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Diffstat (limited to 'arch/x86/xen/setup.c')
-rw-r--r--arch/x86/xen/setup.c42
1 files changed, 20 insertions, 22 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index dfd77dec8e2b..865e56cea7a0 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -140,7 +140,7 @@ static void __init xen_del_extra_mem(u64 start, u64 size)
unsigned long __ref xen_chk_extra_mem(unsigned long pfn)
{
int i;
- unsigned long addr = PFN_PHYS(pfn);
+ phys_addr_t addr = PFN_PHYS(pfn);
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
if (addr >= xen_extra_mem[i].start &&
@@ -160,6 +160,8 @@ void __init xen_inv_extra_mem(void)
int i;
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
+ if (!xen_extra_mem[i].size)
+ continue;
pfn_s = PFN_DOWN(xen_extra_mem[i].start);
pfn_e = PFN_UP(xen_extra_mem[i].start + xen_extra_mem[i].size);
for (pfn = pfn_s; pfn < pfn_e; pfn++)
@@ -229,15 +231,14 @@ static int __init xen_free_mfn(unsigned long mfn)
* as a fallback if the remapping fails.
*/
static void __init xen_set_identity_and_release_chunk(unsigned long start_pfn,
- unsigned long end_pfn, unsigned long nr_pages, unsigned long *identity,
- unsigned long *released)
+ unsigned long end_pfn, unsigned long nr_pages, unsigned long *released)
{
- unsigned long len = 0;
unsigned long pfn, end;
int ret;
WARN_ON(start_pfn > end_pfn);
+ /* Release pages first. */
end = min(end_pfn, nr_pages);
for (pfn = start_pfn; pfn < end; pfn++) {
unsigned long mfn = pfn_to_mfn(pfn);
@@ -250,16 +251,14 @@ static void __init xen_set_identity_and_release_chunk(unsigned long start_pfn,
WARN(ret != 1, "Failed to release pfn %lx err=%d\n", pfn, ret);
if (ret == 1) {
+ (*released)++;
if (!__set_phys_to_machine(pfn, INVALID_P2M_ENTRY))
break;
- len++;
} else
break;
}
- /* Need to release pages first */
- *released += len;
- *identity += set_phys_range_identity(start_pfn, end_pfn);
+ set_phys_range_identity(start_pfn, end_pfn);
}
/*
@@ -287,7 +286,7 @@ static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
}
/* Update kernel mapping, but not for highmem. */
- if ((pfn << PAGE_SHIFT) >= __pa(high_memory))
+ if (pfn >= PFN_UP(__pa(high_memory - 1)))
return;
if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
@@ -318,7 +317,6 @@ static void __init xen_do_set_identity_and_remap_chunk(
unsigned long ident_pfn_iter, remap_pfn_iter;
unsigned long ident_end_pfn = start_pfn + size;
unsigned long left = size;
- unsigned long ident_cnt = 0;
unsigned int i, chunk;
WARN_ON(size == 0);
@@ -347,8 +345,7 @@ static void __init xen_do_set_identity_and_remap_chunk(
xen_remap_mfn = mfn;
/* Set identity map */
- ident_cnt += set_phys_range_identity(ident_pfn_iter,
- ident_pfn_iter + chunk);
+ set_phys_range_identity(ident_pfn_iter, ident_pfn_iter + chunk);
left -= chunk;
}
@@ -371,7 +368,7 @@ static void __init xen_do_set_identity_and_remap_chunk(
static unsigned long __init xen_set_identity_and_remap_chunk(
const struct e820entry *list, size_t map_size, unsigned long start_pfn,
unsigned long end_pfn, unsigned long nr_pages, unsigned long remap_pfn,
- unsigned long *identity, unsigned long *released)
+ unsigned long *released, unsigned long *remapped)
{
unsigned long pfn;
unsigned long i = 0;
@@ -386,8 +383,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
/* Do not remap pages beyond the current allocation */
if (cur_pfn >= nr_pages) {
/* Identity map remaining pages */
- *identity += set_phys_range_identity(cur_pfn,
- cur_pfn + size);
+ set_phys_range_identity(cur_pfn, cur_pfn + size);
break;
}
if (cur_pfn + size > nr_pages)
@@ -398,7 +394,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
if (!remap_range_size) {
pr_warning("Unable to find available pfn range, not remapping identity pages\n");
xen_set_identity_and_release_chunk(cur_pfn,
- cur_pfn + left, nr_pages, identity, released);
+ cur_pfn + left, nr_pages, released);
break;
}
/* Adjust size to fit in current e820 RAM region */
@@ -410,7 +406,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
/* Update variables to reflect new mappings. */
i += size;
remap_pfn += size;
- *identity += size;
+ *remapped += size;
}
/*
@@ -427,13 +423,13 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
static void __init xen_set_identity_and_remap(
const struct e820entry *list, size_t map_size, unsigned long nr_pages,
- unsigned long *released)
+ unsigned long *released, unsigned long *remapped)
{
phys_addr_t start = 0;
- unsigned long identity = 0;
unsigned long last_pfn = nr_pages;
const struct e820entry *entry;
unsigned long num_released = 0;
+ unsigned long num_remapped = 0;
int i;
/*
@@ -460,14 +456,14 @@ static void __init xen_set_identity_and_remap(
last_pfn = xen_set_identity_and_remap_chunk(
list, map_size, start_pfn,
end_pfn, nr_pages, last_pfn,
- &identity, &num_released);
+ &num_released, &num_remapped);
start = end;
}
}
*released = num_released;
+ *remapped = num_remapped;
- pr_info("Set %ld page(s) to 1-1 mapping\n", identity);
pr_info("Released %ld page(s)\n", num_released);
}
@@ -586,6 +582,7 @@ char * __init xen_memory_setup(void)
struct xen_memory_map memmap;
unsigned long max_pages;
unsigned long extra_pages = 0;
+ unsigned long remapped_pages;
int i;
int op;
@@ -635,9 +632,10 @@ char * __init xen_memory_setup(void)
* underlying RAM.
*/
xen_set_identity_and_remap(map, memmap.nr_entries, max_pfn,
- &xen_released_pages);
+ &xen_released_pages, &remapped_pages);
extra_pages += xen_released_pages;
+ extra_pages += remapped_pages;
/*
* Clamp the amount of extra memory to a EXTRA_MEM_RATIO
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-31 21:06:45 +0300