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author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-06-15 08:55:32 (GMT) |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-19 15:16:28 (GMT) |
commit | f7bfb57b3e89ff89c0da9f93dedab89f68d6ca27 (patch) | |
tree | a27ab306e80b1d48705a61335122f4aa30175324 /arch/x86/kvm/mtrr.c | |
parent | 19efffa244071ccd0385b240d03adb38feaab04e (diff) | |
download | linux-f7bfb57b3e89ff89c0da9f93dedab89f68d6ca27.tar.xz |
KVM: MTRR: introduce fixed_mtrr_addr_* functions
Two functions are introduced:
- fixed_mtrr_addr_to_seg() translates the address to the fixed
MTRR segment
- fixed_mtrr_addr_seg_to_range_index() translates the address to
the index of kvm_mtrr.fixed_ranges[]
They will be used in the later patch
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
[Adjust for range_size->range_shift change. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mtrr.c')
-rw-r--r-- | arch/x86/kvm/mtrr.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c index faa5824..b5346d2 100644 --- a/arch/x86/kvm/mtrr.c +++ b/arch/x86/kvm/mtrr.c @@ -241,6 +241,31 @@ static int fixed_msr_to_range_index(u32 msr) return fixed_mtrr_seg_unit_range_index(seg, unit); } +static int fixed_mtrr_addr_to_seg(u64 addr) +{ + struct fixed_mtrr_segment *mtrr_seg; + int seg, seg_num = ARRAY_SIZE(fixed_seg_table); + + for (seg = 0; seg < seg_num; seg++) { + mtrr_seg = &fixed_seg_table[seg]; + if (mtrr_seg->start >= addr && addr < mtrr_seg->end) + return seg; + } + + return -1; +} + +static int fixed_mtrr_addr_seg_to_range_index(u64 addr, int seg) +{ + struct fixed_mtrr_segment *mtrr_seg; + int index; + + mtrr_seg = &fixed_seg_table[seg]; + index = mtrr_seg->range_start; + index += (addr - mtrr_seg->start) >> mtrr_seg->range_shift; + return index; +} + static void var_mtrr_range(struct kvm_mtrr_range *range, u64 *start, u64 *end) { u64 mask; |