Differential D13812 Diff 37867 head/sys/arm64/arm64/cpu_errata.c

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head/sys/arm64/arm64/cpu_errata.c

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	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.			* SUCH DAMAGE.
	*/			*/

				#include "opt_platform.h"

	#include <sys/cdefs.h>			#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");			__FBSDID("$FreeBSD$");

	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/kernel.h>			#include <sys/kernel.h>
	#include <sys/pcpu.h>			#include <sys/pcpu.h>

	#include <machine/cpu.h>			#include <machine/cpu.h>

				#ifdef DEV_PSCI
				#include <dev/psci/psci.h>
				#endif

	typedef void (cpu_quirk_install)(void);			typedef void (cpu_quirk_install)(void);
	struct cpu_quirks {			struct cpu_quirks {
	cpu_quirk_install *quirk_install;			cpu_quirk_install *quirk_install;
	u_int midr_mask;			u_int midr_mask;
	u_int midr_value;			u_int midr_value;
	};			};

	static cpu_quirk_install install_psci_bp_hardening;			static cpu_quirk_install install_psci_bp_hardening;

	static struct cpu_quirks cpu_quirks[] = {			static struct cpu_quirks cpu_quirks[] = {
				{
				.midr_mask = CPU_IMPL_MASK \| CPU_PART_MASK,
				.midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A57,0,0),
				.quirk_install = install_psci_bp_hardening,
				},
				{
				.midr_mask = CPU_IMPL_MASK \| CPU_PART_MASK,
				.midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A72,0,0),
				.quirk_install = install_psci_bp_hardening,
				},
				{
				.midr_mask = CPU_IMPL_MASK \| CPU_PART_MASK,
				.midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A73,0,0),
				.quirk_install = install_psci_bp_hardening,
				},
				{
				.midr_mask = CPU_IMPL_MASK \| CPU_PART_MASK,
				.midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A75,0,0),
				.quirk_install = install_psci_bp_hardening,
				},
	};			};

				static void
				install_psci_bp_hardening(void)
				{

				#ifdef DEV_PSCI
				PCPU_SET(bp_harden, psci_get_version);
				#endif
				}

	void			void
	install_cpu_errata(void)			install_cpu_errata(void)
	{			{
	u_int midr;			u_int midr;
	size_t i;			size_t i;

	midr = get_midr();			midr = get_midr();

	for (i = 0; i < nitems(cpu_quirks); i++) {			for (i = 0; i < nitems(cpu_quirks); i++) {
	if ((midr & cpu_quirks[i].midr_mask) ==			if ((midr & cpu_quirks[i].midr_mask) ==
	cpu_quirks[i].midr_value) {			cpu_quirks[i].midr_value) {
	cpu_quirks[i].quirk_install();			cpu_quirks[i].quirk_install();
	}			}
	}			}
	}			}