diff options
| author | Cédric Le Goater <clg@kaod.org> | 2021-03-31 17:45:14 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-14 16:04:15 +0300 |
| commit | fd6db2892ebaa1383a93b4a609c65b96e615510a (patch) | |
| tree | 6e2f5af2135f0b946f6dd0d94b4d6ae99b8c0f10 /arch/powerpc/sysdev | |
| parent | 7dcc37b3eff97379b194adb17eb9a8270512dd1d (diff) | |
| download | linux-fd6db2892ebaa1383a93b4a609c65b96e615510a.tar.xz | |
powerpc/xive: Modernize XIVE-IPI domain with an 'alloc' handler
Instead of calling irq_create_mapping() to map the IPI for a node,
introduce an 'alloc' handler. This is usually an extension to support
hierarchy irq_domains which is not exactly the case for XIVE-IPI
domain. However, we can now use the irq_domain_alloc_irqs() routine
which allocates the IRQ descriptor on the specified node, even better
for cache performance on multi node machines.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210331144514.892250-10-clg@kaod.org
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index edd000bcc9f6..b025f42bf1f3 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -1102,15 +1102,26 @@ static struct irq_chip xive_ipi_chip = { * IPIs are marked per-cpu. We use separate HW interrupts under the * hood but associated with the same "linux" interrupt */ -static int xive_ipi_irq_domain_map(struct irq_domain *h, unsigned int virq, - irq_hw_number_t hw) +struct xive_ipi_alloc_info { + irq_hw_number_t hwirq; +}; + +static int xive_ipi_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) { - irq_set_chip_and_handler(virq, &xive_ipi_chip, handle_percpu_irq); + struct xive_ipi_alloc_info *info = arg; + int i; + + for (i = 0; i < nr_irqs; i++) { + irq_domain_set_info(domain, virq + i, info->hwirq + i, &xive_ipi_chip, + domain->host_data, handle_percpu_irq, + NULL, NULL); + } return 0; } static const struct irq_domain_ops xive_ipi_irq_domain_ops = { - .map = xive_ipi_irq_domain_map, + .alloc = xive_ipi_irq_domain_alloc, }; static int __init xive_request_ipi(void) @@ -1135,7 +1146,7 @@ static int __init xive_request_ipi(void) for_each_node(node) { struct xive_ipi_desc *xid = &xive_ipis[node]; - irq_hw_number_t ipi_hwirq = node; + struct xive_ipi_alloc_info info = { node }; /* Skip nodes without CPUs */ if (cpumask_empty(cpumask_of_node(node))) @@ -1146,9 +1157,9 @@ static int __init xive_request_ipi(void) * Since the HW interrupt number doesn't have any meaning, * simply use the node number. */ - xid->irq = irq_create_mapping(ipi_domain, ipi_hwirq); - if (!xid->irq) { - ret = -EINVAL; + xid->irq = irq_domain_alloc_irqs(ipi_domain, 1, node, &info); + if (xid->irq < 0) { + ret = xid->irq; goto out_free_xive_ipis; } |