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[PATCH v1 05/12] target/riscv: Implement kvm_arch_put_registers

Yifei Jiang posted 12 patches 4 years, 2 months ago
Maintainers: Bin Meng <bin.meng@windriver.com>, Paolo Bonzini <pbonzini@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, "Michael S. Tsirkin" <mst@redhat.com>
There is a newer version of this series
[PATCH v1 05/12] target/riscv: Implement kvm_arch_put_registers
Posted by Yifei Jiang 4 years, 2 months ago 
Put GPR CSR and FP registers to kvm by KVM_SET_ONE_REG ioctl

Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Mingwang Li <limingwang@huawei.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/kvm.c | 141 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 140 insertions(+), 1 deletion(-)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index b49c24be0a..5fe5ca4434 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -90,6 +90,31 @@ static int kvm_riscv_get_regs_core(CPUState *cs)
     return ret;
 }
 
+static int kvm_riscv_put_regs_core(CPUState *cs)
+{
+    int ret = 0;
+    int i;
+    target_ulong reg;
+    CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+    reg = env->pc;
+    ret = kvm_set_one_reg(cs, RISCV_CORE_REG(env, regs.pc), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    for (i = 1; i < 32; i++) {
+        uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i);
+        reg = env->gpr[i];
+        ret = kvm_set_one_reg(cs, id, &reg);
+        if (ret) {
+            return ret;
+        }
+    }
+
+    return ret;
+}
+
 static int kvm_riscv_get_regs_csr(CPUState *cs)
 {
     int ret = 0;
@@ -153,6 +178,69 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
     return ret;
 }
 
+static int kvm_riscv_put_regs_csr(CPUState *cs)
+{
+    int ret = 0;
+    target_ulong reg;
+    CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+    reg = env->mstatus;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sstatus), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->mie;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sie), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->stvec;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stvec), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->sscratch;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sscratch), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->sepc;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sepc), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->scause;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, scause), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->stval;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stval), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->mip;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sip), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    reg = env->satp;
+    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, satp), &reg);
+    if (ret) {
+        return ret;
+    }
+
+    return ret;
+}
+
 static int kvm_riscv_get_regs_fp(CPUState *cs)
 {
     int ret = 0;
@@ -186,6 +274,40 @@ static int kvm_riscv_get_regs_fp(CPUState *cs)
     return ret;
 }
 
+static int kvm_riscv_put_regs_fp(CPUState *cs)
+{
+    int ret = 0;
+    int i;
+    CPURISCVState *env = &RISCV_CPU(cs)->env;
+
+    if (riscv_has_ext(env, RVD)) {
+        uint64_t reg;
+        for (i = 0; i < 32; i++) {
+            reg = env->fpr[i];
+            ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), &reg);
+            if (ret) {
+                return ret;
+            }
+        }
+        return ret;
+    }
+
+    if (riscv_has_ext(env, RVF)) {
+        uint32_t reg;
+        for (i = 0; i < 32; i++) {
+            reg = env->fpr[i];
+            ret = kvm_set_one_reg(cs, RISCV_FP_F_REG(env, i), &reg);
+            if (ret) {
+                return ret;
+            }
+        }
+        return ret;
+    }
+
+    return ret;
+}
+
+
 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
     KVM_CAP_LAST_INFO
 };
@@ -214,7 +336,24 @@ int kvm_arch_get_registers(CPUState *cs)
 
 int kvm_arch_put_registers(CPUState *cs, int level)
 {
-    return 0;
+    int ret = 0;
+
+    ret = kvm_riscv_put_regs_core(cs);
+    if (ret) {
+        return ret;
+    }
+
+    ret = kvm_riscv_put_regs_csr(cs);
+    if (ret) {
+        return ret;
+    }
+
+    ret = kvm_riscv_put_regs_fp(cs);
+    if (ret) {
+        return ret;
+    }
+
+    return ret;
 }
 
 int kvm_arch_release_virq_post(int virq)
-- 
2.19.1
Re: [PATCH v1 05/12] target/riscv: Implement kvm_arch_put_registers
Posted by Anup Patel 4 years, 2 months ago 
On Sat, Nov 20, 2021 at 1:17 PM Yifei Jiang <jiangyifei@huawei.com> wrote:
>
> Put GPR CSR and FP registers to kvm by KVM_SET_ONE_REG ioctl
>
> Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
> Signed-off-by: Mingwang Li <limingwang@huawei.com>
> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  target/riscv/kvm.c | 141 ++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 140 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
> index b49c24be0a..5fe5ca4434 100644
> --- a/target/riscv/kvm.c
> +++ b/target/riscv/kvm.c
> @@ -90,6 +90,31 @@ static int kvm_riscv_get_regs_core(CPUState *cs)
>      return ret;
>  }
>
> +static int kvm_riscv_put_regs_core(CPUState *cs)
> +{
> +    int ret = 0;
> +    int i;
> +    target_ulong reg;
> +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> +
> +    reg = env->pc;
> +    ret = kvm_set_one_reg(cs, RISCV_CORE_REG(env, regs.pc), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    for (i = 1; i < 32; i++) {
> +        uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i);
> +        reg = env->gpr[i];
> +        ret = kvm_set_one_reg(cs, id, &reg);
> +        if (ret) {
> +            return ret;
> +        }
> +    }
> +
> +    return ret;
> +}
> +
>  static int kvm_riscv_get_regs_csr(CPUState *cs)
>  {
>      int ret = 0;
> @@ -153,6 +178,69 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
>      return ret;
>  }
>
> +static int kvm_riscv_put_regs_csr(CPUState *cs)
> +{
> +    int ret = 0;
> +    target_ulong reg;
> +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> +
> +    reg = env->mstatus;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sstatus), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->mie;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sie), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->stvec;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stvec), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->sscratch;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sscratch), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->sepc;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sepc), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->scause;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, scause), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->stval;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stval), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->mip;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sip), &reg);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    reg = env->satp;
> +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, satp), &reg);
> +    if (ret) {
> +        return ret;
> +    }

Same as the previous patch, there is a common pattern in above
kvm_set_one_reg() calls. Please use a macro to simplify.

Regards,
Anup

> +
> +    return ret;
> +}
> +
>  static int kvm_riscv_get_regs_fp(CPUState *cs)
>  {
>      int ret = 0;
> @@ -186,6 +274,40 @@ static int kvm_riscv_get_regs_fp(CPUState *cs)
>      return ret;
>  }
>
> +static int kvm_riscv_put_regs_fp(CPUState *cs)
> +{
> +    int ret = 0;
> +    int i;
> +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> +
> +    if (riscv_has_ext(env, RVD)) {
> +        uint64_t reg;
> +        for (i = 0; i < 32; i++) {
> +            reg = env->fpr[i];
> +            ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), &reg);
> +            if (ret) {
> +                return ret;
> +            }
> +        }
> +        return ret;
> +    }
> +
> +    if (riscv_has_ext(env, RVF)) {
> +        uint32_t reg;
> +        for (i = 0; i < 32; i++) {
> +            reg = env->fpr[i];
> +            ret = kvm_set_one_reg(cs, RISCV_FP_F_REG(env, i), &reg);
> +            if (ret) {
> +                return ret;
> +            }
> +        }
> +        return ret;
> +    }
> +
> +    return ret;
> +}
> +
> +
>  const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
>      KVM_CAP_LAST_INFO
>  };
> @@ -214,7 +336,24 @@ int kvm_arch_get_registers(CPUState *cs)
>
>  int kvm_arch_put_registers(CPUState *cs, int level)
>  {
> -    return 0;
> +    int ret = 0;
> +
> +    ret = kvm_riscv_put_regs_core(cs);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    ret = kvm_riscv_put_regs_csr(cs);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    ret = kvm_riscv_put_regs_fp(cs);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    return ret;
>  }
>
>  int kvm_arch_release_virq_post(int virq)
> --
> 2.19.1
>
>
> --
> kvm-riscv mailing list
> kvm-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kvm-riscv
RE: [PATCH v1 05/12] target/riscv: Implement kvm_arch_put_registers
Posted by Jiangyifei 4 years, 2 months ago 
> -----Original Message-----
> From: Anup Patel [mailto:anup@brainfault.org]
> Sent: Friday, December 3, 2021 2:22 PM
> To: Jiangyifei <jiangyifei@huawei.com>
> Cc: QEMU Developers <qemu-devel@nongnu.org>; open list:RISC-V
> <qemu-riscv@nongnu.org>; kvm-riscv@lists.infradead.org; KVM General
> <kvm@vger.kernel.org>; libvir-list@redhat.com; Anup Patel
> <anup.patel@wdc.com>; Palmer Dabbelt <palmer@dabbelt.com>; Alistair
> Francis <Alistair.Francis@wdc.com>; Bin Meng <bin.meng@windriver.com>;
> Fanliang (EulerOS) <fanliang@huawei.com>; Wubin (H)
> <wu.wubin@huawei.com>; Wanghaibin (D) <wanghaibin.wang@huawei.com>;
> wanbo (G) <wanbo13@huawei.com>; limingwang (A)
> <limingwang@huawei.com>
> Subject: Re: [PATCH v1 05/12] target/riscv: Implement kvm_arch_put_registers
> 
> On Sat, Nov 20, 2021 at 1:17 PM Yifei Jiang <jiangyifei@huawei.com> wrote:
> >
> > Put GPR CSR and FP registers to kvm by KVM_SET_ONE_REG ioctl
> >
> > Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
> > Signed-off-by: Mingwang Li <limingwang@huawei.com>
> > Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
> > ---
> >  target/riscv/kvm.c | 141
> > ++++++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 140 insertions(+), 1 deletion(-)
> >
> > diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index
> > b49c24be0a..5fe5ca4434 100644
> > --- a/target/riscv/kvm.c
> > +++ b/target/riscv/kvm.c
> > @@ -90,6 +90,31 @@ static int kvm_riscv_get_regs_core(CPUState *cs)
> >      return ret;
> >  }
> >
> > +static int kvm_riscv_put_regs_core(CPUState *cs) {
> > +    int ret = 0;
> > +    int i;
> > +    target_ulong reg;
> > +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> > +
> > +    reg = env->pc;
> > +    ret = kvm_set_one_reg(cs, RISCV_CORE_REG(env, regs.pc), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    for (i = 1; i < 32; i++) {
> > +        uint64_t id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CORE, i);
> > +        reg = env->gpr[i];
> > +        ret = kvm_set_one_reg(cs, id, &reg);
> > +        if (ret) {
> > +            return ret;
> > +        }
> > +    }
> > +
> > +    return ret;
> > +}
> > +
> >  static int kvm_riscv_get_regs_csr(CPUState *cs)  {
> >      int ret = 0;
> > @@ -153,6 +178,69 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
> >      return ret;
> >  }
> >
> > +static int kvm_riscv_put_regs_csr(CPUState *cs) {
> > +    int ret = 0;
> > +    target_ulong reg;
> > +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> > +
> > +    reg = env->mstatus;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sstatus), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->mie;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sie), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->stvec;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stvec), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->sscratch;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sscratch), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->sepc;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sepc), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->scause;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, scause), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->stval;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, stval), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->mip;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, sip), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    reg = env->satp;
> > +    ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, satp), &reg);
> > +    if (ret) {
> > +        return ret;
> > +    }
> 
> Same as the previous patch, there is a common pattern in above
> kvm_set_one_reg() calls. Please use a macro to simplify.
> 
> Regards,
> Anup
> 

Thanks, it will be modified in the next series.

Yifei

> > +
> > +    return ret;
> > +}
> > +
> >  static int kvm_riscv_get_regs_fp(CPUState *cs)  {
> >      int ret = 0;
> > @@ -186,6 +274,40 @@ static int kvm_riscv_get_regs_fp(CPUState *cs)
> >      return ret;
> >  }
> >
> > +static int kvm_riscv_put_regs_fp(CPUState *cs) {
> > +    int ret = 0;
> > +    int i;
> > +    CPURISCVState *env = &RISCV_CPU(cs)->env;
> > +
> > +    if (riscv_has_ext(env, RVD)) {
> > +        uint64_t reg;
> > +        for (i = 0; i < 32; i++) {
> > +            reg = env->fpr[i];
> > +            ret = kvm_set_one_reg(cs, RISCV_FP_D_REG(env, i), &reg);
> > +            if (ret) {
> > +                return ret;
> > +            }
> > +        }
> > +        return ret;
> > +    }
> > +
> > +    if (riscv_has_ext(env, RVF)) {
> > +        uint32_t reg;
> > +        for (i = 0; i < 32; i++) {
> > +            reg = env->fpr[i];
> > +            ret = kvm_set_one_reg(cs, RISCV_FP_F_REG(env, i), &reg);
> > +            if (ret) {
> > +                return ret;
> > +            }
> > +        }
> > +        return ret;
> > +    }
> > +
> > +    return ret;
> > +}
> > +
> > +
> >  const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
> >      KVM_CAP_LAST_INFO
> >  };
> > @@ -214,7 +336,24 @@ int kvm_arch_get_registers(CPUState *cs)
> >
> >  int kvm_arch_put_registers(CPUState *cs, int level)  {
> > -    return 0;
> > +    int ret = 0;
> > +
> > +    ret = kvm_riscv_put_regs_core(cs);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    ret = kvm_riscv_put_regs_csr(cs);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    ret = kvm_riscv_put_regs_fp(cs);
> > +    if (ret) {
> > +        return ret;
> > +    }
> > +
> > +    return ret;
> >  }
> >
> >  int kvm_arch_release_virq_post(int virq)
> > --
> > 2.19.1
> >
> >
> > --
> > kvm-riscv mailing list
> > kvm-riscv@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/kvm-riscv

Patchew 2.1-devel-b67e4c2

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