Re: [Xen-devel] [PATCH v3] x86/HVM: make hvm_efer_valid() honor guest features

2015-01-15 Thread Andrew Cooper
On 15/01/15 15:24, Jan Beulich wrote: > Following the earlier similar change validating CR4 modifications. > > Note that this requires a non-obvious adjustment to hvm_cpuid(): On > 32-bit hosts/tool stacks, the SYSCALL feature flag will be seen clear > on Intel CPUs, yet 64-bit guests legitimately

[Xen-devel] [PATCH v3] x86/HVM: make hvm_efer_valid() honor guest features

2015-01-15 Thread Jan Beulich
Following the earlier similar change validating CR4 modifications. Note that this requires a non-obvious adjustment to hvm_cpuid(): On 32-bit hosts/tool stacks, the SYSCALL feature flag will be seen clear on Intel CPUs, yet 64-bit guests legitimately expect the feature for be available. Mimic hard