[Xen-changelog] [xen master] xen/arm64: do not (incorrectly) limit size of xenheap

[patchbot@xxxxxxx]

commit 0a7167d9b20cdc48e6ea320fbbb920b3267c9757
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Fri Sep 4 13:57:00 2015 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Fri Sep 4 14:58:07 2015 +0100

    xen/arm64: do not (incorrectly) limit size of xenheap
    
    The commit 88e3ed61642bb393458acc7a9bd2f96edc337190 "x86/NUMA: make
    init_node_heap() respect Xen heap limit" breaks boot on the arm64 board
    X-Gene.
    
    The xenheap bits variable is used to know the last RAM MFN always mapped
    in Xen virtual memory. If the value is 0, it means that all the memory is
    always mapped in Xen virtual memory.
    
    On X-gene the RAM bank resides above 128GB and last xenheap MFN is
    0x4400000. With the new way to calculate the number of bits, xenheap_bits
    will be equal to 38 bits. This will result to hide all the RAM and the
    impossibility to allocate xenheap memory.
    
    Given that aarch64 have always all the memory mapped in Xen virtual
    memory, it's not necessary to call xenheap_max_mfn which set the number
    of bits.
    
    Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/setup.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 6626eba..48f734f 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -665,7 +665,6 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t 
dtb_size)
     xenheap_virt_end = XENHEAP_VIRT_START + ram_end - ram_start;
     xenheap_mfn_start = ram_start >> PAGE_SHIFT;
     xenheap_mfn_end = ram_end >> PAGE_SHIFT;
-    xenheap_max_mfn(xenheap_mfn_end);
 
     /*
      * Need enough mapped pages for copying the DTB.
--
generated by git-patchbot for /home/xen/git/xen.git#master

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