예제 #1
0
static void user_cache_maint_handler(unsigned int esr, struct pt_regs *regs)
{
	unsigned long address;
	int rt = ESR_ELx_SYS64_ISS_RT(esr);
	int crm = (esr & ESR_ELx_SYS64_ISS_CRM_MASK) >> ESR_ELx_SYS64_ISS_CRM_SHIFT;
	int ret = 0;

	address = untagged_addr(pt_regs_read_reg(regs, rt));

	switch (crm) {
	case ESR_ELx_SYS64_ISS_CRM_DC_CVAU:	/* DC CVAU, gets promoted */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_DC_CVAC:	/* DC CVAC, gets promoted */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_DC_CVAP:	/* DC CVAP */
		__user_cache_maint("sys 3, c7, c12, 1", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_DC_CIVAC:	/* DC CIVAC */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_IC_IVAU:	/* IC IVAU */
		__user_cache_maint("ic ivau", address, ret);
		break;
	default:
		force_signal_inject(SIGILL, ILL_ILLOPC, regs->pc);
		return;
	}

	if (ret)
		arm64_notify_segfault(address);
	else
		arm64_skip_faulting_instruction(regs, AARCH64_INSN_SIZE);
}
예제 #2
0
static void user_cache_maint_handler(unsigned int esr, struct pt_regs *regs)
{
	unsigned long address;
	int rt = (esr & ESR_ELx_SYS64_ISS_RT_MASK) >> ESR_ELx_SYS64_ISS_RT_SHIFT;
	int crm = (esr & ESR_ELx_SYS64_ISS_CRM_MASK) >> ESR_ELx_SYS64_ISS_CRM_SHIFT;
	int ret = 0;

	address = (rt == 31) ? 0 : untagged_addr(regs->regs[rt]);

	switch (crm) {
	case ESR_ELx_SYS64_ISS_CRM_DC_CVAU:	/* DC CVAU, gets promoted */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_DC_CVAC:	/* DC CVAC, gets promoted */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_DC_CIVAC:	/* DC CIVAC */
		__user_cache_maint("dc civac", address, ret);
		break;
	case ESR_ELx_SYS64_ISS_CRM_IC_IVAU:	/* IC IVAU */
		__user_cache_maint("ic ivau", address, ret);
		break;
	default:
		force_signal_inject(SIGILL, ILL_ILLOPC, regs, 0);
		return;
	}

	if (ret)
		arm64_notify_segfault(regs, address);
	else
		regs->pc += 4;
}