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On Wed, Feb 05, 2020 at 03:50:14PM +0800, Jason Wang wrote: > > Would it be better for the map/umnap logic to happen inside each device ? > > Devices that needs the IOMMU will call iommu APIs from inside the driver callback. > > Technically, this can work. But if it can be done by vhost-vpda it will make > the vDPA driver more compact and easier to be implemented. Generally

On Wed, Feb 05, 2020 at 03:50:14PM +0800, Jason Wang wrote: > > Would it be better for the map/umnap logic to happen inside each device ? > > Devices that needs the IOMMU will call iommu APIs from inside the driver callback. > > Technically, this can work. But if it can be done by vhost-vpda it will make > the vDPA driver more compact and easier to be implemented. Generally

...be09aabce8f9c98: sysctl: Use ctl_table_size as stopping criteria for list macro (2023-08-15 15:26:18 -0700) ---------------------------------------------------------------- sysctl-6.6-rc1 Long ago we set out to remove the kitchen sink on kernel/sysctl.c arrays and placings sysctls to their own sybsystem or file to help avoid merge conflicts. Matthew Wilcox pointed out though that if we're going to do that we might as well also *save* space while at it and try to remove the extra last sysctl entry added at the end of each array, a sentintel, instead of bloating the kernel by adding a new sentin...

...e vDPA driver more compact and easier to be implemented. > > Generally speaking, in the kernel, it is normal to not hoist code of > out drivers into subsystems until 2-3 drivers are duplicating that > code. It helps ensure the right design is used > > Jason That's up to the sybsystem maintainer really, as there's also some intuition involved in guessing a specific API is widely useful. In-kernel APIs are flexible, if we find something isn't needed we just drop it. -- MST

...riteria for list macro (2023-08-15 15:26:18 -0700) > > > > ---------------------------------------------------------------- > > sysctl-6.6-rc1 > > > > Long ago we set out to remove the kitchen sink on kernel/sysctl.c arrays and > > placings sysctls to their own sybsystem or file to help avoid merge conflicts. > > Matthew Wilcox pointed out though that if we're going to do that we might as > > well also *save* space while at it and try to remove the extra last sysctl > > entry added at the end of each array, a sentintel, instead of bloating the...

This series contains all the fixes required to produce a working IGD passthrough box. All the changes are previously seen in the dev list but not yet accepted. Some of them are out-dated and need some reshape. Detailed description can be found later in each patch. . [PATCH 1/3] qemu-xen-trad/pt_msi_disable: do not clear all MSI flags . [PATCH 2/3] qemu-xen-trad: Correctly expose PCH ISA bridge