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bh=zN+rMi1rWywiJy4dMxE2M71nb8rplRHjdCn8M4d5z9A=; b=fVntzJWZMDMviZA7obw6incvupmhxyKFFY4zP/mRgEfZffIgkcTNcQoZOwZnYBj60/T30/ 1+5p5IUgTXa8GuJxQNIztgZqYdsp1TQxf/LvW7mD7VF97s4Hhy8guQuNROu6FS64oiP91i 0EjkWdJleupNLWkMgUne/I9FTpk3LrA= X-MC-Unique: 05mdeF0FOvWpbRXmTfB52A-1 From: Thomas Huth To: qemu-devel@nongnu.org, Richard Henderson Cc: qemu-s390x@nongnu.org, Janis Schoetterl-Glausch , David Hildenbrand Subject: [PULL 01/18] target/s390x/tcg: SPX: check validity of new prefix Date: Thu, 7 Jul 2022 09:54:09 +0200 Message-Id: <20220707075426.1163210-2-thuth@redhat.com> In-Reply-To: <20220707075426.1163210-1-thuth@redhat.com> References: <20220707075426.1163210-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 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=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1657180971033100001 Content-Type: text/plain; charset="utf-8" From: Janis Schoetterl-Glausch According to the architecture, SET PREFIX must try to access the new prefix area and recognize an addressing exception if the area is not accessible. For qemu this check prevents a crash in cpu_map_lowcore after an inaccessible prefix area has been set. Signed-off-by: Janis Schoetterl-Glausch Reviewed-by: David Hildenbrand Message-Id: <20220630094340.3646279-1-scgl@linux.ibm.com> Signed-off-by: Thomas Huth --- target/s390x/tcg/misc_helper.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/s390x/tcg/misc_helper.c b/target/s390x/tcg/misc_helper.c index aab9c47747..10dadb002a 100644 --- a/target/s390x/tcg/misc_helper.c +++ b/target/s390x/tcg/misc_helper.c @@ -158,6 +158,13 @@ void HELPER(spx)(CPUS390XState *env, uint64_t a1) if (prefix =3D=3D old_prefix) { return; } + /* + * Since prefix got aligned to 8k and memory increments are a multiple= of + * 8k checking the first page is sufficient + */ + if (!mmu_absolute_addr_valid(prefix, true)) { + tcg_s390_program_interrupt(env, PGM_ADDRESSING, GETPC()); + } =20 env->psa =3D prefix; HELPER_LOG("prefix: %#x\n", prefix); --=20 2.31.1