Add macro cpu_has_cx16 to detect X86_FEATURE_CX16 feature.
CC: Keir Fraser <k...@xen.org>
CC: Jan Beulich <jbeul...@suse.com>
CC: Andrew Cooper <andrew.coop...@citrix.com>
CC: Kevin Tian <kevin.t...@intel.com>
Signed-off-by: Feng Wu <feng...@intel.com>
Reviewed-by: Kevin Tian <kevin.t...@intel.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
---
v4:
- no changes
v3:
- Newly added. We need to atomically update the IRTE in PI format
via CMPXCHG16B which is only available with this feature.
xen/include/asm-x86/cpufeature.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/xen/include/asm-x86/cpufeature.h b/xen/include/asm-x86/cpufeature.h
index 7963a3a..63c1fe8 100644
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -216,6 +216,8 @@
#define cpu_has_cpuid_faulting boot_cpu_has(X86_FEATURE_CPUID_FAULTING)
+#define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16)
+
enum _cache_type {
CACHE_TYPE_NULL = 0,
CACHE_TYPE_DATA = 1,
--
2.1.0
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