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Mon, 7 Sep 2026 07:01:03 +0000 (GMT) From: Venkat Rao Bagalkote To: linuxppc-dev@lists.ozlabs.org Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, mkchauras@linux.ibm.com, mkchauras@gmail.com, sshegde@linux.ibm.com, ruanjinjie@huawei.com, ritesh.list@gmail.com, riteshh@linux.ibm.com, venkat88@linux.ibm.com, linux-kernel@vger.kernel.org Subject: [PATCH] powerpc/interrupt: Use early_radix_enabled() in NMI real-mode guard Date: Mon, 7 Sep 2026 12:30:58 +0530 Message-ID: <20260907070058.26338-1-venkat88@linux.ibm.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: 2Fps_JePDCXjmmOstfv-_lAJwGP-2RU- X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA3MDA3NCBTYWx0ZWRfXybpmLHr7Bqck EPjaj+0efPArnyXtHAAA20mwXMtMNdluPFbNY6GUqwbXkg8OgTbtRBp4rQd30rbJD2i4hYT8qvt qh4Eblg9zXjExiTfc1+6C1bijEYxtYY= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA3MDA3NCBTYWx0ZWRfX8CFmN7ZS5Ya0 gj7ZwCjXZ9RcgtiPRENxb2K7pa1BEFhMOyHNHbGVKkv5/8+7/tpKucyitAHABgd53H3qiCqus6b vMbcGy4nM5CkTKazAQU5nz8AkQg9r/2V30pB/qHWMH8b1WQ258M/fzjC4V4w4Q7LEA6I9qLaOZh 8UrZIcYh/hE9f8RAE5suzUNjpdp93SfEBKNZu8U+GzuJ1Ixr97a82foaUzpZEyd9/r2u31UPB8t rFpc7DMyvDknLq8XMgp4l2T8j8D7pNkbAhyL4w1no4nHexzTDATPjq/6D0JElK/nzK3MgswGI4Q 6rUAOQCM+xlGB6HQLckcCG4VZ0wv4Q/PGsnBnkk/Ir+gRdaoYmWaQPVWIeHRvjl+g94+r/dddrV R42pZkQtWrVSc3EKaolo6Dv9aIXQZUWv0plAgQFxq/WXEtK9bq0UY71Clf9wYH4fFiy3fGgW9QC fmpWEuOgsfuGqwhxfXw== X-Authority-Analysis: v=2.4 cv=JaKMa0KV c=1 sm=1 tr=0 ts=6a9e613a cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=gZpiDA7bhwe5fsxDx_8A:9 X-Proofpoint-GUID: MWdhOWnnSkoJLfRMe_OTuiHmUgXA5o60 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-07_01,2026-09-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609070074 radix_enabled() uses a jump label which is only valid after mmu_feature_keys_init() is called. Before that point, on a pSeries hash guest, early_check_vec5() clears MMU_FTR_TYPE_RADIX in cur_cpu_spec->mmu_features but the jump label has not yet been patched, so radix_enabled() incorrectly returns true. Replace radix_enabled() with early_radix_enabled() which does a plain bitmask check against cur_cpu_spec->mmu_features and is correct at all times, including before jump label initialization. Add the missing #include since early_radix_enabled() is declared there. Signed-off-by: Venkat Rao Bagalkote --- arch/powerpc/include/asm/interrupt.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h index 1b45a49e9bed..36a654e780f7 100644 --- a/arch/powerpc/include/asm/interrupt.h +++ b/arch/powerpc/include/asm/interrupt.h @@ -71,6 +71,7 @@ #include #include +#include #ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG /* @@ -290,7 +291,7 @@ interrupt_handler long func(struct pt_regs *regs) \ state = irqentry_nmi_enter(regs); \ } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && \ firmware_has_feature(FW_FEATURE_LPAR) && \ - !radix_enabled()) { \ + !early_radix_enabled()) { \ /* no nmi_entry for a pseries hash guest \ * taking a real mode exception */ \ } else if (IS_ENABLED(CONFIG_KASAN)) { \ @@ -307,7 +308,7 @@ interrupt_handler long func(struct pt_regs *regs) \ irqentry_nmi_exit(regs, state); \ } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && \ firmware_has_feature(FW_FEATURE_LPAR) && \ - !radix_enabled()) { \ + !early_radix_enabled()) { \ /* no nmi_exit for a pseries hash guest \ * taking a real mode exception */ \ } else if (IS_ENABLED(CONFIG_KASAN)) { \ -- 2.45.2