kernel/linux.git/arch/s390/include/asm/setup.h, branch v6.19.12

s390/nmi: Print additional information

2025-06-26T13:30:51+00:00

In case of an unrecoverable machine check only the machine check interrupt code is printed to the console before the machine is stopped. This makes root cause analysis sometimes hard. Print additional machine check information to make analysis easier. The output now looks like this: Unrecoverable machine check, code: 00400F5F4C3B0000 6.16.0-rc2-11605-g987a9431e53a-dirty HW: IBM 3931 A01 704 (z/VM 7.4.0) PSW: 0706C00180000000 000003FFE0F0462E PFX: 0000000000070000 LBA: 000003FFE0F0462A EDC: 0000000000000000 FSA: 0000000000000000 CRS: 0080000014966A12 0000000087CB41C7 0000000000BFF140 0000000000000000 000000000000FFFF 0000000000BFF140 0000000071000000 0000000087CB41C7 0000000000008000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000024C0007 00000000DB000000 0000000000BFF000 GPRS: FFFFFFFF00000000 000003FFE0F0462E E10EA4F489F897A6 0000000000000000 7FFFFFF2C0413C4C 000003FFE19B7010 0000000000000000 0000000000000000 0000000000000000 00000001F76B3380 000003FFE15D4050 0000000000000005 0000000000000000 0000000000070000 000003FFE0F0586C 0000037FE00B7DA0 System stopped Reviewed-by: Alexander Gordeev Signed-off-by: Heiko Carstens Signed-off-by: Alexander Gordeev

s390: Replace ASSEMBLY with ASSEMBLER in non-uapi headers

2025-06-16T14:23:02+00:00

While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembler code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This is bad since macros starting with two underscores are names that are reserved by the C language. It can also be very confusing for the developers when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's now standardize on the __ASSEMBLER__ macro that is provided by the compilers. This is a completely mechanical patch (done with a simple "sed -i" statement), with some manual fixups done later while rebasing the patch. Signed-off-by: Thomas Huth Acked-by: Heiko Carstens Link: https://lore.kernel.org/r/20250611140046.137739-3-thuth@redhat.com Signed-off-by: Alexander Gordeev

s390: Convert MACHINE_IS_[LPAR|VM|KVM], etc, machine_is_[lpar|vm|kvm]()

2025-03-04T16:18:07+00:00

Move machine type detection to the decompressor and use static branches to implement and use machine_is_[lpar|vm|kvm]() instead of a runtime check via MACHINE_IS_[LPAR|VM|KVM]. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/diag: Convert MACHINE_HAS_DIAG9C to machine_has_diag9c()

2025-03-04T16:18:06+00:00

Use static branch(es) to implement and use machine_has_diag9c() instead of a runtime check via MACHINE_HAS_DIAG9C. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/kvm: Convert MACHINE_HAS_ESOP to machine_has_esop()

2025-03-04T16:18:06+00:00

Use static branch(es) to implement and use machine_has_esop() instead of a runtime check via MACHINE_HAS_ESOP. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/tx: Convert MACHINE_HAS_TE to machine_has_tx()

2025-03-04T16:18:06+00:00

Use static branch(es) to implement and use machine_has_tx() instead of a runtime check with MACHINE_HAS_TE. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/tlb: Convert MACHINE_HAS_TLB_GUEST to machine_has_tlb_guest()

2025-03-04T16:18:06+00:00

Use static branch(es) to implement and use machine_has_tlb_guest() instead of a runtime check via MACHINE_HAS_TLB_GUEST. Also add sclp_early_detect_machine_features() in order to allow for feature detection from the decompressor. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/time: Convert MACHINE_HAS_SCC to machine_has_scc()

2025-03-04T16:18:06+00:00

Use static branch(es) to implement and use machine_has_scc() instead of a runtime check via MACHINE_HAS_SCC. This comes with a cleanup of early time initialization: the initial tod_clock_base value is now passed via the bootdata mechanism, instead of using absolute lowcore as transport vehicle from the decompressor to the kernel. Also the early tod clock initialization is moved to the decompressor which allows to use a static branch with machine_has_scc() within the kernel. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/pci: Get rid of MACHINE_HAS_PCI_MIO

2025-03-04T16:18:06+00:00

Remove MACHINE_FLAG_PCI_MIO/MACHINE_HAS_PCI_MIO and implement the identical functionality with set_machine_feature(), clear_machine_feature() and test_machine_feature(). Acked-by: Niklas Schnelle Tested-by: Niklas Schnelle Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/cpufeature: Convert MACHINE_HAS_IDTE to cpu_has_idte()

2025-03-04T16:18:05+00:00

Convert MACHINE_HAS_... to cpu_has_...() which uses test_facility() instead of testing the machine_flags lowcore member if the feature is present. test_facility() generates better code since it results in a static branch without accessing memory. The branch is patched via alternatives by the decompressor depending on the availability of the required facility. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

kernel/linux.git/arch/s390/include/asm/setup.h, branch v6.19.12

s390/nmi: Print additional information

s390: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers

s390: Convert MACHINE_IS_[LPAR|VM|KVM], etc, machine_is_[lpar|vm|kvm]()

s390/diag: Convert MACHINE_HAS_DIAG9C to machine_has_diag9c()

s390/kvm: Convert MACHINE_HAS_ESOP to machine_has_esop()

s390/tx: Convert MACHINE_HAS_TE to machine_has_tx()

s390/tlb: Convert MACHINE_HAS_TLB_GUEST to machine_has_tlb_guest()

s390/time: Convert MACHINE_HAS_SCC to machine_has_scc()

s390/pci: Get rid of MACHINE_HAS_PCI_MIO

s390/cpufeature: Convert MACHINE_HAS_IDTE to cpu_has_idte()

s390: Replace ASSEMBLY with ASSEMBLER in non-uapi headers