From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
For identity cases we want to call reserve_brk only on the boundary
conditions of the middle P2M (so P2M[x][y][0] = extend_brk). This is
to work around identify regions (PCI spaces, gaps in E820) which are not
aligned on 2MB regions.
However for the case were we want to allocate P2M middle leafs at the
early bootup stage, irregardless of this alignment check we need some
means of doing that. For that we provide the new argument.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
(cherry picked from commit cef4cca551d652b7f69c9d76337c5fae24e069dc)
Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Tested-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
arch/x86/xen/p2m.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index a4f1b80..9d7d223 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -499,7 +499,7 @@ static bool alloc_p2m(unsigned long pfn)
return true;
}
-static bool __init early_alloc_p2m_middle(unsigned long pfn)
+static bool __init early_alloc_p2m_middle(unsigned long pfn, bool check_boundary)
{
unsigned topidx, mididx, idx;
@@ -508,7 +508,7 @@ static bool __init early_alloc_p2m_middle(unsigned long pfn)
idx = p2m_index(pfn);
/* Pfff.. No boundary cross-over, lets get out. */
- if (!idx)
+ if (!idx && check_boundary)
return false;
WARN(p2m_top[topidx][mididx] == p2m_identity,
@@ -531,7 +531,7 @@ static bool __init early_alloc_p2m_middle(unsigned long pfn)
p2m_top[topidx][mididx] = p2m;
/* For save/restore we need to MFN of the P2M saved */
-
+
mid_mfn_p = p2m_top_mfn_p[topidx];
WARN(mid_mfn_p[mididx] != virt_to_mfn(p2m_missing),
"P2M_TOP_P[%d][%d] != MFN of p2m_missing!\n",
@@ -592,8 +592,8 @@ unsigned long __init set_phys_range_identity(unsigned long pfn_s,
WARN_ON(!early_alloc_p2m(pfn));
}
- early_alloc_p2m_middle(pfn_s);
- early_alloc_p2m_middle(pfn_e);
+ early_alloc_p2m_middle(pfn_s, true);
+ early_alloc_p2m_middle(pfn_e, true);
for (pfn = pfn_s; pfn < pfn_e; pfn++)
if (!__set_phys_to_machine(pfn, IDENTITY_FRAME(pfn)))
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html