kernel.git/arch/s390/kernel/head64.S, branch linux-3.1.y

[S390] initial cr0 bits

2011-07-24T08:48:22Z

Remove outdated bits from the initial cr0 register. Signed-off-by: Martin Schwidefsky

[S390] iucv cr0 enablement bit

2011-07-24T08:48:22Z

Do not set the cr0 enablement bit for iucv by default in head[31|64].S, move the enablement to iucv_init in the iucv base layer. Signed-off-by: Martin Schwidefsky

[S390] fix s390 assembler code alignments

2011-07-24T08:48:21Z

The alignment is missing for various global symbols in s390 assembly code. With a recent gcc and an instruction like stgrl this can lead to a specification exception if the instruction uses such a mis-aligned address. Specify the alignment explicitely and while add it define __ALIGN for s390 and use the ENTRY define to save some lines of code. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky

[S390] correct address of _stext with CONFIG_SHARED_KERNEL=y

2010-05-12T07:32:26Z

As of git commit 1844c9bc0b2fed3023551c1affe033ab38e90b9a head64.S/head31.S are not included in head.S anymore but build as an extra object. This breaks shared kernel support because the .org statement in head64.S/head31.S for CONFIG_SHARED_KERNEL=y will have a different effect. The end address of the head.text section in head.o will be added to the .org value, to compensate for this subtract 0x11000 to get the required value of 0x100000 again. Signed-off-by: Martin Schwidefsky

[S390] fix boot failures with compressed kernels

2010-03-24T10:49:54Z

Fix two bugs with the kernel image compression: 1) reset the bss section of the compressed vmlinux 2) clear the high half of the registers for 64 bit early enough for the decompression step Signed-off-by: Martin Schwidefsky

[S390] add support for compressed kernels

2010-02-26T21:37:33Z

Add the "bzImage" compile target and the necessary code to generate compressed kernel images. The old style uncompressed "image" target is preserved, a simple make will build them both. Signed-off-by: Martin Schwidefsky

[S390] zfcpdump: remove cross arch dump support

2010-02-26T21:37:30Z

Remove support to be able to dump 31 bit systems with a 64 bit dumper. This is mostly useless since no distro ships 31 bit kernels together with a 64 bit dumper. We also get rid of a bit of hacky code. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] s390: clear high-order bits of registers after sam64

2009-12-07T11:45:10Z

When the kernel is IPLed without the CLEAR option and switches to 64-bit, the high-order half of the registers might contain random values. This can cause addressing exceptions and the kernel enters an interrupt loop. Initialize the high-order half of the general purpose registers with zeros after switching to 64-bit mode. Cc: Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

[S390] Limit cpu detection to 256 physical cpus.

2009-09-11T08:29:55Z

Saves us more than 65k pointless IPIs. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] Initialize __LC_THREAD_INFO early.

2009-09-11T08:29:53Z

"lockdep: Fix backtraces" reveales a bug in early setup code: when lockdep tries to save a stack backtrace before setup_arch has been called the lowcore pointer for the current thread info pointer isn't initialized yet. However our save stack backtrace code relies on it. If the pointer isn't initialized the saved backtrace will have zero entries. lockdep however relies (correctly) on the fact that that cannot happen. A write access to some random memory region is the result. Fix this by initializing the thread info pointer early. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky