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KVM: Remove unnecessary divide operations

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This patch converts unnecessary divide and modulo operations
in the KVM large page related code into logical operations.
This allows to convert gfn_t to u64 while not breaking 32
bit builds.

Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
This commit is contained in:
Joerg Roedel 2010-07-01 16:00:11 +02:00 • committed by Avi Kivity
commit 828554136b
6 changed files with 15 additions and 11 deletions
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3
arch/s390/include/asm/kvm_host.h
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@ -41,7 +41,8 @@ struct sca_block {
} __attribute__((packed));
#define KVM_NR_PAGE_SIZES 2
#define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + ((x) - 1) * 8)
#define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 8)
#define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
#define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
#define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)