diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-07-01 10:00:11 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-01 03:47:30 -0400 |
| commit | 828554136bbacae6e39fc31b9cd7e7c660ad7530 (patch) | |
| tree | 4e2ec85ff33c9c1e7245e83ed8e4fa3791007ef7 /arch/s390 | |
| parent | 95c87e2b4460a488ec7ce42f273893e410ab385a (diff) | |
KVM: Remove unnecessary divide operations
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 <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index b95710a1f5dd..cef7dbf69dfc 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h | |||
| @@ -41,7 +41,8 @@ struct sca_block { | |||
| 41 | } __attribute__((packed)); | 41 | } __attribute__((packed)); |
| 42 | 42 | ||
| 43 | #define KVM_NR_PAGE_SIZES 2 | 43 | #define KVM_NR_PAGE_SIZES 2 |
| 44 | #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + ((x) - 1) * 8) | 44 | #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 8) |
| 45 | #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) | ||
| 45 | #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) | 46 | #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) |
| 46 | #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) | 47 | #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) |
| 47 | #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) | 48 | #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) |