Commit bc7142cf authored by David Vrabel's avatar David Vrabel
Browse files

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: default avatarDavid Vrabel <david.vrabel@citrix.com>
Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
parent 701a261a

arch/x86/xen/setup.c

+9 −18
Original line number Diff line number Diff line
@@ -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);

}