Re: [PATCH v2 4/5] x86/msr: Add definitions for new speculation control MSRs

Dave Hansen
2018-01-23T18:27:24Z

On 01/23/2018 08:52 AM, David Woodhouse wrote:
> +#define MSR_IA32_ARCH_CAPABILITIES 0x0000010a
> +#define ARCH_CAP_RDCL_NO (1 << 0) /* Not susceptible to Meltdown */
> +#define ARCH_CAP_IBRS_ALL (1 << 1) /* Enhanced IBRS support */

Do we want to spell out the silly Intel acronym? I don't know how we
fit it on the right side, but I do think we need to do it _somewhere_.
We need the code to stand on its own to some degree and not subject the
masses to reading the spec to understand the code.

/* Not to susceptible Rogue Data Cache Load aka Meltdown: */
#define ARCH_CAP_RDCL_NO (1 << 0)