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| author | Robert Mustacchi <rm@joyent.com> | 2016-12-06 20:05:20 +0000 |
|---|---|---|
| committer | Robert Mustacchi <rm@joyent.com> | 2017-01-03 17:28:10 -0800 |
| commit | b8692e0c2f0c23ce751c0af9c1efb4391bfd00f2 (patch) | |
| tree | 192118e5ea6c503d590605055582f425db0d2c97 | |
| parent | bb8a2a6a74b7eec7d62e371f17d319edb81f8501 (diff) | |
| download | illumos-joyent-b8692e0c2f0c23ce751c0af9c1efb4391bfd00f2.tar.gz | |
7706 cpuid_pass2 can clobber leaf 7
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Toomas Soome <tsoome@me.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
| -rw-r--r-- | usr/src/uts/i86pc/os/cpuid.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/usr/src/uts/i86pc/os/cpuid.c b/usr/src/uts/i86pc/os/cpuid.c index dfb72dacf4..0e8f013ff7 100644 --- a/usr/src/uts/i86pc/os/cpuid.c +++ b/usr/src/uts/i86pc/os/cpuid.c @@ -1793,8 +1793,10 @@ cpuid_pass2(cpu_t *cpu) * * Note: we need to explicitly initialize %ecx here, since * function 4 may have been previously invoked. + * + * The same is all true for CPUID function 7. */ - if (n == 4) + if (n == 4 || n == 7) cp->cp_ecx = 0; (void) __cpuid_insn(cp); |