On 18.03.2025 14:05, Oleksii Kurochko wrote:
>
> On 3/17/25 9:07 PM, Luca Fancellu wrote:
>> From: Penny Zheng<penny.zh...@arm.com>
>>
>> ARM MPU system doesn't need to use paging memory pool, as MPU memory
>> mapping table at most takes only one 4KB page, which is enough to
>> manage the maximum 255 MPU memory regions, for all EL2 stage 1
>> translation and EL1 stage 2 translation.
>>
>> Introduce ARCH_PAGING_MEMPOOL Kconfig common symbol, selected for Arm
>> MMU systems, x86 and RISC-V.
>>
>> Wrap the code inside 'construct_domU' that deal with p2m paging
>> allocation in a new function 'domain_p2m_set_allocation', protected
>> by ARCH_PAGING_MEMPOOL, this is done in this way to prevent polluting
>> the former function with #ifdefs and improve readability
>>
>> Introduce arch_{get,set}_paging_mempool_size stubs for architecture
>> with !ARCH_PAGING_MEMPOOL.
>>
>> Remove 'struct paging_domain' from Arm 'struct arch_domain' when the
>> field is not required.
>>
>> Signed-off-by: Penny Zheng<penny.zh...@arm.com>
>> Signed-off-by: Wei Chen<wei.c...@arm.com>
>> Signed-off-by: Luca Fancellu<luca.fance...@arm.com>
>> ---
>> v3 changes:
>> - Introduced ARCH_PAGING_MEMPOOL instead of HAS_PAGING_MEMPOOL
>> v2 changes:
>> - make Kconfig HAS_PAGING_MEMPOOL common
>> - protect also "xen,domain-p2m-mem-mb" reading with HAS_PAGING_MEMPOOL
>> - do not define p2m_teardown{_allocation} in this patch
>> - change commit message
>> ---
>> xen/arch/arm/Kconfig | 1 +
>> xen/arch/arm/dom0less-build.c | 74 ++++++++++++++++++++-----------
>> xen/arch/arm/include/asm/domain.h | 2 +
>> xen/arch/riscv/Kconfig | 1 +
>> xen/arch/x86/Kconfig | 1 +
>> xen/common/Kconfig | 3 ++
>> xen/include/xen/domain.h | 17 +++++++
>> 7 files changed, 73 insertions(+), 26 deletions(-)
>
> For RISC-V:
> Reviewed-by: Oleksii Kurochko<oleksii.kuroc...@gmail.com>
Mind me asking then why RISC-V needs this at this point? The stubs surely
were added to address some build issue, not because they are actively
meaningful?
Jan
