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irqchip/gic-v3-its: Give the percpu rdist struct its own flags field

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Later patches will require tracking some per-rdist status. Reuse the bytes
"lost" to padding within the __percpu rdist struct as a flags field, and
re-encode ->lpi_enabled within said flags.

No change in functionality intended.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211027151506.2085066-2-valentin.schneider@arm.com
This commit is contained in:
Valentin Schneider 2021-10-27 16:15:04 +01:00 committed by Marc Zyngier
parent 0fcfb00b28
commit c0cdc89072
2 changed files with 6 additions and 4 deletions
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8
drivers/irqchip/irq-gic-v3-its.c
View File

@ -46,6 +46,8 @@
#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0)
#define RDIST_FLAGS_RD_TABLES_PREALLOCATED (1 << 1)
#define RD_LOCAL_LPI_ENABLED BIT(0)
static u32 lpi_id_bits;
/*
@ -3044,7 +3046,7 @@ static void its_cpu_init_lpis(void)
phys_addr_t paddr;
u64 val, tmp;
if (gic_data_rdist()->lpi_enabled)
if (gic_data_rdist()->flags & RD_LOCAL_LPI_ENABLED)
return;
val = readl_relaxed(rbase + GICR_CTLR);
@ -3158,7 +3160,7 @@ static void its_cpu_init_lpis(void)
/* Make sure the GIC has seen the above */
dsb(sy);
out:
gic_data_rdist()->lpi_enabled = true;
gic_data_rdist()->flags |= RD_LOCAL_LPI_ENABLED;
pr_info("GICv3: CPU%d: using %s LPI pending table @%pa\n",
smp_processor_id(),
gic_data_rdist()->pend_page ? "allocated" : "reserved",
@ -5138,7 +5140,7 @@ static int redist_disable_lpis(void)
*
* If running with preallocated tables, there is nothing to do.
*/
if (gic_data_rdist()->lpi_enabled ||
if ((gic_data_rdist()->flags & RD_LOCAL_LPI_ENABLED) ||
(gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED))
return 0;

2
include/linux/irqchip/arm-gic-v3.h
View File

@ -615,7 +615,7 @@ struct rdists {
void __iomem *rd_base;
struct page *pend_page;
phys_addr_t phys_base;
bool lpi_enabled;
u64 flags;
cpumask_t *vpe_table_mask;
void *vpe_l1_base;
} __percpu *rdist;