[Xen-devel] [PATCH RFC 3/4] x86: add invpcid.h

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Provide the functions needed for different modes.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/include/asm-x86/invpcid.h | 61 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 xen/include/asm-x86/invpcid.h

diff --git a/xen/include/asm-x86/invpcid.h b/xen/include/asm-x86/invpcid.h
new file mode 100644
index 0000000000..7c307ecfc3
--- /dev/null
+++ b/xen/include/asm-x86/invpcid.h
@@ -0,0 +1,61 @@
+#ifndef _ASM_X86_INVPCID_H_
+#define _ASM_X86_INVPCID_H_
+
+#include <xen/types.h>
+
+#define INVPCID_TYPE_INDIV_ADDR      0
+#define INVPCID_TYPE_SINGLE_CTXT     1
+#define INVPCID_TYPE_ALL_INCL_GLOBAL 2
+#define INVPCID_TYPE_ALL_NON_GLOBAL  3
+
+struct invpcid_desc {
+    uint64_t pcid:12;
+    uint64_t reserved:52;
+    uint64_t addr;
+};
+
+static inline void invpcid(unsigned long pcid, unsigned long addr,
+                           unsigned long type)
+{
+    struct invpcid_desc desc = { .pcid = pcid, .addr = addr };
+
+    asm volatile ("invpcid (%0), %1"
+                  : : "r" (&desc), "r" (type) : "memory" );
+}
+
+/* Flush all mappings for a given PCID and addr, not including globals */
+static inline void invpcid_flush_one(unsigned long pcid,
+                                     unsigned long addr)
+{
+    invpcid(pcid, addr, INVPCID_TYPE_INDIV_ADDR);
+}
+
+/* Flush all mappings for a given PCID, not including globals */
+static inline void invpcid_flush_single_context(unsigned long pcid)
+{
+    invpcid(pcid, 0, INVPCID_TYPE_SINGLE_CTXT);
+}
+
+/* Flush all mappings, including globals, for all PCIDs */
+static inline void invpcid_flush_all(void)
+{
+    invpcid(0, 0, INVPCID_TYPE_ALL_INCL_GLOBAL);
+}
+
+/* Flush all mappings for all PCIDs, excluding globals */
+static inline void invpcid_flush_all_nonglobals(void)
+{
+    invpcid(0, 0, INVPCID_TYPE_ALL_NON_GLOBAL);
+}
+
+#endif /* _ASM_X86_INVPCID_H_ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.11.0


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