git: 16597773bc90 - main - arm64: Add ADDR_IS_USER
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Date: Wed, 06 Aug 2025 17:37:59 UTC
The branch main has been updated by andrew:
URL: https://cgit.FreeBSD.org/src/commit/?id=16597773bc905086f5682c906bb44c51b3ac2c5a
commit 16597773bc905086f5682c906bb44c51b3ac2c5a
Author: Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2025-07-31 13:59:59 +0000
Commit: Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2025-07-31 14:27:06 +0000
arm64: Add ADDR_IS_USER
In most of the places we used ADDR_IS_KERNEL to decide which address
space was being used it was to see if the address was for userspace.
To make the checks more descriptive add ADDR_IS_USER rather than
checking for not ADDR_IS_KERNEL.
Reviewed by: alc, kib, markj
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D51406
---
sys/arm64/arm64/pmap.c | 32 ++++++++++++++++----------------
sys/arm64/include/vmparam.h | 2 ++
2 files changed, 18 insertions(+), 16 deletions(-)
diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
index 2152f7fcc1c6..07955866bd1c 100644
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -2915,13 +2915,13 @@ retry:
l1 = pmap_l1(pmap, va);
if (l1 != NULL && (pmap_load(l1) & ATTR_DESCR_MASK) == L1_TABLE) {
l2 = pmap_l1_to_l2(l1, va);
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
/* Add a reference to the L2 page. */
l2pg = PTE_TO_VM_PAGE(pmap_load(l1));
l2pg->ref_count++;
} else
l2pg = NULL;
- } else if (!ADDR_IS_KERNEL(va)) {
+ } else if (ADDR_IS_USER(va)) {
/* Allocate a L2 page. */
l2pindex = pmap_l2_pindex(va) >> Ln_ENTRIES_SHIFT;
l2pg = _pmap_alloc_l3(pmap, NUL2E + l2pindex, lockp);
@@ -4082,7 +4082,7 @@ pmap_remove_l3_range(pmap_t pmap, pd_entry_t l2e, vm_offset_t sva,
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
KASSERT(rounddown2(sva, L2_SIZE) + L2_SIZE == roundup2(eva, L2_SIZE),
("pmap_remove_l3_range: range crosses an L3 page table boundary"));
- l3pg = !ADDR_IS_KERNEL(sva) ? PTE_TO_VM_PAGE(l2e) : NULL;
+ l3pg = ADDR_IS_USER(sva) ? PTE_TO_VM_PAGE(l2e) : NULL;
va = eva;
for (l3 = pmap_l2_to_l3(&l2e, sva); sva != eva; l3++, sva += L3_SIZE) {
old_l3 = pmap_load(l3);
@@ -5310,7 +5310,7 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
if ((flags & PMAP_ENTER_WIRED) != 0)
new_l3 |= ATTR_SW_WIRED;
if (pmap->pm_stage == PM_STAGE1) {
- if (!ADDR_IS_KERNEL(va))
+ if (ADDR_IS_USER(va))
new_l3 |= ATTR_S1_AP(ATTR_S1_AP_USER) | ATTR_S1_PXN;
else
new_l3 |= ATTR_S1_UXN;
@@ -5401,7 +5401,7 @@ retry:
pde = pmap_pde(pmap, va, &lvl);
if (pde != NULL && lvl == 2) {
l3 = pmap_l2_to_l3(pde, va);
- if (!ADDR_IS_KERNEL(va) && mpte == NULL) {
+ if (ADDR_IS_USER(va) && mpte == NULL) {
mpte = PTE_TO_VM_PAGE(pmap_load(pde));
mpte->ref_count++;
}
@@ -5411,7 +5411,7 @@ retry:
if ((pmap_load(l2) & ATTR_DESCR_MASK) == L2_BLOCK &&
(l3 = pmap_demote_l2_locked(pmap, l2, va, &lock)) != NULL) {
l3 = &l3[pmap_l3_index(va)];
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
mpte = PTE_TO_VM_PAGE(pmap_load(l2));
mpte->ref_count++;
}
@@ -5419,7 +5419,7 @@ retry:
}
/* We need to allocate an L3 table. */
}
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
nosleep = (flags & PMAP_ENTER_NOSLEEP) != 0;
/*
@@ -5657,7 +5657,7 @@ pmap_enter_l2_rx(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
if ((prot & VM_PROT_EXECUTE) == 0 ||
m->md.pv_memattr == VM_MEMATTR_DEVICE)
new_l2 |= ATTR_S1_XN;
- if (!ADDR_IS_KERNEL(va))
+ if (ADDR_IS_USER(va))
new_l2 |= ATTR_S1_AP(ATTR_S1_AP_USER) | ATTR_S1_PXN;
else
new_l2 |= ATTR_S1_UXN;
@@ -5745,7 +5745,7 @@ pmap_enter_l2(pmap_t pmap, vm_offset_t va, pd_entry_t new_l2, u_int flags,
"pmap_enter_l2: no space for va %#lx"
" in pmap %p", va, pmap);
return (KERN_NO_SPACE);
- } else if (!ADDR_IS_KERNEL(va) ||
+ } else if (ADDR_IS_USER(va) ||
!pmap_every_pte_zero(PTE_TO_PHYS(old_l2))) {
if (l2pg != NULL)
l2pg->ref_count--;
@@ -5796,7 +5796,7 @@ pmap_enter_l2(pmap_t pmap, vm_offset_t va, pd_entry_t new_l2, u_int flags,
}
KASSERT(pmap_load(l2) == 0,
("pmap_enter_l2: non-zero L2 entry %p", l2));
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
vm_page_free_pages_toq(&free, true);
} else {
KASSERT(SLIST_EMPTY(&free),
@@ -5916,7 +5916,7 @@ pmap_enter_l3c_rx(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_page_t *ml3p,
if ((prot & VM_PROT_EXECUTE) == 0 ||
m->md.pv_memattr == VM_MEMATTR_DEVICE)
l3e |= ATTR_S1_XN;
- if (!ADDR_IS_KERNEL(va))
+ if (ADDR_IS_USER(va))
l3e |= ATTR_S1_AP(ATTR_S1_AP_USER) | ATTR_S1_PXN;
else
l3e |= ATTR_S1_UXN;
@@ -5948,7 +5948,7 @@ pmap_enter_l3c(pmap_t pmap, vm_offset_t va, pt_entry_t l3e, u_int flags,
/*
* If the L3 PTP is not resident, we attempt to create it here.
*/
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
/*
* Were we given the correct L3 PTP? If so, we can simply
* increment its ref count.
@@ -6224,7 +6224,7 @@ pmap_enter_quick_locked(pmap_t pmap, vm_offset_t va, vm_page_t m,
* In the case that a page table page is not
* resident, we are creating it here.
*/
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
vm_pindex_t l2pindex;
/*
@@ -6310,7 +6310,7 @@ pmap_enter_quick_locked(pmap_t pmap, vm_offset_t va, vm_page_t m,
if ((prot & VM_PROT_EXECUTE) == 0 ||
m->md.pv_memattr == VM_MEMATTR_DEVICE)
l3_val |= ATTR_S1_XN;
- if (!ADDR_IS_KERNEL(va))
+ if (ADDR_IS_USER(va))
l3_val |= ATTR_S1_AP(ATTR_S1_AP_USER) | ATTR_S1_PXN;
else
l3_val |= ATTR_S1_UXN;
@@ -8528,7 +8528,7 @@ pmap_demote_l2_locked(pmap_t pmap, pt_entry_t *l2, vm_offset_t va,
* region and early kernel memory are the only parts of the
* kernel address space that must be handled here.
*/
- KASSERT(!ADDR_IS_KERNEL(va) || VIRT_IN_DMAP(va) ||
+ KASSERT(ADDR_IS_USER(va) || VIRT_IN_DMAP(va) ||
(va >= VM_MIN_KERNEL_ADDRESS && va < kernel_vm_end),
("pmap_demote_l2: No saved mpte for va %#lx", va));
@@ -8555,7 +8555,7 @@ pmap_demote_l2_locked(pmap_t pmap, pt_entry_t *l2, vm_offset_t va,
}
ml3->pindex = pmap_l2_pindex(va);
- if (!ADDR_IS_KERNEL(va)) {
+ if (ADDR_IS_USER(va)) {
ml3->ref_count = NL3PG;
pmap_resident_count_inc(pmap, 1);
}
diff --git a/sys/arm64/include/vmparam.h b/sys/arm64/include/vmparam.h
index 349849845e73..db3af1881282 100644
--- a/sys/arm64/include/vmparam.h
+++ b/sys/arm64/include/vmparam.h
@@ -213,6 +213,8 @@
/* If true addr is in the kernel address space */
#define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55))
+/* If true addr is in the user address space */
+#define ADDR_IS_USER(addr) (((addr) & (1ul << 55)) == 0)
/* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */
#define ADDR_IS_CANONICAL(addr) \
(((addr) & 0xffff000000000000UL) == 0 || \