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Subject[PATCH v2 1/6] irqchip/gic-v4.1: Fix programming of GICR_VPROPBASER_4_1_SIZE
Date
The Size field of GICv4.1 VPROPBASER register indicates number of
pages minus one and together Page_Size and Size control the vPEID
width. Let's respect this requirement of the architecture.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
---
drivers/irqchip/irq-gic-v3-its.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index e5a25d97f8db..992bc72cab6f 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -2531,7 +2531,7 @@ static int allocate_vpe_l1_table(void)
npg = 1;
}

- val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, npg);
+ val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, npg - 1);

/* Right, that's the number of CPU pages we need for L1 */
np = DIV_ROUND_UP(npg * psz, PAGE_SIZE);
--
2.19.1

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