x86/spec-ctrl: Update hardware hints

* Rename IBRS_ALL to EIBRS.  EIBRS is the term that everyone knows, and this
   makes ARCH_CAPS_EIBRS match the X86_FEATURE_EIBRS form.
 * Print RRSBA too, which is also a hint about behaviour.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
(cherry picked from commit 94200e1bae)

xen/arch/x86/include/asm/msr-index.h

@@ -66,7 +66,7 @@
 
 #define MSR_ARCH_CAPABILITIES               0x0000010a
 #define  ARCH_CAPS_RDCL_NO                  (_AC(1, ULL) <<  0)
-#define  ARCH_CAPS_IBRS_ALL                 (_AC(1, ULL) <<  1)
+#define  ARCH_CAPS_EIBRS                    (_AC(1, ULL) <<  1)
 #define  ARCH_CAPS_RSBA                     (_AC(1, ULL) <<  2)
 #define  ARCH_CAPS_SKIP_L1DFL               (_AC(1, ULL) <<  3)
 #define  ARCH_CAPS_SSB_NO                   (_AC(1, ULL) <<  4)

xen/arch/x86/spec_ctrl.c

@@ -421,10 +421,11 @@ static void __init print_details(enum ind_thunk thunk)
      * Hardware read-only information, stating immunity to certain issues, or
      * suggestions of which mitigation to use.
      */
-    printk("  Hardware hints:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+    printk("  Hardware hints:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
            (caps & ARCH_CAPS_RDCL_NO)                        ? " RDCL_NO"        : "",
-           (caps & ARCH_CAPS_IBRS_ALL)                       ? " IBRS_ALL"       : "",
+           (caps & ARCH_CAPS_EIBRS)                          ? " EIBRS"          : "",
            (caps & ARCH_CAPS_RSBA)                           ? " RSBA"           : "",
+           (caps & ARCH_CAPS_RRSBA)                          ? " RRSBA"          : "",
            (caps & ARCH_CAPS_SKIP_L1DFL)                     ? " SKIP_L1DFL"     : "",
            (e8b  & cpufeat_mask(X86_FEATURE_SSB_NO)) ||
            (caps & ARCH_CAPS_SSB_NO)                         ? " SSB_NO"         : "",