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685d982112
Pull core x86 updates from Ingo Molnar:
- The biggest change is the rework of the percpu code, to support the
'Named Address Spaces' GCC feature, by Uros Bizjak:
- This allows C code to access GS and FS segment relative memory
via variables declared with such attributes, which allows the
compiler to better optimize those accesses than the previous
inline assembly code.
- The series also includes a number of micro-optimizations for
various percpu access methods, plus a number of cleanups of %gs
accesses in assembly code.
- These changes have been exposed to linux-next testing for the
last ~5 months, with no known regressions in this area.
- Fix/clean up __switch_to()'s broken but accidentally working handling
of FPU switching - which also generates better code
- Propagate more RIP-relative addressing in assembly code, to generate
slightly better code
- Rework the CPU mitigations Kconfig space to be less idiosyncratic, to
make it easier for distros to follow & maintain these options
- Rework the x86 idle code to cure RCU violations and to clean up the
logic
- Clean up the vDSO Makefile logic
- Misc cleanups and fixes
* tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
x86/idle: Select idle routine only once
x86/idle: Let prefer_mwait_c1_over_halt() return bool
x86/idle: Cleanup idle_setup()
x86/idle: Clean up idle selection
x86/idle: Sanitize X86_BUG_AMD_E400 handling
sched/idle: Conditionally handle tick broadcast in default_idle_call()
x86: Increase brk randomness entropy for 64-bit systems
x86/vdso: Move vDSO to mmap region
x86/vdso/kbuild: Group non-standard build attributes and primary object file rules together
x86/vdso: Fix rethunk patching for vdso-image-{32,64}.o
x86/retpoline: Ensure default return thunk isn't used at runtime
x86/vdso: Use CONFIG_COMPAT_32 to specify vdso32
x86/vdso: Use $(addprefix ) instead of $(foreach )
x86/vdso: Simplify obj-y addition
x86/vdso: Consolidate targets and clean-files
x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK
x86/bugs: Rename CONFIG_CPU_SRSO => CONFIG_MITIGATION_SRSO
x86/bugs: Rename CONFIG_CPU_IBRS_ENTRY => CONFIG_MITIGATION_IBRS_ENTRY
x86/bugs: Rename CONFIG_CPU_UNRET_ENTRY => CONFIG_MITIGATION_UNRET_ENTRY
x86/bugs: Rename CONFIG_SLS => CONFIG_MITIGATION_SLS
...
71 lines
2.3 KiB
Makefile
71 lines
2.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Kernel does not boot with instrumentation of tlb.c and mem_encrypt*.c
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KCOV_INSTRUMENT_tlb.o := n
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KCOV_INSTRUMENT_mem_encrypt.o := n
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KCOV_INSTRUMENT_mem_encrypt_amd.o := n
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KCOV_INSTRUMENT_mem_encrypt_identity.o := n
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KCOV_INSTRUMENT_pgprot.o := n
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KASAN_SANITIZE_mem_encrypt.o := n
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KASAN_SANITIZE_mem_encrypt_amd.o := n
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KASAN_SANITIZE_mem_encrypt_identity.o := n
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KASAN_SANITIZE_pgprot.o := n
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# Disable KCSAN entirely, because otherwise we get warnings that some functions
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# reference __initdata sections.
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KCSAN_SANITIZE := n
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# Avoid recursion by not calling KMSAN hooks for CEA code.
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KMSAN_SANITIZE_cpu_entry_area.o := n
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KMSAN_SANITIZE_mem_encrypt_identity.o := n
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ifdef CONFIG_FUNCTION_TRACER
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CFLAGS_REMOVE_mem_encrypt.o = -pg
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CFLAGS_REMOVE_mem_encrypt_amd.o = -pg
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CFLAGS_REMOVE_mem_encrypt_identity.o = -pg
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CFLAGS_REMOVE_pgprot.o = -pg
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endif
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obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \
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pgtable.o physaddr.o tlb.o cpu_entry_area.o maccess.o pgprot.o
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obj-y += pat/
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# Make sure __phys_addr has no stackprotector
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CFLAGS_physaddr.o := -fno-stack-protector
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CFLAGS_mem_encrypt_identity.o := -fno-stack-protector
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CFLAGS_fault.o := -I $(srctree)/$(src)/../include/asm/trace
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obj-$(CONFIG_X86_32) += pgtable_32.o iomap_32.o
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obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
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obj-$(CONFIG_PTDUMP_CORE) += dump_pagetables.o
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obj-$(CONFIG_PTDUMP_DEBUGFS) += debug_pagetables.o
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obj-$(CONFIG_HIGHMEM) += highmem_32.o
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KASAN_SANITIZE_kasan_init_$(BITS).o := n
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obj-$(CONFIG_KASAN) += kasan_init_$(BITS).o
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KMSAN_SANITIZE_kmsan_shadow.o := n
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obj-$(CONFIG_KMSAN) += kmsan_shadow.o
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obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
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mmiotrace-y := kmmio.o pf_in.o mmio-mod.o
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obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
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obj-$(CONFIG_NUMA) += numa.o numa_$(BITS).o
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obj-$(CONFIG_AMD_NUMA) += amdtopology.o
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obj-$(CONFIG_ACPI_NUMA) += srat.o
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obj-$(CONFIG_NUMA_EMU) += numa_emulation.o
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obj-$(CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) += pkeys.o
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obj-$(CONFIG_RANDOMIZE_MEMORY) += kaslr.o
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obj-$(CONFIG_MITIGATION_PAGE_TABLE_ISOLATION) += pti.o
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obj-$(CONFIG_X86_MEM_ENCRYPT) += mem_encrypt.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_amd.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_identity.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_boot.o
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