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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=68.232.141.245; envelope-from=prvs=92346df24=Anup.Patel@wdc.com; helo=esa1.hgst.iphmx.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-riscv@nongnu.org, Anup Patel , Anup Patel , qemu-devel@nongnu.org, Atish Patra , Bin Meng Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @sharedspace.onmicrosoft.com) X-ZM-MESSAGEID: 1634979195442100001 Content-Type: text/plain; charset="utf-8" The AIA specificaiton adds interrupt filtering support for M-mode and HS-mode. Using AIA interrupt filtering M-mode and H-mode can take local interrupt 13 or above and selectively inject same local interrupt to lower privilege modes. At the moment, we don't have any local interrupts above 12 so we add dummy implementation (i.e. read zero and ignore write) of AIA interrupt filtering CSRs. Signed-off-by: Anup Patel --- target/riscv/csr.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 46d0cabbde..43ae444774 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -153,6 +153,15 @@ static RISCVException any32(CPURISCVState *env, int cs= rno) =20 } =20 +static int aia_any(CPURISCVState *env, int csrno) +{ + if (!riscv_feature(env, RISCV_FEATURE_AIA)) { + return RISCV_EXCP_ILLEGAL_INST; + } + + return any(env, csrno); +} + static int aia_any32(CPURISCVState *env, int csrno) { if (!riscv_feature(env, RISCV_FEATURE_AIA)) { @@ -515,6 +524,12 @@ static RISCVException read_zero(CPURISCVState *env, in= t csrno, return RISCV_EXCP_NONE; } =20 +static RISCVException write_ignore(CPURISCVState *env, int csrno, + target_ulong val) +{ + return RISCV_EXCP_NONE; +} + static RISCVException read_mhartid(CPURISCVState *env, int csrno, target_ulong *val) { @@ -2071,9 +2086,15 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] =3D { [CSR_MTVAL] =3D { "mtval", any, read_mtval, write_mtval }, [CSR_MIP] =3D { "mip", any, NULL, NULL, rmw_mip }, =20 + /* Virtual Interrupts for Supervisor Level (AIA) */ + [CSR_MVIEN] =3D { "mvien", aia_any, read_zero, write_ignore }, + [CSR_MVIP] =3D { "mvip", aia_any, read_zero, write_ignore }, + /* Machine-Level High-Half CSRs (AIA) */ [CSR_MIDELEGH] =3D { "midelegh", aia_any32, NULL, NULL, rmw_midelegh }, [CSR_MIEH] =3D { "mieh", aia_any32, NULL, NULL, rmw_mieh }, + [CSR_MVIENH] =3D { "mvienh", aia_any32, read_zero, write_ignore }, + [CSR_MVIPH] =3D { "mviph", aia_any32, read_zero, write_ignore }, [CSR_MIPH] =3D { "miph", aia_any32, NULL, NULL, rmw_miph }, =20 /* Supervisor Trap Setup */ @@ -2125,12 +2146,14 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] =3D { [CSR_MTINST] =3D { "mtinst", hmode, read_mtinst, writ= e_mtinst }, =20 /* Virtual Interrupts and Interrupt Priorities (H-extension with AIA) = */ + [CSR_HVIEN] =3D { "hvien", aia_hmode, read_zero, write_ign= ore }, [CSR_HVICTL] =3D { "hvictl", aia_hmode, read_hvictl, write_h= victl }, [CSR_HVIPRIO1] =3D { "hviprio1", aia_hmode, read_hviprio1, wri= te_hviprio1 }, [CSR_HVIPRIO2] =3D { "hviprio2", aia_hmode, read_hviprio2, wri= te_hviprio2 }, =20 /* Hypervisor and VS-Level High-Half CSRs (H-extension with AIA) */ [CSR_HIDELEGH] =3D { "hidelegh", aia_hmode32, NULL, NULL, rmw_hi= delegh }, + [CSR_HVIENH] =3D { "hvienh", aia_hmode32, read_zero, write_i= gnore }, [CSR_HVIPH] =3D { "hviph", aia_hmode32, NULL, NULL, rmw_hv= iph }, [CSR_HVIPRIO1H] =3D { "hviprio1h", aia_hmode32, read_hviprio1h, wr= ite_hviprio1h }, [CSR_HVIPRIO2H] =3D { "hviprio2h", aia_hmode32, read_hviprio2h, wr= ite_hviprio2h }, --=20 2.25.1