Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 37508b1..b7eaf65 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <linux/mm.h>
@@ -37,17 +37,19 @@
} mprotect;
} u;
} ops[1];
+ int userspace;
int index;
- struct mm_id *id;
+ struct mm_struct *mm;
void *data;
int force;
};
-#define INIT_HVC(mm, force) \
+#define INIT_HVC(mm, force, userspace) \
((struct host_vm_change) \
{ .ops = { { .type = NONE } }, \
- .id = &mm->context.id, \
+ .mm = mm, \
.data = NULL, \
+ .userspace = userspace, \
.index = 0, \
.force = force })
@@ -68,18 +70,40 @@
op = &hvc->ops[i];
switch (op->type) {
case MMAP:
- ret = map(hvc->id, op->u.mmap.addr, op->u.mmap.len,
- op->u.mmap.prot, op->u.mmap.fd,
- op->u.mmap.offset, finished, &hvc->data);
+ if (hvc->userspace)
+ ret = map(&hvc->mm->context.id, op->u.mmap.addr,
+ op->u.mmap.len, op->u.mmap.prot,
+ op->u.mmap.fd,
+ op->u.mmap.offset, finished,
+ &hvc->data);
+ else
+ map_memory(op->u.mmap.addr, op->u.mmap.offset,
+ op->u.mmap.len, 1, 1, 1);
break;
case MUNMAP:
- ret = unmap(hvc->id, op->u.munmap.addr,
- op->u.munmap.len, finished, &hvc->data);
+ if (hvc->userspace)
+ ret = unmap(&hvc->mm->context.id,
+ op->u.munmap.addr,
+ op->u.munmap.len, finished,
+ &hvc->data);
+ else
+ ret = os_unmap_memory(
+ (void *) op->u.munmap.addr,
+ op->u.munmap.len);
+
break;
case MPROTECT:
- ret = protect(hvc->id, op->u.mprotect.addr,
- op->u.mprotect.len, op->u.mprotect.prot,
- finished, &hvc->data);
+ if (hvc->userspace)
+ ret = protect(&hvc->mm->context.id,
+ op->u.mprotect.addr,
+ op->u.mprotect.len,
+ op->u.mprotect.prot,
+ finished, &hvc->data);
+ else
+ ret = os_protect_memory(
+ (void *) op->u.mprotect.addr,
+ op->u.mprotect.len,
+ 1, 1, 1);
break;
default:
printk(KERN_ERR "Unknown op type %d in do_ops\n",
@@ -100,9 +124,12 @@
{
__u64 offset;
struct host_vm_op *last;
- int fd, ret = 0;
+ int fd = -1, ret = 0;
- fd = phys_mapping(phys, &offset);
+ if (hvc->userspace)
+ fd = phys_mapping(phys, &offset);
+ else
+ offset = phys;
if (hvc->index != 0) {
last = &hvc->ops[hvc->index - 1];
if ((last->type == MMAP) &&
@@ -215,10 +242,11 @@
prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) |
(x ? UM_PROT_EXEC : 0));
if (hvc->force || pte_newpage(*pte)) {
- if (pte_present(*pte))
- ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
- PAGE_SIZE, prot, hvc);
- else
+ if (pte_present(*pte)) {
+ if (pte_newpage(*pte))
+ ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
+ PAGE_SIZE, prot, hvc);
+ } else
ret = add_munmap(addr, PAGE_SIZE, hvc);
} else if (pte_newprot(*pte))
ret = add_mprotect(addr, PAGE_SIZE, prot, hvc);
@@ -277,9 +305,9 @@
pgd_t *pgd;
struct host_vm_change hvc;
unsigned long addr = start_addr, next;
- int ret = 0;
+ int ret = 0, userspace = 1;
- hvc = INIT_HVC(mm, force);
+ hvc = INIT_HVC(mm, force, userspace);
pgd = pgd_offset(mm, addr);
do {
next = pgd_addr_end(addr, end_addr);
@@ -301,7 +329,7 @@
"process: %d\n", task_tgid_vnr(current));
/* We are under mmap_sem, release it such that current can terminate */
up_write(¤t->mm->mmap_sem);
- force_sig(SIGKILL, current);
+ force_sig(SIGKILL);
do_signal(¤t->thread.regs);
}
}
@@ -314,9 +342,11 @@
pmd_t *pmd;
pte_t *pte;
unsigned long addr, last;
- int updated = 0, err;
+ int updated = 0, err = 0, force = 0, userspace = 0;
+ struct host_vm_change hvc;
mm = &init_mm;
+ hvc = INIT_HVC(mm, force, userspace);
for (addr = start; addr < end;) {
pgd = pgd_offset(mm, addr);
if (!pgd_present(*pgd)) {
@@ -325,8 +355,7 @@
last = end;
if (pgd_newpage(*pgd)) {
updated = 1;
- err = os_unmap_memory((void *) addr,
- last - addr);
+ err = add_munmap(addr, last - addr, &hvc);
if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
@@ -342,8 +371,7 @@
last = end;
if (pud_newpage(*pud)) {
updated = 1;
- err = os_unmap_memory((void *) addr,
- last - addr);
+ err = add_munmap(addr, last - addr, &hvc);
if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
@@ -359,8 +387,7 @@
last = end;
if (pmd_newpage(*pmd)) {
updated = 1;
- err = os_unmap_memory((void *) addr,
- last - addr);
+ err = add_munmap(addr, last - addr, &hvc);
if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
@@ -372,22 +399,25 @@
pte = pte_offset_kernel(pmd, addr);
if (!pte_present(*pte) || pte_newpage(*pte)) {
updated = 1;
- err = os_unmap_memory((void *) addr,
- PAGE_SIZE);
+ err = add_munmap(addr, PAGE_SIZE, &hvc);
if (err < 0)
panic("munmap failed, errno = %d\n",
-err);
if (pte_present(*pte))
- map_memory(addr,
- pte_val(*pte) & PAGE_MASK,
- PAGE_SIZE, 1, 1, 1);
+ err = add_mmap(addr, pte_val(*pte) & PAGE_MASK,
+ PAGE_SIZE, 0, &hvc);
}
else if (pte_newprot(*pte)) {
updated = 1;
- os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1);
+ err = add_mprotect(addr, PAGE_SIZE, 0, &hvc);
}
addr += PAGE_SIZE;
}
+ if (!err)
+ err = do_ops(&hvc, hvc.index, 1);
+
+ if (err < 0)
+ panic("flush_tlb_kernel failed, errno = %d\n", err);
return updated;
}
@@ -457,7 +487,7 @@
kill:
printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address);
- force_sig(SIGKILL, current);
+ force_sig(SIGKILL);
}
pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address)
@@ -491,6 +521,13 @@
void flush_tlb_all(void)
{
+ /*
+ * Don't bother flushing if this address space is about to be
+ * destroyed.
+ */
+ if (atomic_read(¤t->mm->mm_users) == 0)
+ return;
+
flush_tlb_mm(current->mm);
}
@@ -512,6 +549,13 @@
static void fix_range(struct mm_struct *mm, unsigned long start_addr,
unsigned long end_addr, int force)
{
+ /*
+ * Don't bother flushing if this address space is about to be
+ * destroyed.
+ */
+ if (atomic_read(&mm->mm_users) == 0)
+ return;
+
fix_range_common(mm, start_addr, end_addr, force);
}
@@ -527,13 +571,6 @@
void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
unsigned long end)
{
- /*
- * Don't bother flushing if this address space is about to be
- * destroyed.
- */
- if (atomic_read(&mm->mm_users) == 0)
- return;
-
fix_range(mm, start, end, 0);
}