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| author | Aaron Lewis <aaronlewis@google.com> | 2019-06-06 00:02:52 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-06-14 12:26:22 +0200 |
| commit | cbb99c0f588737ec98c333558922ce47e9a95827 (patch) | |
| tree | 9affed71487e06dab9f9231b6c5086002dfe0c75 /fs | |
| parent | perf/x86: Add Intel Ice Lake NNPI uncore support (diff) | |
| download | linux-cbb99c0f588737ec98c333558922ce47e9a95827.tar.xz linux-cbb99c0f588737ec98c333558922ce47e9a95827.zip | |
x86/cpufeatures: Add FDP_EXCPTN_ONLY and ZERO_FCS_FDS
Add the CPUID enumeration for Intel's de-feature bits to accommodate
passing these de-features through to kvm guests.
These de-features are (from SDM vol 1, section 8.1.8):
- X86_FEATURE_FDP_EXCPTN_ONLY: If CPUID.(EAX=07H,ECX=0H):EBX[bit 6] = 1, the
data pointer (FDP) is updated only for the x87 non-control instructions that
incur unmasked x87 exceptions.
- X86_FEATURE_ZERO_FCS_FDS: If CPUID.(EAX=07H,ECX=0H):EBX[bit 13] = 1, the
processor deprecates FCS and FDS; it saves each as 0000H.
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jim Mattson <jmattson@google.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: marcorr@google.com
Cc: Peter Feiner <pfeiner@google.com>
Cc: pshier@google.com
Cc: Robert Hoo <robert.hu@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Lendacky <Thomas.Lendacky@amd.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190605220252.103406-1-aaronlewis@google.com
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions