[i].handle = INVALID_GRANT_HANDLE;
+ }
+
+ pending_handle(mmap_idx, pending_idx, i).kernel
+ = map[i].handle;
+
+ if (ret)
+ continue;
+
+ offset = (uvaddr - info->vma->vm_start) >> PAGE_SHIFT;
+ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
+ ((struct page **)info->vma->vm_private_data)[offset] =
+ pg;
+ }
}
if (ret)
goto fail_flush;
+ if (xen_feature(XENFEAT_auto_translated_physmap))
+ down_write(&info->vma->vm_mm->mmap_sem);
/* Mark mapped pages as reserved: */
for (i = 0; i < req->nr_segments; i++) {
unsigned long kvaddr;
@@ -1324,7 +1369,18 @@ static void dispatch_rw_block_io(blkif_t
kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
SetPageReserved(pg);
- }
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ ret = vm_insert_page(info->vma,
+ MMAP_VADDR(info->user_vstart,
+ usr_idx, i), pg);
+ if (ret) {
+ up_write(&info->vma->vm_mm->mmap_sem);
+ goto fail_flush;
+ }
+ }
+ }
+ if (xen_feature(XENFEAT_auto_translated_physmap))
+ up_write(&info->vma->vm_mm->mmap_sem);
/*record [mmap_idx,pending_idx] to [usr_idx] mapping*/
info->idx_map[usr_idx] = MAKE_ID(mmap_idx, pending_idx);
diff -r 3cc7e419b949 -r f56b7ade7068
linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h
--- a/linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h Tue Nov 07
11:14:52 2006 +0000
+++ b/linux-2.6-xen-sparse/include/asm-ia64/hypervisor.h Tue Nov 07
11:17:39 2006 +0000
@@ -191,6 +191,22 @@ MULTI_grant_table_op(multicall_entry_t *
mcl->args[2] = count;
}
+/*
+ * for blktap.c
+ * int create_lookup_pte_addr(struct mm_struct *mm,
+ * unsigned long address,
+ * uint64_t *ptep);
+ */
+#define create_lookup_pte_addr(mm, address, ptep) \
+ ({ \
+ printk(KERN_EMERG \
+ "%s:%d " \
+ "create_lookup_pte_addr() isn't supported.\n", \
+ __func__, __LINE__); \
+ BUG(); \
+ (-ENOSYS); \
+ })
+
// for debug
asmlinkage int xprintk(const char *fmt, ...);
#define xprintd(fmt, ...) xprintk("%s:%d " fmt, __func__, __LINE__, \
diff -r 3cc7e419b949 -r f56b7ade7068 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Tue Nov 07 11:14:52 2006 +0000
+++ b/tools/libxc/xenctrl.h Tue Nov 07 11:17:39 2006 +0000
@@ -47,10 +47,9 @@
#define rmb() __asm__ __volatile__ ( "lfence" : : : "memory")
#define wmb() __asm__ __volatile__ ( "" : : : "memory")
#elif defined(__ia64__)
-/* FIXME */
-#define mb()
-#define rmb()
-#define wmb()
+#define mb() __asm__ __volatile__ ("mf" ::: "memory")
+#define rmb() __asm__ __volatile__ ("mf" ::: "memory")
+#define wmb() __asm__ __volatile__ ("mf" ::: "memory")
#elif defined(__powerpc__)
/* XXX loosen these up later */
#define mb() __asm__ __volatile__ ("sync" : : : "memory")
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