[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] xen/arm: account IO handler for emulated PCI host bridge
commit b88109676376217e11d158de8325eb2234327760 Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> AuthorDate: Thu Dec 9 09:29:17 2021 +0200 Commit: Julien Grall <jgrall@xxxxxxxxxx> CommitDate: Wed Dec 15 17:39:56 2021 +0000 xen/arm: account IO handler for emulated PCI host bridge 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> Reviewed-by: Rahul Singh <rahul.singh@xxxxxxx> Tested-by: Rahul Singh <rahul.singh@xxxxxxx> --- 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 ebc4c8398b..a9fc5817f9 100644 --- a/xen/arch/arm/vpci.c +++ b/xen/arch/arm/vpci.c @@ -130,7 +130,11 @@ unsigned int domain_vpci_get_num_mmio_handlers(struct domain *d) return 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; } /* -- generated by git-patchbot for /home/xen/git/xen.git#staging
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