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| author |   Marc Zyngier <marc.zyngier@arm.com> | 2018-05-08 13:14:36 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-05-13 15:59:01 +0200 |
| commit | 505287525c24d5c78b662fd73721ad9900b91fcc (patch) | |
| tree | b12a24720a5963ba2b64c2bc169845f6a36c7fec /drivers/irqchip/irq-gic-v3.c | |
| parent | irqchip/gic-v3: Mark the base irq domain as DOMAIN_BUS_WIRED (diff) | |
| download | linux-dev-505287525c24d5c78b662fd73721ad9900b91fcc.tar.xz linux-dev-505287525c24d5c78b662fd73721ad9900b91fcc.zip | |
irqchip/gic-v3: Add support for Message Based Interrupts as an MSI controller
GICv3 offers the possibility to signal SPIs using a pair of doorbells
(SETPI, CLRSPI) under the name of Message Based Interrupts (MBI).
They can be used as either traditional (edge) MSIs, or the more exotic
level-triggered flavour.
Let's implement support for platform MSI, which is the original intent
for this feature.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20180508121438.11301-8-marc.zyngier@arm.com
Diffstat (limited to 'drivers/irqchip/irq-gic-v3.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 94164d7b87a6..5a67ec084588 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1113,6 +1113,12 @@ static int __init gic_init_bases(void __iomem *dist_base, pr_info("Distributor has %sRange Selector support\n", gic_data.has_rss ? "" : "no "); + if (typer & GICD_TYPER_MBIS) { + err = mbi_init(handle, gic_data.domain); + if (err) + pr_err("Failed to initialize MBIs\n"); + } + set_handle_irq(gic_handle_irq); gic_update_vlpi_properties(); |