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| author | Cristian Marussi <cristian.marussi@arm.com> | 2022-02-17 16:12:29 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2022-02-21 13:36:48 +0300 |
| commit | 5a3b7185c47c061330bdd71233126181d55ed3d5 (patch) | |
| tree | 9c33355816dec0e7cf2f71f46c4725a4ccaba606 /drivers/firmware/arm_scmi/Kconfig | |
| parent | 9a1699bda095e1ee2f5d0aa43a91d1fccca8b69c (diff) | |
| download | linux-5a3b7185c47c061330bdd71233126181d55ed3d5.tar.xz | |
firmware: arm_scmi: Add atomic mode support to virtio transport
Add support for .mark_txdone and .poll_done transport operations to SCMI
VirtIO transport as pre-requisites to enable atomic operations.
Add a Kernel configuration option to enable SCMI VirtIO transport polling
and atomic mode for selected SCMI transactions while leaving it default
disabled.
Link: https://lore.kernel.org/r/20220217131234.50328-4-cristian.marussi@arm.com
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Skalkin <igor.skalkin@opensynergy.com>
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/Kconfig')
| -rw-r--r-- | drivers/firmware/arm_scmi/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index d429326433d1..7794bd41eaa0 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -118,6 +118,21 @@ config ARM_SCMI_TRANSPORT_VIRTIO_VERSION1_COMPLIANCE the ones implemented by kvmtool) and let the core Kernel VirtIO layer take care of the needed conversions, say N. +config ARM_SCMI_TRANSPORT_VIRTIO_ATOMIC_ENABLE + bool "Enable atomic mode for SCMI VirtIO transport" + depends on ARM_SCMI_TRANSPORT_VIRTIO + help + Enable support of atomic operation for SCMI VirtIO based transport. + + If you want the SCMI VirtIO based transport to operate in atomic + mode, avoiding any kind of sleeping behaviour for selected + transactions on the TX path, answer Y. + + Enabling atomic mode operations allows any SCMI driver using this + transport to optionally ask for atomic SCMI transactions and operate + in atomic context too, at the price of using a number of busy-waiting + primitives all over instead. If unsure say N. + endif #ARM_SCMI_PROTOCOL config ARM_SCMI_POWER_DOMAIN |