linux-kernel - Re: [PATCH] perf/x86/intel/pt: Don't die on VMXON

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20160406115516.GE12070@pd.tnic>
Date:	Wed, 6 Apr 2016 13:55:16 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Gleb Natapov <gleb@...nel.org>,
	Paolo Bonzini <pbonzini@...hat.com>, x86@...nel.org,
	kvm@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, hpa@...or.com,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH] perf/x86/intel/pt: Don't die on VMXON

On Wed, Apr 06, 2016 at 01:52:15PM +0200, Peter Zijlstra wrote:
> Borislav tells me this ought to be boot_cpu_has(X86_FEATURE_VMX)
> 
> > +		/* Intel SDM, 36.5 "Tracing post-VMXON" */
> > +		rdmsrl(MSR_IA32_VMX_MISC, reg);
> > +		if (reg & BIT(14))

Also, I needz to consult my crystal ball about what bit 14 is...

:-)

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.