* [PATCH] KVM: PPC: Book3S HV: Add H_VIRT mapping for tracing exits
@ 2025-05-16 12:12 Gautam Menghani
2025-05-17 14:03 ` Ritesh Harjani
0 siblings, 1 reply; 2+ messages in thread
From: Gautam Menghani @ 2025-05-16 12:12 UTC (permalink / raw)
To: maddy, npiggin, mpe, christophe.leroy
Cc: Gautam Menghani, linuxppc-dev, kvm, linux-kernel
The macro kvm_trace_symbol_exit is used for providing the mappings
for the trap vectors and their names. Add mapping for H_VIRT so that
trap reason is displayed as string instead of a vector number when using
the kvm_guest_exit tracepoint.
Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
---
arch/powerpc/kvm/trace_book3s.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kvm/trace_book3s.h b/arch/powerpc/kvm/trace_book3s.h
index 372a82fa2de3..9260ddbd557f 100644
--- a/arch/powerpc/kvm/trace_book3s.h
+++ b/arch/powerpc/kvm/trace_book3s.h
@@ -25,6 +25,7 @@
{0xe00, "H_DATA_STORAGE"}, \
{0xe20, "H_INST_STORAGE"}, \
{0xe40, "H_EMUL_ASSIST"}, \
+ {0xea0, "H_VIRT"}, \
{0xf00, "PERFMON"}, \
{0xf20, "ALTIVEC"}, \
{0xf40, "VSX"}
--
2.49.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] KVM: PPC: Book3S HV: Add H_VIRT mapping for tracing exits
2025-05-16 12:12 [PATCH] KVM: PPC: Book3S HV: Add H_VIRT mapping for tracing exits Gautam Menghani
@ 2025-05-17 14:03 ` Ritesh Harjani
0 siblings, 0 replies; 2+ messages in thread
From: Ritesh Harjani @ 2025-05-17 14:03 UTC (permalink / raw)
To: Gautam Menghani, maddy, npiggin, mpe, christophe.leroy
Cc: Gautam Menghani, linuxppc-dev, kvm, linux-kernel
Gautam Menghani <gautam@linux.ibm.com> writes:
> The macro kvm_trace_symbol_exit is used for providing the mappings
> for the trap vectors and their names. Add mapping for H_VIRT so that
> trap reason is displayed as string instead of a vector number when using
> the kvm_guest_exit tracepoint.
>
trace_kvm_guest_exit(vcpu) gets called on kvm exit and vcpu->arch.trap
carries the trap value whose values are defined in
arch/powerpc/include/asm/kvm_asm.h
i.e.
#define BOOK3S_INTERRUPT_H_VIRT 0xea0
kvm_trace_symbol_exit provides these mappings for book3s HV & PR.
The change looks good to me. Please feel free to add:
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
> Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
> ---
> arch/powerpc/kvm/trace_book3s.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/kvm/trace_book3s.h b/arch/powerpc/kvm/trace_book3s.h
> index 372a82fa2de3..9260ddbd557f 100644
> --- a/arch/powerpc/kvm/trace_book3s.h
> +++ b/arch/powerpc/kvm/trace_book3s.h
> @@ -25,6 +25,7 @@
> {0xe00, "H_DATA_STORAGE"}, \
> {0xe20, "H_INST_STORAGE"}, \
> {0xe40, "H_EMUL_ASSIST"}, \
> + {0xea0, "H_VIRT"}, \
> {0xf00, "PERFMON"}, \
> {0xf20, "ALTIVEC"}, \
> {0xf40, "VSX"}
> --
> 2.49.0
^ permalink raw reply [flat|nested] 2+ messages in thread
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