releases/4.9.169/powerpc-64s-enhance-the-information-in-cpu_show_spec.patch

   1 From 403103d2fab584f18fbb402a7d0f2bdc81774844 Mon Sep 17 00:00:00 2001
   2 From: Michal Suchanek <msuchanek@suse.de>
   3 Date: Thu, 11 Apr 2019 21:46:04 +1000
   4 Subject: powerpc/64s: Enhance the information in cpu_show_spectre_v1()
   5
   6 commit a377514519b9a20fa1ea9adddbb4129573129cef upstream.
   7
   8 We now have barrier_nospec as mitigation so print it in
   9 cpu_show_spectre_v1() when enabled.
  10
  11 Signed-off-by: Michal Suchanek <msuchanek@suse.de>
  12 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
  13 Signed-off-by: Sasha Levin <sashal@kernel.org>
  14 ---
  15  arch/powerpc/kernel/security.c | 3 +++
  16  1 file changed, 3 insertions(+)
  17
  18 diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
  19 index d0e974da4918..f189f946d935 100644
  20 --- a/arch/powerpc/kernel/security.c
  21 +++ b/arch/powerpc/kernel/security.c
  22 @@ -121,6 +121,9 @@ ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, c
  23         if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR))
  24                 return sprintf(buf, "Not affected\n");
  25
  26 +       if (barrier_nospec_enabled)
  27 +               return sprintf(buf, "Mitigation: __user pointer sanitization\n");
  28 +
  29         return sprintf(buf, "Vulnerable\n");
  30  }
  31
  32 --
  33 2.19.1
  34