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Anthony Liguori wrote: > Since a hypercall may span two pages and is a gva, we need a function to write > to a gva that may span multiple pages. emulator_write_phys() seems like the > logical choice for this. > > @@ -962,8 +962,35 @@ static int emulator_write_std(unsigned long addr, > unsigned int bytes, > struct kvm_vcpu *vcpu I think that emulator_write_emulated(), except for being awkwardly named, should do the job. We have enough APIs. But! We may not overwrite the hypercall instruction while a vcpu may be executing, since there's no atomicity guarantee for code fetch. We have to to be out of guest mode while writing that insn. -- Any sufficiently difficult bug is indistinguishable from a feature. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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