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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: pTlTIu0fZF7kZn1bJfm9xIUNw2feeY7blvjTmSb8ZeoNdNdXYrCOZ3mi2iZ7vyjeHBozKLUhnGWdIFdmdYEBPbWxbv2lahXSFdfvTYXdqQojfEeCSmnlYTIrRfeIY4msfqkqrGMaPWz2sQim6qhnLg6128F+0h9pkqbY3CPB1ZCUDR1hpfxyNP5kXckP7fpmHhPwAeQzzoTbBWmXxbPTCAtBRCjDhZfwZxtD5ozutXVARh3xPFAMZjztLhBrHMyxcpY3Od4nZFzo3IMHRMBf1A4Gq8PkyksDNqirkFrTkTthimZt5iZ4DifFTfZQuLRE9hI4xHmoUwd473Eld1m2G6DofofkcM+wPzNzERvB5FqD5uRwaZCEiKSSR0JHJK4+do2IIlKpWyOZL4zstP1RDLY69Q5f3lRCvSzQn0jeePLPzojnQitGtjqv0qTj8oOW X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Sep 2026 16:50:27.0803 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9eea6e59-8dc9-486b-b19a-08df0d001e7a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: MI3PEPF0000847E.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR08MB9608 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260907_095037_160135_29B04A12 X-CRM114-Status: GOOD ( 10.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In addition to EN, ICC_CR0_EL1 contains other fields, such as LINK and LINK_IDLE. The driver only needs to modify EN, and must preserve the values of all other fields when enabling or disabling the CPU interface. Define the missing LINK and LINK_IDLE fields, and use read-modify-write accesses to update EN without affecting the rest of ICC_CR0_EL1. Fixes: 7ec80fb3f025 ("irqchip/gic-v5: Add GICv5 PPI support") Reported-by: Sashiko Closes: https://lore.kernel.org/r/20260807121703.D4B7A1F00A3A@smtp.kernel.o= rg Signed-off-by: Sascha Bischoff --- arch/arm64/tools/sysreg | 4 +++- drivers/irqchip/irq-gic-v5.c | 6 ++++-- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index 94bf065c8ac7..e2d37ee221b8 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -3761,7 +3761,9 @@ Sysreg ICC_CR0_EL1 3 1 12 0 1 Res0 63:39 Field 38 PID Field 37:32 IPPT -Res0 31:1 +Res0 31:3 +Field 2 LINK_IDLE +Field 1 LINK Field 0 EN EndSysreg =20 diff --git a/drivers/irqchip/irq-gic-v5.c b/drivers/irqchip/irq-gic-v5.c index ac2d423b1723..5f2551cf077d 100644 --- a/drivers/irqchip/irq-gic-v5.c +++ b/drivers/irqchip/irq-gic-v5.c @@ -974,7 +974,8 @@ static void gicv5_cpu_disable_interrupts(void) { u64 cr0; =20 - cr0 =3D FIELD_PREP(ICC_CR0_EL1_EN, 0); + cr0 =3D read_sysreg_s(SYS_ICC_CR0_EL1); + cr0 &=3D ~ICC_CR0_EL1_EN_MASK; write_sysreg_s(cr0, SYS_ICC_CR0_EL1); isb(); } @@ -991,7 +992,8 @@ static void gicv5_cpu_enable_interrupts(void) pcr =3D FIELD_PREP(ICC_PCR_EL1_PRIORITY, GICV5_IRQ_PRI_MI); write_sysreg_s(pcr, SYS_ICC_PCR_EL1); =20 - cr0 =3D FIELD_PREP(ICC_CR0_EL1_EN, 1); + cr0 =3D read_sysreg_s(SYS_ICC_CR0_EL1); + cr0 |=3D ICC_CR0_EL1_EN_MASK; write_sysreg_s(cr0, SYS_ICC_CR0_EL1); } =20 --=20 2.34.1