[PATCH v3 08/59] irqchip/gic-v3-its: Split out property table allocation
From: Marc Zyngier <hidden>
Date: 2017-07-31 17:59:42
Also in:
kvm, kvmarm, lkml
Subsystem:
arm generic interrupt controller drivers, irqchip drivers, the rest · Maintainers:
Marc Zyngier, Thomas Gleixner, Linus Torvalds
Move the LPI property table allocation into its own function, as this is going to be required for those associated with VMs in the future. Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Thomas Gleixner <redacted> Signed-off-by: Marc Zyngier <redacted> --- drivers/irqchip/irq-gic-v3-its.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 3e4ac8c13e21..039626d21a73 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c@@ -899,13 +899,32 @@ static void its_lpi_free(struct event_lpi_map *map) kfree(map->col_map); } +static struct page *its_allocate_prop_table(gfp_t gfp_flags) +{ + struct page *prop_page; + + prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); + if (!prop_page) + return NULL; + + /* Priority 0xa0, Group-1, disabled */ + memset(page_address(prop_page), + LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, + LPI_PROPBASE_SZ); + + /* Make sure the GIC will observe the written configuration */ + gic_flush_dcache_to_poc(page_address(prop_page), LPI_PROPBASE_SZ); + + return prop_page; +} + + static int __init its_alloc_lpi_tables(void) { phys_addr_t paddr; lpi_id_bits = min_t(u32, gic_rdists->id_bits, ITS_MAX_LPI_NRBITS); - gic_rdists->prop_page = alloc_pages(GFP_NOWAIT, - get_order(LPI_PROPBASE_SZ)); + gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT); if (!gic_rdists->prop_page) { pr_err("Failed to allocate PROPBASE\n"); return -ENOMEM;
@@ -914,14 +933,6 @@ static int __init its_alloc_lpi_tables(void) paddr = page_to_phys(gic_rdists->prop_page); pr_info("GIC: using LPI property table @%pa\n", &paddr); - /* Priority 0xa0, Group-1, disabled */ - memset(page_address(gic_rdists->prop_page), - LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, - LPI_PROPBASE_SZ); - - /* Make sure the GIC will observe the written configuration */ - gic_flush_dcache_to_poc(page_address(gic_rdists->prop_page), LPI_PROPBASE_SZ); - return its_lpi_init(lpi_id_bits); }
--
2.11.0