[GIT PULL] (xen) stable/bug-fixes-rc2 for 2.6.38-rc3

From: Konrad Rzeszutek Wilk
Date: Thu Jan 27 2011 - 12:30:21 EST


Linus,

Please git pull since commit 1bae4ce27c9c90344f23c65ea6966c50ffeae2f5
Linus Torvalds (1)
Linux 2.6.38-rc2

patches from:

git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/bug-fixes-rc2

The patches are fixes that were found during boot-up testing with non-page aligned
E820 memory layouts. Oh, and also a fix for the time keeping code on Intel hardware
so that we use the pvops halt insted of the cpuidle driver.

Stefan Bader (1):
xen/p2m: Mark INVALID_P2M_ENTRY the mfn_list past max_pfn.

Stefano Stabellini (2):
xen/e820: Guard against E820_RAM not having page-aligned size or start.
xen/setup: Route halt operations to safe_halt pvop.

arch/x86/xen/p2m.c | 18 ++++++------------
arch/x86/xen/setup.c | 8 +++++++-
2 files changed, 13 insertions(+), 13 deletions(-)


diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index ddc81a0..fd12d7c 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -241,21 +241,15 @@ void __init xen_build_dynamic_phys_to_machine(void)
* As long as the mfn_list has enough entries to completely
* fill a p2m page, pointing into the array is ok. But if
* not the entries beyond the last pfn will be undefined.
- * And guessing that the 'what-ever-there-is' does not take it
- * too kindly when changing it to invalid markers, a new page
- * is allocated, initialized and filled with the valid part.
*/
if (unlikely(pfn + P2M_PER_PAGE > max_pfn)) {
unsigned long p2midx;
- unsigned long *p2m = extend_brk(PAGE_SIZE, PAGE_SIZE);
- p2m_init(p2m);
-
- for (p2midx = 0; pfn + p2midx < max_pfn; p2midx++) {
- p2m[p2midx] = mfn_list[pfn + p2midx];
- }
- p2m_top[topidx][mididx] = p2m;
- } else
- p2m_top[topidx][mididx] = &mfn_list[pfn];
+
+ p2midx = max_pfn % P2M_PER_PAGE;
+ for ( ; p2midx < P2M_PER_PAGE; p2midx++)
+ mfn_list[pfn + p2midx] = INVALID_P2M_ENTRY;
+ }
+ p2m_top[topidx][mididx] = &mfn_list[pfn];
}

m2p_override_init();
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index b5a7f92..a8a66a5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -179,8 +179,13 @@ char * __init xen_memory_setup(void)
e820.nr_map = 0;
xen_extra_mem_start = mem_end;
for (i = 0; i < memmap.nr_entries; i++) {
- unsigned long long end = map[i].addr + map[i].size;
+ unsigned long long end;

+ /* Guard against non-page aligned E820 entries. */
+ if (map[i].type == E820_RAM)
+ map[i].size -= (map[i].size + map[i].addr) % PAGE_SIZE;
+
+ end = map[i].addr + map[i].size;
if (map[i].type == E820_RAM && end > mem_end) {
/* RAM off the end - may be partially included */
u64 delta = min(map[i].size, end - mem_end);
@@ -350,6 +355,7 @@ void __init xen_arch_setup(void)
boot_cpu_data.hlt_works_ok = 1;
#endif
pm_idle = default_idle;
+ boot_option_idle_override = IDLE_HALT;

fiddle_vdso();
}
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