Paul Walmsley 474efecb65 riscv: modify the Image header to improve compatibility with the ARM64 header ... Part of the intention during the definition of the RISC-V kernel image header was to lay the groundwork for a future merge with the ARM64 image header. One error during my original review was not noticing that the RISC-V header's "magic" field was at a different size and position than the ARM64's "magic" field. If the existing ARM64 Image header parsing code were to attempt to parse an existing RISC-V kernel image header format, it would see a magic number 0. This is undesirable, since it's our intention to align as closely as possible with the ARM64 header format. Another problem was that the original "res3" field was not being initialized correctly to zero. Address these issues by creating a 32-bit "magic2" field in the RISC-V header which matches the ARM64 "magic" field. RISC-V binaries will store "RSC\x05" in this field. The intention is that the use of the existing 64-bit "magic" field in the RISC-V header will be deprecated over time. Increment the minor version number of the file format to indicate this change, and update the documentation accordingly. Fix the assembler directives in head.S to ensure that reserved fields are properly zero-initialized. Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com> Reported-by: Palmer Dabbelt <palmer@sifive.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Cc: Atish Patra <atish.patra@wdc.com> Cc: Karsten Merker <merker@debian.org> Link: https://lore.kernel.org/linux-riscv/194c2f10c9806720623430dbf0cc59a965e50448.camel@wdc.com/T/#u Link: https://lore.kernel.org/linux-riscv/mhng-755b14c4-8f35-4079-a7ff-e421fd1b02bc@palmer-si-x1e/T/#t		2019-09-13 19:03:52 -07:00
..
boot	riscv: dts: fu540-c000: drop "timebase-frequency"	2019-07-31 12:26:10 -07:00
configs	riscv: defconfig: Update the defconfig	2019-08-13 19:26:42 -07:00
include	riscv: modify the Image header to improve compatibility with the ARM64 header	2019-09-13 19:03:52 -07:00
kernel	riscv: modify the Image header to improve compatibility with the ARM64 header	2019-09-13 19:03:52 -07:00
lib	RISC-V: Remove udivdi3	2019-08-08 16:05:38 -07:00
mm	RISC-V updates for v5.3	2019-07-18 12:26:59 -07:00
net	bpf, riscv: Enable zext optimization for more RV64G ALU ops	2019-07-05 23:55:41 +02:00
Kconfig	RISC-V updates for v5.3	2019-07-18 12:26:59 -07:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.socs	riscv: select SiFive platform drivers with SOC_SIFIVE	2019-07-01 13:20:01 -07:00
Makefile	riscv: drop unneeded -Wall addition	2019-07-17 10:25:10 +09:00