[PATCH] target/riscv: Fix update of hstatus.GVA in riscv_cpu_do_interrupt

[PATCH] target/riscv: Fix update of hstatus.GVA in riscv_cpu_do_interrupt

[Georg Kotheimer]

The hstatus.GVA bit was not set if the faulting guest virtual address
was zero.

Signed-off-by: Georg Kotheimer <georg.kotheimer@kernkonzept.com>
---
 target/riscv/cpu_helper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 904899054d..c5852ce1b7 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -852,6 +852,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
     bool async = !!(cs->exception_index & RISCV_EXCP_INT_FLAG);
     target_ulong cause = cs->exception_index & RISCV_EXCP_INT_MASK;
     target_ulong deleg = async ? env->mideleg : env->medeleg;
+    bool write_tval = false;
     target_ulong tval = 0;
     target_ulong htval = 0;
     target_ulong mtval2 = 0;
@@ -873,6 +874,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
         case RISCV_EXCP_INST_PAGE_FAULT:
         case RISCV_EXCP_LOAD_PAGE_FAULT:
         case RISCV_EXCP_STORE_PAGE_FAULT:
+            write_tval  = true;
             tval = env->badaddr;
             break;
         default:
@@ -904,7 +906,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
             target_ulong hdeleg = async ? env->hideleg : env->hedeleg;
 
             if ((riscv_cpu_virt_enabled(env) ||
-                 riscv_cpu_two_stage_lookup(env)) && tval) {
+                 riscv_cpu_two_stage_lookup(env)) && write_tval) {
                 /*
                  * If we are writing a guest virtual address to stval, set
                  * this to 1. If we are trapping to VS we will set this to 0
-- 
2.25.1

Re: [PATCH] target/riscv: Fix update of hstatus.GVA in riscv_cpu_do_interrupt

[Alistair Francis]

On Tue, Oct 13, 2020 at 10:31 AM Georg Kotheimer
<georg.kotheimer@kernkonzept.com> wrote:
>
> The hstatus.GVA bit was not set if the faulting guest virtual address
> was zero.
>
> Signed-off-by: Georg Kotheimer <georg.kotheimer@kernkonzept.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Thanks!

Applied to riscv-to-apply.next

Alistair

> ---
>  target/riscv/cpu_helper.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
> index 904899054d..c5852ce1b7 100644
> --- a/target/riscv/cpu_helper.c
> +++ b/target/riscv/cpu_helper.c
> @@ -852,6 +852,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
>      bool async = !!(cs->exception_index & RISCV_EXCP_INT_FLAG);
>      target_ulong cause = cs->exception_index & RISCV_EXCP_INT_MASK;
>      target_ulong deleg = async ? env->mideleg : env->medeleg;
> +    bool write_tval = false;
>      target_ulong tval = 0;
>      target_ulong htval = 0;
>      target_ulong mtval2 = 0;
> @@ -873,6 +874,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
>          case RISCV_EXCP_INST_PAGE_FAULT:
>          case RISCV_EXCP_LOAD_PAGE_FAULT:
>          case RISCV_EXCP_STORE_PAGE_FAULT:
> +            write_tval  = true;
>              tval = env->badaddr;
>              break;
>          default:
> @@ -904,7 +906,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
>              target_ulong hdeleg = async ? env->hideleg : env->hedeleg;
>
>              if ((riscv_cpu_virt_enabled(env) ||
> -                 riscv_cpu_two_stage_lookup(env)) && tval) {
> +                 riscv_cpu_two_stage_lookup(env)) && write_tval) {
>                  /*
>                   * If we are writing a guest virtual address to stval, set
>                   * this to 1. If we are trapping to VS we will set this to 0
> --
> 2.25.1
>
>