mirror of
https://github.com/checkpoint-restore/criu
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6f61488f21
* The following files goes into the directory arch/x86/include/asm unmodified: - include/atomic.h, - include/linkage.h, - include/memcpy_64.h, - include/types.h, - include/bitops.h, - pie/parasite-head-x86-64.S, - include/processor-flags.h, - include/syscall-x86-64.def. * Changed include directives in the source files that include the headers listed above. * Modified build scripts to reflect the source moves. Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include "compiler.h"
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#include "asm/types.h"
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#include "log.h"
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#include "util.h"
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#include "asm/bitops.h"
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#include "proc_parse.h"
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#include "fpu.h"
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#include "cpu.h"
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#undef LOG_PREFIX
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#define LOG_PREFIX "cpu: "
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const char * const x86_cap_flags[NCAPINTS_BITS] = {
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[X86_FEATURE_FPU] = "fpu",
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[X86_FEATURE_FXSR] = "fxsr",
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[X86_FEATURE_XSAVE] = "xsave",
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};
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static DECLARE_BITMAP(cpu_features, NCAPINTS_BITS);
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#define cpu_has(bit) test_bit(bit, cpu_features)
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void cpu_set_feature(unsigned int feature)
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{
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if (likely(feature < NCAPINTS_BITS))
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set_bit(feature, cpu_features);
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}
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bool cpu_has_feature(unsigned int feature)
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{
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if (likely(feature < NCAPINTS_BITS))
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return cpu_has(feature);
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return false;
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}
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int cpu_init(void)
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{
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if (parse_cpuinfo_features())
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return -1;
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BUILD_BUG_ON(sizeof(struct xsave_struct) != XSAVE_SIZE);
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BUILD_BUG_ON(sizeof(struct i387_fxsave_struct) != FXSAVE_SIZE);
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/*
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* Make sure that at least FPU is onboard
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* and fxsave is supported.
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*/
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if (cpu_has(X86_FEATURE_FPU)) {
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if (!cpu_has(X86_FEATURE_FXSR)) {
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pr_err("missing support fxsave/restore insns\n");
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return -1;
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}
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}
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pr_debug("fpu:%d fxsr:%d xsave:%d\n",
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!!cpu_has(X86_FEATURE_FPU),
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!!cpu_has(X86_FEATURE_FXSR),
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!!cpu_has(X86_FEATURE_XSAVE));
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return 0;
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}
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