[PATCH v19 1/7] firmware: arm_rmm: Add SMC definitions for calling the RMM

[Suzuki K Poulose]

On 24/09/2026 17:57, Jonathan Cameron wrote:
> On Thu, 24 Sep 2026 14:51:55 +0100
> Suzuki K Poulose <suzuki.poulose at arm.com> wrote:
> 
>> From: Steven Price <steven.price at arm.com>
>>
>> The RMM (Realm Management Monitor) provides functionality that can be
>> accessed by SMC calls from the host.
>>
>> The SMC definitions are based on DEN0137[1] version 2.0-bet3
>>
>> [1] https://developer.arm.com/documentation/den0137/2-0bet3/
>>
>> Reviewed-by: Gavin Shan <gshan at redhat.com>
>> Signed-off-by: Steven Price <steven.price at arm.com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose at arm.com>
> 
> Hi Suzuki,
> 
> One small thing I didn't really care about but where I thought you
> said you were going to tweak things.
> 
> Either way
> Reviewed-by: Jonathan Cameron <jonathan.cameron at oss.qualcomm.com>

Thanks !

> 
>> +struct rec_exit {
>> +	union { /* 0x000 */
>> +		u8 exit_reason;
>> +		u8 padding0[0x100];
>> +	};
>> +	union { /* 0x100 */
>> +		struct {
>> +			u64 esr;
>> +			u64 far;
>> +			u64 hpfar;
>> +			u64 rtt_tree;
>> +		};
>> +		u8 padding1[0x100];
>> +	};
>> +	union { /* 0x200 */
>> +		u64 gprs[REC_RUN_GPRS];
>> +		u8 padding2[0x100];
>> +	};
>> +	union { /* 0x300 */
>> +		u8 padding3[0x100];
> 
> I thought plan was to fold into the padding above?
> 
> https://lore.kernel.org/all/d7ccaf22-5bde-4344-8bf0-a5a17dcac0f3@arm.com/

Yep, I missed it :facepalm:,  Apologies. I will fix it straight awy.

Cheers
Suzuki

> 
>> +	};
>> +	union { /* 0x400 */
>> +		struct {
>> +			u64 cntp_ctl;
>> +			u64 cntp_cval;
>> +			u64 cntv_ctl;
>> +			u64 cntv_cval;
>> +		};
>> +		u8 padding4[0x100];
>> +	};
> 
>