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KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode 

We use cma reserved area for creating guest hash page table.
Don't do the reservation in non-hypervisor mode. This avoids unnecessary
CMA reservation when booting with limited memory configs like
fadump and kdump.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Aneesh Kumar K.V 2014-09-29 13:32:38 +05:30 committed by Paolo Bonzini
parent e77d99d4a4
commit cec26bc3c1
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/kvm/book3s_hv_builtin.c
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@ -163,6 +163,12 @@ void __init kvm_cma_reserve(void)
unsigned long align_size;
struct memblock_region *reg;
phys_addr_t selected_size = 0;
/*
* We need CMA reservation only when we are in HV mode
*/
if (!cpu_has_feature(CPU_FTR_HVMODE))
return;
/*
* We cannot use memblock_phys_mem_size() here, because
* memblock_analyze() has not been called yet.