From: Fenghua Yu <fenghua.yu@intel.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>, "H Peter Anvin" <hpa@zytor.com>,
"Ravi V Shankar" <ravi.v.shankar@intel.com>,
"Ashok Raj" <ashok.raj@intel.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
"Fenghua Yu" <fenghua.yu@intel.com>
Subject: [PATCH 0/2] x86: Enumerate direct stores instructions
Date: Wed, 24 Oct 2018 14:57:15 -0700 [thread overview]
Message-ID: <1540418237-125817-1-git-send-email-fenghua.yu@intel.com> (raw)
Direct stores instructionis MOVDIRI and MOVDIR64B will be available in
Tremont and other future x86 processors.
This patch set enumerates the instructions through CPUID.
GCC 8 implements intrinsics for the direct stores instructions.
User can try these instructions from GCC tree:
https://gcc.gnu.org/git/?p=gcc.git;a=summary
Before running the instructions, user needs to check availability of
the features by CPUID, or /proc/cpuinfo, etc.
Detailed information on the instructions and the MSR can be found in
the latest Intel Architecture Instruction Set Extensions and Future
Features Programming Reference at
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf
Please note: this patch set was sent out with umonitor/umwait/tpause
instructions patches before. But since we find the other patches are not
fully ready yet, this time these direct stores instructions patches are
sent out separately.
Fenghua Yu (2):
x86/cpufeatures: Enumerate MOVDIRI instruction
x86/cpufeatures: Enumerate MOVDIR64B instruction
arch/x86/include/asm/cpufeatures.h | 2 ++
1 file changed, 2 insertions(+)
--
2.5.0
next reply other threads:[~2018-10-24 22:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-24 21:57 Fenghua Yu [this message]
2018-10-24 21:57 ` [PATCH 1/2] x86/cpufeatures: Enumerate MOVDIRI instruction Fenghua Yu
2018-10-25 5:45 ` [tip:x86/urgent] " tip-bot for Fenghua Yu
2018-10-24 21:57 ` [PATCH 2/2] x86/cpufeatures: Enumerate MOVDIR64B instruction Fenghua Yu
2018-10-25 5:46 ` [tip:x86/urgent] " tip-bot for Fenghua Yu
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