[xen staging-4.14] x86/cpuid: Infrastructure for leaf 7:1.ebx

[patchbot@xxxxxxx]

commit 08ec8c11d653c40f8ea9c7e9740b0718de01a3f7
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jan 27 12:54:42 2022 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Feb 8 18:06:41 2022 +0000

    x86/cpuid: Infrastructure for leaf 7:1.ebx
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    (cherry picked from commit e1828e3032ebfe036023cd733adfd2d4ec856688)
---
 tools/misc/xen-cpuid.c                      | 5 +++++
 xen/arch/x86/cpu/common.c                   | 3 ++-
 xen/include/public/arch-x86/cpufeatureset.h | 2 ++
 xen/include/xen/lib/x86/cpuid.h             | 7 +++++++
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/tools/misc/xen-cpuid.c b/tools/misc/xen-cpuid.c
index bfe20c0c5f..0b91dff2e3 100644
--- a/tools/misc/xen-cpuid.c
+++ b/tools/misc/xen-cpuid.c
@@ -188,6 +188,10 @@ static const char *const str_e21a[32] =
     [ 2] = "lfence+",
 };
 
+static const char *const str_7b1[32] =
+{
+};
+
 static const struct {
     const char *name;
     const char *abbr;
@@ -206,6 +210,7 @@ static const struct {
     { "0x00000007:0.edx", "7d0", str_7d0 },
     { "0x00000007:1.eax", "7a1", str_7a1 },
     { "0x80000021.eax",  "e21a", str_e21a },
+    { "0x00000007:1.ebx", "7b1", str_7b1 },
 };
 
 #define COL_ALIGN "18"
diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
index 5b1f38c8bf..f1d5661b8b 100644
--- a/xen/arch/x86/cpu/common.c
+++ b/xen/arch/x86/cpu/common.c
@@ -432,7 +432,8 @@ static void generic_identify(struct cpuinfo_x86 *c)
                if (max_subleaf >= 1)
                        cpuid_count(7, 1,
                                    &c->x86_capability[FEATURESET_7a1],
-                                   &tmp, &tmp, &tmp);
+                                   &c->x86_capability[FEATURESET_7b1],
+                                   &tmp, &tmp);
        }
 
        if (c->cpuid_level >= 0xd)
diff --git a/xen/include/public/arch-x86/cpufeatureset.h 
b/xen/include/public/arch-x86/cpufeatureset.h
index ceac28b0d1..01a30491e4 100644
--- a/xen/include/public/arch-x86/cpufeatureset.h
+++ b/xen/include/public/arch-x86/cpufeatureset.h
@@ -288,6 +288,8 @@ XEN_CPUFEATURE(AVX512_BF16,  10*32+ 5) /*A  AVX512 BFloat16 
Instructions */
 /* AMD-defined CPU features, CPUID level 0x80000021.eax, word 11 */
 XEN_CPUFEATURE(LFENCE_DISPATCH,    11*32+ 2) /*A  LFENCE always serializing */
 
+/* Intel-defined CPU features, CPUID level 0x00000007:1.ebx, word 12 */
+
 #endif /* XEN_CPUFEATURE */
 
 /* Clean up from a default include.  Close the enum (for C). */
diff --git a/xen/include/xen/lib/x86/cpuid.h b/xen/include/xen/lib/x86/cpuid.h
index a4d254ea96..e87036b303 100644
--- a/xen/include/xen/lib/x86/cpuid.h
+++ b/xen/include/xen/lib/x86/cpuid.h
@@ -16,6 +16,7 @@
 #define FEATURESET_7d0    9 /* 0x00000007:0.edx    */
 #define FEATURESET_7a1   10 /* 0x00000007:1.eax    */
 #define FEATURESET_e21a  11 /* 0x80000021.eax      */
+#define FEATURESET_7b1   12 /* 0x00000007:1.ebx    */
 
 struct cpuid_leaf
 {
@@ -188,6 +189,10 @@ struct cpuid_policy
                 uint32_t _7a1;
                 struct { DECL_BITFIELD(7a1); };
             };
+            union {
+                uint32_t _7b1;
+                struct { DECL_BITFIELD(7b1); };
+            };
         };
     } feat;
 
@@ -327,6 +332,7 @@ static inline void cpuid_policy_to_featureset(
     fs[FEATURESET_7d0] = p->feat._7d0;
     fs[FEATURESET_7a1] = p->feat._7a1;
     fs[FEATURESET_e21a] = p->extd.e21a;
+    fs[FEATURESET_7b1] = p->feat._7b1;
 }
 
 /* Fill in a CPUID policy from a featureset bitmap. */
@@ -345,6 +351,7 @@ static inline void cpuid_featureset_to_policy(
     p->feat._7d0  = fs[FEATURESET_7d0];
     p->feat._7a1  = fs[FEATURESET_7a1];
     p->extd.e21a  = fs[FEATURESET_e21a];
+    p->feat._7b1  = fs[FEATURESET_7b1];
 }
 
 static inline uint64_t cpuid_policy_xcr0_max(const struct cpuid_policy *p)
--
generated by git-patchbot for /home/xen/git/xen.git#staging-4.14