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42398caf16
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembler code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This is bad since macros starting with two underscores are names that are reserved by the C language. It can also be very confusing for the developers when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's now standardize on the __ASSEMBLER__ macro that is provided by the compilers. This is a completely mechanical patch (done with a simple "sed -i" statement), with some manual fixups done later while rebasing the patch. Signed-off-by: Thomas Huth <thuth@redhat.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20250611140046.137739-3-thuth@redhat.com Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2024
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*/
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#ifndef __ASM_S390_MACHINE_H
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#define __ASM_S390_MACHINE_H
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#include <linux/const.h>
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#define MFEATURE_LOWCORE 0
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#define MFEATURE_PCI_MIO 1
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#define MFEATURE_SCC 2
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#define MFEATURE_TLB_GUEST 3
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#define MFEATURE_TX 4
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#define MFEATURE_ESOP 5
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#define MFEATURE_DIAG9C 6
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#define MFEATURE_VM 7
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#define MFEATURE_KVM 8
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#define MFEATURE_LPAR 9
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#define MFEATURE_DIAG288 10
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#ifndef __ASSEMBLER__
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#include <linux/bitops.h>
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#include <asm/alternative.h>
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extern unsigned long machine_features[1];
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#define MAX_MFEATURE_BIT (sizeof(machine_features) * BITS_PER_BYTE)
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static inline void __set_machine_feature(unsigned int nr, unsigned long *mfeatures)
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{
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if (nr >= MAX_MFEATURE_BIT)
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return;
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__set_bit(nr, mfeatures);
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}
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static inline void set_machine_feature(unsigned int nr)
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{
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__set_machine_feature(nr, machine_features);
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}
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static inline void __clear_machine_feature(unsigned int nr, unsigned long *mfeatures)
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{
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if (nr >= MAX_MFEATURE_BIT)
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return;
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__clear_bit(nr, mfeatures);
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}
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static inline void clear_machine_feature(unsigned int nr)
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{
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__clear_machine_feature(nr, machine_features);
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}
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static bool __test_machine_feature(unsigned int nr, unsigned long *mfeatures)
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{
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if (nr >= MAX_MFEATURE_BIT)
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return false;
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return test_bit(nr, mfeatures);
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}
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static bool test_machine_feature(unsigned int nr)
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{
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return __test_machine_feature(nr, machine_features);
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}
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static __always_inline bool __test_machine_feature_constant(unsigned int nr)
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{
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asm goto(
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ALTERNATIVE("brcl 15,%l[l_no]", "brcl 0,0", ALT_FEATURE(%[nr]))
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:
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: [nr] "i" (nr)
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:
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: l_no);
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return true;
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l_no:
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return false;
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}
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#define DEFINE_MACHINE_HAS_FEATURE(name, feature) \
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static __always_inline bool machine_has_##name(void) \
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{ \
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if (!__is_defined(__DECOMPRESSOR) && __builtin_constant_p(feature)) \
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return __test_machine_feature_constant(feature); \
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return test_machine_feature(feature); \
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}
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DEFINE_MACHINE_HAS_FEATURE(relocated_lowcore, MFEATURE_LOWCORE)
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DEFINE_MACHINE_HAS_FEATURE(scc, MFEATURE_SCC)
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DEFINE_MACHINE_HAS_FEATURE(tlb_guest, MFEATURE_TLB_GUEST)
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DEFINE_MACHINE_HAS_FEATURE(tx, MFEATURE_TX)
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DEFINE_MACHINE_HAS_FEATURE(esop, MFEATURE_ESOP)
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DEFINE_MACHINE_HAS_FEATURE(diag9c, MFEATURE_DIAG9C)
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DEFINE_MACHINE_HAS_FEATURE(vm, MFEATURE_VM)
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DEFINE_MACHINE_HAS_FEATURE(kvm, MFEATURE_KVM)
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DEFINE_MACHINE_HAS_FEATURE(lpar, MFEATURE_LPAR)
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#define machine_is_vm machine_has_vm
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#define machine_is_kvm machine_has_kvm
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#define machine_is_lpar machine_has_lpar
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#endif /* __ASSEMBLER__ */
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#endif /* __ASM_S390_MACHINE_H */
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