PV i386 patch
Alan Cox
alc at rice.edu
Tue Dec 27 17:40:39 UTC 2011
On 12/23/2011 16:25, Sean Bruno wrote:
> On Wed, 2011-12-21 at 12:47 -0800, Alan Cox wrote:
>> Can you please try the attached patch? I'm trying to reduce the number
>> of differences between the native and Xen pmap implementations.
>>
>> Alan
>>
>
> Without really looking at the output, I note that this didn't apply
> cleanly against -head ... can you regenerate it?
>
My bad. I gave you the wrong patch. Try this instead.
Alan
-------------- next part --------------
Index: i386/i386/pmap.c
===================================================================
--- i386/i386/pmap.c (revision 228570)
+++ i386/i386/pmap.c (working copy)
@@ -330,7 +330,7 @@ static void pmap_update_pde_invalidate(vm_offset_t
static vm_page_t pmap_allocpte(pmap_t pmap, vm_offset_t va, int flags);
-static vm_page_t _pmap_allocpte(pmap_t pmap, unsigned ptepindex, int flags);
+static vm_page_t _pmap_allocpte(pmap_t pmap, u_int ptepindex, int flags);
static int _pmap_unwire_pte_hold(pmap_t pmap, vm_page_t m, vm_page_t *free);
static pt_entry_t *pmap_pte_quick(pmap_t pmap, vm_offset_t va);
static void pmap_pte_release(pt_entry_t *pte);
@@ -340,6 +340,8 @@ static void *pmap_pdpt_allocf(uma_zone_t zone, int
#endif
static void pmap_set_pg(void);
+static __inline void pagezero(void *page);
+
CTASSERT(1 << PDESHIFT == sizeof(pd_entry_t));
CTASSERT(1 << PTESHIFT == sizeof(pt_entry_t));
@@ -1216,7 +1218,7 @@ pmap_is_current(pmap_t pmap)
{
return (pmap == kernel_pmap ||
- (pmap == vmspace_pmap(curthread->td_proc->p_vmspace) &&
+ (pmap == vmspace_pmap(curthread->td_proc->p_vmspace) &&
(pmap->pm_pdir[PTDPTDI] & PG_FRAME) == (PTDpde[0] & PG_FRAME)));
}
@@ -1759,7 +1761,6 @@ pmap_pinit(pmap_t pmap)
if (pmap->pm_pdir == NULL) {
pmap->pm_pdir = (pd_entry_t *)kmem_alloc_nofault(kernel_map,
NBPTD);
-
if (pmap->pm_pdir == NULL) {
PMAP_LOCK_DESTROY(pmap);
return (0);
@@ -1792,10 +1793,9 @@ pmap_pinit(pmap_t pmap)
pmap_qenter((vm_offset_t)pmap->pm_pdir, ptdpg, NPGPTD);
- for (i = 0; i < NPGPTD; i++) {
+ for (i = 0; i < NPGPTD; i++)
if ((ptdpg[i]->flags & PG_ZERO) == 0)
- bzero(pmap->pm_pdir + (i * NPDEPG), PAGE_SIZE);
- }
+ pagezero(pmap->pm_pdir + (i * NPDEPG));
mtx_lock_spin(&allpmaps_lock);
LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
@@ -1824,7 +1824,7 @@ pmap_pinit(pmap_t pmap)
* mapped correctly.
*/
static vm_page_t
-_pmap_allocpte(pmap_t pmap, unsigned ptepindex, int flags)
+_pmap_allocpte(pmap_t pmap, u_int ptepindex, int flags)
{
vm_paddr_t ptepa;
vm_page_t m;
@@ -1872,7 +1872,7 @@ static vm_page_t
static vm_page_t
pmap_allocpte(pmap_t pmap, vm_offset_t va, int flags)
{
- unsigned ptepindex;
+ u_int ptepindex;
pd_entry_t ptepa;
vm_page_t m;
@@ -2020,7 +2020,7 @@ pmap_lazyfix(pmap_t pmap)
cr3 = vtophys(pmap->pm_pdir);
if (cr3 == rcr3()) {
load_cr3(PCPU_GET(curpcb)->pcb_cr3);
- CPU_CLR(PCPU_GET(cpuid), &pmap->pm_active);
+ CPU_CLR(PCPU_GET(cpuid), &pmap->pm_active);
}
}
#endif /* SMP */
@@ -2849,7 +2849,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offse
}
for (; sva < eva; sva = pdnxt) {
- unsigned pdirindex;
+ u_int pdirindex;
/*
* Calculate index for next page table.
@@ -3070,7 +3070,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offs
PMAP_LOCK(pmap);
for (; sva < eva; sva = pdnxt) {
pt_entry_t obits, pbits;
- unsigned pdirindex;
+ u_int pdirindex;
pdnxt = (sva + NBPDR) & ~PDRMASK;
if (pdnxt < sva)
@@ -3596,7 +3596,7 @@ pmap_enter_object(pmap_t pmap, vm_offset_t start,
m = TAILQ_NEXT(m, listq);
}
vm_page_unlock_queues();
- PMAP_UNLOCK(pmap);
+ PMAP_UNLOCK(pmap);
}
/*
@@ -3638,7 +3638,7 @@ pmap_enter_quick_locked(pmap_t pmap, vm_offset_t v
* resident, we are creating it here.
*/
if (va < VM_MAXUSER_ADDRESS) {
- unsigned ptepindex;
+ u_int ptepindex;
pd_entry_t ptepa;
/*
@@ -3904,7 +3904,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_off
pt_entry_t *src_pte, *dst_pte;
vm_page_t dstmpte, srcmpte;
pd_entry_t srcptepaddr;
- unsigned ptepindex;
+ u_int ptepindex;
KASSERT(addr < UPT_MIN_ADDRESS,
("pmap_copy: invalid to pmap_copy page tables"));
@@ -5244,7 +5244,7 @@ pmap_pid_dump(int pid)
#if defined(DEBUG)
static void pads(pmap_t pm);
-void pmap_pvdump(vm_offset_t pa);
+void pmap_pvdump(vm_paddr_t pa);
/* print address space of pmap*/
static void
Index: i386/xen/pmap.c
===================================================================
--- i386/xen/pmap.c (revision 228746)
+++ i386/xen/pmap.c (working copy)
@@ -125,6 +125,8 @@ __FBSDID("$FreeBSD$");
#include <sys/sysctl.h>
#ifdef SMP
#include <sys/smp.h>
+#else
+#include <sys/cpuset.h>
#endif
#include <vm/vm.h>
@@ -221,6 +223,8 @@ extern u_int32_t KERNend;
pt_entry_t pg_nx;
#endif
+static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
+
static int pat_works; /* Is page attribute table sane? */
/*
@@ -273,19 +277,6 @@ SYSCTL_INT(_debug, OID_AUTO, PMAP1unchanged, CTLFL
"Number of times pmap_pte_quick didn't change PMAP1");
static struct mtx PMAP2mutex;
-static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
-
-SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_max, CTLFLAG_RD, &pv_entry_max, 0,
- "Max number of PV entries");
-SYSCTL_INT(_vm_pmap, OID_AUTO, shpgperproc, CTLFLAG_RD, &shpgperproc, 0,
- "Page share factor per proc");
-static SYSCTL_NODE(_vm_pmap, OID_AUTO, pde, CTLFLAG_RD, 0,
- "2/4MB page mapping counters");
-
-static u_long pmap_pde_mappings;
-SYSCTL_ULONG(_vm_pmap_pde, OID_AUTO, mappings, CTLFLAG_RD,
- &pmap_pde_mappings, 0, "2/4MB page mappings");
-
static void free_pv_entry(pmap_t pmap, pv_entry_t pv);
static pv_entry_t get_pv_entry(pmap_t locked_pmap, int try);
static void pmap_pvh_free(struct md_page *pvh, pmap_t pmap, vm_offset_t va);
@@ -294,6 +285,8 @@ static pv_entry_t pmap_pvh_remove(struct md_page *
static vm_page_t pmap_enter_quick_locked(multicall_entry_t **mcl, int *count, pmap_t pmap, vm_offset_t va,
vm_page_t m, vm_prot_t prot, vm_page_t mpte);
+static void pmap_flush_page(vm_page_t m);
+static void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int mode);
static int pmap_remove_pte(pmap_t pmap, pt_entry_t *ptq, vm_offset_t sva,
vm_page_t *free);
static void pmap_remove_page(struct pmap *pmap, vm_offset_t va,
@@ -305,14 +298,12 @@ static boolean_t pmap_try_insert_pv_entry(pmap_t p
static vm_page_t pmap_allocpte(pmap_t pmap, vm_offset_t va, int flags);
-static vm_page_t _pmap_allocpte(pmap_t pmap, unsigned ptepindex, int flags);
+static vm_page_t _pmap_allocpte(pmap_t pmap, u_int ptepindex, int flags);
static int _pmap_unwire_pte_hold(pmap_t pmap, vm_page_t m, vm_page_t *free);
static pt_entry_t *pmap_pte_quick(pmap_t pmap, vm_offset_t va);
static void pmap_pte_release(pt_entry_t *pte);
static int pmap_unuse_pt(pmap_t, vm_offset_t, vm_page_t *);
-static vm_offset_t pmap_kmem_choose(vm_offset_t addr);
static boolean_t pmap_is_prefaultable_locked(pmap_t pmap, vm_offset_t addr);
-static void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int mode);
static __inline void pagezero(void *page);
@@ -326,8 +317,6 @@ CTASSERT(1 << PTESHIFT == sizeof(pt_entry_t));
*/
CTASSERT(KERNBASE % (1 << 24) == 0);
-
-
void
pd_set(struct pmap *pmap, int ptepindex, vm_paddr_t val, int type)
{
@@ -359,24 +348,6 @@ pd_set(struct pmap *pmap, int ptepindex, vm_paddr_
}
/*
- * Move the kernel virtual free pointer to the next
- * 4MB. This is used to help improve performance
- * by using a large (4MB) page for much of the kernel
- * (.text, .data, .bss)
- */
-static vm_offset_t
-pmap_kmem_choose(vm_offset_t addr)
-{
- vm_offset_t newaddr = addr;
-
-#ifndef DISABLE_PSE
- if (cpu_feature & CPUID_PSE)
- newaddr = (addr + PDRMASK) & ~PDRMASK;
-#endif
- return newaddr;
-}
-
-/*
* Bootstrap the system enough to run with virtual memory.
*
* On the i386 this is called after mapping has already been enabled
@@ -395,15 +366,13 @@ pmap_bootstrap(vm_paddr_t firstaddr)
int i;
/*
- * XXX The calculation of virtual_avail is wrong. It's NKPT*PAGE_SIZE too
- * large. It should instead be correctly calculated in locore.s and
- * not based on 'first' (which is a physical address, not a virtual
- * address, for the start of unused physical memory). The kernel
- * page tables are NOT double mapped and thus should not be included
- * in this calculation.
+ * Initialize the first available kernel virtual address. However,
+ * using "firstaddr" may waste a few pages of the kernel virtual
+ * address space, because locore may not have mapped every physical
+ * page that it allocated. Preferably, locore would provide a first
+ * unused virtual address in addition to "firstaddr".
*/
virtual_avail = (vm_offset_t) KERNBASE + firstaddr;
- virtual_avail = pmap_kmem_choose(virtual_avail);
virtual_end = VM_MAX_KERNEL_ADDRESS;
@@ -468,8 +437,8 @@ pmap_bootstrap(vm_paddr_t firstaddr)
/*
* ptemap is used for pmap_pte_quick
*/
- SYSMAP(pt_entry_t *, PMAP1, PADDR1, 1);
- SYSMAP(pt_entry_t *, PMAP2, PADDR2, 1);
+ SYSMAP(pt_entry_t *, PMAP1, PADDR1, 1)
+ SYSMAP(pt_entry_t *, PMAP2, PADDR2, 1)
mtx_init(&PMAP2mutex, "PMAP2", NULL, MTX_DEF);
@@ -650,6 +619,18 @@ pmap_init(void)
}
+SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_max, CTLFLAG_RD, &pv_entry_max, 0,
+ "Max number of PV entries");
+SYSCTL_INT(_vm_pmap, OID_AUTO, shpgperproc, CTLFLAG_RD, &shpgperproc, 0,
+ "Page share factor per proc");
+
+static SYSCTL_NODE(_vm_pmap, OID_AUTO, pde, CTLFLAG_RD, 0,
+ "2/4MB page mapping counters");
+
+static u_long pmap_pde_mappings;
+SYSCTL_ULONG(_vm_pmap_pde, OID_AUTO, mappings, CTLFLAG_RD,
+ &pmap_pde_mappings, 0, "2/4MB page mappings");
+
/***************************************************
* Low level helper routines.....
***************************************************/
@@ -896,6 +877,8 @@ pmap_invalidate_cache(void)
}
#endif /* !SMP */
+#define PMAP_CLFLUSH_THRESHOLD (2 * 1024 * 1024)
+
void
pmap_invalidate_cache_range(vm_offset_t sva, vm_offset_t eva)
{
@@ -907,7 +890,8 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_of
if (cpu_feature & CPUID_SS)
; /* If "Self Snoop" is supported, do nothing. */
- else if (cpu_feature & CPUID_CLFSH) {
+ else if ((cpu_feature & CPUID_CLFSH) != 0 &&
+ eva - sva < PMAP_CLFLUSH_THRESHOLD) {
/*
* Otherwise, do per-cache line flush. Use the mfence
@@ -924,12 +908,27 @@ pmap_invalidate_cache_range(vm_offset_t sva, vm_of
/*
* No targeted cache flush methods are supported by CPU,
- * globally invalidate cache as a last resort.
+ * or the supplied range is bigger than 2MB.
+ * Globally invalidate cache.
*/
pmap_invalidate_cache();
}
}
+void
+pmap_invalidate_cache_pages(vm_page_t *pages, int count)
+{
+ int i;
+
+ if (count >= PMAP_CLFLUSH_THRESHOLD / PAGE_SIZE ||
+ (cpu_feature & CPUID_CLFSH) == 0) {
+ pmap_invalidate_cache();
+ } else {
+ for (i = 0; i < count; i++)
+ pmap_flush_page(pages[i]);
+ }
+}
+
/*
* 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
@@ -942,7 +941,7 @@ pmap_is_current(pmap_t pmap)
return (pmap == kernel_pmap ||
(pmap == vmspace_pmap(curthread->td_proc->p_vmspace) &&
- (pmap->pm_pdir[PTDPTDI] & PG_FRAME) == (PTDpde[0] & PG_FRAME)));
+ (pmap->pm_pdir[PTDPTDI] & PG_FRAME) == (PTDpde[0] & PG_FRAME)));
}
/*
@@ -971,10 +970,9 @@ pmap_pte(pmap_t pmap, vm_offset_t va)
CTR3(KTR_PMAP, "pmap_pte: pmap=%p va=0x%x newpte=0x%08x",
pmap, va, (*PMAP2 & 0xffffffff));
}
-
return (PADDR2 + (i386_btop(va) & (NPTEPG - 1)));
}
- return (0);
+ return (NULL);
}
/*
@@ -1065,7 +1063,7 @@ pmap_extract(pmap_t pmap, vm_offset_t va)
pt_entry_t *pte;
pd_entry_t pde;
pt_entry_t pteval;
-
+
rtval = 0;
PMAP_LOCK(pmap);
pde = pmap->pm_pdir[va >> PDRSHIFT];
@@ -1170,10 +1168,13 @@ retry:
/*
* Add a wired page to the kva.
* Note: not SMP coherent.
+ *
+ * This function may be used before pmap_bootstrap() is called.
*/
void
pmap_kenter(vm_offset_t va, vm_paddr_t pa)
{
+
PT_SET_MA(va, xpmap_ptom(pa)| PG_RW | PG_V | pgeflag);
}
@@ -1186,16 +1187,18 @@ pmap_kenter_ma(vm_offset_t va, vm_paddr_t ma)
pte_store_ma(pte, ma | PG_RW | PG_V | pgeflag);
}
-
-static __inline void
+static __inline void
pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int mode)
{
+
PT_SET_MA(va, pa | PG_RW | PG_V | pgeflag | pmap_cache_bits(mode, 0));
}
/*
* Remove a page from the kernel pagetables.
* Note: not SMP coherent.
+ *
+ * This function may be used before pmap_bootstrap() is called.
*/
PMAP_INLINE void
pmap_kremove(vm_offset_t va)
@@ -1292,7 +1295,6 @@ pmap_qenter(vm_offset_t sva, vm_page_t *ma, int co
#endif
}
-
/*
* This routine tears out page mappings from the
* kernel -- it is meant only for temporary mappings.
@@ -1342,9 +1344,9 @@ pmap_unwire_pte_hold(pmap_t pmap, vm_page_t m, vm_
--m->wire_count;
if (m->wire_count == 0)
- return _pmap_unwire_pte_hold(pmap, m, free);
+ return (_pmap_unwire_pte_hold(pmap, m, free));
else
- return 0;
+ return (0);
}
static int
@@ -1385,7 +1387,7 @@ _pmap_unwire_pte_hold(pmap_t pmap, vm_page_t m, vm
m->right = *free;
*free = m;
- return 1;
+ return (1);
}
/*
@@ -1399,17 +1401,25 @@ pmap_unuse_pt(pmap_t pmap, vm_offset_t va, vm_page
vm_page_t mpte;
if (va >= VM_MAXUSER_ADDRESS)
- return 0;
+ return (0);
ptepde = PT_GET(pmap_pde(pmap, va));
mpte = PHYS_TO_VM_PAGE(ptepde & PG_FRAME);
- return pmap_unwire_pte_hold(pmap, mpte, free);
+ return (pmap_unwire_pte_hold(pmap, mpte, free));
}
+/*
+ * Initialize the pmap for the swapper process.
+ */
void
pmap_pinit0(pmap_t pmap)
{
PMAP_LOCK_INIT(pmap);
+ /*
+ * Since the page table directory is shared with the kernel pmap,
+ * which is already included in the list "allpmaps", this pmap does
+ * not need to be inserted into that list.
+ */
pmap->pm_pdir = (pd_entry_t *)(KERNBASE + (vm_offset_t)IdlePTD);
#ifdef PAE
pmap->pm_pdpt = (pdpt_entry_t *)(KERNBASE + (vm_offset_t)IdlePDPT);
@@ -1418,9 +1428,6 @@ pmap_pinit0(pmap_t pmap)
PCPU_SET(curpmap, pmap);
TAILQ_INIT(&pmap->pm_pvchunk);
bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
- mtx_lock_spin(&allpmaps_lock);
- LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
- mtx_unlock_spin(&allpmaps_lock);
}
/*
@@ -1471,18 +1478,19 @@ pmap_pinit(pmap_t pmap)
ptdpg[i++] = m;
}
}
+
pmap_qenter((vm_offset_t)pmap->pm_pdir, ptdpg, NPGPTD);
- for (i = 0; i < NPGPTD; i++) {
+
+ for (i = 0; i < NPGPTD; i++)
if ((ptdpg[i]->flags & PG_ZERO) == 0)
- pagezero(&pmap->pm_pdir[i*NPTEPG]);
- }
+ pagezero(pmap->pm_pdir + (i * NPDEPG));
mtx_lock_spin(&allpmaps_lock);
LIST_INSERT_HEAD(&allpmaps, pmap, pm_list);
+ /* Copy the kernel page table directory entries. */
+ bcopy(PTD + KPTDI, pmap->pm_pdir + KPTDI, nkpt * sizeof(pd_entry_t));
mtx_unlock_spin(&allpmaps_lock);
- /* Wire in kernel global address entries. */
- bcopy(PTD + KPTDI, pmap->pm_pdir + KPTDI, nkpt * sizeof(pd_entry_t));
#ifdef PAE
pmap_qenter((vm_offset_t)pmap->pm_pdpt, &ptdpg[NPGPTD], 1);
if ((ptdpg[NPGPTD]->flags & PG_ZERO) == 0)
@@ -1534,7 +1542,7 @@ pmap_pinit(pmap_t pmap)
* mapped correctly.
*/
static vm_page_t
-_pmap_allocpte(pmap_t pmap, unsigned int ptepindex, int flags)
+_pmap_allocpte(pmap_t pmap, u_int ptepindex, int flags)
{
vm_paddr_t ptema;
vm_page_t m;
@@ -1569,6 +1577,7 @@ static vm_page_t
* Map the pagetable page into the process address space, if
* it isn't already there.
*/
+
pmap->pm_stats.resident_count++;
ptema = VM_PAGE_TO_MACH(m);
@@ -1584,7 +1593,7 @@ static vm_page_t
static vm_page_t
pmap_allocpte(pmap_t pmap, vm_offset_t va, int flags)
{
- unsigned ptepindex;
+ u_int ptepindex;
pd_entry_t ptema;
vm_page_t m;
@@ -1762,6 +1771,7 @@ pmap_release(pmap_t pmap)
#else
int npgptd = NPGPTD;
#endif
+
KASSERT(pmap->pm_stats.resident_count == 0,
("pmap_release: pmap resident count %ld != 0",
pmap->pm_stats.resident_count));
@@ -1817,7 +1827,7 @@ kvm_size(SYSCTL_HANDLER_ARGS)
{
unsigned long ksize = VM_MAX_KERNEL_ADDRESS - KERNBASE;
- return sysctl_handle_long(oidp, &ksize, 0, req);
+ return (sysctl_handle_long(oidp, &ksize, 0, req));
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_size, "IU", "Size of KVM");
@@ -1827,7 +1837,7 @@ kvm_free(SYSCTL_HANDLER_ARGS)
{
unsigned long kfree = VM_MAX_KERNEL_ADDRESS - kernel_vm_end;
- return sysctl_handle_long(oidp, &kfree, 0, req);
+ return (sysctl_handle_long(oidp, &kfree, 0, req));
}
SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
0, 0, kvm_free, "IU", "Amount of KVM free");
@@ -1856,12 +1866,12 @@ pmap_growkernel(vm_offset_t addr)
}
}
}
- addr = roundup2(addr, PAGE_SIZE * NPTEPG);
+ addr = roundup2(addr, NBPDR);
if (addr - 1 >= kernel_map->max_offset)
addr = kernel_map->max_offset;
while (kernel_vm_end < addr) {
if (pdir_pde(PTD, kernel_vm_end)) {
- kernel_vm_end = (kernel_vm_end + PAGE_SIZE * NPTEPG) & ~(PAGE_SIZE * NPTEPG - 1);
+ kernel_vm_end = (kernel_vm_end + NBPDR) & ~PDRMASK;
if (kernel_vm_end - 1 >= kernel_map->max_offset) {
kernel_vm_end = kernel_map->max_offset;
break;
@@ -1869,17 +1879,16 @@ pmap_growkernel(vm_offset_t addr)
continue;
}
- /*
- * This index is bogus, but out of the way
- */
- nkpg = vm_page_alloc(NULL, nkpt,
- VM_ALLOC_NOOBJ | VM_ALLOC_SYSTEM | VM_ALLOC_WIRED);
- if (!nkpg)
+ nkpg = vm_page_alloc(NULL, kernel_vm_end >> PDRSHIFT,
+ VM_ALLOC_INTERRUPT | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED |
+ VM_ALLOC_ZERO);
+ if (nkpg == NULL)
panic("pmap_growkernel: no memory to grow kernel");
nkpt++;
- pmap_zero_page(nkpg);
+ if ((nkpg->flags & PG_ZERO) == 0)
+ pmap_zero_page(nkpg);
ptppaddr = VM_PAGE_TO_PHYS(nkpg);
newpdir = (pd_entry_t) (ptppaddr | PG_V | PG_RW | PG_A | PG_M);
vm_page_lock_queues();
@@ -1891,7 +1900,7 @@ pmap_growkernel(vm_offset_t addr)
mtx_unlock_spin(&allpmaps_lock);
vm_page_unlock_queues();
- kernel_vm_end = (kernel_vm_end + PAGE_SIZE * NPTEPG) & ~(PAGE_SIZE * NPTEPG - 1);
+ kernel_vm_end = (kernel_vm_end + NBPDR) & ~PDRMASK;
if (kernel_vm_end - 1 >= kernel_map->max_offset) {
kernel_vm_end = kernel_map->max_offset;
break;
@@ -1911,7 +1920,7 @@ static __inline struct pv_chunk *
pv_to_chunk(pv_entry_t pv)
{
- return (struct pv_chunk *)((uintptr_t)pv & ~(uintptr_t)PAGE_MASK);
+ return ((struct pv_chunk *)((uintptr_t)pv & ~(uintptr_t)PAGE_MASK));
}
#define PV_PMAP(pv) (pv_to_chunk(pv)->pc_pmap)
@@ -2033,15 +2042,15 @@ free_pv_entry(pmap_t pmap, pv_entry_t pv)
pc->pc_map[field] |= 1ul << bit;
/* move to head of list */
TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- TAILQ_INSERT_HEAD(&pmap->pm_pvchunk, pc, pc_list);
for (idx = 0; idx < _NPCM; idx++)
- if (pc->pc_map[idx] != pc_freemask[idx])
+ if (pc->pc_map[idx] != pc_freemask[idx]) {
+ TAILQ_INSERT_HEAD(&pmap->pm_pvchunk, pc, pc_list);
return;
+ }
PV_STAT(pv_entry_spare -= _NPCPV);
PV_STAT(pc_chunk_count--);
PV_STAT(pc_chunk_frees++);
/* entire chunk is free, return it */
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)pc));
pmap_qremove((vm_offset_t)pc, 1);
vm_page_unwire(m, 0);
@@ -2270,10 +2279,10 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offse
pt_entry_t *pte;
vm_page_t free = NULL;
int anyvalid;
-
+
CTR3(KTR_PMAP, "pmap_remove: pmap=%p sva=0x%x eva=0x%x",
pmap, sva, eva);
-
+
/*
* Perform an unsynchronized read. This is, however, safe.
*/
@@ -2298,7 +2307,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offse
}
for (; sva < eva; sva = pdnxt) {
- unsigned pdirindex;
+ u_int pdirindex;
/*
* Calculate index for next page table.
@@ -2393,7 +2402,6 @@ pmap_remove_all(vm_page_t m)
PMAP_LOCK(pmap);
pmap->pm_stats.resident_count--;
pte = pmap_pte_quick(pmap, pv->pv_va);
-
tpte = *pte;
PT_SET_VA_MA(pte, 0, TRUE);
if (tpte & PG_W)
@@ -2457,7 +2465,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offs
PMAP_LOCK(pmap);
for (; sva < eva; sva = pdnxt) {
pt_entry_t obits, pbits;
- unsigned pdirindex;
+ u_int pdirindex;
pdnxt = (sva + NBPDR) & ~PDRMASK;
@@ -2569,7 +2577,8 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_prot_t
KASSERT(va < UPT_MIN_ADDRESS || va >= UPT_MAX_ADDRESS,
("pmap_enter: invalid to pmap_enter page table pages (va: 0x%x)",
va));
- KASSERT((m->oflags & (VPO_UNMANAGED | VPO_BUSY)) != 0,
+ KASSERT((m->oflags & (VPO_UNMANAGED | VPO_BUSY)) != 0 ||
+ VM_OBJECT_LOCKED(m->object),
("pmap_enter: page %p is not busy", m));
mpte = NULL;
@@ -2772,10 +2781,9 @@ pmap_enter_object(pmap_t pmap, vm_offset_t start,
multicall_entry_t mcl[16];
multicall_entry_t *mclp = mcl;
int error, count = 0;
-
+
VM_OBJECT_LOCK_ASSERT(m_start->object, MA_OWNED);
psize = atop(end - start);
-
mpte = NULL;
m = m_start;
vm_page_lock_queues();
@@ -2814,7 +2822,7 @@ pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_p
multicall_entry_t mcl, *mclp;
int count = 0;
mclp = &mcl;
-
+
CTR4(KTR_PMAP, "pmap_enter_quick: pmap=%p va=0x%x m=%p prot=0x%x",
pmap, va, m, prot);
@@ -2865,7 +2873,7 @@ pmap_enter_quick_locked(multicall_entry_t **mclpp,
vm_paddr_t pa;
vm_page_t free;
multicall_entry_t *mcl = *mclpp;
-
+
KASSERT(va < kmi.clean_sva || va >= kmi.clean_eva ||
(m->oflags & VPO_UNMANAGED) != 0,
("pmap_enter_quick_locked: managed mapping within the clean submap"));
@@ -2877,7 +2885,7 @@ pmap_enter_quick_locked(multicall_entry_t **mclpp,
* resident, we are creating it here.
*/
if (va < VM_MAXUSER_ADDRESS) {
- unsigned ptepindex;
+ u_int ptepindex;
pd_entry_t ptema;
/*
@@ -2981,7 +2989,7 @@ pmap_enter_quick_locked(multicall_entry_t **mclpp,
*mclpp = mcl + 1;
*count = *count + 1;
#endif
- return mpte;
+ return (mpte);
}
/*
@@ -3006,9 +3014,8 @@ pmap_kenter_temporary(vm_paddr_t pa, int i)
* are taken, but the code works.
*/
void
-pmap_object_init_pt(pmap_t pmap, vm_offset_t addr,
- vm_object_t object, vm_pindex_t pindex,
- vm_size_t size)
+pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object,
+ vm_pindex_t pindex, vm_size_t size)
{
pd_entry_t *pde;
vm_paddr_t pa, ptepa;
@@ -3026,6 +3033,7 @@ void
KASSERT(p->valid == VM_PAGE_BITS_ALL,
("pmap_object_init_pt: invalid page %p", p));
pat_mode = p->md.pat_mode;
+
/*
* Abort the mapping if the first page is not physically
* aligned to a 2/4MB page boundary.
@@ -3033,6 +3041,7 @@ void
ptepa = VM_PAGE_TO_PHYS(p);
if (ptepa & (NBPDR - 1))
return;
+
/*
* Skip the first page. Abort the mapping if the rest of
* the pages are not physically contiguous or have differing
@@ -3048,7 +3057,12 @@ void
return;
p = TAILQ_NEXT(p, listq);
}
- /* Map using 2/4MB pages. */
+
+ /*
+ * Map using 2/4MB pages. Since "ptepa" is 2/4M aligned and
+ * "size" is a multiple of 2/4M, adding the PAT setting to
+ * "pa" will not affect the termination of this loop.
+ */
PMAP_LOCK(pmap);
for (pa = ptepa | pmap_cache_bits(pat_mode, 1); pa < ptepa +
size; pa += NBPDR) {
@@ -3112,7 +3126,7 @@ pmap_change_wiring(pmap_t pmap, vm_offset_t va, bo
void
pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len,
- vm_offset_t src_addr)
+ vm_offset_t src_addr)
{
vm_page_t free;
vm_offset_t addr;
@@ -3149,7 +3163,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_off
pt_entry_t *src_pte, *dst_pte;
vm_page_t dstmpte, srcmpte;
pd_entry_t srcptepaddr;
- unsigned ptepindex;
+ u_int ptepindex;
KASSERT(addr < UPT_MIN_ADDRESS,
("pmap_copy: invalid to pmap_copy page tables"));
@@ -3188,7 +3202,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_off
dstmpte = pmap_allocpte(dst_pmap, addr,
M_NOWAIT);
if (dstmpte == NULL)
- break;
+ goto out;
dst_pte = pmap_pte_quick(dst_pmap, addr);
if (*dst_pte == 0 &&
pmap_try_insert_pv_entry(dst_pmap, addr,
@@ -3212,6 +3226,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_off
addr);
pmap_free_zero_pages(free);
}
+ goto out;
}
if (dstmpte->wire_count >= srcmpte->wire_count)
break;
@@ -3220,6 +3235,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_off
src_pte++;
}
}
+out:
PT_UPDATES_FLUSH();
sched_unpin();
vm_page_unlock_queues();
@@ -3282,7 +3298,7 @@ pmap_zero_page_area(vm_page_t m, int off, int size
sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
mtx_lock(&sysmaps->lock);
if (*sysmaps->CMAP2)
- panic("pmap_zero_page: CMAP2 busy");
+ panic("pmap_zero_page_area: CMAP2 busy");
sched_pin();
PT_SET_MA(sysmaps->CADDR2, PG_V | PG_RW | VM_PAGE_TO_MACH(m) | PG_A | PG_M);
@@ -3306,7 +3322,7 @@ pmap_zero_page_idle(vm_page_t m)
{
if (*CMAP3)
- panic("pmap_zero_page: CMAP3 busy");
+ panic("pmap_zero_page_idle: CMAP3 busy");
sched_pin();
PT_SET_MA(CADDR3, PG_V | PG_RW | VM_PAGE_TO_MACH(m) | PG_A | PG_M);
pagezero(CADDR3);
@@ -3770,7 +3786,6 @@ pmap_ts_referenced(vm_page_t m)
PT_UPDATES_FLUSH();
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
-
sched_unpin();
vm_page_unlock_queues();
return (rtval);
@@ -3805,7 +3820,7 @@ pmap_clear_modify(vm_page_t m)
pmap = PV_PMAP(pv);
PMAP_LOCK(pmap);
pte = pmap_pte_quick(pmap, pv->pv_va);
- if ((*pte & PG_M) != 0) {
+ if ((*pte & (PG_M | PG_RW)) == (PG_M | PG_RW)) {
/*
* Regardless of whether a pte is 32 or 64 bits
* in size, PG_M is among the least significant
@@ -3927,8 +3942,6 @@ pmap_unmapdev(vm_offset_t va, vm_size_t size)
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)
@@ -3951,11 +3964,21 @@ pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma
* invalidation. In the worst case, whole cache is flushed by
* pmap_invalidate_cache_range().
*/
- if ((cpu_feature & (CPUID_SS|CPUID_CLFSH)) == CPUID_CLFSH) {
+ if ((cpu_feature & CPUID_SS) == 0)
+ pmap_flush_page(m);
+}
+
+static void
+pmap_flush_page(vm_page_t m)
+{
+ struct sysmaps *sysmaps;
+ vm_offset_t sva, eva;
+
+ if ((cpu_feature & CPUID_CLFSH) != 0) {
sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
mtx_lock(&sysmaps->lock);
if (*sysmaps->CMAP2)
- panic("pmap_page_set_memattr: CMAP2 busy");
+ panic("pmap_flush_page: CMAP2 busy");
sched_pin();
PT_SET_MA(sysmaps->CADDR2, PG_V | PG_RW |
VM_PAGE_TO_MACH(m) | PG_A | PG_M |
@@ -3963,21 +3986,35 @@ pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma
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) {
+
+ /*
+ * Use mfence despite the ordering implied by
+ * mtx_{un,}lock() because clflush is not guaranteed
+ * to be ordered by any other instruction.
+ */
+ mfence();
+ for (; sva < eva; sva += cpu_clflush_line_size)
+ clflush(sva);
+ mfence();
PT_SET_MA(sysmaps->CADDR2, 0);
sched_unpin();
mtx_unlock(&sysmaps->lock);
- }
+ } else
+ pmap_invalidate_cache();
}
+/*
+ * Changes the specified virtual address range's memory type to that given by
+ * the parameter "mode". The specified virtual address range must be
+ * completely contained within either the kernel map.
+ *
+ * Returns zero if the change completed successfully, and either EINVAL or
+ * ENOMEM if the change failed. Specifically, EINVAL is returned if some part
+ * of the virtual address range was not mapped, and ENOMEM is returned if
+ * there was insufficient memory available to complete the change.
+ */
int
-pmap_change_attr(va, size, mode)
- vm_offset_t va;
- vm_size_t size;
- int mode;
+pmap_change_attr(vm_offset_t va, vm_size_t size, int mode)
{
vm_offset_t base, offset, tmpva;
pt_entry_t *pte;
@@ -4031,8 +4068,8 @@ int
}
/*
- * Flush CPU caches to make sure any data isn't cached that shouldn't
- * be, etc.
+ * Flush CPU caches to make sure any data isn't cached that
+ * shouldn't be, etc.
*/
if (changed) {
pmap_invalidate_range(kernel_pmap, base, tmpva);
@@ -4050,7 +4087,7 @@ pmap_mincore(pmap_t pmap, vm_offset_t addr, vm_pad
pt_entry_t *ptep, pte;
vm_paddr_t pa;
int val;
-
+
PMAP_LOCK(pmap);
retry:
ptep = pmap_pte(pmap, addr);
@@ -4233,7 +4270,7 @@ pmap_pid_dump(int pid)
printf("\n");
}
sx_sunlock(&allproc_lock);
- return npte;
+ return (npte);
}
pte = pmap_pte(pmap, va);
if (pte && pmap_pte_v(pte)) {
@@ -4258,7 +4295,7 @@ pmap_pid_dump(int pid)
}
}
sx_sunlock(&allproc_lock);
- return npte;
+ return (npte);
}
#endif
More information about the freebsd-xen
mailing list