[Xen-devel] [PATCH] tools/libxc: Add xstate cpuid leaf of avx512

[Luwei Kang <luwei.kang@xxxxxxxxx>]

Enable get xstate cpuid leaf information regarding avx512 in guest.

Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>
---
 tools/libxc/xc_cpuid_x86.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index de06b32..d761805 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -406,6 +406,9 @@ static void intel_xc_cpuid_policy(xc_interface *xch,
 #define X86_XCR0_AVX    (1ULL <<  2)
 #define X86_XCR0_BNDREG (1ULL <<  3)
 #define X86_XCR0_BNDCSR (1ULL <<  4)
+#define X86_XCR0_OPMASK (1ULL <<  5)
+#define X86_XCR0_ZMM    (1ULL <<  6)
+#define X86_XCR0_HI_ZMM (1ULL <<  7)
 #define X86_XCR0_PKRU   (1ULL <<  9)
 #define X86_XCR0_LWP    (1ULL << 62)
 
@@ -437,6 +440,9 @@ static void xc_cpuid_config_xsave(xc_interface *xch,
     if ( test_bit(X86_FEATURE_MPX, info->featureset) )
         guest_xfeature_mask |= X86_XCR0_BNDREG | X86_XCR0_BNDCSR;
 
+    if ( test_bit(X86_FEATURE_AVX512F, info->featureset) )
+        guest_xfeature_mask |= X86_XCR0_OPMASK | X86_XCR0_ZMM | 
X86_XCR0_HI_ZMM;
+
     if ( test_bit(X86_FEATURE_PKU, info->featureset) )
         guest_xfeature_mask |= X86_XCR0_PKRU;
 
-- 
2.7.4


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