Linus Torvalds a5819099f6 Merge branch 'runtime-constants' ... Merge runtime constants infrastructure with implementations for x86 and arm64. This is one of four branches that came out of me looking at profiles of my kernel build filesystem load on my 128-core Altra arm64 system, where pathname walking and the user copies (particularly strncpy_from_user() for fetching the pathname from user space) is very hot. This is a very specialized "instruction alternatives" model where the dentry hash pointer and hash count will be constants for the lifetime of the kernel, but the allocation are not static but done early during the kernel boot. In order to avoid the pointer load and dynamic shift, we just rewrite the constants in the instructions in place. We can't use the "generic" alternative instructions infrastructure, because different architectures do it very differently, and it's actually simpler to just have very specific helpers, with a fallback to the generic ("old") model of just using variables for architectures that do not implement the runtime constant patching infrastructure. Link: https://lore.kernel.org/all/CAHk-=widPe38fUNjUOmX11ByDckaeEo9tN4Eiyke9u1SAtu9sA@mail.gmail.com/ * runtime-constants: arm64: add 'runtime constant' support runtime constants: add x86 architecture support runtime constants: add default dummy infrastructure vfs: dcache: move hashlen_hash() from callers into d_hash()		2024-07-15 08:36:13 -07:00
..
acpi	ACPI updates for 6.9-rc1	2024-03-13 11:54:05 -07:00
apic	genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline	2024-05-23 21:51:50 +02:00
cpu	x86/resctrl: Don't try to free nonexistent RMIDs	2024-06-19 11:39:09 +02:00
fpu	ARM:	2024-05-15 14:46:43 -07:00
kprobes	Probes updates for v6.10:	2024-05-17 18:29:30 -07:00
.gitignore
alternative.c	x86/alternatives: Use the correct length when optimizing NOPs	2024-05-17 09:27:06 +02:00
amd_gart_64.c	change alloc_pages name in dma_map_ops to avoid name conflicts	2024-04-25 20:55:53 -07:00
amd_nb.c	x86/amd_nb: Check for invalid SMN reads	2024-06-05 21:23:34 +02:00
aperture_64.c	x86/pci: Use PCI_HEADER_TYPE_* instead of literals	2023-12-01 15:00:43 -06:00
apm_32.c	x86/apm_32: Remove dead function apm_get_battery_status()	2024-02-21 19:38:03 +01:00
asm-offsets_32.c
asm-offsets_64.c	x86: Fixup asm-offsets duplicate	2022-10-17 16:41:06 +02:00
asm-offsets.c	x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING	2024-01-10 10:52:28 +01:00
audit_64.c	x86/audit: Fix -Wmissing-variable-declarations warning for ia32_xyz_class	2023-08-30 10:11:16 +02:00
bootflag.c
callthunks.c	x86/alternatives: Use a temporary buffer when optimizing NOPs	2024-04-09 18:08:11 +02:00
cet.c	x86/ibt: Convert IBT selftest to asm	2023-08-17 17:07:09 +02:00
cfi.c	cfi: Flip headers	2023-12-15 16:25:55 -08:00
check.c
cpuid.c	x86/cpuid: make cpuid_class a static const structure	2023-08-05 08:31:41 +02:00
crash_dump_32.c
crash_dump_64.c	use less confusing names for iov_iter direction initializers	2022-11-25 13:01:55 -05:00
crash.c	crash: add a new kexec flag for hotplug support	2024-04-23 14:59:01 +10:00
devicetree.c	x86/of: Change x86_dtb_parse_smp_config() to static	2024-04-03 08:49:56 +02:00
doublefault_32.c	x86: Avoid missing-prototype warnings for doublefault code	2023-05-18 11:56:18 -07:00
dumpstack_32.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
dumpstack_64.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
dumpstack.c	x86/dumpstack: Use uniform "Oops: " prefix for die() messages	2024-03-27 08:45:19 +01:00
e820.c	x86/e820: Add a new e820 table update helper	2024-04-29 11:15:31 +02:00
early_printk.c
early-quirks.c	x86/pci: Use PCI_HEADER_TYPE_* instead of literals	2023-12-01 15:00:43 -06:00
ebda.c
eisa.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00
espfix_64.c	x86/fred: No ESPFIX needed when FRED is enabled	2024-01-31 22:01:51 +01:00
fred.c	x86/fred: Add FRED initialization functions	2024-01-31 22:03:32 +01:00
ftrace_32.S	x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>	2023-10-03 10:38:07 +02:00
ftrace_64.S	x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>	2023-10-03 10:38:07 +02:00
ftrace.c	x86/ftrace: enable dynamic ftrace without CONFIG_MODULES	2024-05-14 00:31:44 -07:00
head32.c	x86/microcode/32: Move early loading after paging enable	2023-10-18 22:15:01 +02:00
head64.c	x86/boot/64: Move 5-level paging global variable assignments back	2024-03-24 05:00:36 +01:00
head_32.S	x86/cleanups changes for v6.10:	2024-05-13 18:21:24 -07:00
head_64.S	x86/cleanups changes for v6.10:	2024-05-13 18:21:24 -07:00
hpet.c	x86/apic/msi: Use DOMAIN_BUS_GENERIC_MSI for HPET/IO-APIC domain search	2024-02-25 18:53:08 +01:00
hw_breakpoint.c	x86/amd: Cache debug register values in percpu variables	2023-01-31 20:09:26 +01:00
i8237.c
i8253.c
i8259.c	x86/i8259: Skip probing when ACPI/MADT advertises PCAT compatibility	2023-10-27 20:36:49 +02:00
ibt_selftest.S	x86/ibt: Convert IBT selftest to asm	2023-08-17 17:07:09 +02:00
idt.c	x86/irq: Install posted MSI notification handler	2024-04-30 00:54:42 +02:00
io_delay.c
ioport.c
irq_32.c	x86/percpu: Move irq_stack variables next to current_task	2022-10-17 16:41:05 +02:00
irq_64.c	fix missing vmalloc.h includes	2024-04-25 20:55:49 -07:00
irq_work.c	x86/apic: Wrap IPI calls into helper functions	2023-08-09 12:00:55 -07:00
irq.c	x86/irq: Factor out common code for checking pending interrupts	2024-04-30 00:54:43 +02:00
irqflags.S	x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>	2023-10-03 10:38:07 +02:00
irqinit.c	x86/fred: Invoke FRED initialization code to enable FRED	2024-01-31 22:03:36 +01:00
itmt.c	arch/x86: Remove now superfluous sentinel elem from ctl_table arrays	2023-10-10 15:22:02 -07:00
jailhouse.c	x86/jailhouse: Use new APIC registration function	2024-02-15 22:07:42 +01:00
jump_label.c
kdebugfs.c
kexec-bzimage64.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
kgdb.c	x86/kgdb: Fix a kerneldoc warning when build with W=1	2023-09-24 11:00:13 +02:00
ksysfs.c
kvm.c	Linux 6.9-rc3	2024-04-09 09:48:09 +02:00
kvmclock.c	kvmclock: Unexport kvmclock clocksource	2024-02-07 17:05:21 +01:00
ldt.c	x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION	2024-01-10 10:52:28 +01:00
machine_kexec_32.c
machine_kexec_64.c	x86/kexec: Fix bug with call depth tracking	2024-06-03 17:19:03 +02:00
Makefile	Kbuild updates for v6.10	2024-05-18 12:39:20 -07:00
mmconf-fam10h_64.c
module.c	arch: make execmem setup available regardless of CONFIG_MODULES	2024-05-14 00:31:44 -07:00
mpparse.c	x86/mpparse: Register APIC address only once	2024-03-23 12:41:48 +01:00
msr.c	x86/MSR: make msr_class a static const structure	2023-08-05 08:31:42 +02:00
nmi_selftest.c	x86/apic: Wrap IPI calls into helper functions	2023-08-09 12:00:55 -07:00
nmi.c	x86/nmi: Upgrade NMI backtrace stall checks & messages	2024-03-26 10:07:59 +01:00
paravirt-spinlocks.c
paravirt.c	x86/paravirt: Remove no longer needed paravirt patching code	2023-12-10 23:34:37 +01:00
pci-dma.c	x86: always initialize xen-swiotlb when xen-pcifront is enabling	2023-07-31 17:54:27 +02:00
pcspeaker.c
perf_regs.c
platform-quirks.c	x86/quirks: Include linux/pnp.h for arch_pnpbios_disabled()	2023-05-18 11:56:18 -07:00
pmem.c
probe_roms.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00
process_32.c	x86/fpu: Clean up FPU switching in the middle of task switching	2023-10-20 11:24:22 +02:00
process_64.c	x86/cpu: Fix check for RDPKRU in __show_regs()	2024-04-24 14:30:21 +02:00
process.c	Core x86 changes for v6.9:	2024-03-11 19:53:15 -07:00
process.h
ptrace.c	x86: Add PTRACE interface for shadow stack	2023-08-02 15:01:51 -07:00
pvclock.c	locking/atomic: treewide: use raw_atomic*_<op>()	2023-06-05 09:57:20 +02:00
quirks.c
reboot_fixups_32.c
reboot.c	x86, crash: wrap crash dumping code into crash related ifdefs	2024-02-23 17:48:23 -08:00
relocate_kernel_32.S
relocate_kernel_64.S	x86,objtool: Split UNWIND_HINT_EMPTY in two	2023-03-23 23:18:58 +01:00
resource.c	x86/PCI: Tidy E820 removal messages	2022-12-10 10:33:11 -06:00
rethook.c
rtc.c	x86/rtc: Remove unused intel-mid.h	2024-04-03 08:24:48 -07:00
setup_percpu.c	x86/asm: Add DB flag to 32-bit percpu GDT entry	2023-12-20 10:57:51 +01:00
setup.c	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
sev_verify_cbit.S	x86/boot: Use 32-bit XOR to clear registers	2024-03-01 12:47:37 +01:00
sev-shared.c	x86/sev: Check for MWAITX and MONITORX opcodes in the #VC handler	2024-04-22 18:38:28 +02:00
sev.c	- Small cleanups and improvements	2024-05-14 09:18:52 -07:00
shstk.c	x86/shstk: Enable shadow stacks for x32	2024-03-22 10:17:11 +01:00
signal_32.c	x86/syscall/compat: Remove ia32_unistd.h	2024-03-22 09:37:09 +01:00
signal_64.c	x86/shstk: Enable shadow stacks for x32	2024-03-22 10:17:11 +01:00
signal.c	rseq: Split out rseq.h from sched.h	2023-12-27 11:49:56 -05:00
smp.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
smpboot.c	x86/cpu: Switch to new Intel CPU model defines	2024-04-29 10:31:30 +02:00
stacktrace.c
static_call.c	x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK	2024-01-10 10:52:29 +01:00
step.c	x86/msr: Prepare for including <linux/percpu.h> into <asm/msr.h>	2024-03-04 12:01:39 +01:00
sys_ia32.c
sys_x86_64.c	x86/mm: care about shadow stack guard gap during placement	2024-04-25 20:56:28 -07:00
tboot.c
time.c	x86: stop playing stack games in profile_pc()	2024-06-28 14:27:22 -07:00
tls.c	x86/gsseg: Move load_gs_index() to its own new header file	2023-01-12 13:06:36 +01:00
tls.h
trace_clock.c
trace.c
tracepoint.c
traps.c	Core x86 changes for v6.9:	2024-03-11 19:53:15 -07:00
tsc_msr.c	x86/tsc_msr: Switch to new Intel CPU model defines	2024-04-29 10:31:34 +02:00
tsc_sync.c	x86/tsc: Trust initial offset in architectural TSC-adjust MSRs	2024-04-29 23:27:16 +02:00
tsc.c	x86/cpu changes for v6.10:	2024-05-13 18:44:44 -07:00
umip.c
unwind_frame.c
unwind_guess.c
unwind_orc.c	x86/unwind/orc: Remove redundant initialization of 'mid' pointer in __orc_find()	2023-09-21 08:41:23 +02:00
uprobes.c	uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix	2022-12-05 11:55:18 +01:00
verify_cpu.S
vm86_32.c
vmcore_info_32.c	crash: split vmcoreinfo exporting code out from crash_core.c	2024-02-23 17:48:22 -08:00
vmcore_info_64.c	crash: split vmcoreinfo exporting code out from crash_core.c	2024-02-23 17:48:22 -08:00
vmlinux.lds.S	runtime constants: add x86 architecture support	2024-06-19 12:34:34 -07:00
vsmp_64.c	x86/apic: Remove unused phys_pkg_id() callback	2024-02-15 22:07:38 +01:00
x86_init.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00