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-rw-r--r--sys/amd64/include/specialreg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/amd64/include/specialreg.h b/sys/amd64/include/specialreg.h
index 4af4594..4fb92cb 100644
--- a/sys/amd64/include/specialreg.h
+++ b/sys/amd64/include/specialreg.h
@@ -126,6 +126,7 @@
#define CPUID2_CX16 0x00002000
#define CPUID2_XTPR 0x00004000
#define CPUID2_PDCM 0x00008000
+#define CPUID2_PCID 0x00020000
#define CPUID2_DCA 0x00040000
#define CPUID2_SSE41 0x00080000
#define CPUID2_SSE42 0x00100000
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