| Message ID | 20220217190247.1003163-1-frank.heimes@canonical.com |
|---|---|
| Headers | show |
| Series | Long kernel command line on s390x (LP: 1960580) | expand |
On 17/02/2022 20:02, frank.heimes@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/1960580 > > Allow to handle command lines with a length of up to 4096 bytes by kernel. > It happened in the past that our supported command line size of 896 bytes > was sometimes too short - while x86, powerpc, and arm each support 2048 bytes. > > This requires: > - an ABI interface to the kernel image, so that tools can figure out if the > kernel supports large command lines (might be a feature bitmap at a fixed > location) > - zipl, genprotimg, qemu, kexec-tools and changes (depending on the kernel > side implementation) > - in-kernel ipl support changes (IPL from reader) > > v2: converted 277c8389386e ("390/kexec_file: move kernel image size check") > into a backport, due to required context adjustments > Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Best regards, Krzysztof
Acked-by: Tim Gardner <tim.gardner@canonical.com> On 2/17/22 12:02 PM, frank.heimes@canonical.com wrote: > BugLink: https://bugs.launchpad.net/bugs/1960580 > > Allow to handle command lines with a length of up to 4096 bytes by kernel. > It happened in the past that our supported command line size of 896 bytes > was sometimes too short - while x86, powerpc, and arm each support 2048 bytes. > > This requires: > - an ABI interface to the kernel image, so that tools can figure out if the > kernel supports large command lines (might be a feature bitmap at a fixed > location) > - zipl, genprotimg, qemu, kexec-tools and changes (depending on the kernel > side implementation) > - in-kernel ipl support changes (IPL from reader) > > v2: converted 277c8389386e ("390/kexec_file: move kernel image size check") > into a backport, due to required context adjustments > > Sven Schnelle (2): > s390/kexec_file: move kernel image size check > s390: support command lines longer than 896 bytes > > arch/s390/boot/head.S | 37 +++++++++------------------ > arch/s390/boot/ipl_parm.c | 4 +-- > arch/s390/include/asm/setup.h | 8 +++--- > arch/s390/include/uapi/asm/setup.h | 2 -- > arch/s390/kernel/asm-offsets.c | 1 + > arch/s390/kernel/early.c | 2 +- > arch/s390/kernel/machine_kexec_file.c | 35 +++++++++++++------------ > 7 files changed, 39 insertions(+), 50 deletions(-) >
On Thu, Feb 17, 2022 at 08:02:45PM +0100, frank.heimes@canonical.com wrote:
> BugLink: https://bugs.launchpad.net/bugs/1960580
BugLink: https://bugs.launchpad.net/bugs/1960580 Allow to handle command lines with a length of up to 4096 bytes by kernel. It happened in the past that our supported command line size of 896 bytes was sometimes too short - while x86, powerpc, and arm each support 2048 bytes. This requires: - an ABI interface to the kernel image, so that tools can figure out if the kernel supports large command lines (might be a feature bitmap at a fixed location) - zipl, genprotimg, qemu, kexec-tools and changes (depending on the kernel side implementation) - in-kernel ipl support changes (IPL from reader) v2: converted 277c8389386e ("390/kexec_file: move kernel image size check") into a backport, due to required context adjustments Sven Schnelle (2): s390/kexec_file: move kernel image size check s390: support command lines longer than 896 bytes arch/s390/boot/head.S | 37 +++++++++------------------ arch/s390/boot/ipl_parm.c | 4 +-- arch/s390/include/asm/setup.h | 8 +++--- arch/s390/include/uapi/asm/setup.h | 2 -- arch/s390/kernel/asm-offsets.c | 1 + arch/s390/kernel/early.c | 2 +- arch/s390/kernel/machine_kexec_file.c | 35 +++++++++++++------------ 7 files changed, 39 insertions(+), 50 deletions(-)