From: Aurelien Jarno Date: Mon, 31 Jul 2017 22:52:10 +0000 (+0200) Subject: mips/malta: leave space for the bootmap after the initrd X-Git-Tag: v2.10.0-rc2~8^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9652ef24bfaf59ba179787503fdf7eae6e95475b;p=thirdparty%2Fqemu.git mips/malta: leave space for the bootmap after the initrd Since commit 9768e2abf7 the initrd is loaded at the end of the low memory to avoid clash for the kernel relocation when kaslr is used. However this in turn conflicts with the bootmap memory that the kernel tries to place after initrd, but in low memory. The bootmap spans the whole usable physical address space. The machine can have at most 2GiB of memory, 256MiB of low memory mapped at 0x00000000, and 1792MiB of high memory mapped at 0x90000000. The biggest bootmap therefore corresponds to the adresses 0x00000000 -> 0xffffffff, which at 1 bit per 4kiB page corresponds to 128kiB in memory. Therefore reserve 128kiB after the initrd. Signed-off-by: Aurelien Jarno Tested-by: Yongbok Kim Signed-off-by: Yongbok Kim --- diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c index 8ecd544baa8..9dcec27304d 100644 --- a/hw/mips/mips_malta.c +++ b/hw/mips/mips_malta.c @@ -843,7 +843,10 @@ static int64_t load_kernel (void) if (loaderparams.initrd_filename) { initrd_size = get_image_size (loaderparams.initrd_filename); if (initrd_size > 0) { - initrd_offset = (loaderparams.ram_low_size - initrd_size + /* The kernel allocates the bootmap memory in the low memory after + the initrd. It takes at most 128kiB for 2GB RAM and 4kiB + pages. */ + initrd_offset = (loaderparams.ram_low_size - initrd_size - 131072 - ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK; if (kernel_high >= initrd_offset) { fprintf(stderr,