From: Leonid Shatz <leonid.sh...@ravellosystems.com>
The "normal" detection (querying clflush size) already made sure it is
non-zero, however another method did not. This lead to crashes if this
value happened to be zero (apparently can happen in virtualized environments
at least).
This fixes https://bugs.freedesktop.org/show_bug.cgi?id=87913
Cc: "10.4" <mesa-sta...@lists.freedesktop.org>
---
src/gallium/auxiliary/util/u_cpu_detect.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c
b/src/gallium/auxiliary/util/u_cpu_detect.c
index 28197f4..23ab46c 100644
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -409,8 +409,12 @@ util_cpu_detect(void)
}
if (regs[0] >= 0x80000006) {
+ /* should we really do this if the clflush size above worked? */
+ unsigned int cacheline;
cpuid(0x80000006, regs2);
- util_cpu_caps.cacheline = regs2[2] & 0xFF;
+ cacheline = regs2[2] & 0xFF;
+ if (cacheline > 0)
+ util_cpu_caps.cacheline = cacheline;
}
if (!util_cpu_caps.has_sse) {
--
1.9.1
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