On Jun 10, 2008, at 7:50 PM, Benjamin Herrenschmidt wrote:
This is some preliminary work to improve TLB management on SW loaded TLB powerpc platforms. This introduce support for non-atomic PTE operations in pgtable-ppc32.h and removes write back to the PTE from the TLB miss handlers. In addition, the DSI interrupt code no longer tries to fixup write permission, this is left to generic code, and _PAGE_HWWRITE is gone. Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]> --- This is a first step, plan is to do the same for FSL BookE, 405 and possibly 8xx too. From there, I want to rework a bit the execute permission handling to avoid multiple faults, add support for _PAGE_EXEC (no executable mappings), for prefaulting (especially for kmap) and proper SMP support for future SMP capable BookE platforms.
You really should add some comment about what you are doing with the 44x watermark. As I look at this I'm not clear what that change is about and I'm sure in the future someone looking at this will wondering why this commit changed those bits.
Otherwise this all looks good (other than my other nit picking comments) - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
