From d2ef264680e7c8e47094b3fe07df9b1f27e19b0d Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Fri, 22 Oct 2021 15:06:46 +0800 Subject: [PATCH] arm64: Use correct method to calculate nomap region boundaries Nomap regions are treated as "reserved". When region boundaries are not page aligned, we usually increase the "reserved" regions rather than decrease them. So, we should use memblock_region_reserved_base_pfn()/ memblock_region_reserved_end_pfn() instead of memblock_region_memory_ base_pfn()/memblock_region_memory_base_pfn() to calculate boundaries. Signed-off-by: Huacai Chen Link: https://lore.kernel.org/r/20211022070646.41923-1-chenhuacai@loongson.cn Signed-off-by: Catalin Marinas --- arch/arm64/kernel/setup.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index a80430550a737..f70573928f1bf 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -237,12 +237,14 @@ static void __init request_standard_resources(void) if (memblock_is_nomap(region)) { res->name = "reserved"; res->flags = IORESOURCE_MEM; + res->start = __pfn_to_phys(memblock_region_reserved_base_pfn(region)); + res->end = __pfn_to_phys(memblock_region_reserved_end_pfn(region)) - 1; } else { res->name = "System RAM"; res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; + res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); + res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; } - res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); - res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; request_resource(&iomem_resource, res); -- 2.39.5