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Subject[PATCH 0/3] xen/pv: sanitize xen pv guest msr accesses
Date
Historically when running as Xen PV guest all MSR accesses have been
silently swallowing any GP faults, even when the kernel was using not
the *msr_safe() access functions.

Change that by making the behavior controllable via kernel config and
via a boot parameter.

This will help finding paths where MSRs are being accessed under Xen
which are not emulated by the hypervisor.

Juergen Gross (3):
xen/pv: allow pmu msr accesses to cause GP
xen/pv: refactor msr access functions to support safe and unsafe
accesses
xen/pv: support selecting safe/unsafe msr accesses

.../admin-guide/kernel-parameters.txt | 6 ++
arch/x86/xen/Kconfig | 9 ++
arch/x86/xen/enlighten_pv.c | 97 +++++++++++++------
arch/x86/xen/pmu.c | 44 +++++----
4 files changed, 110 insertions(+), 46 deletions(-)

--
2.35.3

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