This is a note to let you know that I've just added the patch titled
xen/p2m: An early bootup variant of set_phys_to_machine
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xen-p2m-an-early-bootup-variant-of-set_phys_to_machine.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 940713bb2ce3033f468a220094a07250a2f69bdd Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Fri, 30 Mar 2012 14:33:14 -0400
Subject: xen/p2m: An early bootup variant of set_phys_to_machine
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
commit 940713bb2ce3033f468a220094a07250a2f69bdd upstream.
During early bootup we can't use alloc_page, so to allocate
leaf pages in the P2M we need to use extend_brk. For that
we are utilizing the early_alloc_p2m and early_alloc_p2m_middle
functions to do the job for us. This function follows the
same logic as set_phys_to_machine.
Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/xen/page.h | 1 +
arch/x86/xen/p2m.c | 15 +++++++++++++++
2 files changed, 16 insertions(+)
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -44,6 +44,7 @@ extern unsigned long machine_to_phys_nr
extern unsigned long get_phys_to_machine(unsigned long pfn);
extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
+extern bool __init early_set_phys_to_machine(unsigned long pfn, unsigned long mfn);
extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
extern unsigned long set_phys_range_identity(unsigned long pfn_s,
unsigned long pfn_e);
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -570,6 +570,21 @@ static bool __init early_alloc_p2m(unsig
}
return true;
}
+bool __init early_set_phys_to_machine(unsigned long pfn, unsigned long mfn)
+{
+ if (unlikely(!__set_phys_to_machine(pfn, mfn))) {
+ if (!early_alloc_p2m(pfn))
+ return false;
+
+ if (!early_alloc_p2m_middle(pfn, false /* boundary crossover OK!*/))
+ return false;
+
+ if (!__set_phys_to_machine(pfn, mfn))
+ return false;
+ }
+
+ return true;
+}
unsigned long __init set_phys_range_identity(unsigned long pfn_s,
unsigned long pfn_e)
{
Patches currently in stable-queue which might be from konrad.wilk@xxxxxxxxxx are
queue-3.4/xen-p2m-move-code-around-to-allow-for-better-re-usage.patch
queue-3.4/xen-p2m-collapse-early_alloc_p2m_middle-redundant-checks.patch
queue-3.4/xen-setup-populate-freed-mfns-from-non-ram-e820-entries-and-gaps-to-e820-ram.patch
queue-3.4/xen-setup-combine-the-two-hypercall-functions-since-they-are-quite-similar.patch
queue-3.4/xen-p2m-allow-alloc_p2m_middle-to-call-reserve_brk-depending-on-argument.patch
queue-3.4/xen-p2m-an-early-bootup-variant-of-set_phys_to_machine.patch
queue-3.4/xen-setup-update-va-mapping-when-releasing-memory-during-setup.patch
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