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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-03-30 14:33:14 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-04-06 17:03:06 -0400 |
| commit | 940713bb2ce3033f468a220094a07250a2f69bdd (patch) | |
| tree | 2bdf0c6eb1a2d530737918544423d56fb0ea4dd8 /arch/x86 | |
| parent | d5096850b47424fb0f1c6a75b8f7184f7169319a (diff) | |
| download | blackbird-op-linux-940713bb2ce3033f468a220094a07250a2f69bdd.tar.gz blackbird-op-linux-940713bb2ce3033f468a220094a07250a2f69bdd.zip | |
xen/p2m: An early bootup variant of set_phys_to_machine
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: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 1 | ||||
| -rw-r--r-- | arch/x86/xen/p2m.c | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index c34f96c2f7a0..93971e841dd5 100644 --- 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); diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index 952edefcedb3..ffd08c414e91 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -570,6 +570,21 @@ static bool __init early_alloc_p2m(unsigned long pfn) } 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) { |
