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SPU/SYSINFO: Disable TSX by default for TSX-FA cpus (#11105)

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- Also detect the new RTM_ALWAYS_ABORT bit in cpuid
- This new bit indicates that RTM is disabled in the microcode
- On cpus with RTM_ALWAYS_ABORT TSX can be renabled by writing 0x4 to the msr 0x0000010F
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Whatcookie 2021-11-04 12:44:25 -04:00 • committed by GitHub
parent 1a0392bf15
commit bf6044fced
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3 changed files with 15 additions and 3 deletions
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12
rpcs3/util/sysinfo.cpp
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@ -82,6 +82,12 @@ bool utils::has_tsx_force_abort()
return g_value;
}
bool utils::has_rtm_always_abort()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[3] & 0x800) == 0x800;
return g_value;
}
bool utils::has_mpx()
{
static const bool g_value = get_cpuid(0, 0)[0] >= 0x7 && (get_cpuid(7, 0)[1] & 0x4000) == 0x4000;
@ -230,11 +236,15 @@ std::string utils::get_system_info()
result += "-FA";
}
if (!has_mpx())
if (!has_mpx() || has_tsx_force_abort())
{
result += " disabled by default";
}
}
else if (has_rtm_always_abort())
{
result += " | TSX disabled via microcode";
}
return result;
}