Messages in this thread | | | From | "Yu, Fenghua" <> | Date | Wed, 17 Aug 2011 14:38:30 -0700 | Subject | RE: [PATCH v4 1/2] x86: Enable fast strings on Intel if BIOS hasn't already |
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> -----Original Message----- > From: Andy Lutomirski [mailto:luto@MIT.EDU] > Sent: Wednesday, August 17, 2011 7:03 AM > To: x86@kernel.org; linux-kernel@vger.kernel.org > Cc: Yu, Fenghua; Matthew Garrett; Len Brown; linux- > acpi@vger.kernel.org; Ingo Molnar; Andy Lutomirski > Subject: [PATCH v4 1/2] x86: Enable fast strings on Intel if BIOS > hasn't already > > Intel SDM volume 3A, 8.4.2 says: > > Software can disable fast-string operation by clearing the > fast-string-enable bit (bit 0) of IA32_MISC_ENABLE MSR. > However, Intel recomments that system software always enable > fast-string operation. > > The Intel DQ67SW board (with latest BIOS) disables fast string > operations if TXT is enabled. A Lenovo X220 disables it regardless > of TXT setting. I doubt I'm the only person with a dumb BIOS like > this. > > Signed-off-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
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