From: Wei Liu <wei.liu2@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: Juergen Gross <jgross@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Wei Liu <wei.liu2@citrix.com>, Jan Beulich <JBeulich@suse.com>
Subject: [PATCH RFC 3/4] x86: add invpcid.h
Date: Thu, 15 Feb 2018 12:10:39 +0000 [thread overview]
Message-ID: <20180215121040.20585-4-wei.liu2@citrix.com> (raw)
In-Reply-To: <20180215121040.20585-1-wei.liu2@citrix.com>
Provide the functions needed for different modes.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
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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next prev parent reply other threads:[~2018-02-15 12:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-15 12:10 [PATCH RFC 0/4] Use INVPCID to flush global mappings Wei Liu
2018-02-15 12:10 ` [PATCH RFC 1/4] x86: introduce cpu_has_invpcid Wei Liu
2018-02-15 12:31 ` Jan Beulich
2018-02-15 12:10 ` [PATCH RFC 2/4] x86: report if PCID and INVPCID are supported Wei Liu
2018-02-15 12:10 ` Wei Liu [this message]
2018-02-15 12:15 ` [PATCH RFC 3/4] x86: add invpcid.h Andrew Cooper
2018-02-15 12:24 ` Wei Liu
2018-02-15 12:26 ` Andrew Cooper
2018-02-15 12:34 ` Jan Beulich
2018-02-15 12:35 ` Wei Liu
2018-02-15 13:23 ` Jan Beulich
2018-02-15 12:10 ` [PATCH RFC 4/4] x86: use invpcid to do global flush Wei Liu
2018-02-15 15:38 ` [PATCH RFC 0/4] Use INVPCID to flush global mappings Juergen Gross
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