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Fri, 27 Nov 2020 04:44:40 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.45.115]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Fri, 27 Nov 2020 04:44:40 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [PATCH v7 04/22] powerpc/book3s64/kuap/kuep: Move uamor setup to pkey init Date: Fri, 27 Nov 2020 10:14:06 +0530 Message-Id: <20201127044424.40686-5-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201127044424.40686-1-aneesh.kumar@linux.ibm.com> References: <20201127044424.40686-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-11-27_01:2020-11-26, 2020-11-27 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 clxscore=1015 bulkscore=0 impostorscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 mlxscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011270021 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Aneesh Kumar K.V" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patch consolidates UAMOR update across pkey, kuap and kuep features. The boot cpu initialize UAMOR via pkey init and both radix/hash do the secondary cpu UAMOR init in early_init_mmu_secondary. We don't check for mmu_feature in radix secondary init because UAMOR is a supported SPRN with all CPUs supporting radix translation. The old code was not updating UAMOR if we had smap disabled and smep enabled. This change handles that case. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/book3s64/radix_pgtable.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 3adcf730f478..f5f248d44d5c 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -620,9 +620,6 @@ void setup_kuap(bool disabled) cur_cpu_spec->mmu_features |= MMU_FTR_RADIX_KUAP; } - /* Make sure userspace can't change the AMR */ - mtspr(SPRN_UAMOR, 0); - /* * Set the default kernel AMR values on all cpus. */ @@ -721,6 +718,9 @@ void radix__early_init_mmu_secondary(void) radix__switch_mmu_context(NULL, &init_mm); tlbiel_all(); + + /* Make sure userspace can't change the AMR */ + mtspr(SPRN_UAMOR, 0); } void radix__mmu_cleanup_all(void) -- 2.28.0