FreeBSD Bugzilla – Attachment 207346 Details for
Bug 240475
[PATCH]: Add support for CPUID 0x16 in tsc_freq_cpuid() (TSC clock)
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[patch]
Patch (Revision 1)
cpuid-0x16-tsc.patch (text/plain), 614 bytes, created by
Neel Chauhan
on 2019-09-10 15:01:56 UTC
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Description:
Patch (Revision 1)
Filename:
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Creator:
Neel Chauhan
Created:
2019-09-10 15:01:56 UTC
Size:
614 bytes
patch
obsolete
>Index: sys/x86/x86/tsc.c >=================================================================== >--- sys/x86/x86/tsc.c (revision 352137) >+++ sys/x86/x86/tsc.c (working copy) >@@ -146,8 +146,15 @@ > if (cpu_high < 0x15) > return (false); > do_cpuid(0x15, regs); >- if (regs[0] == 0 || regs[1] == 0 || regs[2] == 0) >+ if (regs[0] == 0 || regs[1] == 0 || regs[2] == 0) { >+ if (cpu_high >= 0x16) { >+ u_int freq_regs[4]; >+ do_cpuid(0x16, freq_regs); >+ tsc_freq = (uint64_t) freq_regs[0] * 1000000; >+ return (true); >+ } > return (false); >+ } > tsc_freq = (uint64_t)regs[2] * regs[1] / regs[0]; > return (true); > }
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