target/arm: Implement FEAT_ECV (Enhanced Counter Virtualization)

[PATCH 8/8] target/arm: Enable FEAT_ECV for 'max' CPU

Posted by Peter Maydell 8 months, 4 weeks ago

Enable all FEAT_ECV features on the 'max' CPU.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 docs/system/arm/emulation.rst | 1 +
 target/arm/tcg/cpu64.c        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index f67aea2d836..2a7bbb82dc4 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -28,6 +28,7 @@ the following architecture extensions:
 - FEAT_DotProd (Advanced SIMD dot product instructions)
 - FEAT_DoubleFault (Double Fault Extension)
 - FEAT_E0PD (Preventing EL0 access to halves of address maps)
+- FEAT_ECV (Enhanced Counter Virtualization)
 - FEAT_EPAC (Enhanced pointer authentication)
 - FEAT_ETS (Enhanced Translation Synchronization)
 - FEAT_EVT (Enhanced Virtualization Traps)
diff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c
index 5fba2c0f040..9f7a9f3d2cc 100644
--- a/target/arm/tcg/cpu64.c
+++ b/target/arm/tcg/cpu64.c
@@ -1184,6 +1184,7 @@ void aarch64_max_tcg_initfn(Object *obj)
     t = FIELD_DP64(t, ID_AA64MMFR0, TGRAN64_2, 2); /* 64k stage2 supported */
     t = FIELD_DP64(t, ID_AA64MMFR0, TGRAN4_2, 2);  /*  4k stage2 supported */
     t = FIELD_DP64(t, ID_AA64MMFR0, FGT, 1);       /* FEAT_FGT */
+    t = FIELD_DP64(t, ID_AA64MMFR0, ECV, 2);       /* FEAT_ECV */
     cpu->isar.id_aa64mmfr0 = t;
 
     t = cpu->isar.id_aa64mmfr1;
-- 
2.34.1

Re: [PATCH 8/8] target/arm: Enable FEAT_ECV for 'max' CPU

Posted by Richard Henderson 8 months, 4 weeks ago

On 3/1/24 08:32, Peter Maydell wrote:
> Enable all FEAT_ECV features on the 'max' CPU.
> 
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   docs/system/arm/emulation.rst | 1 +
>   target/arm/tcg/cpu64.c        | 1 +
>   2 files changed, 2 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

Re: [PATCH 8/8] target/arm: Enable FEAT_ECV for 'max' CPU

Posted by Philippe Mathieu-Daudé 8 months, 4 weeks ago

On 1/3/24 19:32, Peter Maydell wrote:
> Enable all FEAT_ECV features on the 'max' CPU.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   docs/system/arm/emulation.rst | 1 +
>   target/arm/tcg/cpu64.c        | 1 +
>   2 files changed, 2 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>