C++ (Cpp) unlock_fpu_owner 예제들

예제 #1

파일: signal32.c 프로젝트: 24hours/linux

static int protected_restore_fp_context32(struct sigcontext32 __user *sc,
					  unsigned used_math)
{
	int err, tmp __maybe_unused;
	bool restore_msa = cpu_has_msa && (used_math & USEDMATH_MSA);
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = restore_fp_context32(sc);
			if (restore_msa && !err) {
				enable_msa();
				err = _restore_msa_context32(sc);
			} else {
				/* signal handler may have used MSA */
				disable_msa();
			}
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_from_sigcontext32(sc);
			if (restore_msa && !err)
				err = copy_msa_from_sigcontext32(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __get_user(tmp, &sc->sc_fpregs[0]) |
			__get_user(tmp, &sc->sc_fpregs[31]) |
			__get_user(tmp, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}

예제 #2

파일: signal32.c 프로젝트: 24hours/linux

/*
 * sigcontext handlers
 */
static int protected_save_fp_context32(struct sigcontext32 __user *sc,
				       unsigned used_math)
{
	int err;
	bool save_msa = cpu_has_msa && (used_math & USEDMATH_MSA);
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = save_fp_context32(sc);
			if (save_msa && !err)
				err = _save_msa_context32(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_to_sigcontext32(sc);
			if (save_msa && !err)
				err = copy_msa_to_sigcontext32(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __put_user(0, &sc->sc_fpregs[0]) |
			__put_user(0, &sc->sc_fpregs[31]) |
			__put_user(0, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}

예제 #3

파일: signal.c 프로젝트: 0x000000FF/edison-linux

static int protected_restore_fp_context(struct sigcontext __user *sc)
{
	int err, tmp __maybe_unused;
#ifndef CONFIG_EVA
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = restore_fp_context(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_from_sigcontext(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __get_user(tmp, &sc->sc_fpregs[0]) |
			__get_user(tmp, &sc->sc_fpregs[31]) |
			__get_user(tmp, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
#else
	/*
	 * EVA does not have FPU EVA instructions so restoring fpu context
	 * directly does not work.
	 */
	lose_fpu(0);
	err = restore_fp_context(sc); /* this might fail */
#endif
	return err;
}

예제 #4

파일: signal.c 프로젝트: 0x000000FF/edison-linux

/*
 * Helper routines
 */
static int protected_save_fp_context(struct sigcontext __user *sc)
{
	int err;
#ifndef CONFIG_EVA
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = save_fp_context(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_to_sigcontext(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __put_user(0, &sc->sc_fpregs[0]) |
			__put_user(0, &sc->sc_fpregs[31]) |
			__put_user(0, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
#else
	/*
	 * EVA does not have FPU EVA instructions so saving fpu context directly
	 * does not work.
	 */
	lose_fpu(1);
	err = save_fp_context(sc); /* this might fail */
#endif
	return err;
}

예제 #5

파일: signal.c 프로젝트: 24hours/linux

static int protected_restore_fp_context(struct sigcontext __user *sc,
					unsigned used_math)
{
	int err, tmp __maybe_unused;
	bool restore_msa = cpu_has_msa && (used_math & USEDMATH_MSA);
#ifndef CONFIG_EVA
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = restore_fp_context(sc);
			if (restore_msa && !err) {
				enable_msa();
				err = _restore_msa_context(sc);
			} else {
				/* signal handler may have used MSA */
				disable_msa();
			}
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_from_sigcontext(sc);
			if (!err && (used_math & USEDMATH_MSA))
				err = copy_msa_from_sigcontext(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __get_user(tmp, &sc->sc_fpregs[0]) |
			__get_user(tmp, &sc->sc_fpregs[31]) |
			__get_user(tmp, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
#else
	/*
	 * EVA does not have FPU EVA instructions so restoring fpu context
	 * directly does not work.
	 */
	enable_msa();
	lose_fpu(0);
	err = restore_fp_context(sc); /* this might fail */
	if (restore_msa && !err)
		err = copy_msa_from_sigcontext(sc);
#endif
	return err;
}

예제 #6

파일: signal.c 프로젝트: 24hours/linux

/*
 * Helper routines
 */
static int protected_save_fp_context(struct sigcontext __user *sc,
				     unsigned used_math)
{
	int err;
	bool save_msa = cpu_has_msa && (used_math & USEDMATH_MSA);
#ifndef CONFIG_EVA
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = save_fp_context(sc);
			if (save_msa && !err)
				err = _save_msa_context(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_to_sigcontext(sc);
			if (save_msa && !err)
				err = copy_msa_to_sigcontext(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __put_user(0, &sc->sc_fpregs[0]) |
			__put_user(0, &sc->sc_fpregs[31]) |
			__put_user(0, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
#else
	/*
	 * EVA does not have FPU EVA instructions so saving fpu context directly
	 * does not work.
	 */
	disable_msa();
	lose_fpu(1);
	err = save_fp_context(sc); /* this might fail */
	if (save_msa && !err)
		err = copy_msa_to_sigcontext(sc);
#endif
	return err;
}

예제 #7

파일: signal32.c 프로젝트: CaptainThrowback/android_kernel_htc_pme

static int protected_restore_fp_context32(struct sigcontext32 __user *sc)
{
	int err, tmp __maybe_unused;
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = restore_fp_context32(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_from_sigcontext32(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __get_user(tmp, &sc->sc_fpregs[0]) |
			__get_user(tmp, &sc->sc_fpregs[31]) |
			__get_user(tmp, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}

예제 #8

파일: signal32.c 프로젝트: CaptainThrowback/android_kernel_htc_pme

/*
 * sigcontext handlers
 */
static int protected_save_fp_context32(struct sigcontext32 __user *sc)
{
	int err;
	while (1) {
		lock_fpu_owner();
		if (is_fpu_owner()) {
			err = save_fp_context32(sc);
			unlock_fpu_owner();
		} else {
			unlock_fpu_owner();
			err = copy_fp_to_sigcontext32(sc);
		}
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __put_user(0, &sc->sc_fpregs[0]) |
			__put_user(0, &sc->sc_fpregs[31]) |
			__put_user(0, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}

예제 #9

파일: signal.c 프로젝트: IgnasD/Tomato-RAF

static int protected_restore_fp_context(struct sigcontext __user *sc)
{
	int err, tmp __maybe_unused;
	while (1) {
		lock_fpu_owner();
		own_fpu_inatomic(0);
		err = restore_fp_context(sc); /* this might fail */
		unlock_fpu_owner();
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __get_user(tmp, &sc->sc_fpregs[0]) |
			__get_user(tmp, &sc->sc_fpregs[31]) |
			__get_user(tmp, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}

예제 #10

파일: signal.c 프로젝트: IgnasD/Tomato-RAF

/*
 * Helper routines
 */
static int protected_save_fp_context(struct sigcontext __user *sc)
{
	int err;
	while (1) {
		lock_fpu_owner();
		own_fpu_inatomic(1);
		err = save_fp_context(sc); /* this might fail */
		unlock_fpu_owner();
		if (likely(!err))
			break;
		/* touch the sigcontext and try again */
		err = __put_user(0, &sc->sc_fpregs[0]) |
			__put_user(0, &sc->sc_fpregs[31]) |
			__put_user(0, &sc->sc_fpc_csr);
		if (err)
			break;	/* really bad sigcontext */
	}
	return err;
}