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Date:      Tue, 26 Jan 2010 20:58:09 +0000 (UTC)
From:      John Baldwin <jhb@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org
Subject:   svn commit: r203047 - in stable/7/sys: amd64/amd64 amd64/include i386/i386 i386/include
Message-ID:  <201001262058.o0QKw9T6002049@svn.freebsd.org>

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Author: jhb
Date: Tue Jan 26 20:58:09 2010
New Revision: 203047
URL: http://svn.freebsd.org/changeset/base/203047

Log:
  MFC 195820, 195940, 196643, 197663, 199067, 199215, and 199253:
  Optimize the cache flushing done when changing caching attributes of pages
  by doing nothing for CPUs that support self-snooping and using CLFLUSH
  instead of a full cache invalidate when possible.
  - On i386 take care of possible mappings of the page by sf buffer by
    utilizing the mapping for clflush, otherwise map the page transiently.
    Amd64 uses the direct map.
  - Do not use CLFLUSH on Intel CPUs due to problems with flushing the local
    APIC range by default.  This can be further controlled via the
    hw.clflush_disable loader tunable.  A setting of 1 disables the
    use of CLFLUSH.  A setting of 0 allows CLFLUSH to be used for Intel
    CPUs when CPUID_SS is not present.
  
  Approved by:	re (kib)

Modified:
  stable/7/sys/amd64/amd64/initcpu.c
  stable/7/sys/amd64/amd64/machdep.c
  stable/7/sys/amd64/amd64/pmap.c
  stable/7/sys/amd64/include/cpufunc.h
  stable/7/sys/amd64/include/md_var.h
  stable/7/sys/i386/i386/initcpu.c
  stable/7/sys/i386/i386/pmap.c
  stable/7/sys/i386/i386/vm_machdep.c
  stable/7/sys/i386/include/cpufunc.h
  stable/7/sys/i386/include/md_var.h
  stable/7/sys/i386/include/pmap.h
  stable/7/sys/i386/include/sf_buf.h
Directory Properties:
  stable/7/sys/   (props changed)
  stable/7/sys/cddl/contrib/opensolaris/   (props changed)
  stable/7/sys/contrib/dev/acpica/   (props changed)
  stable/7/sys/contrib/pf/   (props changed)

Modified: stable/7/sys/amd64/amd64/initcpu.c
==============================================================================
--- stable/7/sys/amd64/amd64/initcpu.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/amd64/amd64/initcpu.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -47,6 +47,12 @@ __FBSDID("$FreeBSD$");
 static int	hw_instruction_sse;
 SYSCTL_INT(_hw, OID_AUTO, instruction_sse, CTLFLAG_RD,
     &hw_instruction_sse, 0, "SIMD/MMX2 instructions available in CPU");
+/*
+ * -1: automatic (default)
+ *  0: keep enable CLFLUSH
+ *  1: force disable CLFLUSH
+ */
+static int	hw_clflush_disable = -1;
 
 int	cpu;			/* Are we 386, 386sx, 486, etc? */
 u_int	cpu_feature;		/* Feature flags */
@@ -65,6 +71,7 @@ char	cpu_vendor[20];		/* CPU Origin code
 u_int	cpu_vendor_id;		/* CPU vendor ID */
 u_int	cpu_fxsr;		/* SSE enabled */
 u_int	cpu_mxcsr_mask;		/* Valid bits in mxcsr */
+u_int	cpu_clflush_line_size = 32;
 
 SYSCTL_UINT(_hw, OID_AUTO, via_feature_rng, CTLFLAG_RD,
 	&via_feature_rng, 0, "VIA C3/C7 RNG feature available in CPU");
@@ -157,3 +164,31 @@ initializecpu(void)
 	    CPUID_TO_MODEL(cpu_id) >= 0xf)
 		init_via();
 }
+
+void
+initializecpucache()
+{
+
+	/*
+	 * CPUID with %eax = 1, %ebx returns
+	 * Bits 15-8: CLFLUSH line size
+	 * 	(Value * 8 = cache line size in bytes)
+	 */
+	if ((cpu_feature & CPUID_CLFSH) != 0)
+		cpu_clflush_line_size = ((cpu_procinfo >> 8) & 0xff) * 8;
+	/*
+	 * XXXKIB: (temporary) hack to work around traps generated when
+	 * CLFLUSHing APIC registers window.
+	 */
+	TUNABLE_INT_FETCH("hw.clflush_disable", &hw_clflush_disable);
+	if (cpu_vendor_id == CPU_VENDOR_INTEL && !(cpu_feature & CPUID_SS) &&
+	    hw_clflush_disable == -1)
+		cpu_feature &= ~CPUID_CLFSH;
+	/*
+	 * Allow to disable CLFLUSH feature manually by
+	 * hw.clflush_disable tunable.  This may help Xen guest on some AMD
+	 * CPUs.
+	 */
+	if (hw_clflush_disable == 1)
+		cpu_feature &= ~CPUID_CLFSH;
+}

Modified: stable/7/sys/amd64/amd64/machdep.c
==============================================================================
--- stable/7/sys/amd64/amd64/machdep.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/amd64/amd64/machdep.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -1332,6 +1332,7 @@ hammer_time(u_int64_t modulep, u_int64_t
 
 	identify_cpu();		/* Final stage of CPU initialization */
 	initializecpu();	/* Initialize CPU registers */
+	initializecpucache();
 
 	/* make an initial tss so cpu can get interrupt stack on syscall! */
 	common_tss[0].tss_rsp0 = thread0.td_kstack + \

Modified: stable/7/sys/amd64/amd64/pmap.c
==============================================================================
--- stable/7/sys/amd64/amd64/pmap.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/amd64/amd64/pmap.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -228,6 +228,7 @@ static vm_page_t pmap_enter_quick_locked
     vm_page_t m, vm_prot_t prot, vm_page_t mpte);
 static void pmap_fill_ptp(pt_entry_t *firstpte, pt_entry_t newpte);
 static void pmap_insert_pt_page(pmap_t pmap, vm_page_t mpte);
+static void pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva);
 static boolean_t pmap_is_modified_pvh(struct md_page *pvh);
 static void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int mode);
 static vm_page_t pmap_lookup_pt_page(pmap_t pmap, vm_offset_t va);
@@ -934,6 +935,40 @@ pmap_invalidate_cache(void)
 }
 #endif /* !SMP */
 
+static void
+pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva)
+{
+
+	KASSERT((sva & PAGE_MASK) == 0,
+	    ("pmap_invalidate_cache_range: sva not page-aligned"));
+	KASSERT((eva & PAGE_MASK) == 0,
+	    ("pmap_invalidate_cache_range: eva not page-aligned"));
+
+	if (cpu_feature & CPUID_SS)
+		; /* If "Self Snoop" is supported, do nothing. */
+	else if (cpu_feature & CPUID_CLFSH) {
+
+		/*
+		 * Otherwise, do per-cache line flush.  Use the mfence
+		 * instruction to insure that previous stores are
+		 * included in the write-back.  The processor
+		 * propagates flush to other processors in the cache
+		 * coherence domain.
+		 */
+		mfence();
+		for (; sva < eva; sva += cpu_clflush_line_size)
+			clflush(sva);
+		mfence();
+	} else {
+
+		/*
+		 * No targeted cache flush methods are supported by CPU,
+		 * globally invalidate cache as a last resort.
+		 */
+		pmap_invalidate_cache();
+	}
+}
+
 /*
  * Are we current address space or kernel?
  */
@@ -4229,7 +4264,8 @@ pmap_pde_attr(pd_entry_t *pde, int cache
 void *
 pmap_mapdev_attr(vm_paddr_t pa, vm_size_t size, int mode)
 {
-	vm_offset_t va, tmpva, offset;
+	vm_offset_t va, offset;
+	vm_size_t tmpsize;
 
 	/*
 	 * If the specified range of physical addresses fits within the direct
@@ -4246,14 +4282,10 @@ pmap_mapdev_attr(vm_paddr_t pa, vm_size_
 	if (!va)
 		panic("pmap_mapdev: Couldn't alloc kernel virtual memory");
 	pa = trunc_page(pa);
-	for (tmpva = va; size > 0; ) {
-		pmap_kenter_attr(tmpva, pa, mode);
-		size -= PAGE_SIZE;
-		tmpva += PAGE_SIZE;
-		pa += PAGE_SIZE;
-	}
-	pmap_invalidate_range(kernel_pmap, va, tmpva);
-	pmap_invalidate_cache();
+	for (tmpsize = 0; tmpsize < size; tmpsize += PAGE_SIZE)
+		pmap_kenter_attr(va + tmpsize, pa + tmpsize, mode);
+	pmap_invalidate_range(kernel_pmap, va, va + tmpsize);
+	pmap_invalidate_cache_range(va, va + tmpsize);
 	return ((void *)(va + offset));
 }
 
@@ -4473,7 +4505,7 @@ pmap_change_attr_locked(vm_offset_t va, 
 	 */
 	if (changed) {
 		pmap_invalidate_range(kernel_pmap, base, tmpva);
-		pmap_invalidate_cache();
+		pmap_invalidate_cache_range(base, tmpva);
 	}
 	return (error);
 }

Modified: stable/7/sys/amd64/include/cpufunc.h
==============================================================================
--- stable/7/sys/amd64/include/cpufunc.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/amd64/include/cpufunc.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -100,6 +100,13 @@ bsrq(u_long mask)
 }
 
 static __inline void
+clflush(u_long addr)
+{
+
+	__asm __volatile("clflush %0" : : "m" (*(char *)addr));
+}
+
+static __inline void
 disable_intr(void)
 {
 	__asm __volatile("cli" : : : "memory");
@@ -338,6 +345,13 @@ outw(u_int port, u_short data)
 }
 
 static __inline void
+mfence(void)
+{
+
+	__asm__ __volatile("mfence" : : : "memory");
+}
+
+static __inline void
 ia32_pause(void)
 {
 	__asm __volatile("pause");

Modified: stable/7/sys/amd64/include/md_var.h
==============================================================================
--- stable/7/sys/amd64/include/md_var.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/amd64/include/md_var.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -47,6 +47,7 @@ extern	u_int	amd_feature2;
 extern	u_int	amd_pminfo;
 extern	u_int	via_feature_rng;
 extern	u_int	via_feature_xcrypt;
+extern	u_int	cpu_clflush_line_size;
 extern	u_int	cpu_fxsr;
 extern	u_int	cpu_high;
 extern	u_int	cpu_id;
@@ -75,6 +76,7 @@ void	doreti_iret_fault(void) __asm(__STR
 void	dump_add_page(vm_paddr_t);
 void	dump_drop_page(vm_paddr_t);
 void	initializecpu(void);
+void	initializecpucache(void);
 void	fillw(int /*u_short*/ pat, void *base, size_t cnt);
 void	fpstate_drop(struct thread *td);
 int	is_physical_memory(vm_paddr_t addr);

Modified: stable/7/sys/i386/i386/initcpu.c
==============================================================================
--- stable/7/sys/i386/i386/initcpu.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/i386/initcpu.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -75,6 +75,12 @@ static void	init_mendocino(void);
 static int	hw_instruction_sse;
 SYSCTL_INT(_hw, OID_AUTO, instruction_sse, CTLFLAG_RD,
     &hw_instruction_sse, 0, "SIMD/MMX2 instructions available in CPU");
+/*
+ * -1: automatic (default)
+ *  0: keep enable CLFLUSH
+ *  1: force disable CLFLUSH
+ */
+static int	hw_clflush_disable = -1;
 
 /* Must *NOT* be BSS or locore will bzero these after setting them */
 int	cpu = 0;		/* Are we 386, 386sx, 486, etc? */
@@ -91,6 +97,7 @@ u_int	cpu_procinfo = 0;	/* HyperThreadin
 u_int	cpu_procinfo2 = 0;	/* Multicore info */
 char	cpu_vendor[20] = "";	/* CPU Origin code */
 u_int	cpu_vendor_id = 0;	/* CPU vendor ID */
+u_int	cpu_clflush_line_size = 32;
 
 SYSCTL_UINT(_hw, OID_AUTO, via_feature_rng, CTLFLAG_RD,
 	&via_feature_rng, 0, "VIA C3/C7 RNG feature available in CPU");
@@ -709,6 +716,29 @@ initializecpu(void)
 	}
 	enable_sse();
 
+	/*
+	 * CPUID with %eax = 1, %ebx returns
+	 * Bits 15-8: CLFLUSH line size
+	 * 	(Value * 8 = cache line size in bytes)
+	 */
+	if ((cpu_feature & CPUID_CLFSH) != 0)
+		cpu_clflush_line_size = ((cpu_procinfo >> 8) & 0xff) * 8;
+	/*
+	 * XXXKIB: (temporary) hack to work around traps generated when
+	 * CLFLUSHing APIC registers window.
+	 */
+	TUNABLE_INT_FETCH("hw.clflush_disable", &hw_clflush_disable);
+	if (cpu_vendor_id == CPU_VENDOR_INTEL && !(cpu_feature & CPUID_SS) &&
+	    hw_clflush_disable == -1)
+		cpu_feature &= ~CPUID_CLFSH;
+	/*
+	 * Allow to disable CLFLUSH feature manually by
+	 * hw.clflush_disable tunable.  This may help Xen guest on some AMD
+	 * CPUs.
+	 */
+	if (hw_clflush_disable == 1)
+		cpu_feature &= ~CPUID_CLFSH;
+
 #if defined(PC98) && !defined(CPU_UPGRADE_HW_CACHE)
 	/*
 	 * OS should flush L1 cache by itself because no PC-98 supports

Modified: stable/7/sys/i386/i386/pmap.c
==============================================================================
--- stable/7/sys/i386/i386/pmap.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/i386/pmap.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -119,6 +119,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/msgbuf.h>
 #include <sys/mutex.h>
 #include <sys/proc.h>
+#include <sys/sf_buf.h>
 #include <sys/sx.h>
 #include <sys/vmmeter.h>
 #include <sys/sched.h>
@@ -735,7 +736,7 @@ SYSCTL_ULONG(_vm_pmap_pde, OID_AUTO, pro
  * Determine the appropriate bits to set in a PTE or PDE for a specified
  * caching mode.
  */
-static int
+int
 pmap_cache_bits(int mode, boolean_t is_pde)
 {
 	int pat_flag, pat_index, cache_bits;
@@ -944,6 +945,40 @@ pmap_invalidate_cache(void)
 }
 #endif /* !SMP */
 
+void
+pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva)
+{
+
+	KASSERT((sva & PAGE_MASK) == 0,
+	    ("pmap_invalidate_cache_range: sva not page-aligned"));
+	KASSERT((eva & PAGE_MASK) == 0,
+	    ("pmap_invalidate_cache_range: eva not page-aligned"));
+
+	if (cpu_feature & CPUID_SS)
+		; /* If "Self Snoop" is supported, do nothing. */
+	else if (cpu_feature & CPUID_CLFSH) {
+
+		/*
+		 * Otherwise, do per-cache line flush.  Use the mfence
+		 * instruction to insure that previous stores are
+		 * included in the write-back.  The processor
+		 * propagates flush to other processors in the cache
+		 * coherence domain.
+		 */
+		mfence();
+		for (; sva < eva; sva += cpu_clflush_line_size)
+			clflush(sva);
+		mfence();
+	} else {
+
+		/*
+		 * No targeted cache flush methods are supported by CPU,
+		 * globally invalidate cache as a last resort.
+		 */
+		pmap_invalidate_cache();
+	}
+}
+
 /*
  * Are we current address space or kernel?  N.B. We return FALSE when
  * a pmap's page table is in use because a kernel thread is borrowing
@@ -4422,7 +4457,8 @@ pmap_pde_attr(pd_entry_t *pde, int cache
 void *
 pmap_mapdev_attr(vm_paddr_t pa, vm_size_t size, int mode)
 {
-	vm_offset_t va, tmpva, offset;
+	vm_offset_t va, offset;
+	vm_size_t tmpsize;
 
 	offset = pa & PAGE_MASK;
 	size = roundup(offset + size, PAGE_SIZE);
@@ -4435,16 +4471,10 @@ pmap_mapdev_attr(vm_paddr_t pa, vm_size_
 	if (!va)
 		panic("pmap_mapdev: Couldn't alloc kernel virtual memory");
 
-	for (tmpva = va; size > 0; ) {
-		pmap_kenter_attr(tmpva, pa, mode);
-		size -= PAGE_SIZE;
-		tmpva += PAGE_SIZE;
-		pa += PAGE_SIZE;
-	}
-	pmap_invalidate_range(kernel_pmap, va, tmpva);
-	/* If "Self Snoop" is supported, do nothing. */
-	if (!(cpu_feature & CPUID_SS))
-		pmap_invalidate_cache();
+	for (tmpsize = 0; tmpsize < size; tmpsize += PAGE_SIZE)
+		pmap_kenter_attr(va + tmpsize, pa + tmpsize, mode);
+	pmap_invalidate_range(kernel_pmap, va, va + tmpsize);
+	pmap_invalidate_cache_range(va, va + size);
 	return ((void *)(va + offset));
 }
 
@@ -4484,16 +4514,48 @@ pmap_unmapdev(vm_offset_t va, vm_size_t 
 void
 pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma)
 {
+	struct sysmaps *sysmaps;
+	vm_offset_t sva, eva;
 
 	m->md.pat_mode = ma;
+	if ((m->flags & PG_FICTITIOUS) != 0)
+		return;
 
 	/*
 	 * If "m" is a normal page, flush it from the cache.
+	 * See pmap_invalidate_cache_range().
+	 *
+	 * First, try to find an existing mapping of the page by sf
+	 * buffer. sf_buf_invalidate_cache() modifies mapping and
+	 * flushes the cache.
 	 */    
-	if ((m->flags & PG_FICTITIOUS) == 0) {
-		/* If "Self Snoop" is supported, do nothing. */
-		if (!(cpu_feature & CPUID_SS))
-			pmap_invalidate_cache();
+	if (sf_buf_invalidate_cache(m))
+		return;
+
+	/*
+	 * If page is not mapped by sf buffer, but CPU does not
+	 * support self snoop, map the page transient and do
+	 * invalidation. In the worst case, whole cache is flushed by
+	 * pmap_invalidate_cache_range().
+	 */
+	if ((cpu_feature & (CPUID_SS|CPUID_CLFSH)) == CPUID_CLFSH) {
+		sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
+		mtx_lock(&sysmaps->lock);
+		if (*sysmaps->CMAP2)
+			panic("pmap_page_set_memattr: CMAP2 busy");
+		sched_pin();
+		*sysmaps->CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(m) |
+		    PG_A | PG_M | pmap_cache_bits(m->md.pat_mode, 0);
+		invlcaddr(sysmaps->CADDR2);
+		sva = (vm_offset_t)sysmaps->CADDR2;
+		eva = sva + PAGE_SIZE;
+	} else
+		sva = eva = 0; /* gcc */
+	pmap_invalidate_cache_range(sva, eva);
+	if (sva != 0) {
+		*sysmaps->CMAP2 = 0;
+		sched_unpin();
+		mtx_unlock(&sysmaps->lock);
 	}
 }
 
@@ -4606,7 +4668,7 @@ pmap_change_attr(vm_offset_t va, vm_size
 	 */
 	if (changed) {
 		pmap_invalidate_range(kernel_pmap, base, tmpva);
-		pmap_invalidate_cache();
+		pmap_invalidate_cache_range(base, tmpva);
 	}
 	return (0);
 }

Modified: stable/7/sys/i386/i386/vm_machdep.c
==============================================================================
--- stable/7/sys/i386/i386/vm_machdep.c	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/i386/vm_machdep.c	Tue Jan 26 20:58:09 2010	(r203047)
@@ -710,6 +710,39 @@ sf_buf_init(void *arg)
 }
 
 /*
+ * Invalidate the cache lines that may belong to the page, if
+ * (possibly old) mapping of the page by sf buffer exists.  Returns
+ * TRUE when mapping was found and cache invalidated.
+ */
+boolean_t
+sf_buf_invalidate_cache(vm_page_t m)
+{
+	struct sf_head *hash_list;
+	struct sf_buf *sf;
+	boolean_t ret;
+
+	hash_list = &sf_buf_active[SF_BUF_HASH(m)];
+	ret = FALSE;
+	mtx_lock(&sf_buf_lock);
+	LIST_FOREACH(sf, hash_list, list_entry) {
+		if (sf->m == m) {
+			/*
+			 * Use pmap_qenter to update the pte for
+			 * existing mapping, in particular, the PAT
+			 * settings are recalculated.
+			 */
+			pmap_qenter(sf->kva, &m, 1);
+			pmap_invalidate_cache_range(sf->kva, sf->kva +
+			    PAGE_SIZE);
+			ret = TRUE;
+			break;
+		}
+	}
+	mtx_unlock(&sf_buf_lock);
+	return (ret);
+}
+
+/*
  * Get an sf_buf from the freelist.  May block if none are available.
  */
 struct sf_buf *
@@ -775,7 +808,8 @@ sf_buf_alloc(struct vm_page *m, int flag
 	 */
 	ptep = vtopte(sf->kva);
 	opte = *ptep;
-	*ptep = VM_PAGE_TO_PHYS(m) | pgeflag | PG_RW | PG_V;
+	*ptep = VM_PAGE_TO_PHYS(m) | pgeflag | PG_RW | PG_V |
+	    pmap_cache_bits(m->md.pat_mode, 0);
 
 	/*
 	 * Avoid unnecessary TLB invalidations: If the sf_buf's old

Modified: stable/7/sys/i386/include/cpufunc.h
==============================================================================
--- stable/7/sys/i386/include/cpufunc.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/include/cpufunc.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -79,6 +79,13 @@ bsrl(u_int mask)
 }
 
 static __inline void
+clflush(u_long addr)
+{
+
+	__asm __volatile("clflush %0" : : "m" (*(char *)addr));
+}
+
+static __inline void
 disable_intr(void)
 {
 	__asm __volatile("cli" : : : "memory");
@@ -106,6 +113,13 @@ enable_intr(void)
 	__asm __volatile("sti");
 }
 
+static __inline void
+mfence(void)
+{
+
+	__asm __volatile("mfence" : : : "memory");
+}
+
 #ifdef _KERNEL
 
 #define	HAVE_INLINE_FFS

Modified: stable/7/sys/i386/include/md_var.h
==============================================================================
--- stable/7/sys/i386/include/md_var.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/include/md_var.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -52,6 +52,7 @@ extern	u_int	amd_feature2;
 extern	u_int	amd_pminfo;
 extern	u_int	via_feature_rng;
 extern	u_int	via_feature_xcrypt;
+extern	u_int	cpu_clflush_line_size;
 extern	u_int	cpu_fxsr;
 extern	u_int	cpu_high;
 extern	u_int	cpu_id;

Modified: stable/7/sys/i386/include/pmap.h
==============================================================================
--- stable/7/sys/i386/include/pmap.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/include/pmap.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -415,6 +415,7 @@ extern vm_offset_t virtual_end;
 #define	pmap_unmapbios(va, sz)	pmap_unmapdev((va), (sz))
 
 void	pmap_bootstrap(vm_paddr_t);
+int	pmap_cache_bits(int mode, boolean_t is_pde);
 int	pmap_change_attr(vm_offset_t, vm_size_t, int);
 void	pmap_init_pat(void);
 void	pmap_kenter(vm_offset_t va, vm_paddr_t pa);
@@ -432,6 +433,7 @@ void	pmap_invalidate_page(pmap_t, vm_off
 void	pmap_invalidate_range(pmap_t, vm_offset_t, vm_offset_t);
 void	pmap_invalidate_all(pmap_t);
 void	pmap_invalidate_cache(void);
+void	pmap_invalidate_cache_range(vm_offset_t, vm_offset_t);
 
 #endif /* _KERNEL */
 

Modified: stable/7/sys/i386/include/sf_buf.h
==============================================================================
--- stable/7/sys/i386/include/sf_buf.h	Tue Jan 26 20:50:41 2010	(r203046)
+++ stable/7/sys/i386/include/sf_buf.h	Tue Jan 26 20:58:09 2010	(r203047)
@@ -58,4 +58,6 @@ sf_buf_page(struct sf_buf *sf)
 	return (sf->m);
 }
 
+boolean_t sf_buf_invalidate_cache(vm_page_t m);
+
 #endif /* !_MACHINE_SF_BUF_H_ */



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