kernel/linux.git/arch/s390/include/asm/pgtable.h, branch linux-7.0.y

KVM: S390: Remove PGSTE code from linux/s390 mm

2026-02-04T16:00:10+00:00

Remove the PGSTE config option. Remove all code from linux/s390 mm that involves PGSTEs. Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

KVM: s390: Remove gmap from s390/mm

2026-02-04T16:00:10+00:00

Remove the now unused include/asm/gmap.h and mm/gmap.c files. Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

KVM: s390: Stop using CONFIG_PGSTE

2026-02-04T16:00:09+00:00

Switch to using IS_ENABLED(CONFIG_KVM) instead of CONFIG_PGSTE, since the latter will be removed soon. Many CONFIG_PGSTE are left behind, because they will be removed completely in upcoming patches. The ones replaced here are mostly the ones that will stay. Reviewed-by: Steffen Eiden Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

s390/mm: Warn if uv_convert_from_secure_pte() fails

2026-02-04T16:00:08+00:00

If uv_convert_from_secure_pte() fails, the page becomes unusable by the host. The failure can only occour in case of hardware malfunction or a serious KVM bug. When the unusable page is reused, the system can have issues and hang. Print a warning to aid debugging such unlikely scenarios. Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

s390: Move sske_frame() to a header

2026-02-04T16:00:08+00:00

Move the sske_frame() function to asm/pgtable.h, so it can be used in other modules too. Opportunistically convert the .insn opcode specification to the appropriate mnemonic. Reviewed-by: Christian Borntraeger Reviewed-by: Steffen Eiden Reviewed-by: Christoph Schlameuss Reviewed-by: Nina Schoetterl-Glausch Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

KVM: s390: Refactor pgste lock and unlock functions

2026-02-04T16:00:08+00:00

Move the pgste lock and unlock functions back into mm/pgtable.c and duplicate them in mm/gmap_helpers.c to avoid function name collisions later on. Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

Merge tag 's390-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2025-12-03T00:37:00+00:00

Pull s390 updates from Heiko Carstens: - Provide a new interface for dynamic configuration and deconfiguration of hotplug memory, allowing with and without memmap_on_memory support. This makes the way memory hotplug is handled on s390 much more similar to other architectures - Remove compat support. There shouldn't be any compat user space around anymore, therefore get rid of a lot of code which also doesn't need to be tested anymore - Add stackprotector support. GCC 16 will get new compiler options, which allow to generate code required for kernel stackprotector support - Merge pai_crypto and pai_ext PMU drivers into a new driver. This removes a lot of duplicated code. The new driver is also extendable and allows to support new PMUs - Add driver override support for AP queues - Rework and extend zcrypt and AP trace events to allow for tracing of crypto requests - Support block sizes larger than 65535 bytes for CCW tape devices - Since the rework of the virtual kernel address space the module area and the kernel image are within the same 4GB area. This eliminates the need of weak per cpu variables. Get rid of ARCH_MODULE_NEEDS_WEAK_PER_CPU - Various other small improvements and fixes * tag 's390-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (92 commits) watchdog: diag288_wdt: Remove KMSG_COMPONENT macro s390/entry: Use lay instead of aghik s390/vdso: Get rid of -m64 flag handling s390/vdso: Rename vdso64 to vdso s390: Rename head64.S to head.S s390/vdso: Use common STABS_DEBUG and DWARF_DEBUG macros s390: Add stackprotector support s390/modules: Simplify module_finalize() slightly s390: Remove KMSG_COMPONENT macro s390/percpu: Get rid of ARCH_MODULE_NEEDS_WEAK_PER_CPU s390/ap: Restrict driver_override versus apmask and aqmask use s390/ap: Rename mutex ap_perms_mutex to ap_attr_mutex s390/ap: Support driver_override for AP queue devices s390/ap: Use all-bits-one apmask/aqmask for vfio in_use() checks s390/debug: Update description of resize operation s390/syscalls: Switch to generic system call table generation s390/syscalls: Remove system call table pointer from thread_struct s390/uapi: Remove 31 bit support from uapi header files s390: Remove compat support tools: Remove s390 compat support ...

s390/mm: Fix __ptep_rdp() inline assembly

2025-11-14T14:58:20+00:00

When a zero ASCE is passed to the __ptep_rdp() inline assembly, the generated instruction should have the R3 field of the instruction set to zero. However the inline assembly is written incorrectly: for such cases a zero is loaded into a register allocated by the compiler and this register is then used by the instruction. This means that selected TLB entries may not be flushed since the specified ASCE does not match the one which was used when the selected TLB entries were created. Fix this by removing the asce and opt parameters of __ptep_rdp(), since all callers always pass zero, and use a hard-coded register zero for the R3 field. Fixes: 0807b856521f ("s390/mm: add support for RDP (Reset DAT-Protection)") Cc: stable@vger.kernel.org Reviewed-by: Gerald Schaefer Signed-off-by: Heiko Carstens

s390/mm: Replace the CSP instruction with CSPG

2025-11-06T13:12:31+00:00

The CSPG instruction is part of the Dat-Enhancement facility 1, which is always available. Given that it can be used everywhere where also the CSP instruction can be used, replace CSP with CSPG everywhere. This allows to remove the csp() inline assembly. Also remove the unused gmap_pmdp_csp() function. Acked-by: Alexander Gordeev Reviewed-by: Claudio Imbrenda Signed-off-by: Heiko Carstens

Merge tag 'kvm-s390-next-6.18-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

2025-09-30T17:09:20+00:00

KVM: s390: A bugfix and a performance improvement * Improve interrupt cpu for wakeup, change the heuristic to decide wich vCPU to deliver a floating interrupt to. * Clear the pte when discarding a swapped page because of CMMA; this bug was introduced in 6.16 when refactoring gmap code.