Commit-ID: 7cc03e48965453b5df1cce5062c826189b04b960 Gitweb: http://git.kernel.org/tip/7cc03e48965453b5df1cce5062c826189b04b960 Author: Dmitry Skorodumov <sdmitry@xxxxxxxxxxxxx> AuthorDate: Tue, 28 Jul 2015 18:38:32 +0400 Committer: Matt Fleming <matt.fleming@xxxxxxxxx> CommitDate: Thu, 30 Jul 2015 18:07:10 +0100 x86/efi: Use all 64 bit of efi_memmap in setup_e820() The efi_info structure stores low 32 bits of memory map in efi_memmap and high 32 bits in efi_memmap_hi. While constructing pointer in the setup_e820(), need to take into account all 64 bit of the pointer. It is because on 64bit machine the function efi_get_memory_map() may return full 64bit pointer and before the patch that pointer was truncated. The issue is triggered on Parallles virtual machine and fixed with this patch. Signed-off-by: Dmitry Skorodumov <sdmitry@xxxxxxxxxxxxx> Cc: Denis V. Lunev <den@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx> --- arch/x86/boot/compressed/eboot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index 2c82bd1..7d69afd 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -1193,6 +1193,10 @@ static efi_status_t setup_e820(struct boot_params *params, unsigned int e820_type = 0; unsigned long m = efi->efi_memmap; +#ifdef CONFIG_X86_64 + m |= (u64)efi->efi_memmap_hi << 32; +#endif + d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size)); switch (d->type) { case EFI_RESERVED_TYPE: -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html