Re: [PATCH] armv8: cache_v8: Fix pgtables setup when MMU is already enabled

On Wed, 14 Sep 2022 13:37:46 +0200 Pali Rohár pali@kernel.org wrote:

When MMU is already enabled then dcache_enable() does not call mmu_setup() and so setup_all_pgtables() is also never called.

In this situation when some driver calls mmu_set_region_dcache_behaviour() function then U-Boot crashes with error message:

Emergency page table not setup.

Fix this issue by explicitly calling setup_all_pgtables() in dcache_enable() function near condition for mmu_setup().

This change fixes chainloading U-Boot from U-Boot on Turris Mox board which uses mvneta ethernet driver which calls mmu_set_region_dcache_behaviour().

Signed-off-by: Pali Rohár pali@kernel.org

Reviewed-by: Marek Behún kabel@kernel.org