Do you have an AMD Ryzen or Epyc CPU?

[Mark Kettenis]

Looking for people that can run a kernel with the patch below and mail
me the resulting dmesg.

Thanks,

Mark


Index: arch/amd64/amd64/identcpu.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/identcpu.c,v
retrieving revision 1.96
diff -u -p -r1.96 identcpu.c
--- arch/amd64/amd64/identcpu.c 7 Jun 2018 04:07:28 -0000       1.96
+++ arch/amd64/amd64/identcpu.c 19 Jun 2018 20:27:24 -0000
@@ -803,6 +803,11 @@ cpu_topology(struct cpu_info *ci)
                /* Pkg id is the upper remaining bits */
                ci->ci_pkg_id = apicid & ~core_mask;
                ci->ci_pkg_id >>= core_bits;
+               if (ci->ci_pnfeatset >= 0x8000001e) {
+                       CPUID(0x8000001e, eax, ebx, ecx, edx);
+                       printf("cpu%d: eax 0x%08x ebx 0x%08x ecx 0x%08x\n",
+                           ci->ci_cpuid, eax, ebx, ecx);
+               }
        } else if (strcmp(cpu_vendor, "GenuineIntel") == 0) {
                /* We only support leaf 1/4 detection */
                if (cpuid_level < 4)