x86/mm: Create asm/invpcid.h

Unclutter tlbflush.h a little.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/include/asm/invpcid.h b/arch/x86/include/asm/invpcid.h
new file mode 100644 (file)
index 0000000..989cfa8
--- /dev/null
+++ b/arch/x86/include/asm/invpcid.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_INVPCID
+#define _ASM_X86_INVPCID
+
+static inline void __invpcid(unsigned long pcid, unsigned long addr,
+                            unsigned long type)
+{
+       struct { u64 d[2]; } desc = { { pcid, addr } };
+
+       /*
+        * The memory clobber is because the whole point is to invalidate
+        * stale TLB entries and, especially if we're flushing global
+        * mappings, we don't want the compiler to reorder any subsequent
+        * memory accesses before the TLB flush.
+        *
+        * The hex opcode is invpcid (%ecx), %eax in 32-bit mode and
+        * invpcid (%rcx), %rax in long mode.
+        */
+       asm volatile (".byte 0x66, 0x0f, 0x38, 0x82, 0x01"
+                     : : "m" (desc), "a" (type), "c" (&desc) : "memory");
+}
+
+#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
+
+/* 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 except globals. */
+static inline void invpcid_flush_all_nonglobals(void)
+{
+       __invpcid(0, 0, INVPCID_TYPE_ALL_NON_GLOBAL);
+}
+
+#endif /* _ASM_X86_INVPCID */

diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 8b27daf..171b429 100644 (file)
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -9,54 +9,7 @@
 #include <asm/cpufeature.h>
 #include <asm/special_insns.h>
 #include <asm/smp.h>
-
-static inline void __invpcid(unsigned long pcid, unsigned long addr,
-                            unsigned long type)
-{
-       struct { u64 d[2]; } desc = { { pcid, addr } };
-
-       /*
-        * The memory clobber is because the whole point is to invalidate
-        * stale TLB entries and, especially if we're flushing global
-        * mappings, we don't want the compiler to reorder any subsequent
-        * memory accesses before the TLB flush.
-        *
-        * The hex opcode is invpcid (%ecx), %eax in 32-bit mode and
-        * invpcid (%rcx), %rax in long mode.
-        */
-       asm volatile (".byte 0x66, 0x0f, 0x38, 0x82, 0x01"
-                     : : "m" (desc), "a" (type), "c" (&desc) : "memory");
-}
-
-#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
-
-/* 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 except globals. */
-static inline void invpcid_flush_all_nonglobals(void)
-{
-       __invpcid(0, 0, INVPCID_TYPE_ALL_NON_GLOBAL);
-}
+#include <asm/invpcid.h>
 
 static inline u64 inc_mm_tlb_gen(struct mm_struct *mm)
 {