From: Wudi Wang wangwudi@hisilicon.com
commit b383a42ca523ce54bcbd63f7c8f3cf974abc9b9a upstream.
INVALL CMD specifies that the ITS must ensure any caching associated with the interrupt collection defined by ICID is consistent with the LPI configuration tables held in memory for all Redistributors. SYNC is required to ensure that INVALL is executed.
Currently, LPI configuration data may be inconsistent with that in the memory within a short period of time after the INVALL command is executed.
Signed-off-by: Wudi Wang wangwudi@hisilicon.com Signed-off-by: Shaokun Zhang zhangshaokun@hisilicon.com Signed-off-by: Marc Zyngier maz@kernel.org Fixes: cc2d3216f53c ("irqchip: GICv3: ITS command queue") Link: https://lore.kernel.org/r/20211208015429.5007-1-zhangshaokun@hisilicon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/irqchip/irq-gic-v3-its.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -369,7 +369,7 @@ static struct its_collection *its_build_
its_fixup_cmd(cmd);
- return NULL; + return desc->its_invall_cmd.col; }
static u64 its_cmd_ptr_to_offset(struct its_node *its,