On Mon, Sep 24, 2018 at 09:05:48PM +0300, Dmitry Osipenko wrote: > On 9/24/18 2:00 PM, Thierry Reding wrote: > > On Mon, Sep 24, 2018 at 03:41:51AM +0300, Dmitry Osipenko wrote: > >> There could be unlimited number of allocated domains, but only one domain > >> can be active at a time. Hence devices must be detached only from the > >> active domain. > >> > >> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > >> --- > >> drivers/iommu/tegra-gart.c | 8 +++++--- > >> 1 file changed, 5 insertions(+), 3 deletions(-) > > > > Do we have a mechanism of switching out different domains? I don't think > > we do, so I'm wondering if perhaps a better solution to this would be to > > just refuse to create more than one domain in the first place. That > > would also allow us to get rid of the global variable gart_handle. > > That's what was done in v1, Robin Murphy suggested that it will be > better not to restrict allocation of unpopulated domains. It is > mentioned in the changelog, see comment to v2 changes. Okay, fine. Thierry
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