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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
50 lines
1 KiB
C
50 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright IBM Corp. 2024
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*
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* Authors:
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* Hariharan Mari <hari55@linux.ibm.com>
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*
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* Get the facility bits with the STFLE instruction
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*/
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#ifndef SELFTEST_KVM_FACILITY_H
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#define SELFTEST_KVM_FACILITY_H
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#include <linux/bitops.h>
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/* alt_stfle_fac_list[16] + stfle_fac_list[16] */
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#define NB_STFL_DOUBLEWORDS 32
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extern uint64_t stfl_doublewords[NB_STFL_DOUBLEWORDS];
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extern bool stfle_flag;
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static inline bool test_bit_inv(unsigned long nr, const unsigned long *ptr)
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{
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return test_bit(nr ^ (BITS_PER_LONG - 1), ptr);
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}
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static inline void stfle(uint64_t *fac, unsigned int nb_doublewords)
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{
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register unsigned long r0 asm("0") = nb_doublewords - 1;
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asm volatile(" .insn s,0xb2b00000,0(%1)\n"
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: "+d" (r0)
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: "a" (fac)
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: "memory", "cc");
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}
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static inline void setup_facilities(void)
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{
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stfle(stfl_doublewords, NB_STFL_DOUBLEWORDS);
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stfle_flag = true;
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}
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static inline bool test_facility(int nr)
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{
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if (!stfle_flag)
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setup_facilities();
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return test_bit_inv(nr, stfl_doublewords);
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}
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#endif
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