From f7bfb57b3e89ff89c0da9f93dedab89f68d6ca27 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Mon, 15 Jun 2015 16:55:32 +0800 Subject: [PATCH] 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 [Adjust for range_size->range_shift change. - Paolo] Signed-off-by: Paolo Bonzini --- arch/x86/kvm/mtrr.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c index faa582488bb8..b5346d20f458 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; -- GitLab