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arm64 fixes:
- Ensure that the compiler and linker versions are aligned so that ld doesn't complain about not understanding a .note.gnu.property section (emitted when pointer authentication is enabled). - Force -mbranch-protection=none when the feature is not enabled, in case a compiler may choose a different default value. - Remove CONFIG_DEBUG_ALIGN_RODATA. It was never in defconfig and rarely enabled. - Fix checking 16-bit Thumb-2 instructions checking mask in the emulation of the SETEND instruction (it could match the bottom half of a 32-bit Thumb-2 instruction). -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAl6PUYAACgkQa9axLQDI XvH83g/7B5v0RFqjqVW4/cQKoN1rii7qSA8pBfNgGiCMJKtoGvliAlp3xWEtlW0h nYJ4gCvey946r5kvZrjdBXC/Ulo2CcGYtX0n8d+8IB6wXAnGcQ0DUBUFZ4+fAU9Z F7+R7its24dma9R1wIFHFmQUdlO+EgQTfQFvhQKYMSNVaFQF73Sp/vk3oKhJ2E0x QevgDBQSmmcX3DFxhUW7BdcdboBgtTDUGdhcImdorgp7QmI1r40espJKX4VMKvmb pfzwg+i7KM6N1RDhRfA2oFMegXwI3rvM3XesqYaua8+xWD5vJuIQfq+ysEq9F9x/ Hnu+W9nbcN8RKQ9JToiqkE7ifuOBTvaIJaqsgIXYSqtYjatuPAh85MkrorHi9Ji2 9i7fc0GMTgtgYDo/93++l8SmmRJMX+h+9KtGtxx39+UqGjToJMCnPGjwBSwe4wdK lKOAgj488HHsNwTlrRUnq1hXjNjd1w+ON7JM2L3IyRNX/eWN60VxwzwHkZMByCOj jlcY4ISWquigW4w9Sp4nxEhLF9dWT1+OrE33Xh3CUxPU94jSEvgcDHcxuGeGOlrA QjN1B2APZFox8XbOsLgeG2kKe5C3Fui90SEn0GyA0ncVLsXDI78VnVJR9uz5+6Pd ALVQKkJxswhSDPQFlH+7CmQAcr8jWyLEEvyXXaZsoJmewzCpEPM= =pHRG -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Ensure that the compiler and linker versions are aligned so that ld doesn't complain about not understanding a .note.gnu.property section (emitted when pointer authentication is enabled). - Force -mbranch-protection=none when the feature is not enabled, in case a compiler may choose a different default value. - Remove CONFIG_DEBUG_ALIGN_RODATA. It was never in defconfig and rarely enabled. - Fix checking 16-bit Thumb-2 instructions checking mask in the emulation of the SETEND instruction (it could match the bottom half of a 32-bit Thumb-2 instruction). * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: armv8_deprecated: Fix undef_hook mask for thumb setend arm64: remove CONFIG_DEBUG_ALIGN_RODATA feature arm64: Always force a branch protection mode when the compiler has one arm64: Kconfig: ptrauth: Add binutils version check to fix mismatch init/kconfig: Add LD_VERSION Kconfig
This commit is contained in:
Linus Torvalds
commit
87ebc45d2d
@ -1502,7 +1502,10 @@ config ARM64_PTR_AUTH
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default y
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depends on !KVM || ARM64_VHE
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depends on (CC_HAS_SIGN_RETURN_ADDRESS || CC_HAS_BRANCH_PROT_PAC_RET) && AS_HAS_PAC
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depends on CC_IS_GCC || (CC_IS_CLANG && AS_HAS_CFI_NEGATE_RA_STATE)
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# GCC 9.1 and later inserts a .note.gnu.property section note for PAC
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# which is only understood by binutils starting with version 2.33.1.
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depends on !CC_IS_GCC || GCC_VERSION < 90100 || LD_VERSION >= 233010000
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depends on !CC_IS_CLANG || AS_HAS_CFI_NEGATE_RA_STATE
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depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS)
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help
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Pointer authentication (part of the ARMv8.3 Extensions) provides
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@ -52,19 +52,6 @@ config DEBUG_WX
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If in doubt, say "Y".
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config DEBUG_ALIGN_RODATA
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depends on STRICT_KERNEL_RWX
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bool "Align linker sections up to SECTION_SIZE"
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help
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If this option is enabled, sections that may potentially be marked as
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read only or non-executable will be aligned up to the section size of
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the kernel. This prevents sections from being split into pages and
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avoids a potential TLB penalty. The downside is an increase in
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alignment and potentially wasted space. Turn on this option if
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performance is more important than memory pressure.
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If in doubt, say N.
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config DEBUG_EFI
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depends on EFI && DEBUG_INFO
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bool "UEFI debugging"
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@ -65,6 +65,10 @@ stack_protector_prepare: prepare0
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include/generated/asm-offsets.h))
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endif
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# Ensure that if the compiler supports branch protection we default it
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# off, this will be overridden if we are using branch protection.
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branch-prot-flags-y += $(call cc-option,-mbranch-protection=none)
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ifeq ($(CONFIG_ARM64_PTR_AUTH),y)
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branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all
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branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pac-ret+leaf
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@ -73,9 +77,10 @@ branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pa
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# we pass it only to the assembler. This option is utilized only in case of non
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# integrated assemblers.
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branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a
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KBUILD_CFLAGS += $(branch-prot-flags-y)
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endif
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KBUILD_CFLAGS += $(branch-prot-flags-y)
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ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
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KBUILD_CPPFLAGS += -mbig-endian
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CHECKFLAGS += -D__AARCH64EB__
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@ -120,22 +120,12 @@
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/*
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* Alignment of kernel segments (e.g. .text, .data).
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*/
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#if defined(CONFIG_DEBUG_ALIGN_RODATA)
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/*
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* 4 KB granule: 1 level 2 entry
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* 16 KB granule: 128 level 3 entries, with contiguous bit
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* 64 KB granule: 32 level 3 entries, with contiguous bit
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*/
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#define SEGMENT_ALIGN SZ_2M
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#else
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/*
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*
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* 4 KB granule: 16 level 3 entries, with contiguous bit
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* 16 KB granule: 4 level 3 entries, without contiguous bit
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* 64 KB granule: 1 level 3 entry
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*/
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#define SEGMENT_ALIGN SZ_64K
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#endif
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/*
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* Memory types available.
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@ -601,7 +601,7 @@ static struct undef_hook setend_hooks[] = {
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},
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{
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/* Thumb mode */
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.instr_mask = 0x0000fff7,
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.instr_mask = 0xfffffff7,
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.instr_val = 0x0000b650,
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.pstate_mask = (PSR_AA32_T_BIT | PSR_AA32_MODE_MASK),
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.pstate_val = (PSR_AA32_T_BIT | PSR_AA32_MODE_USR),
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@ -75,14 +75,12 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
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if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && phys_seed != 0) {
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/*
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* If CONFIG_DEBUG_ALIGN_RODATA is not set, produce a
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* displacement in the interval [0, MIN_KIMG_ALIGN) that
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* doesn't violate this kernel's de-facto alignment
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* Produce a displacement in the interval [0, MIN_KIMG_ALIGN)
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* that doesn't violate this kernel's de-facto alignment
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* constraints.
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*/
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u32 mask = (MIN_KIMG_ALIGN - 1) & ~(EFI_KIMG_ALIGN - 1);
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u32 offset = !IS_ENABLED(CONFIG_DEBUG_ALIGN_RODATA) ?
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(phys_seed >> 32) & mask : TEXT_OFFSET;
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u32 offset = (phys_seed >> 32) & mask;
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/*
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* With CONFIG_RANDOMIZE_TEXT_OFFSET=y, TEXT_OFFSET may not
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@ -16,6 +16,10 @@ config GCC_VERSION
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default $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) if CC_IS_GCC
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default 0
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config LD_VERSION
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int
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default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh)
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config CC_IS_CLANG
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def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
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