From: Borislav Petkov <bp@alien8.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>, Ingo Molnar <mingo@kernel.org>,
linux-tip-commits@vger.kernel.org, vincent.weaver@maine.edu,
eranian@google.com, efault@gmx.de, peterz@infradead.org,
jolsa@redhat.com, torvalds@linux-foundation.org,
tglx@linutronix.de, rostedt@goodmis.org, acme@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [tip:perf/core] x86, tracing, perf: Add trace point for MSR accesses
Date: Fri, 4 Dec 2015 23:48:37 +0100 [thread overview]
Message-ID: <20151204224837.GU21177@pd.tnic> (raw)
In-Reply-To: <F6B0FA94-D7B5-43B1-AD38-A6212B5E58DA@zytor.com>
On Fri, Dec 04, 2015 at 02:35:38PM -0800, H. Peter Anvin wrote:
> How about this: it is easy too easy to hard code MSR accesses, and the
> last things we need is alien non-GPL drivers doing their own low-level
> hacks bypassing these facilities.
Yeah, that doesn't stop alien, non-GPL drivers from doing
asm("rdmsr ..)
Hell, they can even do naked byte opcodes " ...0f 32... "
But I see your point, thanks!
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2015-12-04 22:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 1:00 [PATCH 1/4] x86: Don't include asm/processor.h into asm/atomic.h Andi Kleen
2015-12-02 1:00 ` [PATCH 2/4] tracepoints: Move struct tracepoint to new tracepoint-defs.h header Andi Kleen
2015-12-02 1:56 ` Steven Rostedt
2015-12-04 11:59 ` [tip:perf/core] " tip-bot for Andi Kleen
2015-12-06 13:18 ` tip-bot for Andi Kleen
2015-12-02 1:00 ` [PATCH 3/4] x86: Add trace point for MSR accesses Andi Kleen
2015-12-02 2:03 ` Steven Rostedt
2015-12-04 11:59 ` [tip:perf/core] x86, tracing, perf: " tip-bot for Andi Kleen
2015-12-04 12:11 ` Borislav Petkov
2015-12-04 18:28 ` Andi Kleen
2015-12-04 18:30 ` Borislav Petkov
2015-12-04 22:18 ` Andi Kleen
2015-12-04 22:27 ` Borislav Petkov
2015-12-04 22:35 ` H. Peter Anvin
2015-12-04 22:48 ` Borislav Petkov [this message]
2015-12-04 22:57 ` H. Peter Anvin
2015-12-06 13:19 ` tip-bot for Andi Kleen
2015-12-02 1:01 ` [PATCH 4/4] perf, x86: Remove old MSR perf tracing code Andi Kleen
2015-12-04 12:00 ` [tip:perf/core] perf/x86: " tip-bot for Andi Kleen
2015-12-06 13:19 ` tip-bot for Andi Kleen
2015-12-04 11:58 ` [tip:perf/core] x86/headers: Don't include asm/processor.h in asm /atomic.h tip-bot for Andi Kleen
2015-12-06 13:18 ` tip-bot for Andi Kleen
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