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arm64: uapi: Use __u128 instead of __uint128_t in UAPI headers

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The arm64 UAPI exposes '__uint128_t' types in the members of
'struct user_fpsimd_state', 'struct user_pac_address_keys' and in the
signal frame via 'struct fpsimd_context'. Since the alignment of such
a type appears to be non-portable (16 bytes on arm64, 8 bytes on s390),
prefer the '__u128' typedef from uapi/linux/types.h, which makes the
alignment explicit and allows the definitions to be reused by other
host architectures.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Steffen Eiden <seiden@linux.ibm.com>
Cc: Andreas Grapentin <gra@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Martin <dave.martin@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2026-06-26 15:17:29 +01:00
parent 10a47fb673
commit d4bf9e08d4
2 changed files with 9 additions and 9 deletions
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12
arch/arm64/include/uapi/asm/ptrace.h
View File

@ -93,7 +93,7 @@ struct user_pt_regs {
};
struct user_fpsimd_state {
__uint128_t vregs[32];
__u128 vregs[32];
__u32 fpsr;
__u32 fpcr;
__u32 __reserved[2];
@ -258,14 +258,14 @@ struct user_pac_mask {
/* pointer authentication keys (NT_ARM_PACA_KEYS, NT_ARM_PACG_KEYS) */
struct user_pac_address_keys {
__uint128_t apiakey;
__uint128_t apibkey;
__uint128_t apdakey;
__uint128_t apdbkey;
__u128 apiakey;
__u128 apibkey;
__u128 apdakey;
__u128 apdbkey;
};
struct user_pac_generic_keys {
__uint128_t apgakey;
__u128 apgakey;
};
/* ZA state (NT_ARM_ZA) */

6
arch/arm64/include/uapi/asm/sigcontext.h
View File

@ -78,7 +78,7 @@ struct fpsimd_context {
struct _aarch64_ctx head;
__u32 fpsr;
__u32 fpcr;
__uint128_t vregs[32];
__u128 vregs[32];
};
/*
@ -266,8 +266,8 @@ struct gcs_context {
* - ---- -----------
* REGS the entire SVE context
*
* ZREGS __uint128_t[SVE_NUM_ZREGS][vq] all Z-registers
* ZREG __uint128_t[vq] individual Z-register Zn
* ZREGS __u128[SVE_NUM_ZREGS][vq] all Z-registers
* ZREG __u128[vq] individual Z-register Zn
*
* PREGS uint16_t[SVE_NUM_PREGS][vq] all P-registers
* PREG uint16_t[vq] individual P-register Pn