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| author | David Vrabel <david.vrabel@citrix.com> | 2015-01-07 12:21:50 +0100 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-01-08 14:52:37 +0100 |
| commit | a97dae1a2e92e728d28515e88e8eda151f5796f5 (patch) | |
| tree | 6bd828229281ec2d7d105e9a06f59def9ae90e9d /arch | |
| parent | x86/xen: don't count how many PFNs are identity mapped (diff) | |
| download | linux-a97dae1a2e92e728d28515e88e8eda151f5796f5.tar.xz linux-a97dae1a2e92e728d28515e88e8eda151f5796f5.zip | |
x86/xen: add extra memory for remapped frames during setup
If the non-RAM regions in the e820 memory map are larger than the size
of the initial balloon, a BUG was triggered as the frames are remaped
beyond the limit of the linear p2m. The frames are remapped into the
initial balloon area (xen_extra_mem) but not enough of this is
available.
Ensure enough extra memory regions are added for these remapped
frames.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/setup.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 664dffc29b6b..feb6d86fa0a0 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -366,7 +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 *released) + unsigned long *released, unsigned long *remapped) { unsigned long pfn; unsigned long i = 0; @@ -404,6 +404,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk( /* Update variables to reflect new mappings. */ i += size; remap_pfn += size; + *remapped += size; } /* @@ -420,12 +421,13 @@ 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 last_pfn = nr_pages; const struct e820entry *entry; unsigned long num_released = 0; + unsigned long num_remapped = 0; int i; /* @@ -452,12 +454,13 @@ 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, - &num_released); + &num_released, &num_remapped); start = end; } } *released = num_released; + *remapped = num_remapped; pr_info("Released %ld page(s)\n", num_released); } @@ -577,6 +580,7 @@ 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; @@ -626,9 +630,10 @@ 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 |