pm24.git/arch/s390, branch perf-mon

Merge tag 'kvm-s390-next-6.14-2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

2025-02-04T16:14:21Z

- some selftest fixes - move some kvm-related functions from mm into kvm - remove all usage of page->index and page->lru from kvm - fixes and cleanups for vsie

Merge tag 'kbuild-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2025-01-31T20:07:07Z

Pull Kbuild updates from Masahiro Yamada: - Support multiple hook locations for maint scripts of Debian package - Remove 'cpio' from the build tool requirement - Introduce gendwarfksyms tool, which computes CRCs for export symbols based on the DWARF information - Support CONFIG_MODVERSIONS for Rust - Resolve all conflicts in the genksyms parser - Fix several syntax errors in genksyms * tag 'kbuild-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (64 commits) kbuild: fix Clang LTO with CONFIG_OBJTOOL=n kbuild: Strip runtime const RELA sections correctly kconfig: fix memory leak in sym_warn_unmet_dep() kconfig: fix file name in warnings when loading KCONFIG_DEFCONFIG_LIST genksyms: fix syntax error for attribute before init-declarator genksyms: fix syntax error for builtin (u)int*x*_t types genksyms: fix syntax error for attribute after 'union' genksyms: fix syntax error for attribute after 'struct' genksyms: fix syntax error for attribute after abstact_declarator genksyms: fix syntax error for attribute before nested_declarator genksyms: fix syntax error for attribute before abstract_declarator genksyms: decouple ATTRIBUTE_PHRASE from type-qualifier genksyms: record attributes consistently for init-declarator genksyms: restrict direct-declarator to take one parameter-type-list genksyms: restrict direct-abstract-declarator to take one parameter-type-list genksyms: remove Makefile hack genksyms: fix last 3 shift/reduce conflicts genksyms: fix 6 shift/reduce conflicts and 5 reduce/reduce conflicts genksyms: reduce type_qualifier directly to decl_specifier genksyms: rename cvar_qualifier to type_qualifier ...

kbuild: Strip runtime const RELA sections correctly

2025-01-31T19:28:05Z

Due to the fact that runtime const ELF sections are named without a leading period or double underscore, the RSTRIP logic that removes the static RELA sections from vmlinux fails to identify them. This results in a situation like below, where some sections that were supposed to get removed are left behind. [Nr] Name Type Address Off Size ES Flg Lk Inf Al [58] runtime_shift_d_hash_shift PROGBITS ffffffff83500f50 2900f50 000014 00 A 0 0 1 [59] .relaruntime_shift_d_hash_shift RELA 0000000000000000 55b6f00 000078 18 I 70 58 8 [60] runtime_ptr_dentry_hashtable PROGBITS ffffffff83500f68 2900f68 000014 00 A 0 0 1 [61] .relaruntime_ptr_dentry_hashtable RELA 0000000000000000 55b6f78 000078 18 I 70 60 8 [62] runtime_ptr_USER_PTR_MAX PROGBITS ffffffff83500f80 2900f80 000238 00 A 0 0 1 [63] .relaruntime_ptr_USER_PTR_MAX RELA 0000000000000000 55b6ff0 000d50 18 I 70 62 8 So tweak the match expression to strip all sections starting with .rel. While at it, consolidate the logic used by RISC-V, s390 and x86 into a single shared Makefile library command. Link: https://lore.kernel.org/all/CAHk-=wjk3ynjomNvFN8jf9A1k=qSc=JFF591W00uXj-qqNUxPQ@mail.gmail.com/ Signed-off-by: Ard Biesheuvel Reviewed-by: Charlie Jenkins Tested-by: Charlie Jenkins Tested-by: Alexander Gordeev Signed-off-by: Masahiro Yamada

KVM: s390: remove the last user of page->index

2025-01-31T11:03:53Z

Shadow page tables use page->index to keep the g2 address of the guest page table being shadowed. Instead of keeping the information in page->index, split the address and smear it over the 16-bit softbits areas of 4 PGSTEs. This removes the last s390 user of page->index. Reviewed-by: Steffen Eiden Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-16-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-16-imbrenda@linux.ibm.com>

KVM: s390: move PGSTE softbits

2025-01-31T11:03:53Z

Move the softbits in the PGSTEs to the other usable area. This leaves the 16-bit block of usable bits free, which will be used in the next patch for something else. Reviewed-by: Steffen Eiden Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-15-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-15-imbrenda@linux.ibm.com>

KVM: s390: remove useless page->index usage

2025-01-31T11:03:53Z

The page->index field for VSIE dat tables is only used for segment tables. Stop setting the field for all region tables. Reviewed-by: Janosch Frank Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-14-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-14-imbrenda@linux.ibm.com>

KVM: s390: move gmap_shadow_pgt_lookup() into kvm

2025-01-31T11:03:53Z

Move gmap_shadow_pgt_lookup() from mm/gmap.c into kvm/gaccess.c . Reviewed-by: Steffen Eiden Reviewed-by: Janosch Frank Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-13-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-13-imbrenda@linux.ibm.com>

KVM: s390: stop using lists to keep track of used dat tables

2025-01-31T11:03:53Z

Until now, every dat table allocated to map a guest was put in a linked list. The page->lru field of struct page was used to keep track of which pages were being used, and when the gmap is torn down, the list was walked and all pages freed. This patch gets rid of the usage of page->lru. Page tables are now freed by recursively walking the dat table tree. Since s390_unlist_old_asce() becomes useless now, remove it. Acked-by: Steffen Eiden Reviewed-by: Janosch Frank Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-12-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-12-imbrenda@linux.ibm.com>

KVM: s390: stop using page->index for non-shadow gmaps

2025-01-31T11:03:53Z

The host_to_guest radix tree will now map userspace addresses to guest addresses, instead of userspace addresses to segment tables. When segment tables and page tables are needed, they are found using an additional gmap_table_walk(). This gets rid of all usage of page->index for non-shadow gmaps. Reviewed-by: Janosch Frank Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-11-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-11-imbrenda@linux.ibm.com>

KVM: s390: move some gmap shadowing functions away from mm/gmap.c

2025-01-31T11:03:52Z

Move some gmap shadowing functions from mm/gmap.c to kvm/kvm-s390.c and the newly created kvm/gmap-vsie.c This is a step toward removing gmap from mm. Reviewed-by: Janosch Frank Reviewed-by: Christoph Schlameuss Link: https://lore.kernel.org/r/20250123144627.312456-10-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda Message-ID: <20250123144627.312456-10-imbrenda@linux.ibm.com>