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x86/xen: don't count how many PFNs are identity mapped 

This accounting is just used to print a diagnostic message that isn't
very useful.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
David Vrabel 2015-01-07 11:01:08 +00:00
parent 701a261ad6
commit bc7142cf79
1 changed files with 9 additions and 18 deletions
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27
arch/x86/xen/setup.c
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@ -229,15 +229,14 @@ 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 +249,14 @@ 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);
}
/*
@ -318,7 +315,6 @@ 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 +343,7 @@ 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 +366,7 @@ 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 pfn;
unsigned long i = 0;
@ -386,8 +381,7 @@ 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 +392,7 @@ 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 +404,6 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
/* Update variables to reflect new mappings. */
i += size;
remap_pfn += size;
*identity += size;
}
/*
@ -430,7 +423,6 @@ static void __init xen_set_identity_and_remap(
unsigned long *released)
{
phys_addr_t start = 0;
unsigned long identity = 0;
unsigned long last_pfn = nr_pages;
const struct e820entry *entry;
unsigned long num_released = 0;
@ -460,14 +452,13 @@ 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);
start = end;
}
}
*released = num_released;
pr_info("Set %ld page(s) to 1-1 mapping\n", identity);
pr_info("Released %ld page(s)\n", num_released);
}