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

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- 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
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39
arch/x86/include/asm/xen/page.h
View file

@ -101,6 +101,11 @@ static inline unsigned long pfn_to_mfn(unsigned long pfn)
{
unsigned long mfn;
/*
* Some x86 code are still using pfn_to_mfn instead of
* pfn_to_mfn. This will have to be removed when we figured
* out which call.
*/
if (xen_feature(XENFEAT_auto_translated_physmap))
return pfn;
@ -147,6 +152,11 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn)
{
unsigned long pfn;
/*
* Some x86 code are still using mfn_to_pfn instead of
* gfn_to_pfn. This will have to be removed when we figure
* out which call.
*/
if (xen_feature(XENFEAT_auto_translated_physmap))
return mfn;
@ -176,6 +186,27 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
}
/* Pseudo-physical <-> Guest conversion */
static inline unsigned long pfn_to_gfn(unsigned long pfn)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return pfn;
else
return pfn_to_mfn(pfn);
}
static inline unsigned long gfn_to_pfn(unsigned long gfn)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return gfn;
else
return mfn_to_pfn(gfn);
}
/* Pseudo-physical <-> Bus conversion */
#define pfn_to_bfn(pfn) pfn_to_gfn(pfn)
#define bfn_to_pfn(bfn) gfn_to_pfn(bfn)
/*
* We detect special mappings in one of two ways:
* 1. If the MFN is an I/O page then Xen will set the m2p entry
@ -196,7 +227,7 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
* require. In all the cases we care about, the FOREIGN_FRAME bit is
* masked (e.g., pfn_to_mfn()) so behaviour there is correct.
*/
static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
static inline unsigned long bfn_to_local_pfn(unsigned long mfn)
{
unsigned long pfn;
@ -215,6 +246,10 @@ static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
/* VIRT <-> GUEST conversion */
#define virt_to_gfn(v) (pfn_to_gfn(virt_to_pfn(v)))
#define gfn_to_virt(g) (__va(gfn_to_pfn(g) << PAGE_SHIFT))
static inline unsigned long pte_mfn(pte_t pte)
{
return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT;
@ -262,7 +297,7 @@ void make_lowmem_page_readwrite(void *vaddr);
static inline bool xen_arch_need_swiotlb(struct device *dev,
unsigned long pfn,
unsigned long mfn)
unsigned long bfn)
{
return false;
}