[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v8 3/4] xen/arm: account IO handler for emulated PCI host bridge
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> At the moment, we always allocate an extra 16 slots for IO handlers (see MAX_IO_HANDLER). So while adding an IO trap handler for the emulated PCI host bridge we are not breaking anything, but we have a latent bug as the maximum number of IOs may be exceeded. Fix this by explicitly telling that we have an additional IO handler, so it is accounted. Fixes: d59168dc05a5 ("xen/arm: Enable the existing x86 virtual PCI support for ARM") Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> Acked-by: Julien Grall <jgrall@xxxxxxxxxx> --- Since v7: - updated comment New in v7 --- xen/arch/arm/vpci.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/vpci.c b/xen/arch/arm/vpci.c index 1564448c6c8d..84aaaaebd69d 100644 --- a/xen/arch/arm/vpci.c +++ b/xen/arch/arm/vpci.c @@ -124,7 +124,11 @@ unsigned int domain_vpci_get_num_mmio_handlers(struct domain *d) return ret < 0 ? 0 : ret; } - return 0; + /* + * For guests each host bridge requires one region to cover the + * configuration space. At the moment, we only expose a single host bridge. + */ + return 1; } /* -- 2.25.1
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