{"id":2225565,"url":"http://patchwork.ozlabs.org/api/patches/2225565/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260421074940.2916287-1-frank.chang@sifive.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260421074940.2916287-1-frank.chang@sifive.com>","list_archive_url":null,"date":"2026-04-21T07:49:40","name":"[v2] target/riscv: Mask xepc[0] only when Zc* extension is enabled","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"2f89054f52539f1dc81a6a3c406078c469faa0d0","submitter":{"id":79604,"url":"http://patchwork.ozlabs.org/api/people/79604/?format=json","name":"Frank Chang","email":"frank.chang@sifive.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260421074940.2916287-1-frank.chang@sifive.com/mbox/","series":[{"id":500752,"url":"http://patchwork.ozlabs.org/api/series/500752/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500752","date":"2026-04-21T07:49:40","name":"[v2] target/riscv: Mask xepc[0] only when Zc* extension is enabled","version":2,"mbox":"http://patchwork.ozlabs.org/series/500752/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225565/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225565/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=sifive.com header.i=@sifive.com header.a=rsa-sha256\n header.s=google header.b=hY+ON+UM;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-pl1-x633.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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable 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":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"From: Frank Chang \n\nIALIGN is 16 when the CPU supports the Zc* extension. Only xepc[0]\nshould be masked when the Zc* extension is enabled.\n\nSigned-off-by: Frank Chang \n---\n target/riscv/internals.h | 12 +++++++++---\n 1 file changed, 9 insertions(+), 3 deletions(-)","diff":"diff --git a/target/riscv/internals.h b/target/riscv/internals.h\nindex b001cbc080a..ab8dea45c90 100644\n--- a/target/riscv/internals.h\n+++ b/target/riscv/internals.h\n@@ -173,9 +173,15 @@ static inline float16 check_nanbox_bf16(CPURISCVState *env, uint64_t f)\n \n static inline target_ulong get_xepc_mask(CPURISCVState *env)\n {\n- /* When IALIGN=32, both low bits must be zero.\n- * When IALIGN=16 (has C extension), only bit 0 must be zero. */\n- if (riscv_has_ext(env, RVC)) {\n+ RISCVCPU *cpu = env_archcpu(env);\n+\n+ /*\n+ * When IALIGN=32, both low bits must be zero.\n+ * When IALIGN=16 (has C or Zc* extensions), only bit 0 must be zero.\n+ */\n+ if (riscv_has_ext(env, RVC) || cpu->cfg.ext_zca ||\n+ cpu->cfg.ext_zcb || cpu->cfg.ext_zcd || cpu->cfg.ext_zce ||\n+ cpu->cfg.ext_zcf || cpu->cfg.ext_zcmp || cpu->cfg.ext_zcmt) {\n return ~(target_ulong)1;\n } else {\n return ~(target_ulong)3;\n","prefixes":["v2"]}