On 29/04/18 11:11, Minjun Hong wrote: > Hi. > I'm looking for a point where address translation (guest virtual > address to machine address) occurs in Xen. > Of course, I mean when TLB miss has occured.
This question makes me wonder whether you are more familiar with PowerPC than x86. In x86, the TLB is automatically maintained by hardware, and new entries will be populated as necessary. All pagetable related errors result in a pagefault exception, which Xen handles. > I'm using a PV guest and I've found 'guest_walk_tables()' function in > "xen/arch/x86/mm/guest_walk.c". > However, in the comment of the function, it says "Walk the guest > pagetables, after the manner of a hardware walker". > I'm confused because I'm not sure if the function is called after the > 'hardware page table walker'. "after the manner" is an uncommon phrase in English, which AFAICT derives from Latin originally. It means "in the style of", "in the same way as", etc. guest_walk_tables() is a function which tries to match the behaviour of the hardware pagewalker. However, it is only used for cases where we can't use regular hardware support, such as emulation of instructions. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
