Zou Nan hai (on 13 Sep 2006 12:55:25 +0800) wrote: >MCA dispatch code take physical address of GP passed from SAL, >then call DATA_PA_TO_VA twice on GP before call into C code. >The first time is in ia64_set_kernel_register, the second time is in >VIRTUAL_MODE_ENTER. >The gp is changed to a virtual address in region 7 because DATA_PA_TO_VA >is implemented >by dep instruction. > >However when notify blocks were called from MCA handler code, >because notify blocks are supported by callback function pointers, >gp value value was switched to region 5 again. > > >The patch set gp register to kernel gp of region 5 at entry of MCA >dispatch. > >Signed-off-by: Zou Nan hai <nanhai.zou@xxxxxxxxx> The idea is right, but there is no need to pass __gp to VIRTUAL_MODE_ENTER. There will never be a case of VIRTUAL_MODE_ENTER followed by entry to a module, so just hard code 'movl r1 = __gp' into VIRTUAL_MODE_ENTER and drop it from the parameter list. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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