linux-kernel - [irqchip: irq/irqchip-fixes] irqchip/mips-gic: Don't touch vl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <168423255748.404.10699109053196675106.tip-bot2@tip-bot2>
Date:   Tue, 16 May 2023 10:22:37 -0000
From:   "irqchip-bot for Jiaxun Yang" <tip-bot2@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Marc Zyngier <maz@...nel.org>, tglx@...utronix.de
Subject: [irqchip: irq/irqchip-fixes] irqchip/mips-gic: Don't touch vl_map if
 a local interrupt is not routable

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     2c6c9c049510163090b979ea5f92a68ae8d93c45
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/2c6c9c049510163090b979ea5f92a68ae8d93c45
Author:        Jiaxun Yang <jiaxun.yang@...goat.com>
AuthorDate:    Mon, 24 Apr 2023 11:31:55 +01:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Tue, 16 May 2023 10:59:28 +01:00

irqchip/mips-gic: Don't touch vl_map if a local interrupt is not routable

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
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@...r.kernel.org
Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Reviewed-by: Serge Semin <fancer.lancer@...il.com>
Tested-by: Serge Semin <fancer.lancer@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20230424103156.66753-2-jiaxun.yang@flygoat.com
---
 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 046c355..b568d55 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;
 		cd = &gic_all_vpes_chip_data[intr];
 		write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map);
 		if (cd->mask)