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Re: [PATCH v2 3/3] arm/mpu: Provide access to the MPU region from the C code
- To: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Mon, 9 Jun 2025 09:16:15 +0000
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Mon, 09 Jun 2025 09:17:03 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Nodisclaimer: true
- Thread-index: AQHb1wMFgqp5jCI+gEaPA46nKsooErP6hW+AgAAKtIA=
- Thread-topic: [PATCH v2 3/3] arm/mpu: Provide access to the MPU region from the C code
Oh sorry forgot one thing ...
>
>> /*
>> * Armv8-R supports direct access and indirect access to the MPU regions
>> through
>> * registers:
>> @@ -85,6 +87,7 @@ static void __init __maybe_unused build_assertions(void)
>> */
>> static void prepare_selector(uint8_t *sel)
>> {
>> +#ifdef CONFIG_ARM_64
>> uint8_t cur_sel = *sel;
>>
>> /*
>> @@ -98,7 +101,8 @@ static void prepare_selector(uint8_t *sel)
>> WRITE_SYSREG(cur_sel, PRSELR_EL2);
>> isb();
>> }
>> - *sel &= 0xFU;
>> + *sel = *sel & 0xFU;
this line is not part of this commit, maybe rebase clash?
Cheers,
Luca
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