Re: [PATCH v2 1/3] target/arm: Restrict v8M IDAU to TCG

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 3/9/21 2:41 PM, Claudio Fontana wrote:
> On 2/21/21 11:26 PM, Philippe Mathieu-Daudé wrote:
>> IDAU is specific to M-profile. KVM only supports A-profile.
>> Restrict this interface to TCG, as it is pointless (and
>> confusing) on a KVM-only build.
>>
>> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
>> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
>> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> 
> 
> This one breaks the KVM tests hard though (most of them).
> 
> I will try to figure out why.
> 
> Ciao,
> 
> Claudio
> 
> 
>> ---
>>  target/arm/cpu.c     | 7 -------
>>  target/arm/cpu_tcg.c | 8 ++++++++
>>  2 files changed, 8 insertions(+), 7 deletions(-)
>>
>> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
>> index b8bc89e71fc..a772fd4926f 100644
>> --- a/target/arm/cpu.c
>> +++ b/target/arm/cpu.c
>> @@ -2380,12 +2380,6 @@ static const TypeInfo arm_cpu_type_info = {
>>      .class_init = arm_cpu_class_init,
>>  };
>>  
>> -static const TypeInfo idau_interface_type_info = {
>> -    .name = TYPE_IDAU_INTERFACE,
>> -    .parent = TYPE_INTERFACE,

Hmm this is an interface...

Is a CPU/machine trying to resolve it?

>> -    .class_size = sizeof(IDAUInterfaceClass),
>> -};
>> -
>>  static void arm_cpu_register_types(void)
>>  {
>>      const size_t cpu_count = ARRAY_SIZE(arm_cpus);
>> @@ -2399,7 +2393,6 @@ static void arm_cpu_register_types(void)
>>      if (cpu_count) {
>>          size_t i;
>>  
>> -        type_register_static(&idau_interface_type_info);
>>          for (i = 0; i < cpu_count; ++i) {
>>              arm_cpu_register(&arm_cpus[i]);
>>          }
>> diff --git a/target/arm/cpu_tcg.c b/target/arm/cpu_tcg.c
>> index c29b434c60d..fb07a336939 100644
>> --- a/target/arm/cpu_tcg.c
>> +++ b/target/arm/cpu_tcg.c
>> @@ -14,6 +14,7 @@
>>  #include "hw/core/tcg-cpu-ops.h"
>>  #endif /* CONFIG_TCG */
>>  #include "internals.h"
>> +#include "target/arm/idau.h"
>>  
>>  /* CPU models. These are not needed for the AArch64 linux-user build. */
>>  #if !defined(CONFIG_USER_ONLY) || !defined(TARGET_AARCH64)
>> @@ -739,10 +740,17 @@ static const ARMCPUInfo arm_tcg_cpus[] = {
>>      { .name = "pxa270-c5",   .initfn = pxa270c5_initfn },
>>  };
>>  
>> +static const TypeInfo idau_interface_type_info = {
>> +    .name = TYPE_IDAU_INTERFACE,
>> +    .parent = TYPE_INTERFACE,
>> +    .class_size = sizeof(IDAUInterfaceClass),
>> +};
>> +
>>  static void arm_tcg_cpu_register_types(void)
>>  {
>>      size_t i;
>>  
>> +    type_register_static(&idau_interface_type_info);
>>      for (i = 0; i < ARRAY_SIZE(arm_tcg_cpus); ++i) {
>>          arm_cpu_register(&arm_tcg_cpus[i]);
>>      }
>>
> 
>