On 23/01/2023 10:47 am, Jan Beulich wrote: > On 23.01.2023 11:43, Andrew Cooper wrote: >> On 23/01/2023 8:12 am, Jan Beulich wrote: >>> While the table is used only when HVM=y, the table entry of course needs >>> to be properly populated when also PV32=y. Fully removing the table >>> entry we therefore wrong. >>> >>> Fixes: 1894049fa283 ("x86/shadow: L2H shadow type is PV32-only") >>> Signed-off-by: Jan Beulich <jbeul...@suse.com> >> Erm, why? >> >> The safety justification for the original patch was that this is HVM >> only code. And it really is HVM only code - it's genuinely compiled out >> for !HVM builds. > Right, and we have logic taking care of the !HVM case. But that same > logic uses this "HVM-only" table when HVM=y also for all PV types.
Ok - this is what needs fixing then. This is a layering violation which has successfully tricked you into making a buggy patch. I'm unwilling to bet this will be the final time either... "this file is HVM-only, therefore no PV paths enter it" is a reasonable expectation, and should be true. ~Andrew