Hello Jiaxun
On Mon, Apr 24, 2023 at 11:31:55AM +0100, Jiaxun Yang wrote:
When a GIC local interrupt is not routable, it's vl_map will be used to control some internal states for core (providing IPTI, IPPCI, IPFDC
input signal for core). Overriding it will interfere core's intetrupt
s/intetrupt/interrupt
controller.
Do not touch vl_map if a local interrupt is not routable, we are not going to remap it.
Before dd098a0e0319 (" irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()"), if a local interrupt is not routable, then it won't be requested from GIC Local domain, and thus gic_all_vpes_irq_cpu_online won't be called for that particular interrupt.
Fixes: dd098a0e0319 (" irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()") Cc: stable@vger.kernel.org Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com
My system doesn't have VPEs but 2x MIPS32 P5600 cores with GIC enabled as EIC device so I can't fully test this change, but at the very least it looks reasonable. Indeed performing the local IRQs routing setups for the non-routable IRQs looks invalid. A similar change can be spotted in the gic_irq_domain_map() method implementation.
drivers/irqchip/irq-mips-gic.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 046c355e120b..b568d55ef7c5 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -399,6 +399,8 @@ static void gic_all_vpes_irq_cpu_online(void) unsigned int intr = local_intrs[i]; struct gic_all_vpes_chip_data *cd;
if (!gic_local_irq_is_routable(intr))continue;
Please add newline here to distinguish the skip-step code chunk and the setup code so the look would look a tiny bit more readable.
cd = &gic_all_vpes_chip_data[intr]; write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map); if (cd->mask)
Other than that the change looks good. Thanks.
Reviewed-by: Serge Semin fancer.lancer@gmail.com
-Serge(y)
-- 2.34.1