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7e619ecc89
Currently we call el3_panic for panics from EL3 and elx_panic for panics from lower ELs. When we boot into a rich OS environment and interact with BL31 using SMC/ABI calls and we can also decide to handle any lower EL panics in EL3. Panic can occur in lower EL from rich OS or during SMC/ABI calls after context switch to EL3. But after booting into any rich OS we may land in panic either from rich OS or while servicing any SMC call, here the logic to use el3_panic or elx_panic is flawed as spsr_el3[3:0] is always EL3h and end up in elx_panic even if panic occurred from EL3 during SMC handling. We try to decouple the elx_panic usage for its intended purpose, introduce lower_el_panic which would call elx_panic, currently lower_el_panic is called from default platform_ea_handle which would be called due to panic from any of the lower ELs. Also remove the weak linkage for elx_panic and rename it to report_elx_panic which could be used with lower_el_panic. Change-Id: I268bca89c01c60520d127ef6c7ba851460edc747 Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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* Copyright (c) 2014-2023, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <drivers/console.h>
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#if RAS_EXTENSION
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#include <lib/extensions/ras.h>
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#endif
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#include <lib/xlat_tables/xlat_mmu_helpers.h>
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#include <plat/common/platform.h>
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/*
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* The following platform setup functions are weakly defined. They
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* provide typical implementations that may be re-used by multiple
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* platforms but may also be overridden by a platform if required.
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*/
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#pragma weak bl31_plat_runtime_setup
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#if SDEI_SUPPORT
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#pragma weak plat_sdei_handle_masked_trigger
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#pragma weak plat_sdei_validate_entry_point
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#endif
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#pragma weak plat_ea_handler = plat_default_ea_handler
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void bl31_plat_runtime_setup(void)
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{
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console_switch_state(CONSOLE_FLAG_RUNTIME);
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}
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/*
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* Helper function for platform_get_pos() when platform compatibility is
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* disabled. This is to enable SPDs using the older platform API to continue
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* to work.
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*/
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unsigned int platform_core_pos_helper(unsigned long mpidr)
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{
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int idx = plat_core_pos_by_mpidr(mpidr);
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assert(idx >= 0);
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return idx;
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}
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#if SDEI_SUPPORT
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/*
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* Function that handles spurious SDEI interrupts while events are masked.
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*/
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void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
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{
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WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
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}
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/*
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* Default Function to validate SDEI entry point, which returns success.
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* Platforms may override this with their own validation mechanism.
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*/
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int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
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{
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return 0;
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}
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#endif
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const char *get_el_str(unsigned int el)
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{
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if (el == MODE_EL3) {
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return "EL3";
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} else if (el == MODE_EL2) {
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return "EL2";
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}
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return "EL1";
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}
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/* Handler for External Aborts from lower EL including RAS errors */
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void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
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void *handle, uint64_t flags)
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{
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#if RAS_EXTENSION
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/* Call RAS EA handler */
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int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
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if (handled != 0)
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return;
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#endif
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unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
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ERROR_NL();
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ERROR("Unhandled External Abort received on 0x%lx from %s\n",
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read_mpidr_el1(), get_el_str(level));
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ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
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/* We reached here due to a panic from a lower EL and assuming this is the default
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* platform registered handler that we could call on a lower EL panic.
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*/
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lower_el_panic();
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}
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