queue-4.4/powerpc-64s-enhance-the-information-in-cpu_show_spectre_v1.patch

   1 From foo@baz Mon 29 Apr 2019 11:38:37 AM CEST
   2 From: Michael Ellerman <mpe@ellerman.id.au>
   3 Date: Mon, 22 Apr 2019 00:20:16 +1000
   4 Subject: powerpc/64s: Enhance the information in cpu_show_spectre_v1()
   5 To: stable@vger.kernel.org, gregkh@linuxfoundation.org
   6 Cc: linuxppc-dev@ozlabs.org, diana.craciun@nxp.com, msuchanek@suse.de, npiggin@gmail.com, christophe.leroy@c-s.fr
   7 Message-ID: <20190421142037.21881-32-mpe@ellerman.id.au>
   8
   9 From: Michal Suchanek <msuchanek@suse.de>
  10
  11 commit a377514519b9a20fa1ea9adddbb4129573129cef upstream.
  12
  13 We now have barrier_nospec as mitigation so print it in
  14 cpu_show_spectre_v1() when enabled.
  15
  16 Signed-off-by: Michal Suchanek <msuchanek@suse.de>
  17 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19 ---
  20  arch/powerpc/kernel/security.c |    3 +++
  21  1 file changed, 3 insertions(+)
  22
  23 --- a/arch/powerpc/kernel/security.c
  24 +++ b/arch/powerpc/kernel/security.c
  25 @@ -121,6 +121,9 @@ ssize_t cpu_show_spectre_v1(struct devic
  26         if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR))
  27                 return sprintf(buf, "Not affected\n");
  28
  29 +       if (barrier_nospec_enabled)
  30 +               return sprintf(buf, "Mitigation: __user pointer sanitization\n");
  31 +
  32         return sprintf(buf, "Vulnerable\n");
  33  }
  34