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
|
|||
default y
|
||||
depends on !KVM || ARM64_VHE
|
||||
depends on (CC_HAS_SIGN_RETURN_ADDRESS || CC_HAS_BRANCH_PROT_PAC_RET) && AS_HAS_PAC
|
||||
depends on CC_IS_GCC || (CC_IS_CLANG && AS_HAS_CFI_NEGATE_RA_STATE)
|
||||
# GCC 9.1 and later inserts a .note.gnu.property section note for PAC
|
||||
# which is only understood by binutils starting with version 2.33.1.
|
||||
depends on !CC_IS_GCC || GCC_VERSION < 90100 || LD_VERSION >= 233010000
|
||||
depends on !CC_IS_CLANG || AS_HAS_CFI_NEGATE_RA_STATE
|
||||
depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS)
|
||||
help
|
||||
Pointer authentication (part of the ARMv8.3 Extensions) provides
|
||||
|
|
|
|||
|
|
@ -52,19 +52,6 @@ config DEBUG_WX
|
|||
|
||||
If in doubt, say "Y".
|
||||
|
||||
config DEBUG_ALIGN_RODATA
|
||||
depends on STRICT_KERNEL_RWX
|
||||
bool "Align linker sections up to SECTION_SIZE"
|
||||
help
|
||||
If this option is enabled, sections that may potentially be marked as
|
||||
read only or non-executable will be aligned up to the section size of
|
||||
the kernel. This prevents sections from being split into pages and
|
||||
avoids a potential TLB penalty. The downside is an increase in
|
||||
alignment and potentially wasted space. Turn on this option if
|
||||
performance is more important than memory pressure.
|
||||
|
||||
If in doubt, say N.
|
||||
|
||||
config DEBUG_EFI
|
||||
depends on EFI && DEBUG_INFO
|
||||
bool "UEFI debugging"
|
||||
|
|
|
|||
|
|
@ -65,6 +65,10 @@ stack_protector_prepare: prepare0
|
|||
include/generated/asm-offsets.h))
|
||||
endif
|
||||
|
||||
# Ensure that if the compiler supports branch protection we default it
|
||||
# off, this will be overridden if we are using branch protection.
|
||||
branch-prot-flags-y += $(call cc-option,-mbranch-protection=none)
|
||||
|
||||
ifeq ($(CONFIG_ARM64_PTR_AUTH),y)
|
||||
branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all
|
||||
branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pac-ret+leaf
|
||||
|
|
@ -73,9 +77,10 @@ branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pa
|
|||
# we pass it only to the assembler. This option is utilized only in case of non
|
||||
# integrated assemblers.
|
||||
branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a
|
||||
KBUILD_CFLAGS += $(branch-prot-flags-y)
|
||||
endif
|
||||
|
||||
KBUILD_CFLAGS += $(branch-prot-flags-y)
|
||||
|
||||
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
|
||||
KBUILD_CPPFLAGS += -mbig-endian
|
||||
CHECKFLAGS += -D__AARCH64EB__
|
||||
|
|
|
|||
|
|
@ -120,22 +120,12 @@
|
|||
|
||||
/*
|
||||
* Alignment of kernel segments (e.g. .text, .data).
|
||||
*/
|
||||
#if defined(CONFIG_DEBUG_ALIGN_RODATA)
|
||||
/*
|
||||
* 4 KB granule: 1 level 2 entry
|
||||
* 16 KB granule: 128 level 3 entries, with contiguous bit
|
||||
* 64 KB granule: 32 level 3 entries, with contiguous bit
|
||||
*/
|
||||
#define SEGMENT_ALIGN SZ_2M
|
||||
#else
|
||||
/*
|
||||
*
|
||||
* 4 KB granule: 16 level 3 entries, with contiguous bit
|
||||
* 16 KB granule: 4 level 3 entries, without contiguous bit
|
||||
* 64 KB granule: 1 level 3 entry
|
||||
*/
|
||||
#define SEGMENT_ALIGN SZ_64K
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Memory types available.
|
||||
|
|
|
|||
|
|
@ -601,7 +601,7 @@ static struct undef_hook setend_hooks[] = {
|
|||
},
|
||||
{
|
||||
/* Thumb mode */
|
||||
.instr_mask = 0x0000fff7,
|
||||
.instr_mask = 0xfffffff7,
|
||||
.instr_val = 0x0000b650,
|
||||
.pstate_mask = (PSR_AA32_T_BIT | PSR_AA32_MODE_MASK),
|
||||
.pstate_val = (PSR_AA32_T_BIT | PSR_AA32_MODE_USR),
|
||||
|
|
|
|||
|
|
@ -75,14 +75,12 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
|
|||
|
||||
if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && phys_seed != 0) {
|
||||
/*
|
||||
* If CONFIG_DEBUG_ALIGN_RODATA is not set, produce a
|
||||
* displacement in the interval [0, MIN_KIMG_ALIGN) that
|
||||
* doesn't violate this kernel's de-facto alignment
|
||||
* Produce a displacement in the interval [0, MIN_KIMG_ALIGN)
|
||||
* that doesn't violate this kernel's de-facto alignment
|
||||
* constraints.
|
||||
*/
|
||||
u32 mask = (MIN_KIMG_ALIGN - 1) & ~(EFI_KIMG_ALIGN - 1);
|
||||
u32 offset = !IS_ENABLED(CONFIG_DEBUG_ALIGN_RODATA) ?
|
||||
(phys_seed >> 32) & mask : TEXT_OFFSET;
|
||||
u32 offset = (phys_seed >> 32) & mask;
|
||||
|
||||
/*
|
||||
* With CONFIG_RANDOMIZE_TEXT_OFFSET=y, TEXT_OFFSET may not
|
||||
|
|
|
|||
|
|
@ -16,6 +16,10 @@ config GCC_VERSION
|
|||
default $(shell,$(srctree)/scripts/gcc-version.sh $(CC)) if CC_IS_GCC
|
||||
default 0
|
||||
|
||||
config LD_VERSION
|
||||
int
|
||||
default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh)
|
||||
|
||||
config CC_IS_CLANG
|
||||
def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue