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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-12-29 16:44:34 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-12-29 21:13:04 +0100 |
| commit | 69790ba92b8d67eaee5e50b30a5b696d40664caf (patch) | |
| tree | e7e30a5d302e20ead367302421d9cc1a30e2d956 | |
| parent | genirq/msi: Handle reactivation only on success (diff) | |
| download | linux-69790ba92b8d67eaee5e50b30a5b696d40664caf.tar.xz linux-69790ba92b8d67eaee5e50b30a5b696d40664caf.zip | |
genirq: Introduce IRQD_CAN_RESERVE flag
Add a new flag to mark interrupts which can use reservation mode. This is
going to be used in subsequent patches to disable reservation mode for a
certain class of MSI devices.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexandru Chirvasitu <achirvasub@gmail.com>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Mikael Pettersson <mikpelinux@gmail.com>
Cc: Josh Poulson <jopoulso@microsoft.com>
Cc: Mihai Costache <v-micos@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-pci@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: devel@linuxdriverproject.org
Cc: KY Srinivasan <kys@microsoft.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Sakari Ailus <sakari.ailus@intel.com>,
Cc: linux-media@vger.kernel.org
| -rw-r--r-- | include/linux/irq.h | 17 | ||||
| -rw-r--r-- | kernel/irq/debugfs.c | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index e140f69163b6..a0231e96a578 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -212,6 +212,7 @@ struct irq_data { * mask. Applies only to affinity managed irqs. * IRQD_SINGLE_TARGET - IRQ allows only a single affinity target * IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set + * IRQD_CAN_RESERVE - Can use reservation mode */ enum { IRQD_TRIGGER_MASK = 0xf, @@ -233,6 +234,7 @@ enum { IRQD_MANAGED_SHUTDOWN = (1 << 23), IRQD_SINGLE_TARGET = (1 << 24), IRQD_DEFAULT_TRIGGER_SET = (1 << 25), + IRQD_CAN_RESERVE = (1 << 26), }; #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) @@ -377,6 +379,21 @@ static inline bool irqd_is_managed_and_shutdown(struct irq_data *d) return __irqd_to_state(d) & IRQD_MANAGED_SHUTDOWN; } +static inline void irqd_set_can_reserve(struct irq_data *d) +{ + __irqd_to_state(d) |= IRQD_CAN_RESERVE; +} + +static inline void irqd_clr_can_reserve(struct irq_data *d) +{ + __irqd_to_state(d) &= ~IRQD_CAN_RESERVE; +} + +static inline bool irqd_can_reserve(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_CAN_RESERVE; +} + #undef __irqd_to_state static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c index 7f608ac39653..acfaaef8672a 100644 --- a/kernel/irq/debugfs.c +++ b/kernel/irq/debugfs.c @@ -113,6 +113,7 @@ static const struct irq_bit_descr irqdata_states[] = { BIT_MASK_DESCR(IRQD_SETAFFINITY_PENDING), BIT_MASK_DESCR(IRQD_AFFINITY_MANAGED), BIT_MASK_DESCR(IRQD_MANAGED_SHUTDOWN), + BIT_MASK_DESCR(IRQD_CAN_RESERVE), BIT_MASK_DESCR(IRQD_FORWARDED_TO_VCPU), |