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X-Received-From: 2607:f8b0:400e:c05::244 Subject: [Qemu-devel] [PATCH v8 18/35] RISC-V: Clear mtval/stval on exceptions without info X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sagar Karandikar , Bastian Koppelmann , Palmer Dabbelt , Michael Clark , Alistair Francis , patches@groups.riscv.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" mtval/stval must be set on all exceptions but zero is a legal value if there is no exception specific info. Placing the instruction bytes for illegal instruction exceptions in mtval/stval is an optional feature and is currently not supported by QEMU RISC-V. Cc: Sagar Karandikar Cc: Bastian Koppelmann Cc: Palmer Dabbelt Cc: Alistair Francis Signed-off-by: Michael Clark Reviewed-by: Alistair Francis --- target/riscv/helper.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/riscv/helper.c b/target/riscv/helper.c index 459fc97..3b57e13 100644 --- a/target/riscv/helper.c +++ b/target/riscv/helper.c @@ -492,6 +492,10 @@ void riscv_cpu_do_interrupt(CPUState *cs) ": badaddr 0x" TARGET_FMT_lx, env->mhartid, env->badad= dr); } env->sbadaddr =3D env->badaddr; + } else { + /* otherwise we must clear sbadaddr/stval + * todo: support populating stval on illegal instructions */ + env->sbadaddr =3D 0; } =20 target_ulong s =3D env->mstatus; @@ -513,6 +517,10 @@ void riscv_cpu_do_interrupt(CPUState *cs) ": badaddr 0x" TARGET_FMT_lx, env->mhartid, env->badad= dr); } env->mbadaddr =3D env->badaddr; + } else { + /* otherwise we must clear mbadaddr/mtval + * todo: support populating mtval on illegal instructions */ + env->mbadaddr =3D 0; } =20 target_ulong s =3D env->mstatus; --=20 2.7.0