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5ff74f5f71
Drop 'inline' from all the *_mod_init_arch() functions so that the compiler will warn about any bugs where they are unused due to not being wired up properly. (There are no such bugs currently, so this just establishes a more robust convention for the future. Of course, these functions also tend to get inlined anyway, regardless of the keyword.) Link: https://lore.kernel.org/r/20250816020240.431545-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <asm/simd.h>
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#include <asm/switch_to.h>
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#include <linux/cpufeature.h>
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#include <linux/jump_label.h>
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#include <linux/preempt.h>
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#include <linux/uaccess.h>
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#define VMX_ALIGN 16
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#define VMX_ALIGN_MASK (VMX_ALIGN-1)
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#define VECTOR_BREAKPOINT 512
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_vec_crypto);
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#define crc32_le_arch crc32_le_base /* not implemented on this arch */
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#define crc32_be_arch crc32_be_base /* not implemented on this arch */
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u32 __crc32c_vpmsum(u32 crc, const u8 *p, size_t len);
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static inline u32 crc32c_arch(u32 crc, const u8 *p, size_t len)
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{
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unsigned int prealign;
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unsigned int tail;
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if (len < (VECTOR_BREAKPOINT + VMX_ALIGN) ||
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!static_branch_likely(&have_vec_crypto) ||
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unlikely(!may_use_simd()))
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return crc32c_base(crc, p, len);
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if ((unsigned long)p & VMX_ALIGN_MASK) {
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prealign = VMX_ALIGN - ((unsigned long)p & VMX_ALIGN_MASK);
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crc = crc32c_base(crc, p, prealign);
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len -= prealign;
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p += prealign;
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}
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if (len & ~VMX_ALIGN_MASK) {
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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crc = __crc32c_vpmsum(crc, p, len & ~VMX_ALIGN_MASK);
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disable_kernel_altivec();
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pagefault_enable();
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preempt_enable();
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}
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tail = len & VMX_ALIGN_MASK;
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if (tail) {
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p += len & ~VMX_ALIGN_MASK;
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crc = crc32c_base(crc, p, tail);
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}
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return crc;
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}
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#define crc32_mod_init_arch crc32_mod_init_arch
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static void crc32_mod_init_arch(void)
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{
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if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
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(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
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static_branch_enable(&have_vec_crypto);
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}
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static inline u32 crc32_optimizations_arch(void)
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{
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if (static_key_enabled(&have_vec_crypto))
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return CRC32C_OPTIMIZATION;
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return 0;
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}
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