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authorChristoffer Dall <christoffer.dall@linaro.org>2013-10-02 14:22:28 -0700
committerGleb Natapov <gleb@redhat.com>2013-10-14 10:11:44 +0300
commit6d9d41e57440e32a3400f37aa05ef7a1a09ced64 (patch)
tree150c27fc74edb392cce5a116b2042c976554853b /arch/x86/include/asm/kvm_host.h
parent7854cbca815562a49d50bbc6f31599312853d1f4 (diff)
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KVM: Move gfn_to_index to x86 specific code
The gfn_to_index function relies on huge page defines which either may not make sense on systems that don't support huge pages or are defined in an unconvenient way for other architectures. Since this is x86-specific, move the function to arch/x86/include/asm/kvm_host.h. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
-rw-r--r--arch/x86/include/asm/kvm_host.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 8dd143a..5cbf316 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -79,6 +79,13 @@
#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
#define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
+static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
+{
+ /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
+ return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
+ (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
+}
+
#define SELECTOR_TI_MASK (1 << 2)
#define SELECTOR_RPL_MASK 0x03
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