Add MMIO Hack Support

UEFI-code · UEFI-code · commit d9016e1f561f · 2025-09-08T21:21:14.000+09:00
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
@@ -598,6 +598,12 @@ static void __init map_mem(pgd_t *pgdp)
 		pr_alert("!!! %s %s %d, Mapping Phy-Addr 0x%llx - 0x%llx as RWX !!!\n", __FILE__, __func__, __LINE__, start, end);
 		__map_memblock(pgdp, start, end, __pgprot(PROT_NORMAL | PTE_USER), flags);
 	}
+
+	if (PHYS_OFFSET)
+	{
+		pr_alert("!!! %s %s %d, Mapping MMIO 0 - 0x%llx as RWX !!!\n", __FILE__, __func__, __LINE__, PHYS_OFFSET);
+		__map_memblock(pgdp, 0, PHYS_OFFSET, __pgprot(PROT_NORMAL | PTE_USER), flags);
+	}
 	
 	arm64_kfence_map_pool(early_kfence_pool, pgdp);
 }

Original file line number	Diff line number	Diff line change
`@@ -598,6 +598,12 @@ static void __init map_mem(pgd_t *pgdp)`
`598`	`598`	`pr_alert("!!! %s %s %d, Mapping Phy-Addr 0x%llx - 0x%llx as RWX !!!\n", __FILE__, __func__, __LINE__, start, end);`
`599`	`599`	`__map_memblock(pgdp, start, end, __pgprot(PROT_NORMAL \| PTE_USER), flags);`
`600`	`600`	`}`
	`601`	`+`
	`602`	`+ if (PHYS_OFFSET)`
	`603`	`+ {`
	`604`	`+ pr_alert("!!! %s %s %d, Mapping MMIO 0 - 0x%llx as RWX !!!\n", __FILE__, __func__, __LINE__, PHYS_OFFSET);`
	`605`	`+ __map_memblock(pgdp, 0, PHYS_OFFSET, __pgprot(PROT_NORMAL \| PTE_USER), flags);`
	`606`	`+ }`
`601`	`607`
`602`	`608`	`arm64_kfence_map_pool(early_kfence_pool, pgdp);`
`603`	`609`	`}`