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Subject[PATCH v3 10/20] ARM: LPAE: Change setup_mm_for_reboot() to work with LPAE
Date
This function was assuming that there are only two levels of page
tables. The patch changes looping over the PMD entries to make it
compatible with LPAE.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm/mm/mmu.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 0ce781f..e238340 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1098,13 +1098,16 @@ void setup_mm_for_reboot(char mode)
if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
base_pmdval |= PMD_BIT4;

- for (i = 0; i < FIRST_USER_PGD_NR + USER_PTRS_PER_PGD; i++, pgd++) {
+ for (i = 0; i < TASK_SIZE >> PMD_SHIFT; i++) {
unsigned long pmdval = (i << PMD_SHIFT) | base_pmdval;
pmd_t *pmd;
+ unsigned long addr = i << PMD_SHIFT;

- pmd = pmd_off(pgd, i << PMD_SHIFT);
+ pmd = pmd_off(pgd + pgd_index(addr), addr);
pmd[0] = __pmd(pmdval);
+#ifndef CONFIG_ARM_LPAE
pmd[1] = __pmd(pmdval + (1 << (PMD_SHIFT - 1)));
+#endif
flush_pmd_entry(pmd);
}


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