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| author | Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de> | 2019-08-12 13:21:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-04 12:43:55 +0200 |
| commit | 8428413b1d14fc880b805c98f571169e7f1ac369 (patch) | |
| tree | f9d510b4402769bec0a2be9137f687a6d36fec82 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 68e26a8d224f022cf7ec6ebb319a88ad29eb46a4 (diff) | |
serial: 8250_pci: Implement MSI(-X) support
There may be setups, where legacy interrupts are not available. This is
the caese, e.g., when Linux runs as guest (aka. non-root cell) of the
partitioning hypervisor Jailhouse. There, only MSI(-X) interrupts are
available for guests.
But the 8250_pci driver currently only supports legacy ints. So let's
enable MSI(-X) interrupts.
Nevertheless, this needs to handled with care: while many 8250 devices
actually claim to support MSI(-X) interrupts it should not be enabled be
default. I had at least one device in my hands with broken MSI
implementation.
So better introduce a whitelist with devices that are known to support
MSI(-X) interrupts. I tested all devices mentioned in the patch.
Signed-off-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Link: https://lore.kernel.org/r/20190812112152.693622-1-ralf.ramsauer@oth-regensburg.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions