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GIC fixes for 4.5-rc5: 

- EOI handling for LPIs when GICv3 is in EOImode==1
 - Another fallout from changing page size while allocating ITS tables
 - Missing memory barrier in the 32bit GICv3 code
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Merge tag 'gic-fixes-4.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull GIC fixes for 4.5-rc5 from Marc Zyngier:

- EOI handling for LPIs when GICv3 is in EOImode==1
- Another fallout from changing page size while allocating ITS tables
- Missing memory barrier in the 32bit GICv3 code
This commit is contained in:
Thomas Gleixner 2016-02-22 19:31:44 +01:00
parent bf5b1f352c 8f318526a2
commit 253baffdce
2 changed files with 8 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/include/asm/arch_gicv3.h
View File

@ -117,6 +117,7 @@ static inline u32 gic_read_iar(void)
u32 irqstat;
asm volatile("mrc " __stringify(ICC_IAR1) : "=r" (irqstat));
dsb(sy);
return irqstat;
}

18
drivers/irqchip/irq-gic-v3-its.c
View File

@ -78,6 +78,9 @@ struct its_node {
#define ITS_ITT_ALIGN SZ_256
/* Convert page order to size in bytes */
#define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o))
struct event_lpi_map {
unsigned long *lpi_map;
u16 *col_map;
@ -600,11 +603,6 @@ static void its_unmask_irq(struct irq_data *d)
lpi_set_config(d, true);
}
static void its_eoi_irq(struct irq_data *d)
{
gic_write_eoir(d->hwirq);
}
static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
bool force)
{
@ -641,7 +639,7 @@ static struct irq_chip its_irq_chip = {
.name = "ITS",
.irq_mask = its_mask_irq,
.irq_unmask = its_unmask_irq,
.irq_eoi = its_eoi_irq,
.irq_eoi = irq_chip_eoi_parent,
.irq_set_affinity = its_set_affinity,
.irq_compose_msi_msg = its_irq_compose_msi_msg,
};
@ -846,7 +844,6 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
u64 type = GITS_BASER_TYPE(val);
u64 entry_size = GITS_BASER_ENTRY_SIZE(val);
int order = get_order(psz);
int alloc_size;
int alloc_pages;
u64 tmp;
void *base;
@ -878,9 +875,8 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
}
}
alloc_size = (1 << order) * PAGE_SIZE;
retry_alloc_baser:
alloc_pages = (alloc_size / psz);
alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz);
if (alloc_pages > GITS_BASER_PAGES_MAX) {
alloc_pages = GITS_BASER_PAGES_MAX;
order = get_order(GITS_BASER_PAGES_MAX * psz);
@ -933,7 +929,7 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
shr = tmp & GITS_BASER_SHAREABILITY_MASK;
if (!shr) {
cache = GITS_BASER_nC;
__flush_dcache_area(base, alloc_size);
__flush_dcache_area(base, PAGE_ORDER_TO_SIZE(order));
}
goto retry_baser;
}
@ -966,7 +962,7 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
}
pr_info("ITS: allocated %d %s @%lx (psz %dK, shr %d)\n",
(int)(alloc_size / entry_size),
(int)(PAGE_ORDER_TO_SIZE(order) / entry_size),
its_base_type_string[type],
(unsigned long)virt_to_phys(base),
psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT);