Hi Ayan, > On Aug 7, 2023, at 21:17, Ayan Kumar Halder <[email protected]> wrote: > > Hi Henry, > > On 01/08/2023 04:44, Henry Wang wrote: >> CAUTION: This message has originated from an External Source. Please use >> proper judgment and caution when opening attachments, clicking links, or >> responding to this email. >> >> >> There are two types of memory system architectures available for >> Arm-based systems, namely the Virtual Memory System Architecture (VMSA) >> and the Protected Memory System Architecture (PMSA). According to >> ARM DDI 0487G.a, A VMSA provides a Memory Management Unit (MMU) that >> controls address translation, access permissions, and memory attribute >> determination and checking, for memory accesses made by the PE. And >> refer to ARM DDI 0600A.c, the PMSA supports a unified memory protection >> scheme where an Memory Protection Unit (MPU) manages instruction and >> data access. Currently, Xen only suuports VMSA. >> >> As a preparation of the Xen MPU (PMSA) support. Introduce a Kconfig >> choice under the "Architecture Features" menu for user to choose the >> memory system architecture for the system. Since currently only VMSA >> is supported, only add the bool CONFIG_HAS_MMU to keep consistent with >> the default behavior. User can choose either VMSA or PMSA but not both >> in the future after PMSA/MPU is supported in Xen. >> >> Suggested-by: Julien Grall <[email protected]> >> Signed-off-by: Henry Wang <[email protected]> > > The patch looks good, but it does not cleanly apply > > b4 mbox [email protected] > > git am ./[email protected] > > Applying: xen/arm: Introduce 'choice' for memory system architecture > error: xen/arch/arm/Kconfig: does not match index > Patch failed at 0001 xen/arm: Introduce 'choice' for memory system > architecture
This is weird, so I tried to apply this patch (by clicking the mbox button on the top right of [1]) on top of 65f0d6fc80 x86: Drop opt_pku entirely and below is what I have: $ git am ~/v4-02-13-xen-arm-Introduce-choice-for-memory-system-architecture.patch Applying: xen/arm: Introduce 'choice' for memory system architecture I suspect recently there is some Kconfig changes, so could you please clarify your base commit? Thanks! [1] https://patchwork.kernel.org/project/xen-devel/patch/[email protected]/ Kind regards, Henry > > - Ayan
