On 04/11/2022 14:43, Roger Pau Monne wrote: > This reverts commit adb715db698bc8ec3b88c24eb88b21e9da5b6c07. > > The dumping of stacks for HVM guests is problematic, since it requires > taking the p2m lock in order to walk the guest page tables and the > p2m. > > The suggested solution to the issue is to introduce and use a lockless > p2m walker, that relies on being executed with interrupts disabled in > order to prevent any p2m pages from being freed while doing the > walk. > > Note that modifications of p2m entries are already done atomically in > order to prevent the hardware walker from seeing partially updated > values. > > Signed-off-by: Roger Pau Monné <[email protected]>
Acked-by: Andrew Cooper <[email protected]>, as agreed on the x86 maintainers call. ~Andrew
