From b7abc5c53e3c65b8e931bd96db2d08ba670e111a Mon Sep 17 00:00:00 2001 From: "Sachin P. Sant" Date: Thu, 14 Jun 2007 15:31:34 +1000 Subject: [POWERPC] Fix Kexec/Kdump for power6 On Power machines supporting VRMA, Kexec/Kdump does not work. VRMA (virtual real-mode area) means that accesses with IR/DR = 0 (i.e. the MMU "off") actually still go through the hash table, using entries put there by the hypervisor. This means that when we clear out the hash table on kexec, we need to make sure these entries are left untouched. This also adds plpar_pte_read_raw() on the lines of plpar_pte_remove_raw(). Signed-off-by : Sachin Sant Signed-off-by : Mohan Kumar M Acked-by: Benjamin Herrenschmidt Acked-by: Olof Johansson Signed-off-by: Paul Mackerras --- include/asm-powerpc/mmu-hash64.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/asm-powerpc') diff --git a/include/asm-powerpc/mmu-hash64.h b/include/asm-powerpc/mmu-hash64.h index ba32019c51d..695962f0205 100644 --- a/include/asm-powerpc/mmu-hash64.h +++ b/include/asm-powerpc/mmu-hash64.h @@ -94,6 +94,9 @@ extern char initial_stab[]; #define HPTE_R_C ASM_CONST(0x0000000000000080) #define HPTE_R_R ASM_CONST(0x0000000000000100) +#define HPTE_V_1TB_SEG ASM_CONST(0x4000000000000000) +#define HPTE_V_VRMA_MASK ASM_CONST(0x4001ffffff000000) + /* Values for PP (assumes Ks=0, Kp=1) */ /* pp0 will always be 0 for linux */ #define PP_RWXX 0 /* Supervisor read/write, User none */ -- cgit v1.2.3