AMD Epyc processors doesn't support get_tsc_freq_arch(). The patch allows graceful return to allow fallback to alternate TSC calibration.
Fixes: 3dbc565e81a0 ("timer: honor arch-specific TSC frequency query") Cc: jerin.ja...@caviumnetworks.com Cc: sta...@dpdk.org Signed-off-by: Sivaprasad Tummala <sivaprasad.tumm...@amd.com> --- lib/eal/x86/rte_cycles.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/eal/x86/rte_cycles.c b/lib/eal/x86/rte_cycles.c index 69ed59b4f0..f147a5231d 100644 --- a/lib/eal/x86/rte_cycles.c +++ b/lib/eal/x86/rte_cycles.c @@ -10,6 +10,10 @@ #include <cpuid.h> #endif +#define x86_vendor_amd(t1, t2, t3) \ + ((t1 == 0x68747541) && /* htuA */ \ + (t2 == 0x444d4163) && /* DMAc */ \ + (t3 == 0x69746e65)) /* itne */ #include "eal_private.h" @@ -110,6 +114,18 @@ get_tsc_freq_arch(void) uint8_t mult, model; int32_t ret; +#ifdef RTE_TOOLCHAIN_MSVC + __cpuid(cpuinfo, 0); + a = cpuinfo[0]; + b = cpuinfo[1]; + c = cpuinfo[2]; + d = cpuinfo[3]; +#else + __cpuid(0, a, b, c, d); +#endif + if (x86_vendor_amd(b, c, d)) + return 0; + /* * Time Stamp Counter and Nominal Core Crystal Clock * Information Leaf -- 2.34.1