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Commit cec26bc3 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Paolo Bonzini
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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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent e77d99d4

arch/powerpc/kvm/book3s_hv_builtin.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -163,6 +163,12 @@ void __init kvm_cma_reserve(void) 
	unsigned long align_size;

	unsigned long align_size;

	struct memblock_region *reg;

	struct memblock_region *reg;

	phys_addr_t selected_size = 0;

	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

	 * We cannot use memblock_phys_mem_size() here, because

	 * memblock_analyze() has not been called yet.

	 * memblock_analyze() has not been called yet.