[PATCH 10/10] KVM: arm64: Increase number of user memslots to 512

Marc Zyngier marc.zyngier at arm.com
Thu Mar 9 01:55:39 PST 2017

From: Linu Cherian <linu.cherian at cavium.com>

Having only 32 memslots is a real constraint for the maximum
number of PCI devices that can be assigned to a single guest.
Assuming each PCI device/virtual function having two memory BAR
regions, we could assign only 15 devices/virtual functions to a

Hence increase KVM_USER_MEM_SLOTS to 512 as done in other archs like

Reviewed-by: Christoffer Dall <cdall at linaro.org>
Signed-off-by: Linu Cherian <linu.cherian at cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
 arch/arm64/include/asm/kvm_host.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 6ac17ee887c9..e7705e7bb07b 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -30,7 +30,7 @@
-#define KVM_USER_MEM_SLOTS 32
+#define KVM_USER_MEM_SLOTS 512
 #define KVM_HALT_POLL_NS_DEFAULT 500000

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