riscv: Add sfence.vma after early page table changes

This invalidates local TLB after modifying the page tables during early init as it's too early to handle suprious faults as we otherwise do. Fixes: f2c17aa ("RISC-V: Implement compile-time fixed mappings") Reported-by: Syven Wang <[email protected]> Signed-off-by: Syven Wang <[email protected]> Signed-off-by: Greentime Hu <[email protected]> Reviewed-by: Anup Patel <[email protected]> [Palmer: Cleaned up the commit text] Signed-off-by: Palmer Dabbelt <[email protected]>
ywc689 · Sep 19, 2020 · 21190b7 · 21190b7
1 parent 66d18db
commit 21190b7
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
@@ -226,12 +226,11 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot)
 
 	ptep = &fixmap_pte[pte_index(addr)];
 
-	if (pgprot_val(prot)) {
+	if (pgprot_val(prot))
 		set_pte(ptep, pfn_pte(phys >> PAGE_SHIFT, prot));
-	} else {
+	else
 		pte_clear(&init_mm, addr, ptep);
-		local_flush_tlb_page(addr);
-	}
+	local_flush_tlb_page(addr);
 }
 
 static pte_t *__init get_pte_virt(phys_addr_t pa)