On Wed, Oct 14, 2026 at 02:34:26PM -0700, Ben Levinsky wrote: > Register named reserved-memory carveouts and expose the firmware > resource table after it has been loaded into BRAM. This lets remoteproc > create virtqueues backed by reserved shared DDR without deriving > carveout roles from DT node names. Map the shared-memory carveouts with > the common rproc_mem_entry_ioremap_wc() and rproc_mem_entry_iounmap() > callbacks. > > Use the mailbox framework to send virtqueue notification IDs. Defer > received notifications to process context before dispatching them to > the remoteproc virtqueues. Keep mailbox payload storage valid until > transmit completion and order write-combined vring updates before each > kick. > > For designs where the mailbox and remote processor share a clock, request > the mailbox channels only after enabling that clock, while the processor > is still held in reset. Release the channels before disabling the clock > during stop. > > The mailboxes are optional. Without them the driver keeps supporting > load, start, and stop only. > > Select the mailbox framework, the AMD PL Mailbox controller and the > virtio RPMsg bus, which the driver uses for notifications and RPMsg > channels. Selecting MAILBOX while depending on GPIOLIB creates a > Kconfig recursive dependency, because GPIOLIB is selected by drivers > that are reachable from MAILBOX, so select GPIOLIB as well instead of > depending on it. The driver always needs GPIO for the reset line. > Depend on HAS_IOMEM, which the selected mailbox controller and the > write-combined carveout mappings require. > > Assisted-by: LLM sparse > Signed-off-by: Ben Levinsky <[email protected]> > --- > drivers/remoteproc/Kconfig | 6 +- > drivers/remoteproc/amd_mbv_bram_rproc.c | 231 +++++++++++++++++++++++- > 2 files changed, 235 insertions(+), 2 deletions(-) > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index 5b56b2dcc725..9ebbbf76289f 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -25,7 +25,11 @@ config REMOTEPROC_CDEV > > config AMD_MBV_BRAM_REMOTEPROC > tristate "AMD MicroBlaze/V BRAM-based remoteproc support" > - depends on OF && COMMON_CLK && (GPIOLIB || COMPILE_TEST) > + depends on OF && COMMON_CLK && HAS_IOMEM > + select GPIOLIB > + select MAILBOX > + select AMD_PL_MAILBOX
You should not select user-visible symbols. Best regards, Krzysztof
