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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC, PATCH 18/24] i386 Vmi tlbflush header
Again, more simple code movement. Move page invalidations and local
and global flushes to the sub-arch layer. Note global here does not
mean SMP, but the global bit of the page table entry.
Signed-off-by: Zachary Amsden <zach@xxxxxxxxxx>
Index: linux-2.6.16-rc5/include/asm-i386/tlbflush.h
===================================================================
--- linux-2.6.16-rc5.orig/include/asm-i386/tlbflush.h 2006-03-10
12:55:06.000000000 -0800
+++ linux-2.6.16-rc5/include/asm-i386/tlbflush.h 2006-03-10
13:03:38.000000000 -0800
@@ -4,38 +4,7 @@
#include <linux/config.h>
#include <linux/mm.h>
#include <asm/processor.h>
-
-#define __flush_tlb() \
- do { \
- unsigned int tmpreg; \
- \
- __asm__ __volatile__( \
- "movl %%cr3, %0; \n" \
- "movl %0, %%cr3; # flush TLB \n" \
- : "=r" (tmpreg) \
- :: "memory"); \
- } while (0)
-
-/*
- * Global pages have to be flushed a bit differently. Not a real
- * performance problem because this does not happen often.
- */
-#define __flush_tlb_global() \
- do { \
- unsigned int tmpreg, cr4, cr4_orig; \
- \
- __asm__ __volatile__( \
- "movl %%cr4, %2; # turn off PGE \n" \
- "movl %2, %1; \n" \
- "andl %3, %1; \n" \
- "movl %1, %%cr4; \n" \
- "movl %%cr3, %0; \n" \
- "movl %0, %%cr3; # flush TLB \n" \
- "movl %2, %%cr4; # turn PGE back on \n" \
- : "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig) \
- : "i" (~X86_CR4_PGE) \
- : "memory"); \
- } while (0)
+#include <mach_tlbflush.h>
extern unsigned long pgkern_mask;
@@ -49,9 +18,6 @@ extern unsigned long pgkern_mask;
#define cpu_has_invlpg (boot_cpu_data.x86 > 3)
-#define __flush_tlb_single(addr) \
- __asm__ __volatile__("invlpg %0": :"m" (*(char *) addr))
-
#ifdef CONFIG_X86_INVLPG
# define __flush_tlb_one(addr) __flush_tlb_single(addr)
#else
Index: linux-2.6.16-rc5/include/asm-i386/mach-vmi/mach_tlbflush.h
===================================================================
--- linux-2.6.16-rc5.orig/include/asm-i386/mach-vmi/mach_tlbflush.h
2006-03-10 13:03:38.000000000 -0800
+++ linux-2.6.16-rc5/include/asm-i386/mach-vmi/mach_tlbflush.h 2006-03-10
13:03:38.000000000 -0800
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2005, VMware, Inc.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to zach@xxxxxxxxxx
+ *
+ */
+
+
+#ifndef _MACH_TLBFLUSH_H
+#define _MACH_TLBFLUSH_H
+
+#include <vmi.h>
+
+static inline void __flush_tlb(void)
+{
+ vmi_wrap_call(
+ FlushTLB, "mov %%cr3, %%eax; mov %%eax, %%cr3",
+ VMI_NO_OUTPUT,
+ 1, VMI_IREG1(VMI_FLUSH_TLB),
+ VMI_CLOBBER_EXTENDED(ZERO_RETURNS, "eax", "memory"));
+}
+
+static inline void __flush_tlb_global(void)
+{
+ vmi_wrap_call(
+ FlushTLB, "mov %%cr4, %%eax; \n"
+ "andb $0x7f, %%al; \n"
+ "mov %%eax, %%cr4; \n"
+ "orb $0x80, %%al; \n"
+ "mov %%eax, %%cr4",
+ VMI_NO_OUTPUT,
+ 1, VMI_IREG1(VMI_FLUSH_TLB | VMI_FLUSH_GLOBAL),
+ VMI_CLOBBER_EXTENDED(ZERO_RETURNS, "eax", "memory"));
+}
+
+static inline void __flush_tlb_single(u32 va)
+{
+ vmi_wrap_call(
+ InvalPage, "invlpg (%0)",
+ VMI_NO_OUTPUT,
+ 1, VMI_IREG1(va),
+ VMI_CLOBBER_EXTENDED(ZERO_RETURNS, "memory"));
+}
+
+#endif /* _MACH_TLBFLUSH_H */
Index: linux-2.6.16-rc5/include/asm-i386/mach-default/mach_tlbflush.h
===================================================================
--- linux-2.6.16-rc5.orig/include/asm-i386/mach-default/mach_tlbflush.h
2006-03-10 13:03:38.000000000 -0800
+++ linux-2.6.16-rc5/include/asm-i386/mach-default/mach_tlbflush.h
2006-03-10 15:59:30.000000000 -0800
@@ -0,0 +1,37 @@
+#ifndef _MACH_TLBFLUSH_H
+#define _MACH_TLBFLUSH_H
+
+#define __flush_tlb() \
+ do { \
+ unsigned int tmpreg; \
+ \
+ __asm__ __volatile__( \
+ "movl %%cr3, %0; \n" \
+ "movl %0, %%cr3; # flush TLB \n" \
+ : "=r" (tmpreg) \
+ :: "memory"); \
+ } while (0)
+
+/*
+ * Global pages have to be flushed a bit differently. Not a real
+ * performance problem because this does not happen often.
+ */
+#define __flush_tlb_global() \
+ do { \
+ unsigned int tmpreg; \
+ \
+ __asm__ __volatile__( \
+ "movl %1, %%cr4; # turn off PGE \n" \
+ "movl %%cr3, %0; \n" \
+ "movl %0, %%cr3; # flush TLB \n" \
+ "movl %2, %%cr4; # turn PGE back on \n" \
+ : "=&r" (tmpreg) \
+ : "r" (mmu_cr4_features & ~X86_CR4_PGE), \
+ "r" (mmu_cr4_features) \
+ : "memory"); \
+ } while (0)
+
+#define __flush_tlb_single(addr) \
+ __asm__ __volatile__("invlpg %0": :"m" (*(char *) addr))
+
+#endif /* _MACH_TLBFLUSH_H */
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