Re: [Xen-devel] [PATCH SpectreV1+L1TF v5 2/9] x86/vioapic: block speculative out-of-bound accesses

2019-02-01 Thread Norbert Manthey
On 1/31/19 17:05, Jan Beulich wrote: On 29.01.19 at 15:43, wrote: >> When interacting with io apic, a guest can specify values that are used >> as index to structures, and whose values are not compared against >> upper bounds to prevent speculative out-of-bound accesses. This change >> preven

Re: [Xen-devel] [PATCH SpectreV1+L1TF v5 2/9] x86/vioapic: block speculative out-of-bound accesses

2019-01-31 Thread Jan Beulich
>>> On 29.01.19 at 15:43, wrote: > When interacting with io apic, a guest can specify values that are used > as index to structures, and whose values are not compared against > upper bounds to prevent speculative out-of-bound accesses. This change > prevents these speculative accesses. > > Furthe

[Xen-devel] [PATCH SpectreV1+L1TF v5 2/9] x86/vioapic: block speculative out-of-bound accesses

2019-01-29 Thread Norbert Manthey
When interacting with io apic, a guest can specify values that are used as index to structures, and whose values are not compared against upper bounds to prevent speculative out-of-bound accesses. This change prevents these speculative accesses. Furthermore, two variables are initialized and the c