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Fri, 04 Jul 2025 07:21:33 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, peter.maydell@linaro.org Subject: [PATCH v4 017/108] target/arm: Implement SME2 ZERO ZT0 Date: Fri, 4 Jul 2025 08:19:40 -0600 Message-ID: <20250704142112.1018902-18-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250704142112.1018902-1-richard.henderson@linaro.org> References: <20250704142112.1018902-1-richard.henderson@linaro.org> 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::31; envelope-from=richard.henderson@linaro.org; helo=mail-oa1-x31.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, 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 @linaro.org) X-ZM-MESSAGEID: 1751639287525116600 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/syndrome.h | 1 + target/arm/tcg/translate-sme.c | 26 ++++++++++++++++++++++++++ target/arm/tcg/sme.decode | 1 + 3 files changed, 28 insertions(+) diff --git a/target/arm/syndrome.h b/target/arm/syndrome.h index 3244e0740d..c48d3b8587 100644 --- a/target/arm/syndrome.h +++ b/target/arm/syndrome.h @@ -80,6 +80,7 @@ typedef enum { SME_ET_Streaming, SME_ET_NotStreaming, SME_ET_InactiveZA, + SME_ET_InaccessibleZT0, } SMEExceptionType; =20 #define ARM_EL_EC_LENGTH 6 diff --git a/target/arm/tcg/translate-sme.c b/target/arm/tcg/translate-sme.c index e8b3578174..246f191eca 100644 --- a/target/arm/tcg/translate-sme.c +++ b/target/arm/tcg/translate-sme.c @@ -27,6 +27,19 @@ =20 #include "decode-sme.c.inc" =20 +static bool sme2_zt0_enabled_check(DisasContext *s) +{ + if (!sme_za_enabled_check(s)) { + return false; + } + if (s->zt0_excp_el) { + gen_exception_insn_el(s, 0, EXCP_UDEF, + syn_smetrap(SME_ET_InaccessibleZT0, false), + s->zt0_excp_el); + return false; + } + return true; +} =20 /* * Resolve tile.size[index] to a host pointer, where tile and index @@ -130,6 +143,19 @@ static bool trans_ZERO(DisasContext *s, arg_ZERO *a) return true; } =20 +static bool trans_ZERO_zt0(DisasContext *s, arg_ZERO_zt0 *a) +{ + if (!dc_isar_feature(aa64_sme2, s)) { + return false; + } + if (sme_enabled_check(s) && sme2_zt0_enabled_check(s)) { + tcg_gen_gvec_dup_imm(MO_64, offsetof(CPUARMState, za_state.zt0), + sizeof_field(CPUARMState, za_state.zt0), + sizeof_field(CPUARMState, za_state.zt0), 0); + } + return true; +} + static bool trans_MOVA(DisasContext *s, arg_MOVA *a) { static gen_helper_gvec_4 * const h_fns[5] =3D { diff --git a/target/arm/tcg/sme.decode b/target/arm/tcg/sme.decode index 628804e37a..dd1f983941 100644 --- a/target/arm/tcg/sme.decode +++ b/target/arm/tcg/sme.decode @@ -22,6 +22,7 @@ ### SME Misc =20 ZERO 11000000 00 001 00000000000 imm:8 +ZERO_zt0 11000000 01 001 00000000000 00000001 =20 ### SME Move into/from Array =20 --=20 2.43.0