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Ard Biesheuvel 0dd4f60a2c arm64: mm: Add support for folding PUDs at runtime 
In order to support LPA2 on 16k pages in a way that permits non-LPA2
systems to run the same kernel image, we have to be able to fall back to
at most 48 bits of virtual addressing.

Falling back to 48 bits would result in a level 0 with only 2 entries,
which is suboptimal in terms of TLB utilization. So instead, let's fall
back to 47 bits in that case. This means we need to be able to fold PUDs
dynamically, similar to how we fold P4Ds for 48 bit virtual addressing
on LPA2 with 4k pages.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240214122845.2033971-81-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2024-02-16 12:42:41 +00:00
..
pi
arm64: Enable LPA2 at boot if supported by the system
2024-02-16 12:42:40 +00:00
probes
arm64: kprobes: Drop ID map text from kprobes blacklist
2023-02-07 18:25:10 +00:00
vdso
kbuild: unify vdso_install rules
2023-10-28 21:09:02 +09:00
vdso32
arm64: vdso32: Remove unused vdso32-offsets.h
2024-01-30 11:59:17 +00:00
.gitignore
…
acpi_numa.c
arm64: numa: Don't check node against MAX_NUMNODES
2022-07-19 19:10:28 +01:00
acpi_parking_protocol.c
arm64: smp: Remove dedicated wakeup IPI
2023-09-25 17:15:28 +01:00
acpi.c
arm64: acpi: Fix possible memory leak of ffh_ctxt
2023-02-24 14:21:49 +00:00
alternative.c
Merge branches 'for-next/kpti', 'for-next/missing-proto-warn', 'for-next/iss2-decode', 'for-next/kselftest', 'for-next/misc', 'for-next/feat_mops', 'for-next/module-alloc', 'for-next/sysreg', 'for-next/cpucap', 'for-next/acpi', 'for-next/kdump', 'for-next/acpi-doc', 'for-next/doc' and 'for-next/tpidr2-fix', remote-tracking branch 'arm64/for-next/perf' into for-next/core
2023-06-23 18:32:20 +01:00
armv8_deprecated.c
arm: Remove now superfluous sentinel elem from ctl_table arrays
2023-10-10 15:22:02 -07:00
asm-offsets.c
arm64: fpsimd: Bring cond_yield asm macro in line with new rules
2024-01-12 12:48:27 +00:00
cacheinfo.c
cacheinfo: Add arm64 early level initializer implementation
2023-04-13 09:32:33 +01:00
compat_alignment.c
arm64: compat: Work around uninitialized variable warning
2023-04-05 17:51:47 +01:00
cpu_errata.c
arm64: errata: Add Cortex-A510 speculative unprivileged load workaround
2024-01-12 12:51:33 +00:00
cpu_ops.c
…
cpu-reset.S
arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text
2023-05-02 12:42:22 +01:00
cpufeature.c
arm64: mm: Add support for folding PUDs at runtime
2024-02-16 12:42:41 +00:00
cpuidle.c
arm64: Explicitly include correct DT includes
2023-07-31 14:45:38 +01:00
cpuinfo.c
arm64: Kill detection of VPIPT i-cache policy
2023-12-05 11:38:03 +00:00
crash_core.c
arm64: move PAC masks to <asm/pointer_auth.h>
2023-04-13 12:27:11 +01:00
crash_dump.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
debug-monitors.c
arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step
2023-04-14 13:39:47 +01:00
efi-header.S
arm64: efi: Enable BTI codegen and add PE/COFF annotation
2023-04-20 15:43:45 +02:00
efi-rt-wrapper.S
arm64: efi: Avoid workqueue to check whether EFI runtime is live
2023-01-16 15:27:31 +01:00
efi.c
TTY/Serial changes for 6.7-rc1
2023-11-03 15:44:25 -10:00
elfcore.c
arm64: mte: Avoid the racy walk of the vma list during core dump
2023-01-05 15:12:12 +00:00
entry-common.c
arm64: syscall: unmask DAIF earlier for SVCs
2023-08-11 12:23:48 +01:00
entry-fpsimd.S
arm64/sme: Implement context switching for ZT0
2023-01-20 12:23:06 +00:00
entry-ftrace.S
arm64: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL
2023-06-20 18:38:37 -04:00
entry.S
arm64: entry: simplify kernel_exit logic
2024-01-18 11:00:09 +00:00
fpsimd.c
arm64/sme: Always exit sme_alloc() early with existing storage
2024-01-18 11:05:53 +00:00
ftrace.c
arm64: module: mandate MODULE_PLTS
2023-06-06 17:39:05 +01:00
head.S
arm64: Enable LPA2 at boot if supported by the system
2024-02-16 12:42:40 +00:00
hibernate-asm.S
arm64: kexec: install a copy of the linear-map
2021-10-01 13:31:00 +01:00
hibernate.c
arm64: hibernate: remove WARN_ON in save_processor_state
2023-06-21 13:33:49 +01:00
hw_breakpoint.c
hw_breakpoint: fix single-stepping when using bpf_overflow_handler
2023-08-18 17:04:09 +01:00
hyp-stub.S
ARM64:
2023-07-03 15:32:22 -07:00
idle.c
arm64: idle: Tag the arm64 idle functions as __cpuidle
2023-09-25 17:15:28 +01:00
image-vars.h
arm64: Enable LPA2 at boot if supported by the system
2024-02-16 12:42:40 +00:00
image.h
…
io.c
…
irq.c
arm64: irq: set the correct node for shadow call stack
2023-12-13 12:09:00 +00:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kaslr.c
arm64: kaslr: Use feature override instead of parsing the cmdline again
2024-02-16 12:42:31 +00:00
kexec_image.c
kexec_file, arm64: print out debugging message if required
2023-12-20 15:02:57 -08:00
kgdb.c
arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step
2023-04-14 13:39:47 +01:00
kuser32.S
arm64: Update Documentation/arm references
2023-06-12 06:33:48 -06:00
machine_kexec_file.c
kexec_file, arm64: print out debugging message if required
2023-12-20 15:02:57 -08:00
machine_kexec.c
kexec_file, arm64: print out debugging message if required
2023-12-20 15:02:57 -08:00
Makefile
arm64: head: move dynamic shadow call stack patching into early C runtime
2024-02-16 12:42:30 +00:00
module-plts.c
Merge branch 'for-next/cpus_have_const_cap' into for-next/core
2023-10-26 17:10:18 +01:00
module.c
arm64: head: move dynamic shadow call stack patching into early C runtime
2024-02-16 12:42:30 +00:00
mte.c
Many singleton patches against the MM code. The patch series which are
2023-11-02 19:38:47 -10:00
paravirt.c
arm64: paravirt: remove conduit check in has_pv_steal_clock
2022-11-09 18:11:56 +00:00
patching.c
arm64: patching: Add aarch64_insn_write_literal_u64()
2023-01-24 11:49:43 +00:00
pci.c
arm64: Explicitly include correct DT includes
2023-07-31 14:45:38 +01:00
perf_callchain.c
arm64: use XPACLRI to strip PAC
2023-04-13 12:27:11 +01:00
perf_regs.c
perf: arm64: Add SVE vector granule register to user regs
2022-09-22 15:06:02 +01:00
pointer_auth.c
arm64: move preemption disablement to prctl handlers
2021-07-28 18:33:49 +01:00
process.c
sysctl-6.7-rc1
2023-11-01 20:51:41 -10:00
proton-pack.c
arm64: Avoid cpus_have_const_cap() for ARM64_UNMAP_KERNEL_AT_EL0
2023-10-16 14:17:06 +01:00
psci.c
treewide: Drop function_nocfi
2022-09-26 10:13:14 -07:00
ptrace.c
arm64 fixes for -rc1
2024-01-19 13:36:15 -08:00
reloc_test_core.c
ARM64: reloc_test: add __init/__exit annotations to module init/exit funcs
2022-09-29 18:04:25 +01:00
reloc_test_syms.S
…
relocate_kernel.S
arm64: kexec: load from kimage prior to clobbering
2022-05-17 14:25:35 +01:00
return_address.c
arm64: Make return_address() use arch_stack_walk()
2021-12-10 14:06:04 +00:00
sdei.c
arm64: sdei: abort running SDEI handlers during crash
2023-08-04 17:35:33 +01:00
setup.c
arm64: head: Move early kernel mapping routines into C code
2024-02-16 12:42:33 +00:00
signal32.c
x86/shstk: Add user control-protection fault handler
2023-08-02 15:01:50 -07:00
signal.c
Add x86 shadow stack support
2023-08-31 12:20:12 -07:00
sigreturn32.S
arm64: compat: Move sigreturn32.S to .rodata section
2022-07-01 12:05:45 +01:00
sleep.S
arm64: mm: Handle LVA support as a CPU feature
2024-02-16 12:42:36 +00:00
smccc-call.S
arm64: smccc: Save lr before calling __arm_smccc_sve_check()
2021-07-21 11:23:25 +01:00
smp_spin_table.c
treewide: Drop function_nocfi
2022-09-26 10:13:14 -07:00
smp.c
arm64: Align boot cpucap handling with system cpucap handling
2023-12-13 16:02:01 +00:00
stacktrace.c
arm64: stacktrace: factor out kunwind_stack_walk()
2023-12-11 11:42:55 +00:00
suspend.c
arm64: Avoid cpus_have_const_cap() for ARM64_HAS_DIT
2023-10-16 14:17:04 +01:00
sys32.c
…
sys_compat.c
arm64: Avoid cpus_have_const_cap() for ARM64_WORKAROUND_1542419
2023-10-16 14:17:06 +01:00
sys.c
…
syscall.c
arm64: syscall: unmask DAIF earlier for SVCs
2023-08-11 12:23:48 +01:00
time.c
arm64: Make profile_pc() use arch_stack_walk()
2021-12-10 14:06:04 +00:00
topology.c
arm64/amu: Use capacity_ref_freq() to set AMU ratio
2023-12-23 15:52:36 +01:00
trace-events-emulation.h
…
traps.c
ARM:
2023-11-02 15:45:15 -10:00
vdso32-wrap.S
…
vdso-wrap.S
…
vdso.c
arm64: Avoid cpus_have_const_cap() for ARM64_HAS_BTI
2023-10-16 14:17:04 +01:00
vmlinux.lds.S
arm64: head: Move early kernel mapping routines into C code
2024-02-16 12:42:33 +00:00
watchdog_hld.c
arm64: enable perf events based hard lockup detector
2023-06-09 17:44:22 -07:00