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[src/trunk]: src/sys/arch/aarch64 add support pmap_pv(9)
details: https://anonhg.NetBSD.org/src/rev/75abf4e3072f
branches: trunk
changeset: 968984:75abf4e3072f
user: ryo <ryo%NetBSD.org@localhost>
date: Mon Feb 03 13:37:01 2020 +0000
description:
add support pmap_pv(9)
Patch originally from jmcneill@. thanks
diffstat:
sys/arch/aarch64/aarch64/pmap.c | 106 +++++++++++++++++++++++++++++------
sys/arch/aarch64/conf/files.aarch64 | 4 +-
sys/arch/aarch64/include/pmap.h | 9 ++-
3 files changed, 97 insertions(+), 22 deletions(-)
diffs (254 lines):
diff -r f2b060568d0e -r 75abf4e3072f sys/arch/aarch64/aarch64/pmap.c
--- a/sys/arch/aarch64/aarch64/pmap.c Mon Feb 03 13:35:44 2020 +0000
+++ b/sys/arch/aarch64/aarch64/pmap.c Mon Feb 03 13:37:01 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.62 2020/02/03 13:35:44 ryo Exp $ */
+/* $NetBSD: pmap.c,v 1.63 2020/02/03 13:37:01 ryo Exp $ */
/*
* Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.62 2020/02/03 13:35:44 ryo Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.63 2020/02/03 13:37:01 ryo Exp $");
#include "opt_arm_debug.h"
#include "opt_ddb.h"
@@ -43,6 +43,7 @@
#include <sys/asan.h>
#include <uvm/uvm.h>
+#include <uvm/pmap/pmap_pvt.h>
#include <aarch64/pmap.h>
#include <aarch64/pte.h>
@@ -116,6 +117,7 @@
PMAP_COUNTER(protect_none, "pmap_protect non-exists pages");
PMAP_COUNTER(protect_managed, "pmap_protect managed pages");
PMAP_COUNTER(protect_unmanaged, "pmap_protect unmanaged pages");
+PMAP_COUNTER(protect_pvmanaged, "pmap_protect pv-tracked unmanaged pages");
PMAP_COUNTER(clear_modify, "pmap_clear_modify call");
PMAP_COUNTER(clear_modify_pages, "pmap_clear_modify pages");
@@ -135,6 +137,7 @@
PMAP_COUNTER(kern_mappings_changed, "kernel mapping changed");
PMAP_COUNTER(uncached_mappings, "uncached pages mapped");
PMAP_COUNTER(unmanaged_mappings, "unmanaged pages mapped");
+PMAP_COUNTER(pvmanaged_mappings, "pv-tracked unmanaged pages mapped");
PMAP_COUNTER(managed_mappings, "managed pages mapped");
PMAP_COUNTER(mappings, "pages mapped (including remapped)");
PMAP_COUNTER(remappings, "pages remapped");
@@ -245,6 +248,12 @@
mutex_exit(&pm->pm_lock);
}
+static inline void
+_pmap_page_init(struct pmap_page *pp)
+{
+ mutex_init(&pp->pp_pvlock, MUTEX_SPIN, IPL_VM);
+}
+
static inline struct pmap_page *
phys_to_pp(paddr_t pa)
{
@@ -254,7 +263,17 @@
if (pg != NULL)
return VM_PAGE_TO_PP(pg);
+#ifdef __HAVE_PMAP_PV_TRACK
+ struct pmap_page *pp = pmap_pv_tracked(pa);
+ if (pp != NULL && (pp->pp_flags & PMAP_PAGE_FLAGS_PV_TRACKED) == 0) {
+ /* XXX: initialize pv_tracked pmap_page. should not init here */
+ _pmap_page_init(pp);
+ pp->pp_flags |= PMAP_PAGE_FLAGS_PV_TRACKED;
+ }
+ return pp;
+#else
return NULL;
+#endif /* __HAVE_PMAP_PV_TRACK */
}
#define IN_RANGE(va,sta,end) (((sta) <= (va)) && ((va) < (end)))
@@ -538,7 +557,7 @@
pfn++) {
pg = PHYS_TO_VM_PAGE(ptoa(pfn));
md = VM_PAGE_TO_MD(pg);
- mutex_init(&md->mdpg_pp.pp_pvlock, MUTEX_SPIN, IPL_VM);
+ _pmap_page_init(&md->mdpg_pp);
}
}
}
@@ -1284,8 +1303,18 @@
pp = VM_PAGE_TO_PP(pg);
PMAP_COUNT(protect_managed);
} else {
+#ifdef __HAVE_PMAP_PV_TRACK
+ pp = pmap_pv_tracked(pa);
+#ifdef PMAPCOUNTERS
+ if (pp != NULL)
+ PMAP_COUNT(protect_pvmanaged);
+ else
+ PMAP_COUNT(protect_unmanaged);
+#endif
+#else
pp = NULL;
PMAP_COUNT(protect_unmanaged);
+#endif /* __HAVE_PMAP_PV_TRACK */
}
if (pp != NULL) {
@@ -1621,8 +1650,18 @@
pp = VM_PAGE_TO_PP(pg);
PMAP_COUNT(managed_mappings);
} else {
+#ifdef __HAVE_PMAP_PV_TRACK
+ pp = pmap_pv_tracked(pa);
+#ifdef PMAPCOUNTERS
+ if (pp != NULL)
+ PMAP_COUNT(pvmanaged_mappings);
+ else
+ PMAP_COUNT(unmanaged_mappings);
+#endif
+#else
pp = NULL;
PMAP_COUNT(unmanaged_mappings);
+#endif /* __HAVE_PMAP_PV_TRACK */
}
}
@@ -1995,26 +2034,13 @@
}
}
-void
-pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
+static void
+pmap_page_remove(struct pmap_page *pp, vm_prot_t prot)
{
- struct pmap_page *pp = VM_PAGE_TO_PP(pg);
struct pv_entry *pv, *pvtmp;
+ struct pv_entry *pvtofree = NULL;
pt_entry_t opte;
- KASSERT((prot & VM_PROT_READ) || !(prot & VM_PROT_WRITE));
-
- UVMHIST_FUNC(__func__);
- UVMHIST_CALLED(pmaphist);
-
- UVMHIST_LOG(pmaphist, "pg=%p, pp=%p, pa=%016lx, prot=%08x",
- pg, pp, VM_PAGE_TO_PHYS(pg), prot);
-
-
- if ((prot & (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)) ==
- VM_PROT_NONE) {
- struct pv_entry *pvtofree = NULL;
-
/* remove all pages reference to this physical page */
pmap_pv_lock(pp);
TAILQ_FOREACH_SAFE(pv, &pp->pp_pvhead, pv_link, pvtmp) {
@@ -2044,6 +2070,48 @@
pvtmp = pv->pv_next;
pool_cache_put(&_pmap_pv_pool, pv);
}
+}
+
+#ifdef __HAVE_PMAP_PV_TRACK
+void
+pmap_pv_protect(paddr_t pa, vm_prot_t prot)
+{
+ struct pmap_page *pp;
+
+ UVMHIST_FUNC(__func__);
+ UVMHIST_CALLED(pmaphist);
+
+ UVMHIST_LOG(pmaphist, "pa=%016lx, prot=%08x",
+ pa, prot, 0, 0);
+
+ pp = pmap_pv_tracked(pa);
+ if (pp == NULL)
+ panic("pmap_pv_protect: page not pv-tracked: %#" PRIxPADDR, pa);
+
+ KASSERT(prot == VM_PROT_NONE);
+ pmap_page_remove(pp, prot);
+}
+#endif
+
+void
+pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
+{
+ struct pv_entry *pv;
+ struct pmap_page *pp;
+
+ KASSERT((prot & VM_PROT_READ) || !(prot & VM_PROT_WRITE));
+
+ UVMHIST_FUNC(__func__);
+ UVMHIST_CALLED(pmaphist);
+
+ pp = VM_PAGE_TO_PP(pg);
+
+ UVMHIST_LOG(pmaphist, "pg=%p, pp=%p, pa=%016lx, prot=%08x",
+ pg, pp, VM_PAGE_TO_PHYS(pg), prot);
+
+ if ((prot & (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)) ==
+ VM_PROT_NONE) {
+ pmap_page_remove(pp, prot);
} else {
pmap_pv_lock(pp);
TAILQ_FOREACH(pv, &pp->pp_pvhead, pv_link) {
diff -r f2b060568d0e -r 75abf4e3072f sys/arch/aarch64/conf/files.aarch64
--- a/sys/arch/aarch64/conf/files.aarch64 Mon Feb 03 13:35:44 2020 +0000
+++ b/sys/arch/aarch64/conf/files.aarch64 Mon Feb 03 13:37:01 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.aarch64,v 1.18 2020/01/21 04:54:11 skrll Exp $
+# $NetBSD: files.aarch64,v 1.19 2020/02/03 13:37:01 ryo Exp $
defflag opt_cpuoptions.h AARCH64_ALIGNMENT_CHECK
defflag opt_cpuoptions.h AARCH64_EL0_STACK_ALIGNMENT_CHECK
@@ -114,7 +114,7 @@
file arch/aarch64/aarch64/pmap.c
file arch/aarch64/aarch64/pmapboot.c
file arch/aarch64/aarch64/pmap_page.S
-#file uvm/pmap/pmap_pvt.c
+file uvm/pmap/pmap_pvt.c
# EFI runtime (machdep)
file arch/aarch64/aarch64/efi_machdep.c efi_runtime
diff -r f2b060568d0e -r 75abf4e3072f sys/arch/aarch64/include/pmap.h
--- a/sys/arch/aarch64/include/pmap.h Mon Feb 03 13:35:44 2020 +0000
+++ b/sys/arch/aarch64/include/pmap.h Mon Feb 03 13:37:01 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.h,v 1.32 2020/02/03 13:35:44 ryo Exp $ */
+/* $NetBSD: pmap.h,v 1.33 2020/02/03 13:37:01 ryo Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -51,6 +51,7 @@
#define PMAP_STEAL_MEMORY
#define __HAVE_VM_PAGE_MD
+#define __HAVE_PMAP_PV_TRACK 1
#ifndef KASAN
#define PMAP_MAP_POOLPAGE(pa) AARCH64_PA_TO_KVA(pa)
@@ -90,6 +91,7 @@
/* VM_PROT_READ means referenced, VM_PROT_WRITE means modified */
uint32_t pp_flags;
+#define PMAP_PAGE_FLAGS_PV_TRACKED 0x80000000
};
struct vm_page_md {
@@ -287,6 +289,11 @@
bool pmap_extract_coherency(pmap_t, vaddr_t, paddr_t *, bool *);
void pmap_icache_sync_range(pmap_t, vaddr_t, vaddr_t);
+void pmap_pv_init(void);
+void pmap_pv_track(paddr_t, psize_t);
+void pmap_pv_untrack(paddr_t, psize_t);
+void pmap_pv_protect(paddr_t, vm_prot_t);
+
#define PMAP_MAPSIZE1 L2_SIZE
#endif /* _KERNEL */
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