Date: Sat, 17 May 2008 13:12:43 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-hackers@freebsd.org Subject: Re: rdmsr from userspace Message-ID: <20080517101243.GH18958@deviant.kiev.zoral.com.ua> In-Reply-To: <482E93C0.4070802@icyb.net.ua>
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[-- Attachment #1 --] On Sat, May 17, 2008 at 11:13:52AM +0300, Andriy Gapon wrote: > > It seems that rdmsr instruction can be executed only at the highest > privilege level and thus is not permitted from userland. Maybe we should > provide something like Linux /dev/cpu/msr? > I don't like interface of that device, I think that ioctl approach would > be preferable in this case. > Something like create /dev/cpuN and allow some ioctls on it: > ioctl(cpu_fd, CPU_RDMSR, arg). > What do you think? I believe ports/sysutils/devcpu is what you need. In fact, I think this ought to be committed to the base. I do not know why Stas did not asked for this, at least at public. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkgur5sACgkQC3+MBN1Mb4hURQCfcnilZbpQqqMmy1xQsPSoZoqA 8qEAoK1OxSCTxAGZ53Jebag6x1Im1S7q =Lcx4 -----END PGP SIGNATURE-----home | help
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