From: Frederik Haxel haxel@fzi.de
[ Upstream commit 66f1e68093979816a23412a3fad066f5bcbc0360 ]
Currently, the XIP kernel seems to fail to boot due to missing XIP_FIXUP and a wrong page_offset value. A superfluous XIP_FIXUP has also been removed.
Signed-off-by: Frederik Haxel haxel@fzi.de Link: https://lore.kernel.org/r/20231212130116.848530-2-haxel@fzi.de Signed-off-by: Palmer Dabbelt palmer@rivosinc.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/riscv/kernel/head.S | 1 + arch/riscv/mm/init.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 76ace1e0b46f..663881785b2b 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -89,6 +89,7 @@ relocate_enable_mmu: /* Compute satp for kernel page tables, but don't load it yet */ srl a2, a0, PAGE_SHIFT la a1, satp_mode + XIP_FIXUP_OFFSET a1 REG_L a1, 0(a1) or a2, a2, a1
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 2e011cbddf3a..a65937336cdc 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -174,6 +174,9 @@ void __init mem_init(void)
/* Limit the memory size via mem. */ static phys_addr_t memory_limit; +#ifdef CONFIG_XIP_KERNEL +#define memory_limit (*(phys_addr_t *)XIP_FIXUP(&memory_limit)) +#endif /* CONFIG_XIP_KERNEL */
static int __init early_mem(char *p) { @@ -952,7 +955,7 @@ static void __init create_fdt_early_page_table(uintptr_t fix_fdt_va, * setup_vm_final installs the linear mapping. For 32-bit kernel, as the * kernel is mapped in the linear mapping, that makes no difference. */ - dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa)); + dtb_early_va = kernel_mapping_pa_to_va(dtb_pa); #endif
dtb_early_pa = dtb_pa; @@ -1055,9 +1058,9 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) #endif
kernel_map.virt_addr = KERNEL_LINK_ADDR + kernel_map.virt_offset; - kernel_map.page_offset = _AC(CONFIG_PAGE_OFFSET, UL);
#ifdef CONFIG_XIP_KERNEL + kernel_map.page_offset = PAGE_OFFSET_L3; kernel_map.xiprom = (uintptr_t)CONFIG_XIP_PHYS_ADDR; kernel_map.xiprom_sz = (uintptr_t)(&_exiprom) - (uintptr_t)(&_xiprom);
@@ -1067,6 +1070,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
kernel_map.va_kernel_xip_pa_offset = kernel_map.virt_addr - kernel_map.xiprom; #else + kernel_map.page_offset = _AC(CONFIG_PAGE_OFFSET, UL); kernel_map.phys_addr = (uintptr_t)(&_start); kernel_map.size = (uintptr_t)(&_end) - kernel_map.phys_addr; #endif