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Michał Leszczyński
71cb03f03c
Add CPUID/MSR enumeration details for Processor Trace. For now, we will only support its use inside VMX operation. Fill in the vmtrace_available boolean to activate the newly introduced common infrastructure for allocating trace buffers. For now, Processor Trace is going to be operated in Single Output mode behind the guests back. Add the MSRs to struct vcpu_msrs, and set up the buffer limit in vmx_init_ipt() as it is fixed for the lifetime of the domain. Context switch the most of the MSRs in and out of vCPU context, but the main control register needs to reside in the MSR load/save lists. Explicitly pull the msrs pointer out into a local variable, because the optimiser cannot keep it live across the memory clobbers in the MSR accesses. Signed-off-by: Michał Leszczyński <michal.leszczynski@cert.pl> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Release-Acked-by: Ian Jackson <iwj@xenproject.org>