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Date: Wed, 20 Jun 2007 10:47:24 +0300 From: Avi Kivity <avi@...ranet.com> To: Luca Tettamanti <kronos.it@...il.com> CC: kvm-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] kvm: Fix x86 emulator writeback Luca Tettamanti wrote: > When the old value and new one are the same the emulator skips the > write; this is undesiderable when the destination is a MMIO area and the > write shall be performed regardless of the previous value. This > optimization breaks e.g. a Linux guest APIC compiled without > X86_GOOD_APIC. > > Remove the check and perform the writeback stage in the emulation unless > it's explicitly disabled (currently push and some 2 bytes instructions > may disable the writeback). > > Applied both, thanks. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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