x86/xen: Add xen_no_vector_callback option to test PCI INTX delivery

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[ Upstream commit b36b0fe96a ]

It's useful to be able to test non-vector event channel delivery, to make
sure Linux will work properly on older Xen which doesn't have it.

It's also useful for those working on Xen and Xen-compatible hypervisors,
because there are guest kernels still in active use which use PCI INTX
even when vector delivery is available.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210106153958.584169-4-dwmw2@infradead.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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David Woodhouse 2021-01-06 15:39:56 +00:00 • committed by Greg Kroah-Hartman

parent fa5f2e04da

commit a8fddd4192

2 changed files with 14 additions and 1 deletions

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4

Documentation/admin-guide/kernel-parameters.txt

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11

arch/x86/xen/enlighten_hvm.c

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