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| author | Juergen Gross <jgross@suse.com> | 2014-11-28 11:53:57 +0100 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-12-04 15:09:09 +0100 |
| commit | 0aad5689837c882d2539f50f42f686b74046c0a0 (patch) | |
| tree | 5367d28f3b43ed9dba583106ffc2364e3ef67c23 /arch/x86/xen/p2m.c | |
| parent | x86: Introduce function to get pmd entry pointer (diff) | |
| download | linux-0aad5689837c882d2539f50f42f686b74046c0a0.tar.xz linux-0aad5689837c882d2539f50f42f686b74046c0a0.zip | |
xen: Hide get_phys_to_machine() to be able to tune common path
Today get_phys_to_machine() is always called when the mfn for a pfn
is to be obtained. Add a wrapper __pfn_to_mfn() as inline function
to be able to avoid calling get_phys_to_machine() when possible as
soon as the switch to a linear mapped p2m list has been done.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86/xen/p2m.c')
| -rw-r--r-- | arch/x86/xen/p2m.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index eddec40a4c20..8c3d8fbbba93 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -787,7 +787,7 @@ static int m2p_add_override(unsigned long mfn, struct page *page, * because mfn_to_pfn (that ends up being called by GUPF) will * return the backend pfn rather than the frontend pfn. */ pfn = mfn_to_pfn_no_overrides(mfn); - if (get_phys_to_machine(pfn) == mfn) + if (__pfn_to_mfn(pfn) == mfn) set_phys_to_machine(pfn, FOREIGN_FRAME(mfn)); return 0; @@ -967,7 +967,7 @@ static int m2p_remove_override(struct page *page, * pfn again. */ mfn &= ~FOREIGN_FRAME_BIT; pfn = mfn_to_pfn_no_overrides(mfn); - if (get_phys_to_machine(pfn) == FOREIGN_FRAME(mfn) && + if (__pfn_to_mfn(pfn) == FOREIGN_FRAME(mfn) && m2p_find_override(mfn) == NULL) set_phys_to_machine(pfn, mfn); @@ -992,7 +992,7 @@ int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, } for (i = 0; i < count; i++) { - unsigned long mfn = get_phys_to_machine(page_to_pfn(pages[i])); + unsigned long mfn = __pfn_to_mfn(page_to_pfn(pages[i])); unsigned long pfn = page_to_pfn(pages[i]); if (mfn == INVALID_P2M_ENTRY || !(mfn & FOREIGN_FRAME_BIT)) { |