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Fri, 11 Feb 2022 16:02:03 -0800 (PST) Received: from toolbox.wdc.com (unknown [10.225.165.96]) by usg-ed-osssrv.wdc.com (Postfix) with ESMTPSA id 4JwVyv6dkPz1Rwrw; Fri, 11 Feb 2022 16:01:59 -0800 (PST) From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, Anup Patel , Anup Patel , Alistair Francis , Frank Chang Subject: [PULL 14/40] target/riscv: Implement hgeie and hgeip CSRs Date: Sat, 12 Feb 2022 10:00:05 +1000 Message-Id: <20220212000031.3946524-15-alistair.francis@opensource.wdc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220212000031.3946524-1-alistair.francis@opensource.wdc.com> References: <20220212000031.3946524-1-alistair.francis@opensource.wdc.com> MIME-Version: 1.0 Received-SPF: pass client-ip=216.71.154.45; envelope-from=prvs=03511bb56=alistair.francis@opensource.wdc.com; helo=esa6.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, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Anup Patel The hgeie and hgeip CSRs are required for emulating an external interrupt controller capable of injecting virtual external interrupt to Guest/VM running at VS-level. Signed-off-by: Anup Patel Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Frank Chang Message-id: 20220204174700.534953-4-anup@brainfault.org Signed-off-by: Alistair Francis --- target/riscv/cpu.h | 5 +++ target/riscv/cpu_bits.h | 1 + target/riscv/cpu.c | 67 +++++++++++++++++++++++++++------------ target/riscv/cpu_helper.c | 37 +++++++++++++++++++-- target/riscv/csr.c | 43 +++++++++++++++++-------- target/riscv/machine.c | 6 ++-- 6 files changed, 121 insertions(+), 38 deletions(-) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index aacc997d56..f030cb58b2 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -161,6 +161,7 @@ struct CPURISCVState { target_ulong priv; /* This contains QEMU specific information about the virt state. */ target_ulong virt; + target_ulong geilen; target_ulong resetvec; target_ulong mhartid; @@ -198,6 +199,8 @@ struct CPURISCVState { target_ulong htval; target_ulong htinst; target_ulong hgatp; + target_ulong hgeie; + target_ulong hgeip; uint64_t htimedelta; /* Upper 64-bits of 128-bit CSRs */ @@ -391,6 +394,8 @@ int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs, int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); bool riscv_cpu_fp_enabled(CPURISCVState *env); +target_ulong riscv_cpu_get_geilen(CPURISCVState *env); +void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen); bool riscv_cpu_vector_enabled(CPURISCVState *env); bool riscv_cpu_virt_enabled(CPURISCVState *env); void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable); diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index e1256a9982..a541705760 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -542,6 +542,7 @@ typedef enum RISCVException { #define IRQ_M_EXT 11 #define IRQ_S_GEXT 12 #define IRQ_LOCAL_MAX 16 +#define IRQ_LOCAL_GUEST_MAX (TARGET_LONG_BITS - 1) /* mip masks */ #define MIP_USIP (1 << IRQ_U_SOFT) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index e1224d26dc..f1c268415a 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -663,27 +663,53 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp) static void riscv_cpu_set_irq(void *opaque, int irq, int level) { RISCVCPU *cpu = RISCV_CPU(opaque); + CPURISCVState *env = &cpu->env; - switch (irq) { - case IRQ_U_SOFT: - case IRQ_S_SOFT: - case IRQ_VS_SOFT: - case IRQ_M_SOFT: - case IRQ_U_TIMER: - case IRQ_S_TIMER: - case IRQ_VS_TIMER: - case IRQ_M_TIMER: - case IRQ_U_EXT: - case IRQ_S_EXT: - case IRQ_VS_EXT: - case IRQ_M_EXT: - if (kvm_enabled()) { - kvm_riscv_set_irq(cpu, irq, level); - } else { - riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level)); + if (irq < IRQ_LOCAL_MAX) { + switch (irq) { + case IRQ_U_SOFT: + case IRQ_S_SOFT: + case IRQ_VS_SOFT: + case IRQ_M_SOFT: + case IRQ_U_TIMER: + case IRQ_S_TIMER: + case IRQ_VS_TIMER: + case IRQ_M_TIMER: + case IRQ_U_EXT: + case IRQ_S_EXT: + case IRQ_VS_EXT: + case IRQ_M_EXT: + if (kvm_enabled()) { + kvm_riscv_set_irq(cpu, irq, level); + } else { + riscv_cpu_update_mip(cpu, 1 << irq, BOOL_TO_MASK(level)); + } + break; + default: + g_assert_not_reached(); } - break; - default: + } else if (irq < (IRQ_LOCAL_MAX + IRQ_LOCAL_GUEST_MAX)) { + /* Require H-extension for handling guest local interrupts */ + if (!riscv_has_ext(env, RVH)) { + g_assert_not_reached(); + } + + /* Compute bit position in HGEIP CSR */ + irq = irq - IRQ_LOCAL_MAX + 1; + if (env->geilen < irq) { + g_assert_not_reached(); + } + + /* Update HGEIP CSR */ + env->hgeip &= ~((target_ulong)1 << irq); + if (level) { + env->hgeip |= (target_ulong)1 << irq; + } + + /* Update mip.SGEIP bit */ + riscv_cpu_update_mip(cpu, MIP_SGEIP, + BOOL_TO_MASK(!!(env->hgeie & env->hgeip))); + } else { g_assert_not_reached(); } } @@ -696,7 +722,8 @@ static void riscv_cpu_init(Object *obj) cpu_set_cpustate_pointers(cpu); #ifndef CONFIG_USER_ONLY - qdev_init_gpio_in(DEVICE(cpu), riscv_cpu_set_irq, IRQ_LOCAL_MAX); + qdev_init_gpio_in(DEVICE(cpu), riscv_cpu_set_irq, + IRQ_LOCAL_MAX + IRQ_LOCAL_GUEST_MAX); #endif /* CONFIG_USER_ONLY */ } diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 327a2c4f1d..698389ba1b 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -159,7 +159,11 @@ static int riscv_cpu_local_irq_pending(CPURISCVState *env) target_ulong mstatus_mie = get_field(env->mstatus, MSTATUS_MIE); target_ulong mstatus_sie = get_field(env->mstatus, MSTATUS_SIE); - target_ulong pending = env->mip & env->mie; + target_ulong vsgemask = + (target_ulong)1 << get_field(env->hstatus, HSTATUS_VGEIN); + target_ulong vsgein = (env->hgeip & vsgemask) ? MIP_VSEIP : 0; + + target_ulong pending = (env->mip | vsgein) & env->mie; target_ulong mie = env->priv < PRV_M || (env->priv == PRV_M && mstatus_mie); @@ -279,6 +283,28 @@ void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env) } } +target_ulong riscv_cpu_get_geilen(CPURISCVState *env) +{ + if (!riscv_has_ext(env, RVH)) { + return 0; + } + + return env->geilen; +} + +void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen) +{ + if (!riscv_has_ext(env, RVH)) { + return; + } + + if (geilen > (TARGET_LONG_BITS - 1)) { + return; + } + + env->geilen = geilen; +} + bool riscv_cpu_virt_enabled(CPURISCVState *env) { if (!riscv_has_ext(env, RVH)) { @@ -322,9 +348,14 @@ uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value) { CPURISCVState *env = &cpu->env; CPUState *cs = CPU(cpu); - uint32_t old = env->mip; + uint32_t gein, vsgein = 0, old = env->mip; bool locked = false; + if (riscv_cpu_virt_enabled(env)) { + gein = get_field(env->hstatus, HSTATUS_VGEIN); + vsgein = (env->hgeip & (1ULL << gein)) ? MIP_VSEIP : 0; + } + if (!qemu_mutex_iothread_locked()) { locked = true; qemu_mutex_lock_iothread(); @@ -332,7 +363,7 @@ uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value) env->mip = (env->mip & ~mask) | (value & mask); - if (env->mip) { + if (env->mip | vsgein) { cpu_interrupt(cs, CPU_INTERRUPT_HARD); } else { cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); diff --git a/target/riscv/csr.c b/target/riscv/csr.c index c635ffb089..b23195b479 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -883,7 +883,7 @@ static RISCVException rmw_mip(CPURISCVState *env, int csrno, RISCVCPU *cpu = env_archcpu(env); /* Allow software control of delegable interrupts not claimed by hardware */ target_ulong mask = write_mask & delegable_ints & ~env->miclaim; - uint32_t old_mip; + uint32_t gin, old_mip; if (mask) { old_mip = riscv_cpu_update_mip(cpu, mask, (new_value & mask)); @@ -891,6 +891,11 @@ static RISCVException rmw_mip(CPURISCVState *env, int csrno, old_mip = env->mip; } + if (csrno != CSR_HVIP) { + gin = get_field(env->hstatus, HSTATUS_VGEIN); + old_mip |= (env->hgeip & ((target_ulong)1 << gin)) ? MIP_VSEIP : 0; + } + if (ret_value) { *ret_value = old_mip; } @@ -1089,7 +1094,7 @@ static RISCVException rmw_vsip(CPURISCVState *env, int csrno, target_ulong new_value, target_ulong write_mask) { /* Shift the S bits to their VS bit location in mip */ - int ret = rmw_mip(env, 0, ret_value, new_value << 1, + int ret = rmw_mip(env, csrno, ret_value, new_value << 1, (write_mask << 1) & vsip_writable_mask & env->hideleg); if (ret_value) { @@ -1109,7 +1114,7 @@ static RISCVException rmw_sip(CPURISCVState *env, int csrno, if (riscv_cpu_virt_enabled(env)) { ret = rmw_vsip(env, CSR_VSIP, ret_value, new_value, write_mask); } else { - ret = rmw_mip(env, CSR_MSTATUS, ret_value, new_value, + ret = rmw_mip(env, csrno, ret_value, new_value, write_mask & env->mideleg & sip_writable_mask); } @@ -1228,7 +1233,7 @@ static RISCVException rmw_hvip(CPURISCVState *env, int csrno, target_ulong *ret_value, target_ulong new_value, target_ulong write_mask) { - int ret = rmw_mip(env, 0, ret_value, new_value, + int ret = rmw_mip(env, csrno, ret_value, new_value, write_mask & hvip_writable_mask); if (ret_value) { @@ -1241,7 +1246,7 @@ static RISCVException rmw_hip(CPURISCVState *env, int csrno, target_ulong *ret_value, target_ulong new_value, target_ulong write_mask) { - int ret = rmw_mip(env, 0, ret_value, new_value, + int ret = rmw_mip(env, csrno, ret_value, new_value, write_mask & hip_writable_mask); if (ret_value) { @@ -1278,15 +1283,27 @@ static RISCVException write_hcounteren(CPURISCVState *env, int csrno, return RISCV_EXCP_NONE; } -static RISCVException write_hgeie(CPURISCVState *env, int csrno, - target_ulong val) +static RISCVException read_hgeie(CPURISCVState *env, int csrno, + target_ulong *val) { if (val) { - qemu_log_mask(LOG_UNIMP, "No support for a non-zero GEILEN."); + *val = env->hgeie; } return RISCV_EXCP_NONE; } +static RISCVException write_hgeie(CPURISCVState *env, int csrno, + target_ulong val) +{ + /* Only GEILEN:1 bits implemented and BIT0 is never implemented */ + val &= ((((target_ulong)1) << env->geilen) - 1) << 1; + env->hgeie = val; + /* Update mip.SGEIP bit */ + riscv_cpu_update_mip(env_archcpu(env), MIP_SGEIP, + BOOL_TO_MASK(!!(env->hgeie & env->hgeip))); + return RISCV_EXCP_NONE; +} + static RISCVException read_htval(CPURISCVState *env, int csrno, target_ulong *val) { @@ -1314,11 +1331,11 @@ static RISCVException write_htinst(CPURISCVState *env, int csrno, return RISCV_EXCP_NONE; } -static RISCVException write_hgeip(CPURISCVState *env, int csrno, - target_ulong val) +static RISCVException read_hgeip(CPURISCVState *env, int csrno, + target_ulong *val) { if (val) { - qemu_log_mask(LOG_UNIMP, "No support for a non-zero GEILEN."); + *val = env->hgeip; } return RISCV_EXCP_NONE; } @@ -2148,10 +2165,10 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = { [CSR_HIP] = { "hip", hmode, NULL, NULL, rmw_hip }, [CSR_HIE] = { "hie", hmode, read_hie, write_hie }, [CSR_HCOUNTEREN] = { "hcounteren", hmode, read_hcounteren, write_hcounteren }, - [CSR_HGEIE] = { "hgeie", hmode, read_zero, write_hgeie }, + [CSR_HGEIE] = { "hgeie", hmode, read_hgeie, write_hgeie }, [CSR_HTVAL] = { "htval", hmode, read_htval, write_htval }, [CSR_HTINST] = { "htinst", hmode, read_htinst, write_htinst }, - [CSR_HGEIP] = { "hgeip", hmode, read_zero, write_hgeip }, + [CSR_HGEIP] = { "hgeip", hmode, read_hgeip, NULL }, [CSR_HGATP] = { "hgatp", hmode, read_hgatp, write_hgatp }, [CSR_HTIMEDELTA] = { "htimedelta", hmode, read_htimedelta, write_htimedelta }, [CSR_HTIMEDELTAH] = { "htimedeltah", hmode32, read_htimedeltah, write_htimedeltah }, diff --git a/target/riscv/machine.c b/target/riscv/machine.c index 740e11fcff..7d72c2d8a6 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -78,8 +78,8 @@ static bool hyper_needed(void *opaque) static const VMStateDescription vmstate_hyper = { .name = "cpu/hyper", - .version_id = 1, - .minimum_version_id = 1, + .version_id = 2, + .minimum_version_id = 2, .needed = hyper_needed, .fields = (VMStateField[]) { VMSTATE_UINTTL(env.hstatus, RISCVCPU), @@ -89,6 +89,8 @@ static const VMStateDescription vmstate_hyper = { VMSTATE_UINTTL(env.htval, RISCVCPU), VMSTATE_UINTTL(env.htinst, RISCVCPU), VMSTATE_UINTTL(env.hgatp, RISCVCPU), + VMSTATE_UINTTL(env.hgeie, RISCVCPU), + VMSTATE_UINTTL(env.hgeip, RISCVCPU), VMSTATE_UINT64(env.htimedelta, RISCVCPU), VMSTATE_UINT64(env.vsstatus, RISCVCPU),