On 2/4/2019 11:04 AM, Borislav Petkov wrote:
On Mon, Feb 04, 2019 at 10:57:32AM -0500, Liang, Kan wrote:
On 2/4/2019 10:44 AM, Peter Zijlstra wrote:
On Mon, Feb 04, 2019 at 04:38:27PM +0100, Peter Zijlstra wrote:
+static const struct x86_cpu_desc isolation_ucodes[] = {
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_MOBILE, 9, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_MOBILE, 10, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_MOBILE, 11, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_MOBILE, 12, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_DESKTOP, 10, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_DESKTOP, 11, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_DESKTOP, 12, 0x0000004e),
+ INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE_DESKTOP, 13, 0x0000004e),
Do we want a special stepping (0 / -1) to be able to denote 'all' ?
Something like as below?
#define X86_STEPPING_ANY 0xff
As my understanding, the microcode version for each stepping is independent
and irrelevant.
Huh?
Why are we looking at the stepping then?
x86_match_cpu_with_stepping() <---
I mean that the microcode version number is irrelevant between stepping.
Let's use SKL server as an example.
+ INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 3, 0x00000021),
+ INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 4, 0x00000000),
We need the function to check the min microcode version number for each
stepping.
Thanks,
Kan
