x86, 64bit, realmode: Use init_level4_pgt to set trampoline_pgd directly
authorYinghai Lu <yinghai@kernel.org>
Thu, 24 Jan 2013 20:19:50 +0000 (12:19 -0800)
committerH. Peter Anvin <hpa@linux.intel.com>
Tue, 29 Jan 2013 23:12:30 +0000 (15:12 -0800)
with #PF handler way to set early page table, level3_ident will go away with
64bit native path.

So just use entries in init_level4_pgt to set them in trampoline_pgd.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-10-git-send-email-yinghai@kernel.org
Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Acked-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
arch/x86/realmode/init.c

index c44ea7c..ffee06a 100644 (file)
@@ -78,8 +78,8 @@ void __init setup_real_mode(void)
        *trampoline_cr4_features = read_cr4();
 
        trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd);
-       trampoline_pgd[0] = __pa(level3_ident_pgt) + _KERNPG_TABLE;
-       trampoline_pgd[511] = __pa(level3_kernel_pgt) + _KERNPG_TABLE;
+       trampoline_pgd[0] = init_level4_pgt[pgd_index(__PAGE_OFFSET)].pgd;
+       trampoline_pgd[511] = init_level4_pgt[511].pgd;
 #endif
 }