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mx.dynu.com; dkim=pass; dmarc=pass DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=borto.fr; s=mail; t=1790379727; bh=6QoBM2Q+2htXMJeWNC4OsA0vxD8yomEVCrzi9Xhr3Ic=; h=From:To:Cc:Subject:Date:From; b=e55udqTeK10pG5DDocFqCAB9BPNKUJa/Mp8EeLSp8djiohS6mVfj8weH3cjjTHhNi lStjftlbJDj29zvoYPTbB816BIcTNzQznDmUh56pT0rBULpBsFCVcUM6wMB05pxwc9 k24JDFWLtCpX6495kM4UMS00Wg9LolfLQtac0TBU= From: Jean-Francois Bortolotti To: qemu-devel@nongnu.org Cc: Jean-Francois Bortolotti , Peter Maydell , qemu-arm@nongnu.org (open list:ARM TCG CPUs) Subject: [PATCH] target/arm: Fix PMSAv8 shareability decode for R-profile MPU regions Date: Sat, 26 Sep 2026 01:41:36 +0200 Message-Id: <20260925234136.1182108-1-jeff@borto.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: mx.dynu.com; dkim=pass; dmarc=pass Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=168.235.95.80; envelope-from=jeff@borto.fr; helo=relay.wiredblade.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 25 Sep 2026 20:14:47 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @borto.fr) X-ZM-MESSAGEID: 1790381738079158500 Content-Type: text/plain; charset="utf-8" In Armv8-R AArch32 the shareability field of an MPU region lives in PRBAR, not PRLAR: PRBAR: [31:6] BASE [5] RES0 [4:3] SH [2:1] AP [0] XN PRLAR: [31:6] LIMIT [5:4] RES0 [3:1] AttrIndx [0] EN (Arm Cortex-R52 TRM 100026_0103_00_en: Tables 3-80 and 3-83 for HPRBAR/HPRLAR, Tables 3-124 and 3-127 for PRBAR/PRLAR.) Without this fix, address translation instructions like ATS1HR will return wrong value for PAR.SH. Signed-off-by: Jean-Francois Bortolotti --- target/arm/ptw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index a29de0385f..663a4862a4 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -3085,7 +3085,7 @@ bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t add= ress, if (!arm_feature(env, ARM_FEATURE_M)) { uint8_t attrindx =3D extract32(matched_rlar, 1, 3); uint64_t mair =3D env->cp15.mair_el[regime_el(mmu_idx)]; - uint8_t sh =3D extract32(matched_rlar, 3, 2); + uint8_t sh =3D extract32(matched_rbar, 3, 2); =20 if (regime_sctlr(env, mmu_idx) & SCTLR_WXN && result->f.prot & PAGE_WRITE && mmu_idx !=3D ARMMMUIdx_Stag= e2) { --=20 2.34.1