From: Alistair Francis <alistair23@gmail.com>
To: Rajnesh Kanwal <rkanwal@rivosinc.com>
Cc: qemu-riscv@nongnu.org, qemu-devel@nongnu.org, palmer@dabbelt.com,
alistair.francis@wdc.com, bin.meng@windriver.com,
liweiwei@iscas.ac.cn, dbarboza@ventanamicro.com,
zhiwei_liu@linux.alibaba.com, atishp@rivosinc.com,
apatel@ventanamicro.com
Subject: Re: [PATCH v2 3/6] target/riscv: Set VS* bits to one in mideleg when H-Ext is enabled
Date: Fri, 2 Jun 2023 13:17:31 +1000 [thread overview]
Message-ID: <CAKmqyKNjk0ibnc07poAESG7vsA24VPWWySnmkHX7aixgnwz-WQ@mail.gmail.com> (raw)
In-Reply-To: <20230526162308.22892-4-rkanwal@rivosinc.com>
On Sat, May 27, 2023 at 2:24 AM Rajnesh Kanwal <rkanwal@rivosinc.com> wrote:
>
> With H-Ext supported, VS bits are all hardwired to one in MIDELEG
> denoting always delegated interrupts. This is being done in rmw_mideleg
> but given mideleg is used in other places when routing interrupts
> this change initializes it in riscv_cpu_realize to be on the safe side.
>
> Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Alistair
> ---
> target/riscv/cpu.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index db0875fb43..269a094f42 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -1280,6 +1280,11 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
> riscv_pmu_timer_cb, cpu);
> }
> }
> +
> + /* With H-Ext, VSSIP, VSTIP, VSEIP and SGEIP are hardwired to one. */
> + if (riscv_has_ext(env, RVH)) {
> + env->mideleg = MIP_VSSIP | MIP_VSTIP | MIP_VSEIP | MIP_SGEIP;
> + }
> #endif
>
> riscv_cpu_finalize_features(cpu, &local_err);
> --
> 2.25.1
>
>
next prev parent reply other threads:[~2023-06-02 3:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 16:23 [PATCH v2 0/6] target/riscv: Add RISC-V Virtual IRQs and IRQ filtering support Rajnesh Kanwal
2023-05-26 16:23 ` [PATCH v2 1/6] target/riscv: Without H-mode mask all HS mode inturrupts in mie Rajnesh Kanwal
2023-06-02 3:10 ` Alistair Francis
2023-05-26 16:23 ` [PATCH v2 2/6] target/riscv: Check for async flag in case of RISCV_EXCP_SEMIHOST Rajnesh Kanwal
2023-06-02 3:13 ` Alistair Francis
2023-05-26 16:23 ` [PATCH v2 3/6] target/riscv: Set VS* bits to one in mideleg when H-Ext is enabled Rajnesh Kanwal
2023-06-02 3:17 ` Alistair Francis [this message]
2023-05-26 16:23 ` [PATCH v2 4/6] target/riscv: Split interrupt logic from riscv_cpu_update_mip Rajnesh Kanwal
2023-06-02 3:26 ` Alistair Francis
2023-05-26 16:23 ` [PATCH v2 5/6] target/riscv: Add M-mode virtual interrupt and IRQ filtering support Rajnesh Kanwal
2023-06-30 9:26 ` Daniel Henrique Barboza
2023-05-26 16:23 ` [PATCH v2 6/6] target/riscv: Add HS-mode " Rajnesh Kanwal
2023-06-30 9:33 ` Daniel Henrique Barboza
2023-09-06 14:38 ` [PATCH v2 0/6] target/riscv: Add RISC-V Virtual IRQs " Daniel Henrique Barboza
2023-09-21 6:29 ` Rajnesh Kanwal
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