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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::42f; envelope-from=palmer@rivosinc.com; helo=mail-pf1-x42f.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-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 @rivosinc-com.20210112.gappssmtp.com) X-ZM-MESSAGEID: 1677833087095100001 Content-Type: text/plain; charset="utf-8" From: Weiwei Li henvcfg.PBMTE/STCE are read-only zero if menvcfg.PBMTE/STCE are zero. Signed-off-by: Weiwei Li Signed-off-by: Junqiang Wang Reviewed-by: Daniel Henrique Barboza Message-ID: <20230224040852.37109-3-liweiwei@iscas.ac.cn> Signed-off-by: Palmer Dabbelt --- target/riscv/csr.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index b20b00a9a7..b86c1aa6fa 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -1956,7 +1956,11 @@ static RISCVException read_henvcfg(CPURISCVState *en= v, int csrno, return ret; } =20 - *val =3D env->henvcfg; + /* + * henvcfg.pbmte is read_only 0 when menvcfg.pbmte =3D 0 + * henvcfg.stce is read_only 0 when menvcfg.stce =3D 0 + */ + *val =3D env->henvcfg & (~(HENVCFG_PBMTE | HENVCFG_STCE) | env->menvcf= g); return RISCV_EXCP_NONE; } =20 @@ -1972,7 +1976,7 @@ static RISCVException write_henvcfg(CPURISCVState *en= v, int csrno, } =20 if (riscv_cpu_mxl(env) =3D=3D MXL_RV64) { - mask |=3D HENVCFG_PBMTE | HENVCFG_STCE; + mask |=3D env->menvcfg & (HENVCFG_PBMTE | HENVCFG_STCE); } =20 env->henvcfg =3D (env->henvcfg & ~mask) | (val & mask); @@ -1990,14 +1994,15 @@ static RISCVException read_henvcfgh(CPURISCVState *= env, int csrno, return ret; } =20 - *val =3D env->henvcfg >> 32; + *val =3D (env->henvcfg & (~(HENVCFG_PBMTE | HENVCFG_STCE) | + env->menvcfg)) >> 32; return RISCV_EXCP_NONE; } =20 static RISCVException write_henvcfgh(CPURISCVState *env, int csrno, target_ulong val) { - uint64_t mask =3D HENVCFG_PBMTE | HENVCFG_STCE; + uint64_t mask =3D env->menvcfg & (HENVCFG_PBMTE | HENVCFG_STCE); uint64_t valh =3D (uint64_t)val << 32; RISCVException ret; =20 --=20 2.39.2