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Tue, 16 Jul 2024 09:27:14 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org Cc: Nicholas Piggin , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Barrat?= , Harsh Prateek Bora , qemu-devel@nongnu.org Subject: [PATCH v3 13/19] ppc/pnv: Implement Power9 CPU core thread state indirect register Date: Wed, 17 Jul 2024 02:26:09 +1000 Message-ID: <20240716162617.32161-14-npiggin@gmail.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240716162617.32161-1-npiggin@gmail.com> References: <20240716162617.32161-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2001:4860:4864:20::2a; envelope-from=npiggin@gmail.com; helo=mail-oa1-x2a.google.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1721147394956116600 Content-Type: text/plain; charset="utf-8" Power9 CPUs have a core thread state register accessible via SPRC/SPRD indirect registers. This register includes a bit for big-core mode, which skiboot requires. Signed-off-by: Nicholas Piggin Reviewed-by: C=C3=A9dric Le Goater --- target/ppc/misc_helper.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/target/ppc/misc_helper.c b/target/ppc/misc_helper.c index 692e48e6bc..e69236d2de 100644 --- a/target/ppc/misc_helper.c +++ b/target/ppc/misc_helper.c @@ -319,6 +319,23 @@ target_ulong helper_load_sprd(CPUPPCState *env) case 0: /* SCRATCH0-3 */ case 1: /* SCRATCH4-7 */ return pc->scratch[(sprc >> 3) & 0x7]; + + case 0x1e0: /* core thread state */ + if (env->excp_model =3D=3D POWERPC_EXCP_POWER9) { + /* + * Only implement for POWER9 because skiboot uses it to check + * big-core mode. Other bits are unimplemented so we would + * prefer to get unimplemented message on POWER10 if it were + * used anywhere. + */ + if (pc->big_core) { + return PPC_BIT(63); + } else { + return 0; + } + } + /* fallthru */ + default: qemu_log_mask(LOG_UNIMP, "mfSPRD: Unimplemented SPRC:0x" TARGET_FMT_lx"\n", sprc); --=20 2.45.1