From: Jiaxun Yang jiaxun.yang@flygoat.com
stable inclusion from stable-v6.6.7 commit 264927e3538169fe2973a5732f03ea01b0f9f9e8 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8SSQ4
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit c7206e7bd214ebb3ca6fa474a4423662327d9beb upstream.
There are many types of revsered memory passed from firmware that should be reserved in memblock, and UMA memory passed from firmware that should be added to system memory for system to use.
Also for memblock there is no need to align those space into page, which actually cause problems.
Handle them properly to prevent memory corruption on some systems.
Cc: stable@vger.kernel.org Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com Signed-off-by: Thomas Bogendoerfer tsbogend@alpha.franken.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- .../include/asm/mach-loongson64/boot_param.h | 6 ++- arch/mips/loongson64/init.c | 42 ++++++++++++------- 2 files changed, 31 insertions(+), 17 deletions(-)
diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h index 035b1a69e2d0..0f67e7efc509 100644 --- a/arch/mips/include/asm/mach-loongson64/boot_param.h +++ b/arch/mips/include/asm/mach-loongson64/boot_param.h @@ -14,7 +14,11 @@ #define ADAPTER_ROM 8 #define ACPI_TABLE 9 #define SMBIOS_TABLE 10 -#define MAX_MEMORY_TYPE 11 +#define UMA_VIDEO_RAM 11 +#define VUMA_VIDEO_RAM 12 +#define MAX_MEMORY_TYPE 13 + +#define MEM_SIZE_IS_IN_BYTES (1 << 31)
#define LOONGSON3_BOOT_MEM_MAP_MAX 128 struct efi_memory_map_loongson { diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c index d62262f93069..f25caa6aa9d3 100644 --- a/arch/mips/loongson64/init.c +++ b/arch/mips/loongson64/init.c @@ -49,8 +49,7 @@ void virtual_early_config(void) void __init szmem(unsigned int node) { u32 i, mem_type; - static unsigned long num_physpages; - u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size; + phys_addr_t node_id, mem_start, mem_size;
/* Otherwise come from DTB */ if (loongson_sysconf.fw_interface != LOONGSON_LEFI) @@ -64,27 +63,38 @@ void __init szmem(unsigned int node)
mem_type = loongson_memmap->map[i].mem_type; mem_size = loongson_memmap->map[i].mem_size; - mem_start = loongson_memmap->map[i].mem_start; + + /* Memory size comes in MB if MEM_SIZE_IS_IN_BYTES not set */ + if (mem_size & MEM_SIZE_IS_IN_BYTES) + mem_size &= ~MEM_SIZE_IS_IN_BYTES; + else + mem_size = mem_size << 20; + + mem_start = (node_id << 44) | loongson_memmap->map[i].mem_start;
switch (mem_type) { case SYSTEM_RAM_LOW: case SYSTEM_RAM_HIGH: - start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT; - node_psize = (mem_size << 20) >> PAGE_SHIFT; - end_pfn = start_pfn + node_psize; - num_physpages += node_psize; - pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", - (u32)node_id, mem_type, mem_start, mem_size); - pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", - start_pfn, end_pfn, num_physpages); - memblock_add_node(PFN_PHYS(start_pfn), - PFN_PHYS(node_psize), node, + case UMA_VIDEO_RAM: + pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes usable\n", + (u32)node_id, mem_type, &mem_start, &mem_size); + memblock_add_node(mem_start, mem_size, node, MEMBLOCK_NONE); break; case SYSTEM_RAM_RESERVED: - pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", - (u32)node_id, mem_type, mem_start, mem_size); - memblock_reserve(((node_id << 44) + mem_start), mem_size << 20); + case VIDEO_ROM: + case ADAPTER_ROM: + case ACPI_TABLE: + case SMBIOS_TABLE: + pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes reserved\n", + (u32)node_id, mem_type, &mem_start, &mem_size); + memblock_reserve(mem_start, mem_size); + break; + /* We should not reserve VUMA_VIDEO_RAM as it overlaps with MMIO */ + case VUMA_VIDEO_RAM: + default: + pr_info("Node %d, mem_type:%d\t[%pa], %pa bytes unhandled\n", + (u32)node_id, mem_type, &mem_start, &mem_size); break; } }