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Tue, 10 Mar 2026 21:08:11 -0700 (PDT) X-Received: by 2002:a05:6870:ed93:b0:404:1358:494d with SMTP id 586e51a60fabf-4177cb39bb6mr830296fac.38.1773202091472; Tue, 10 Mar 2026 21:08:11 -0700 (PDT) From: Brian Cain To: qemu-devel@nongnu.org Cc: brian.cain@oss.qualcomm.com, philmd@linaro.org, ltaylorsimpson@gmail.com, matheus.bernardino@oss.qualcomm.com, marco.liebel@oss.qualcomm.com, quic_mburton@quicinc.com, sid.manning@oss.qualcomm.com, ale@rev.ng, anjo@rev.ng, Brian Cain Subject: [PATCH v3 04/32] target/hexagon: Implement modify SSR Date: Tue, 10 Mar 2026 21:07:30 -0700 Message-Id: <20260311040758.1068731-5-brian.cain@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260311040758.1068731-1-brian.cain@oss.qualcomm.com> References: <20260311040758.1068731-1-brian.cain@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: y8YyCLRb4C6loqOdPaN2o5vuoLbiZKE7 X-Authority-Analysis: v=2.4 cv=D7BK6/Rj c=1 sm=1 tr=0 ts=69b0eaac cx=c_pps a=Z3eh007fzM5o9awBa1HkYQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=COk6AnOGAAAA:8 a=EUspDBNiAAAA:8 a=pGsuWRCw0nJDj9UV2E4A:9 a=QEXdDO2ut3YA:10 a=eBU8X_Hb5SQ8N-bgNfv4:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzExMDAzMiBTYWx0ZWRfX8+JT6DdADX5K tR0/HxBvZYui8Ld7VVU5lRuiYVt7q/sJk2rl0foiyc5w/QgbFkIAmZdjc3eAiHrVeBnIek1j+mb fbbOlridDlEypniotucXdMcJveAih7MAQC5PmIeL2EOPIB0dWQjWBvuR8lFCsD9n8h0G6QinUbY GQVN7I662vCftAU//8aDL7lF4O4LelOEdqssOHACey6CazwJjeZ+/pXYbges3udnAY5H7q6OOOl dU428VNINm35Nh5DXB/Ki+dXBWQ+2Hroj1VkY4oKk62fYyNhocaoCgEFaJWZkCbC/a66VHbG52n aNdZwy/P37gxDXNTWP4UkJHaElFiw5Qvyn8vs/ozDBU5exSE7vj1Zre3zS7IVT1rfF1GhQAfkSR YT9/0CUfJVL6kQULxHLqeLZFssr9zS+WYxBnwTVNwTy445+u6zBSc1UxQwYxEZzEujGdpfyuj8C WH+vTFMUy9sur0agLtg== X-Proofpoint-ORIG-GUID: y8YyCLRb4C6loqOdPaN2o5vuoLbiZKE7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-10_05,2026-03-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 impostorscore=0 spamscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 clxscore=1015 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603110032 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=205.220.180.131; envelope-from=brian.cain@oss.qualcomm.com; helo=mx0b-0031df01.pphosted.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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 @qualcomm.com) X-ZM-MESSAGEID: 1773202177263158500 From: Brian Cain The per-vCPU System Status Register controls many modal behaviors of the system architecture. When the SSR is updated, we trigger the necessary effects for interrupts, privilege/MMU, and HVX context mapping. Signed-off-by: Brian Cain Reviewed-by: Taylor Simpson --- target/hexagon/cpu_helper.c | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/target/hexagon/cpu_helper.c b/target/hexagon/cpu_helper.c index c251790e5a5..c7375de39f4 100644 --- a/target/hexagon/cpu_helper.c +++ b/target/hexagon/cpu_helper.c @@ -10,6 +10,9 @@ #include "system/cpus.h" #include "hw/core/boards.h" #include "hw/hexagon/hexagon.h" +#include "hw/hexagon/hexagon_globalreg.h" +#include "hex_interrupts.h" +#include "hex_mmu.h" #include "system/runstate.h" #include "exec/cpu-interrupt.h" #include "exec/target_page.h" @@ -62,7 +65,35 @@ void hexagon_set_sys_pcycle_count(CPUHexagonState *env, = uint64_t cycles) =20 void hexagon_modify_ssr(CPUHexagonState *env, uint32_t new, uint32_t old) { - g_assert_not_reached(); + g_assert(bql_locked()); + + bool old_EX =3D GET_SSR_FIELD(SSR_EX, old); + bool old_UM =3D GET_SSR_FIELD(SSR_UM, old); + bool old_GM =3D GET_SSR_FIELD(SSR_GM, old); + bool old_IE =3D GET_SSR_FIELD(SSR_IE, old); + bool new_EX =3D GET_SSR_FIELD(SSR_EX, new); + bool new_UM =3D GET_SSR_FIELD(SSR_UM, new); + bool new_GM =3D GET_SSR_FIELD(SSR_GM, new); + bool new_IE =3D GET_SSR_FIELD(SSR_IE, new); + + if ((old_EX !=3D new_EX) || + (old_UM !=3D new_UM) || + (old_GM !=3D new_GM)) { + hex_mmu_mode_change(env); + } + + uint8_t old_asid =3D GET_SSR_FIELD(SSR_ASID, old); + uint8_t new_asid =3D GET_SSR_FIELD(SSR_ASID, new); + if (new_asid !=3D old_asid) { + CPUState *cs =3D env_cpu(env); + tlb_flush(cs); + } + + /* See if the interrupts have been enabled or we have exited EX mode */ + if ((new_IE && !old_IE) || + (!new_EX && old_EX)) { + hex_interrupt_update(env); + } } =20 void clear_wait_mode(CPUHexagonState *env) --=20 2.34.1