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[216.71.219.44]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-327c3fc6675sm27402760eec.13.2026.08.20.11.54.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 20 Aug 2026 11:54:04 -0700 (PDT) Message-ID: <7335f952-1355-4281-9752-b835d5c62eff@oss.qualcomm.com> Date: Thu, 20 Aug 2026 11:54:04 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 08/11] target/hexagon: raise imprecise exception on multi-TLB match To: Brian Cain , qemu-devel@nongnu.org Cc: Laurent Vivier , Helge Deller References: <20260819013144.3264096-1-brian.cain@oss.qualcomm.com> <20260819013144.3264096-9-brian.cain@oss.qualcomm.com> From: Pierrick Bouvier Content-Language: en-US In-Reply-To: <20260819013144.3264096-9-brian.cain@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODIwMDE0MiBTYWx0ZWRfXw9heEebPhxbd Pn0tQ7n6bTMekphS5RNXYt57NxuTj+LQvXzEAUOkS791kQqQ46PC1SPry/5Tu22qJ8BQgypCeiS YTVNpwrfxHFBdikkN3SeHhOnGooUSwPtwKTUoXTRpUxcX+O73/5ODpnZ5I9DAT8YlEFDUvjINBP Jy57YQQIzT0V9NNkyYw/XJbBOIqk2F8dj3SUwn7z3gC2XY7XcsPx1lgZGnbCRHbFuzUMaPHw41U 5nwjmfqVuCp+QYri5bc3E+tnLtzBI1AneDZu/VrGlVlSK02IXpRtUUowjk4C6wkfttGnz3GsIue HQwWa6jaDt+lQNbwH3nKk92Y0k1xEk+wF1wSJZkRFRfQyE+NlG5UazYrTrk9qawmdD1kxq01dia 6B3ZtkFssI0k3dS0jJBbqFq6jep/tZwmK2DC5ifgUbu2x5kiCVcDn3rUKsgHNacHffqwmREUrjM IO2P0eH6V+Y5pJodG7A== X-Proofpoint-ORIG-GUID: HN_HcVmhwmETv79JJJf6N8KeGF1wt3DP X-Authority-Analysis: v=2.4 cv=Y7fIdBeN c=1 sm=1 tr=0 ts=6a874d4d cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=iLqgmErQAxjCjdq5jj1Aqg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=DeivO_XxE0YWQaXYBVMA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODIwMDE0MiBTYWx0ZWRfXznz8/VBMgLYI OoICj+SIpG1hxYDNiEhhfgO03IxCxS4RAMCYFQ7iVkWdXGa+Pf8+gA9573gTilrHXNiTYk2ZJpv yFgKNHCeOd8XVO8ynWdz9JtO9g5HUVE= X-Proofpoint-GUID: HN_HcVmhwmETv79JJJf6N8KeGF1wt3DP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-20_01,2026-08-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 clxscore=1015 malwarescore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 phishscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608200142 Received-SPF: pass client-ip=205.220.168.131; envelope-from=pierrick.bouvier@oss.qualcomm.com; helo=mx0a-0031df01.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 8/18/2026 6:31 PM, Brian Cain wrote: > tlbp now records a pending imprecise exception (via env->imprecise_exception) > when the lookup matches multiple entries, and the translator raises it after > the tlbp packet. Implement the HEX_EVENT_IMPRECISE delivery path so the > guest sees HEX_CAUSE_IMPRECISE_MULTI_TLB_MATCH instead of the exception > being silently dropped. > > Signed-off-by: Brian Cain > --- > include/hw/hexagon/hexagon_tlb.h | 3 ++- > target/hexagon/cpu.h | 1 + > hw/hexagon/hexagon_tlb.c | 5 ++++- > target/hexagon/hex_mmu.c | 5 ++++- > target/hexagon/hexswi.c | 37 +++++++++++++++++++++++++++++--- > target/hexagon/machine.c | 5 +++-- > target/hexagon/translate.c | 29 +++++++++++++++++++++++++ > 7 files changed, 77 insertions(+), 8 deletions(-) > Reviewed-by: Pierrick Bouvier