Re: [PATCH 09/15] KVM: selftests: Move per-VM GPA into perf_test_args

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On 11/02/21 02:56, Sean Christopherson wrote:
+       pta->gpa = (vm_get_max_gfn(vm) - guest_num_pages) * pta->guest_page_size;
+       pta->gpa &= ~(pta->host_page_size - 1);
Also not related to this patch, but another case for align.

         if (backing_src == VM_MEM_SRC_ANONYMOUS_THP ||
             backing_src == VM_MEM_SRC_ANONYMOUS_HUGETLB)
-               guest_test_phys_mem &= ~(KVM_UTIL_HUGEPAGE_ALIGNMENT - 1);
-
+               pta->gpa &= ~(KVM_UTIL_HUGEPAGE_ALIGNMENT - 1);
also align

  #ifdef __s390x__
         /* Align to 1M (segment size) */
-       guest_test_phys_mem &= ~((1 << 20) - 1);
+       pta->gpa &= ~((1 << 20) - 1);
And here again (oof)

Yep, I'll fix all these and the align() comment in v2.

This is not exactly align in fact; it is x & ~y rather than (x + y) & ~y. Are you going to introduce a round-down macro or is it a bug? (I am lazy...).

Paolo




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