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History

Michael Kelley 37200078ed Drivers: hv: vmbus: Propagate VMbus coherence to each VMbus device

VMbus synthetic devices are not represented in the ACPI DSDT -- only
the top level VMbus device is represented. As a result, on ARM64
coherence information in the _CCA method is not specified for
synthetic devices, so they default to not hardware coherent.
Drivers for some of these synthetic devices have been recently
updated to use the standard DMA APIs, and they are incurring extra
overhead of unneeded software coherence management.

Fix this by propagating coherence information from the VMbus node
in ACPI to the individual synthetic devices. There's no effect on
x86/x64 where devices are always hardware coherent.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/1648138492-2191-2-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

2022-03-29 12:12:50 +00:00

channel_mgmt.c

Drivers: hv: vmbus: Initialize request offers message for Isolation VM

2022-01-05 20:39:14 +00:00

channel.c

Drivers: hv: vmbus: Initialize VMbus ring buffer for Isolation VM

2021-10-28 11:26:36 +00:00

connection.c

Drivers: hv: vmbus: Add SNP support for VMbus channel initiate message

2021-10-28 11:22:55 +00:00

hv_balloon.c

Drivers: hv: balloon: account for vmbus packet header in max_pkt_size