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xen: MFN/GFN/BFN terminology changes for 4.3-rc0

Browse source 
- Use the correct GFN/BFN terms more consistently.
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Merge tag 'for-linus-4.3-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen terminology fixes from David Vrabel:
 "Use the correct GFN/BFN terms more consistently"

* tag 'for-linus-4.3-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/xenbus: Rename the variable xen_store_mfn to xen_store_gfn
  xen/privcmd: Further s/MFN/GFN/ clean-up
  hvc/xen: Further s/MFN/GFN clean-up
  video/xen-fbfront: Further s/MFN/GFN clean-up
  xen/tmem: Use xen_page_to_gfn rather than pfn_to_gfn
  xen: Use correctly the Xen memory terminologies
  arm/xen: implement correctly pfn_to_mfn
  xen: Make clear that swiotlb and biomerge are dealing with DMA address
This commit is contained in:
Linus Torvalds 2015-09-10 16:21:11 -07:00
commit 06ab838c20
29 changed files with 198 additions and 158 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/xen/balloon.c
View file

@ -441,7 +441,7 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp)
/* Update direct mapping, invalidate P2M, and add to balloon. */
for (i = 0; i < nr_pages; i++) {
pfn = frame_list[i];
frame_list[i] = pfn_to_mfn(pfn);
frame_list[i] = pfn_to_gfn(pfn);
page = pfn_to_page(pfn);
#ifdef CONFIG_XEN_HAVE_PVMMU

6
drivers/xen/biomerge.c
View file

@ -6,10 +6,10 @@
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2)
{
unsigned long mfn1 = pfn_to_mfn(page_to_pfn(vec1->bv_page));
unsigned long mfn2 = pfn_to_mfn(page_to_pfn(vec2->bv_page));
unsigned long bfn1 = pfn_to_bfn(page_to_pfn(vec1->bv_page));
unsigned long bfn2 = pfn_to_bfn(page_to_pfn(vec2->bv_page));
return __BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&
((mfn1 == mfn2) || ((mfn1+1) == mfn2));
((bfn1 == bfn2) || ((bfn1+1) == bfn2));
}
EXPORT_SYMBOL(xen_biovec_phys_mergeable);

2
drivers/xen/events/events_base.c
View file

@ -1688,7 +1688,7 @@ void __init xen_init_IRQ(void)
struct physdev_pirq_eoi_gmfn eoi_gmfn;
pirq_eoi_map = (void *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
eoi_gmfn.gmfn = virt_to_mfn(pirq_eoi_map);
eoi_gmfn.gmfn = virt_to_gfn(pirq_eoi_map);
rc = HYPERVISOR_physdev_op(PHYSDEVOP_pirq_eoi_gmfn_v2, &eoi_gmfn);
/* TODO: No PVH support for PIRQ EOI */
if (rc != 0) {

4
drivers/xen/events/events_fifo.c
View file

@ -111,7 +111,7 @@ static int init_control_block(int cpu,
for (i = 0; i < EVTCHN_FIFO_MAX_QUEUES; i++)
q->head[i] = 0;
init_control.control_gfn = virt_to_mfn(control_block);
init_control.control_gfn = virt_to_gfn(control_block);
init_control.offset = 0;
init_control.vcpu = cpu;
@ -167,7 +167,7 @@ static int evtchn_fifo_setup(struct irq_info *info)
/* Mask all events in this page before adding it. */
init_array_page(array_page);
expand_array.array_gfn = virt_to_mfn(array_page);
expand_array.array_gfn = virt_to_gfn(array_page);
ret = HYPERVISOR_event_channel_op(EVTCHNOP_expand_array, &expand_array);
if (ret < 0)

3
drivers/xen/gntalloc.c
View file

@ -142,7 +142,8 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op,
/* Grant foreign access to the page. */
rc = gnttab_grant_foreign_access(op->domid,
pfn_to_mfn(page_to_pfn(gref->page)), readonly);
xen_page_to_gfn(gref->page),
readonly);
if (rc < 0)
goto undo;
gref_ids[i] = gref->gref_id = rc;

2
drivers/xen/manage.c
View file

@ -80,7 +80,7 @@ static int xen_suspend(void *data)
* is resuming in a new domain.
*/
si->cancelled = HYPERVISOR_suspend(xen_pv_domain()
? virt_to_mfn(xen_start_info)
? virt_to_gfn(xen_start_info)
: 0);
xen_arch_post_suspend(si->cancelled);

44
drivers/xen/privcmd.c
View file

@ -193,16 +193,16 @@ static int traverse_pages_block(unsigned nelem, size_t size,
return ret;
}
struct mmap_mfn_state {
struct mmap_gfn_state {
unsigned long va;
struct vm_area_struct *vma;
domid_t domain;
};
static int mmap_mfn_range(void *data, void *state)
static int mmap_gfn_range(void *data, void *state)
{
struct privcmd_mmap_entry *msg = data;
struct mmap_mfn_state *st = state;
struct mmap_gfn_state *st = state;
struct vm_area_struct *vma = st->vma;
int rc;
@ -216,7 +216,7 @@ static int mmap_mfn_range(void *data, void *state)
((msg->va+(msg->npages<<PAGE_SHIFT)) > vma->vm_end))
return -EINVAL;
rc = xen_remap_domain_mfn_range(vma,
rc = xen_remap_domain_gfn_range(vma,
msg->va & PAGE_MASK,
msg->mfn, msg->npages,
vma->vm_page_prot,
@ -236,7 +236,7 @@ static long privcmd_ioctl_mmap(void __user *udata)
struct vm_area_struct *vma;
int rc;
LIST_HEAD(pagelist);
struct mmap_mfn_state state;
struct mmap_gfn_state state;
/* We only support privcmd_ioctl_mmap_batch for auto translated. */
if (xen_feature(XENFEAT_auto_translated_physmap))
@ -273,7 +273,7 @@ static long privcmd_ioctl_mmap(void __user *udata)
rc = traverse_pages(mmapcmd.num, sizeof(struct privcmd_mmap_entry),
&pagelist,
mmap_mfn_range, &state);
mmap_gfn_range, &state);
out_up:
@ -299,18 +299,18 @@ struct mmap_batch_state {
int global_error;
int version;
/* User-space mfn array to store errors in the second pass for V1. */
xen_pfn_t __user *user_mfn;
/* User-space gfn array to store errors in the second pass for V1. */
xen_pfn_t __user *user_gfn;
/* User-space int array to store errors in the second pass for V2. */
int __user *user_err;
};
/* auto translated dom0 note: if domU being created is PV, then mfn is
* mfn(addr on bus). If it's auto xlated, then mfn is pfn (input to HAP).
/* auto translated dom0 note: if domU being created is PV, then gfn is
* mfn(addr on bus). If it's auto xlated, then gfn is pfn (input to HAP).
*/
static int mmap_batch_fn(void *data, int nr, void *state)
{
xen_pfn_t *mfnp = data;
xen_pfn_t *gfnp = data;
struct mmap_batch_state *st = state;
struct vm_area_struct *vma = st->vma;
struct page **pages = vma->vm_private_data;
@ -321,8 +321,8 @@ static int mmap_batch_fn(void *data, int nr, void *state)
cur_pages = &pages[st->index];
BUG_ON(nr < 0);
ret = xen_remap_domain_mfn_array(st->vma, st->va & PAGE_MASK, mfnp, nr,
(int *)mfnp, st->vma->vm_page_prot,
ret = xen_remap_domain_gfn_array(st->vma, st->va & PAGE_MASK, gfnp, nr,
(int *)gfnp, st->vma->vm_page_prot,
st->domain, cur_pages);
/* Adjust the global_error? */
@ -347,22 +347,22 @@ static int mmap_return_error(int err, struct mmap_batch_state *st)
if (st->version == 1) {
if (err) {
xen_pfn_t mfn;
xen_pfn_t gfn;
ret = get_user(mfn, st->user_mfn);
ret = get_user(gfn, st->user_gfn);
if (ret < 0)
return ret;
/*
* V1 encodes the error codes in the 32bit top
* nibble of the mfn (with its known
* nibble of the gfn (with its known
* limitations vis-a-vis 64 bit callers).
*/
mfn |= (err == -ENOENT) ?
gfn |= (err == -ENOENT) ?
PRIVCMD_MMAPBATCH_PAGED_ERROR :
PRIVCMD_MMAPBATCH_MFN_ERROR;
return __put_user(mfn, st->user_mfn++);
return __put_user(gfn, st->user_gfn++);
} else
st->user_mfn++;
st->user_gfn++;
} else { /* st->version == 2 */
if (err)
return __put_user(err, st->user_err++);
@ -388,7 +388,7 @@ static int mmap_return_errors(void *data, int nr, void *state)
return 0;
}
/* Allocate pfns that are then mapped with gmfns from foreign domid. Update
/* Allocate pfns that are then mapped with gfns from foreign domid. Update
* the vma with the page info to use later.
* Returns: 0 if success, otherwise -errno
*/
@ -526,7 +526,7 @@ static long privcmd_ioctl_mmap_batch(void __user *udata, int version)
if (state.global_error) {
/* Write back errors in second pass. */
state.user_mfn = (xen_pfn_t *)m.arr;
state.user_gfn = (xen_pfn_t *)m.arr;
state.user_err = m.err;
ret = traverse_pages_block(m.num, sizeof(xen_pfn_t),
&pagelist, mmap_return_errors, &state);
@ -587,7 +587,7 @@ static void privcmd_close(struct vm_area_struct *vma)
if (!xen_feature(XENFEAT_auto_translated_physmap) || !numpgs || !pages)
return;
rc = xen_unmap_domain_mfn_range(vma, numpgs, pages);
rc = xen_unmap_domain_gfn_range(vma, numpgs, pages);
if (rc == 0)
free_xenballooned_pages(numpgs, pages);
else

16
drivers/xen/swiotlb-xen.c
View file

@ -82,8 +82,8 @@ static u64 start_dma_addr;
*/
static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
unsigned long mfn = pfn_to_mfn(PFN_DOWN(paddr));
dma_addr_t dma = (dma_addr_t)mfn << PAGE_SHIFT;
unsigned long bfn = pfn_to_bfn(PFN_DOWN(paddr));
dma_addr_t dma = (dma_addr_t)bfn << PAGE_SHIFT;
dma |= paddr & ~PAGE_MASK;
@ -92,7 +92,7 @@ static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
static inline phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
unsigned long pfn = mfn_to_pfn(PFN_DOWN(baddr));
unsigned long pfn = bfn_to_pfn(PFN_DOWN(baddr));
dma_addr_t dma = (dma_addr_t)pfn << PAGE_SHIFT;
phys_addr_t paddr = dma;
@ -110,15 +110,15 @@ static int check_pages_physically_contiguous(unsigned long pfn,
unsigned int offset,
size_t length)
{
unsigned long next_mfn;
unsigned long next_bfn;
int i;
int nr_pages;
next_mfn = pfn_to_mfn(pfn);
next_bfn = pfn_to_bfn(pfn);
nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
for (i = 1; i < nr_pages; i++) {
if (pfn_to_mfn(++pfn) != ++next_mfn)
if (pfn_to_bfn(++pfn) != ++next_bfn)
return 0;
}
return 1;
@ -138,8 +138,8 @@ static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
{
unsigned long mfn = PFN_DOWN(dma_addr);
unsigned long pfn = mfn_to_local_pfn(mfn);
unsigned long bfn = PFN_DOWN(dma_addr);
unsigned long pfn = bfn_to_local_pfn(bfn);
phys_addr_t paddr;
/* If the address is outside our domain, it CAN

24
drivers/xen/tmem.c
View file

@ -129,21 +129,17 @@ static int xen_tmem_new_pool(struct tmem_pool_uuid uuid,
/* xen generic tmem ops */
static int xen_tmem_put_page(u32 pool_id, struct tmem_oid oid,
u32 index, unsigned long pfn)
u32 index, struct page *page)
{
unsigned long gmfn = xen_pv_domain() ? pfn_to_mfn(pfn) : pfn;
return xen_tmem_op(TMEM_PUT_PAGE, pool_id, oid, index,
gmfn, 0, 0, 0);
xen_page_to_gfn(page), 0, 0, 0);
}
static int xen_tmem_get_page(u32 pool_id, struct tmem_oid oid,
u32 index, unsigned long pfn)
u32 index, struct page *page)
{
unsigned long gmfn = xen_pv_domain() ? pfn_to_mfn(pfn) : pfn;
return xen_tmem_op(TMEM_GET_PAGE, pool_id, oid, index,
gmfn, 0, 0, 0);
xen_page_to_gfn(page), 0, 0, 0);
}
static int xen_tmem_flush_page(u32 pool_id, struct tmem_oid oid, u32 index)
@ -173,14 +169,13 @@ static void tmem_cleancache_put_page(int pool, struct cleancache_filekey key,
{
u32 ind = (u32) index;
struct tmem_oid oid = *(struct tmem_oid *)&key;
unsigned long pfn = page_to_pfn(page);
if (pool < 0)
return;
if (ind != index)
return;
mb(); /* ensure page is quiescent; tmem may address it with an alias */
(void)xen_tmem_put_page((u32)pool, oid, ind, pfn);
(void)xen_tmem_put_page((u32)pool, oid, ind, page);
}
static int tmem_cleancache_get_page(int pool, struct cleancache_filekey key,
@ -188,7 +183,6 @@ static int tmem_cleancache_get_page(int pool, struct cleancache_filekey key,
{
u32 ind = (u32) index;
struct tmem_oid oid = *(struct tmem_oid *)&key;
unsigned long pfn = page_to_pfn(page);
int ret;
/* translate return values to linux semantics */
@ -196,7 +190,7 @@ static int tmem_cleancache_get_page(int pool, struct cleancache_filekey key,
return -1;
if (ind != index)
return -1;
ret = xen_tmem_get_page((u32)pool, oid, ind, pfn);
ret = xen_tmem_get_page((u32)pool, oid, ind, page);
if (ret == 1)
return 0;
else
@ -287,7 +281,6 @@ static int tmem_frontswap_store(unsigned type, pgoff_t offset,
{
u64 ind64 = (u64)offset;
u32 ind = (u32)offset;
unsigned long pfn = page_to_pfn(page);
int pool = tmem_frontswap_poolid;
int ret;
@ -296,7 +289,7 @@ static int tmem_frontswap_store(unsigned type, pgoff_t offset,
if (ind64 != ind)
return -1;
mb(); /* ensure page is quiescent; tmem may address it with an alias */
ret = xen_tmem_put_page(pool, oswiz(type, ind), iswiz(ind), pfn);
ret = xen_tmem_put_page(pool, oswiz(type, ind), iswiz(ind), page);
/* translate Xen tmem return values to linux semantics */
if (ret == 1)
return 0;
@ -313,7 +306,6 @@ static int tmem_frontswap_load(unsigned type, pgoff_t offset,
{
u64 ind64 = (u64)offset;
u32 ind = (u32)offset;
unsigned long pfn = page_to_pfn(page);
int pool = tmem_frontswap_poolid;
int ret;
@ -321,7 +313,7 @@ static int tmem_frontswap_load(unsigned type, pgoff_t offset,
return -1;
if (ind64 != ind)
return -1;
ret = xen_tmem_get_page(pool, oswiz(type, ind), iswiz(ind), pfn);
ret = xen_tmem_get_page(pool, oswiz(type, ind), iswiz(ind), page);
/* translate Xen tmem return values to linux semantics */
if (ret == 1)
return 0;

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

@ -380,7 +380,7 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
for (i = 0; i < nr_pages; i++) {
err = gnttab_grant_foreign_access(dev->otherend_id,
virt_to_mfn(vaddr), 0);
virt_to_gfn(vaddr), 0);
if (err < 0) {
xenbus_dev_fatal(dev, err,
"granting access to ring page");

2
drivers/xen/xenbus/xenbus_dev_backend.c
View file

@ -49,7 +49,7 @@ static long xenbus_alloc(domid_t domid)
goto out_err;
gnttab_grant_foreign_access_ref(GNTTAB_RESERVED_XENSTORE, domid,
virt_to_mfn(xen_store_interface), 0 /* writable */);
virt_to_gfn(xen_store_interface), 0 /* writable */);
arg.dom = DOMID_SELF;
arg.remote_dom = domid;

16
drivers/xen/xenbus/xenbus_probe.c
View file

@ -75,7 +75,7 @@ EXPORT_SYMBOL_GPL(xen_store_interface);
enum xenstore_init xen_store_domain_type;
EXPORT_SYMBOL_GPL(xen_store_domain_type);
static unsigned long xen_store_mfn;
static unsigned long xen_store_gfn;
static BLOCKING_NOTIFIER_HEAD(xenstore_chain);
@ -711,9 +711,7 @@ static int __init xenstored_local_init(void)
if (!page)
goto out_err;
xen_store_mfn = xen_start_info->store_mfn =
pfn_to_mfn(virt_to_phys((void *)page) >>
PAGE_SHIFT);
xen_store_gfn = xen_start_info->store_mfn = virt_to_gfn((void *)page);
/* Next allocate a local port which xenstored can bind to */
alloc_unbound.dom = DOMID_SELF;
@ -787,12 +785,12 @@ static int __init xenbus_init(void)
err = xenstored_local_init();
if (err)
goto out_error;
xen_store_interface = mfn_to_virt(xen_store_mfn);
xen_store_interface = gfn_to_virt(xen_store_gfn);
break;
case XS_PV:
xen_store_evtchn = xen_start_info->store_evtchn;
xen_store_mfn = xen_start_info->store_mfn;
xen_store_interface = mfn_to_virt(xen_store_mfn);
xen_store_gfn = xen_start_info->store_mfn;
xen_store_interface = gfn_to_virt(xen_store_gfn);
break;
case XS_HVM:
err = hvm_get_parameter(HVM_PARAM_STORE_EVTCHN, &v);
@ -802,9 +800,9 @@ static int __init xenbus_init(void)
err = hvm_get_parameter(HVM_PARAM_STORE_PFN, &v);
if (err)
goto out_error;
xen_store_mfn = (unsigned long)v;
xen_store_gfn = (unsigned long)v;
xen_store_interface =
xen_remap(xen_store_mfn << PAGE_SHIFT, PAGE_SIZE);
xen_remap(xen_store_gfn << PAGE_SHIFT, PAGE_SIZE);
break;
default:
pr_warn("Xenstore state unknown\n");

18
drivers/xen/xlate_mmu.c
View file

@ -38,8 +38,8 @@
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
/* map fgmfn of domid to lpfn in the current domain */
static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,
/* map fgfn of domid to lpfn in the current domain */
static int map_foreign_page(unsigned long lpfn, unsigned long fgfn,
unsigned int domid)
{
int rc;
@ -49,7 +49,7 @@ static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,
.size = 1,
.space = XENMAPSPACE_gmfn_foreign,
};
xen_ulong_t idx = fgmfn;
xen_ulong_t idx = fgfn;
xen_pfn_t gpfn = lpfn;
int err = 0;
@ -62,13 +62,13 @@ static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,
}
struct remap_data {
xen_pfn_t *fgmfn; /* foreign domain's gmfn */
xen_pfn_t *fgfn; /* foreign domain's gfn */
pgprot_t prot;
domid_t domid;
struct vm_area_struct *vma;
int index;
struct page **pages;
struct xen_remap_mfn_info *info;
struct xen_remap_gfn_info *info;
int *err_ptr;
int mapped;
};
@ -82,20 +82,20 @@ static int remap_pte_fn(pte_t *ptep, pgtable_t token, unsigned long addr,
pte_t pte = pte_mkspecial(pfn_pte(pfn, info->prot));
int rc;
rc = map_foreign_page(pfn, *info->fgmfn, info->domid);
rc = map_foreign_page(pfn, *info->fgfn, info->domid);
*info->err_ptr++ = rc;
if (!rc) {
set_pte_at(info->vma->vm_mm, addr, ptep, pte);
info->mapped++;
}
info->fgmfn++;
info->fgfn++;
return 0;
}
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *mfn, int nr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned domid,
struct page **pages)
@ -108,7 +108,7 @@ int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
x86 PVOPS */
BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
data.fgmfn = mfn;
data.fgfn = gfn;
data.prot = prot;
data.domid = domid;
data.vma = vma;