Messages in this thread | | | From | Marc Zyngier <> | Subject | [GIT PULL] irqchip updates for 4.19 | Date | Mon, 6 Aug 2018 09:56:39 +0100 |
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Hi Thomas,
The 4.19 PR is more of a GICv3 special than an actual irqchip PR.
It reworks the way we allocate LPIs so that it can be much more fine grained (instead of the allocation in chunks of 32 interrupts that we've used so far). This allows supporting system that have thousands of devices (not kidding!), each one using a single MSI... It also helps in situation where the hypervisor enforces a very small number of available LPIs.
Another change is the conversion of the ITS driver to using raw spinlocks, making it work on RT (yay!).
Please pull,
M.
The following changes since commit 9d3cce1e8b8561fed5f383d22a4d6949db4eadbe:
Linux 4.18-rc5 (2018-07-15 12:49:31 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git tags/irqchip-4.19
for you to fetch changes up to a8db74564b0c634667e1722264bde303d296f566:
irqchip/gic-v3-its: Make its_lock a raw_spin_lock_t (2018-08-06 09:16:19 +0100)
---------------------------------------------------------------- irqchip updates for 4.19
- GICv3 ITS LPI allocation revamp - GICv3 support for hypervisor-enforced LPI range - GICv3 ITS conversion to raw spinlock
---------------------------------------------------------------- Marc Zyngier (7): irqchip/gic-v3-its: Refactor LPI allocator irqchip/gic-v3-its: Use full range of LPIs irqchip/gic-v3-its: Move minimum LPI requirements to individual busses irqchip/gic-v3-its: Drop chunk allocation compatibility irqchip/gic-v3: Expose GICD_TYPER in the rdist structure irqchip/gic-v3-its: Honor hypervisor enforced LPI range irqchip/gic-v3-its: Reduce minimum LPI allocation to 1 for PCI devices
Sebastian Andrzej Siewior (1): irqchip/gic-v3-its: Make its_lock a raw_spin_lock_t
drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 3 + drivers/irqchip/irq-gic-v3-its-pci-msi.c | 16 +- drivers/irqchip/irq-gic-v3-its-platform-msi.c | 2 + drivers/irqchip/irq-gic-v3-its.c | 243 +++++++++++++++++--------- drivers/irqchip/irq-gic-v3.c | 4 +- include/linux/irqchip/arm-gic-v3.h | 3 +- 6 files changed, 178 insertions(+), 93 deletions(-)
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