On Wed, Feb 08, 2017 at 12:45:41PM +0530, linucherian@xxxxxxxxx wrote: > From: Linu Cherian <linu.cherian@xxxxxxxxxx> > > 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 > guest. > > Hence increase KVM_USER_MEM_SLOTS to 508, so that KVM_MEM_SLOTS_NUM is > 512 as done in other archs like x86 and powerpc. Actually on powerpc they just define KVM_USER_MEM_SLOTS as 512 directly. On x86 they define them as 509 and have 3 private mem slots. I don't understand the difference and as far as I can tell we don't have any private memslots on arm/arm64, so this is just weird to me. Thanks, -Christoffer > > Signed-off-by: Linu Cherian <linu.cherian@xxxxxxxxxx> > --- > 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 e505038..88f017d 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -30,7 +30,7 @@ > > #define __KVM_HAVE_ARCH_INTC_INITIALIZED > > -#define KVM_USER_MEM_SLOTS 32 > +#define KVM_USER_MEM_SLOTS 508 > #define KVM_PRIVATE_MEM_SLOTS 4 > #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 > #define KVM_HALT_POLL_NS_DEFAULT 500000 > -- > 1.9.1 > _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
