[Bug 1926044] Re: QEMU-user doesn't report HWCAP2_MTE

[Thomas Huth]

Patch has been merged:
https://gitlab.com/qemu-project/qemu/-/commit/68948d18224b93361e28

** Changed in: qemu
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1926044

Title:
  QEMU-user doesn't report HWCAP2_MTE

Status in QEMU:
  Fix Committed

Bug description:
  Reproducible on ffa090bc56e73e287a63261e70ac02c0970be61a

  Host Debian 5.10.24 x86_64 GNU

  Configured with "configure --disable-system --enable-linux-user
  --static"

  This one works and prints "OK" as expected:
  clang tests/tcg/aarch64/mte-3.c -target aarch64-linux-gnu  -fsanitize=memtag 
-march=armv8+memtag
  qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out && echo OK

  
  This one fails and print "0":
  cat mytest.c
  #include <stdio.h>
  #include <sys/auxv.h>

  #ifndef HWCAP2_MTE
  #define HWCAP2_MTE (1 << 18)
  #endif

  int main(int ac, char **av)
  {
      printf("%d\n", (int)(getauxval(AT_HWCAP2) & HWCAP2_MTE));
  }

  
  clang mytest.c -target aarch64-linux-gnu  -fsanitize=memtag 
-march=armv8+memtag
  qemu-aarch64 --cpu max -L /usr/aarch64-linux-gnu ./a.out

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