Re: [Xen-devel] [PATCH for-4.12 v4 2/3] x86/svm: Drop enum instruction_index and simplify svm_get_insn_len()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 31.01.19 at 19:24, <andrew.cooper3@xxxxxxxxxx> wrote:
> Passing a 32-bit integer index into an array with entries containing less 
> than
> 32 bits of data is wasteful, and creates an unnecessary error condition of
> passing an out-of-range index.
> 
> The width of the X86EMUL_OPC() encoding is currently 20 bits for the
> instructions used, which leaves room for a modrm byte.  Drop opc_tab[]
> entirely, and encode the expected opcode/modrm information directly.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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