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powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C
The OPAL call wrapper gets interrupt disabling wrong. It disables interrupts just by clearing MSR[EE], which has two problems: - It doesn't call into the IRQ tracing subsystem, which means tracing across OPAL calls does not always notice IRQs have been disabled. - It doesn't go through the IRQ soft-mask code, which causes a minor bug. MSR[EE] can not be restored by saving the MSR then clearing MSR[EE], because a racing interrupt while soft-masked could clear MSR[EE] between the two steps. This can cause MSR[EE] to be incorrectly enabled when the OPAL call returns. Fortunately that should only result in another masked interrupt being taken to disable MSR[EE] again, but it's a bit sloppy. The existing code also saves MSR to PACA, which is not re-entrant if there is a nested OPAL call from different MSR contexts, which can happen these days with SRESET interrupts on bare metal. To fix these issues, move the tracing and IRQ handling code to C, and call into asm just for the low level call when everything is ready to go. Save the MSR on stack rather than PACA. Performance cost is kept to a minimum with a few optimisations: - The endian switch upon return is combined with the MSR restore, which avoids an expensive context synchronizing operation for LE kernels. This makes up for the additional mtmsrd to enable interrupts with local_irq_enable(). - blr is now used to return from the opal_* functions that are called as C functions, to avoid link stack corruption. This requires a skiboot fix as well to keep the call stack balanced. A NULL call is more costly after this, (410ns->430ns on POWER9), but OPAL calls are generally not performance critical at this scale. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
Michael Ellerman
parent
38555434a9
commit
75d9fc7fd9
@ -37,13 +37,11 @@ void kexec_copy_flush(struct kimage *image);
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extern struct static_key hcall_tracepoint_key;
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void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
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void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
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/* OPAL tracing */
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#ifdef CONFIG_JUMP_LABEL
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extern struct static_key opal_tracepoint_key;
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#endif
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void __trace_opal_entry(unsigned long opcode, unsigned long *args);
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void __trace_opal_exit(long opcode, unsigned long retval);
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/* OPAL */
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int64_t __opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3,
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int64_t a4, int64_t a5, int64_t a6, int64_t a7,
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int64_t opcode, uint64_t msr);
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/* VMX copying */
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int enter_vmx_usercopy(void);
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@ -1,6 +1,6 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-y += setup.o opal-wrappers.o opal.o opal-async.o idle.o
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obj-y += opal-rtc.o opal-nvram.o opal-lpc.o opal-flash.o
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obj-y += setup.o opal-call.o opal-wrappers.o opal.o opal-async.o
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obj-y += idle.o opal-rtc.o opal-nvram.o opal-lpc.o opal-flash.o
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obj-y += rng.o opal-elog.o opal-dump.o opal-sysparam.o opal-sensor.o
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obj-y += opal-msglog.o opal-hmi.o opal-power.o opal-irqchip.o
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obj-y += opal-kmsg.o opal-powercap.o opal-psr.o opal-sensor-groups.o
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@ -11,7 +11,6 @@ obj-$(CONFIG_CXL_BASE) += pci-cxl.o
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obj-$(CONFIG_EEH) += eeh-powernv.o
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obj-$(CONFIG_PPC_SCOM) += opal-xscom.o
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obj-$(CONFIG_MEMORY_FAILURE) += opal-memory-errors.o
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obj-$(CONFIG_TRACEPOINTS) += opal-tracepoints.o
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obj-$(CONFIG_OPAL_PRD) += opal-prd.o
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obj-$(CONFIG_PERF_EVENTS) += opal-imc.o
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obj-$(CONFIG_PPC_MEMTRACE) += memtrace.o
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283
arch/powerpc/platforms/powernv/opal-call.c
Normal file
283
arch/powerpc/platforms/powernv/opal-call.c
Normal file
@ -0,0 +1,283 @@
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/percpu.h>
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#include <linux/jump_label.h>
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#include <asm/opal-api.h>
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#include <asm/trace.h>
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#include <asm/asm-prototypes.h>
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#ifdef CONFIG_TRACEPOINTS
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/*
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* Since the tracing code might execute OPAL calls we need to guard against
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* recursion.
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*/
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static DEFINE_PER_CPU(unsigned int, opal_trace_depth);
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static void __trace_opal_entry(s64 a0, s64 a1, s64 a2, s64 a3,
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s64 a4, s64 a5, s64 a6, s64 a7,
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unsigned long opcode)
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{
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unsigned int *depth;
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unsigned long args[8];
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depth = this_cpu_ptr(&opal_trace_depth);
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if (*depth)
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return;
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args[0] = a0;
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args[1] = a1;
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args[2] = a2;
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args[3] = a3;
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args[4] = a4;
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args[5] = a5;
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args[6] = a6;
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args[7] = a7;
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(*depth)++;
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trace_opal_entry(opcode, &args[0]);
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(*depth)--;
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}
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static void __trace_opal_exit(unsigned long opcode, unsigned long retval)
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{
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unsigned int *depth;
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depth = this_cpu_ptr(&opal_trace_depth);
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if (*depth)
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return;
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(*depth)++;
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trace_opal_exit(opcode, retval);
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(*depth)--;
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}
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static DEFINE_STATIC_KEY_FALSE(opal_tracepoint_key);
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int opal_tracepoint_regfunc(void)
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{
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static_branch_inc(&opal_tracepoint_key);
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return 0;
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}
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void opal_tracepoint_unregfunc(void)
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{
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static_branch_dec(&opal_tracepoint_key);
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}
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static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3,
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s64 a4, s64 a5, s64 a6, s64 a7,
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unsigned long opcode, unsigned long msr)
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{
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s64 ret;
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__trace_opal_entry(a0, a1, a2, a3, a4, a5, a6, a7, opcode);
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ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
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__trace_opal_exit(opcode, ret);
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return ret;
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}
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#define DO_TRACE (static_branch_unlikely(&opal_tracepoint_key))
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#else /* CONFIG_TRACEPOINTS */
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static s64 __opal_call_trace(s64 a0, s64 a1, s64 a2, s64 a3,
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s64 a4, s64 a5, s64 a6, s64 a7,
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unsigned long opcode, unsigned long msr)
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{
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}
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#define DO_TRACE false
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#endif /* CONFIG_TRACEPOINTS */
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static int64_t opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3,
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int64_t a4, int64_t a5, int64_t a6, int64_t a7, int64_t opcode)
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{
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unsigned long flags;
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unsigned long msr = mfmsr();
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bool mmu = (msr & (MSR_IR|MSR_DR));
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int64_t ret;
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msr &= ~MSR_EE;
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if (unlikely(!mmu))
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return __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
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local_save_flags(flags);
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hard_irq_disable();
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if (DO_TRACE) {
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ret = __opal_call_trace(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
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} else {
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ret = __opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode, msr);
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}
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local_irq_restore(flags);
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return ret;
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}
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#define OPAL_CALL(name, opcode) \
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int64_t name(int64_t a0, int64_t a1, int64_t a2, int64_t a3, \
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int64_t a4, int64_t a5, int64_t a6, int64_t a7) \
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{ \
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return opal_call(a0, a1, a2, a3, a4, a5, a6, a7, opcode); \
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}
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OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL);
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OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE);
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OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ);
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OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE);
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OPAL_CALL(opal_rtc_read, OPAL_RTC_READ);
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OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE);
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OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN);
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OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT);
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OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2);
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OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM);
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OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM);
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OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT);
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OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS);
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OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY);
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OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY);
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OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE);
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OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD);
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OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD);
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OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE);
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OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD);
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OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD);
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OPAL_CALL(opal_set_xive, OPAL_SET_XIVE);
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OPAL_CALL(opal_get_xive, OPAL_GET_XIVE);
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OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER);
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OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS);
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OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR);
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OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET);
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OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT);
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OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC);
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OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE);
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OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW);
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OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW);
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OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY);
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OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE);
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OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV);
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OPAL_CALL(opal_pci_set_mve, OPAL_PCI_SET_MVE);
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OPAL_CALL(opal_pci_set_mve_enable, OPAL_PCI_SET_MVE_ENABLE);
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OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE);
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OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE);
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OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE);
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OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE);
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OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32);
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OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64);
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OPAL_CALL(opal_start_cpu, OPAL_START_CPU);
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OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS);
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OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL);
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OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW);
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OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
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OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET);
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OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA);
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OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA);
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OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB);
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OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT);
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OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR);
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OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS);
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OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS);
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OPAL_CALL(opal_get_dpo_status, OPAL_GET_DPO_STATUS);
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OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED);
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OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR);
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OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL);
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OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI);
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OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2);
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OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ);
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OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE);
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OPAL_CALL(opal_lpc_read, OPAL_LPC_READ);
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OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE);
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OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU);
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OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS);
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OPAL_CALL(opal_read_elog, OPAL_ELOG_READ);
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OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK);
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OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE);
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OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND);
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OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE);
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OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE);
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OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE);
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OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE);
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OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE);
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OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN);
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OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT);
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OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO);
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OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2);
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OPAL_CALL(opal_dump_read, OPAL_DUMP_READ);
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OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK);
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OPAL_CALL(opal_get_msg, OPAL_GET_MSG);
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OPAL_CALL(opal_write_oppanel_async, OPAL_WRITE_OPPANEL_ASYNC);
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OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION);
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OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND);
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OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT);
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OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ);
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OPAL_CALL(opal_get_param, OPAL_GET_PARAM);
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OPAL_CALL(opal_set_param, OPAL_SET_PARAM);
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OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI);
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OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE);
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OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG);
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OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION);
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OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION);
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OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE);
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OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO);
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OPAL_CALL(opal_tpo_read, OPAL_READ_TPO);
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OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND);
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OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV);
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OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST);
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OPAL_CALL(opal_flash_read, OPAL_FLASH_READ);
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OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE);
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OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE);
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OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG);
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OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR);
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OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR);
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OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH);
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OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE);
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OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE);
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OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE);
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OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE);
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OPAL_CALL(opal_int_get_xirr, OPAL_INT_GET_XIRR);
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OPAL_CALL(opal_int_set_cppr, OPAL_INT_SET_CPPR);
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OPAL_CALL(opal_int_eoi, OPAL_INT_EOI);
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OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR);
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OPAL_CALL(opal_pci_tce_kill, OPAL_PCI_TCE_KILL);
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OPAL_CALL(opal_nmmu_set_ptcr, OPAL_NMMU_SET_PTCR);
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OPAL_CALL(opal_xive_reset, OPAL_XIVE_RESET);
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OPAL_CALL(opal_xive_get_irq_info, OPAL_XIVE_GET_IRQ_INFO);
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OPAL_CALL(opal_xive_get_irq_config, OPAL_XIVE_GET_IRQ_CONFIG);
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OPAL_CALL(opal_xive_set_irq_config, OPAL_XIVE_SET_IRQ_CONFIG);
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OPAL_CALL(opal_xive_get_queue_info, OPAL_XIVE_GET_QUEUE_INFO);
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OPAL_CALL(opal_xive_set_queue_info, OPAL_XIVE_SET_QUEUE_INFO);
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OPAL_CALL(opal_xive_donate_page, OPAL_XIVE_DONATE_PAGE);
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OPAL_CALL(opal_xive_alloc_vp_block, OPAL_XIVE_ALLOCATE_VP_BLOCK);
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OPAL_CALL(opal_xive_free_vp_block, OPAL_XIVE_FREE_VP_BLOCK);
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OPAL_CALL(opal_xive_allocate_irq, OPAL_XIVE_ALLOCATE_IRQ);
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OPAL_CALL(opal_xive_free_irq, OPAL_XIVE_FREE_IRQ);
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OPAL_CALL(opal_xive_get_vp_info, OPAL_XIVE_GET_VP_INFO);
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OPAL_CALL(opal_xive_set_vp_info, OPAL_XIVE_SET_VP_INFO);
|
||||
OPAL_CALL(opal_xive_sync, OPAL_XIVE_SYNC);
|
||||
OPAL_CALL(opal_xive_dump, OPAL_XIVE_DUMP);
|
||||
OPAL_CALL(opal_signal_system_reset, OPAL_SIGNAL_SYSTEM_RESET);
|
||||
OPAL_CALL(opal_npu_init_context, OPAL_NPU_INIT_CONTEXT);
|
||||
OPAL_CALL(opal_npu_destroy_context, OPAL_NPU_DESTROY_CONTEXT);
|
||||
OPAL_CALL(opal_npu_map_lpar, OPAL_NPU_MAP_LPAR);
|
||||
OPAL_CALL(opal_imc_counters_init, OPAL_IMC_COUNTERS_INIT);
|
||||
OPAL_CALL(opal_imc_counters_start, OPAL_IMC_COUNTERS_START);
|
||||
OPAL_CALL(opal_imc_counters_stop, OPAL_IMC_COUNTERS_STOP);
|
||||
OPAL_CALL(opal_pci_set_p2p, OPAL_PCI_SET_P2P);
|
||||
OPAL_CALL(opal_get_powercap, OPAL_GET_POWERCAP);
|
||||
OPAL_CALL(opal_set_powercap, OPAL_SET_POWERCAP);
|
||||
OPAL_CALL(opal_get_power_shift_ratio, OPAL_GET_POWER_SHIFT_RATIO);
|
||||
OPAL_CALL(opal_set_power_shift_ratio, OPAL_SET_POWER_SHIFT_RATIO);
|
||||
OPAL_CALL(opal_sensor_group_clear, OPAL_SENSOR_GROUP_CLEAR);
|
||||
OPAL_CALL(opal_quiesce, OPAL_QUIESCE);
|
||||
OPAL_CALL(opal_npu_spa_setup, OPAL_NPU_SPA_SETUP);
|
||||
OPAL_CALL(opal_npu_spa_clear_cache, OPAL_NPU_SPA_CLEAR_CACHE);
|
||||
OPAL_CALL(opal_npu_tl_set, OPAL_NPU_TL_SET);
|
||||
OPAL_CALL(opal_pci_get_pbcq_tunnel_bar, OPAL_PCI_GET_PBCQ_TUNNEL_BAR);
|
||||
OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
|
||||
OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64);
|
||||
OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE);
|
||||
OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT);
|
||||
@ -17,317 +17,51 @@
|
||||
#include <asm/asm-compat.h>
|
||||
#include <asm/feature-fixups.h>
|
||||
|
||||
.section ".text"
|
||||
|
||||
#ifdef CONFIG_TRACEPOINTS
|
||||
#ifdef CONFIG_JUMP_LABEL
|
||||
#define OPAL_BRANCH(LABEL) \
|
||||
ARCH_STATIC_BRANCH(LABEL, opal_tracepoint_key)
|
||||
#else
|
||||
|
||||
.section ".toc","aw"
|
||||
|
||||
.globl opal_tracepoint_refcount
|
||||
opal_tracepoint_refcount:
|
||||
.8byte 0
|
||||
|
||||
.section ".text"
|
||||
.section ".text"
|
||||
|
||||
/*
|
||||
* We branch around this in early init by using an unconditional cpu
|
||||
* feature.
|
||||
* r3-r10 - OPAL call arguments
|
||||
* STK_PARAM(R11) - OPAL opcode
|
||||
* STK_PARAM(R12) - MSR to restore
|
||||
*/
|
||||
#define OPAL_BRANCH(LABEL) \
|
||||
BEGIN_FTR_SECTION; \
|
||||
b 1f; \
|
||||
END_FTR_SECTION(0, 1); \
|
||||
ld r11,opal_tracepoint_refcount@toc(r2); \
|
||||
cmpdi r11,0; \
|
||||
bne- LABEL; \
|
||||
1:
|
||||
|
||||
#endif
|
||||
|
||||
#else
|
||||
#define OPAL_BRANCH(LABEL)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* DO_OPAL_CALL assumes:
|
||||
* r0 = opal call token
|
||||
* r12 = msr
|
||||
* LR has been saved
|
||||
*/
|
||||
#define DO_OPAL_CALL() \
|
||||
mfcr r11; \
|
||||
stw r11,8(r1); \
|
||||
li r11,0; \
|
||||
ori r11,r11,MSR_EE; \
|
||||
std r12,PACASAVEDMSR(r13); \
|
||||
andc r12,r12,r11; \
|
||||
mtmsrd r12,1; \
|
||||
LOAD_REG_ADDR(r11,opal_return); \
|
||||
mtlr r11; \
|
||||
li r11,MSR_DR|MSR_IR|MSR_LE;\
|
||||
andc r12,r12,r11; \
|
||||
mtspr SPRN_HSRR1,r12; \
|
||||
LOAD_REG_ADDR(r11,opal); \
|
||||
ld r12,8(r11); \
|
||||
ld r2,0(r11); \
|
||||
mtspr SPRN_HSRR0,r12; \
|
||||
_GLOBAL_TOC(__opal_call)
|
||||
mflr r0
|
||||
std r0,PPC_LR_STKOFF(r1)
|
||||
ld r12,STK_PARAM(R12)(r1)
|
||||
li r0,MSR_IR|MSR_DR|MSR_LE
|
||||
andc r12,r12,r0
|
||||
LOAD_REG_ADDR(r11, opal_return)
|
||||
mtlr r11
|
||||
LOAD_REG_ADDR(r11, opal)
|
||||
ld r2,0(r11)
|
||||
ld r11,8(r11)
|
||||
mtspr SPRN_HSRR0,r11
|
||||
mtspr SPRN_HSRR1,r12
|
||||
/* set token to r0 */
|
||||
ld r0,STK_PARAM(R11)(r1)
|
||||
hrfid
|
||||
|
||||
#define OPAL_CALL(name, token) \
|
||||
_GLOBAL_TOC(name); \
|
||||
mfmsr r12; \
|
||||
mflr r0; \
|
||||
andi. r11,r12,MSR_IR|MSR_DR; \
|
||||
std r0,PPC_LR_STKOFF(r1); \
|
||||
li r0,token; \
|
||||
beq opal_real_call; \
|
||||
OPAL_BRANCH(opal_tracepoint_entry) \
|
||||
DO_OPAL_CALL()
|
||||
|
||||
|
||||
opal_return:
|
||||
/*
|
||||
* Fixup endian on OPAL return... we should be able to simplify
|
||||
* this by instead converting the below trampoline to a set of
|
||||
* bytes (always BE) since MSR:LE will end up fixed up as a side
|
||||
* effect of the rfid.
|
||||
* Restore MSR on OPAL return. The MSR is set to big-endian.
|
||||
*/
|
||||
FIXUP_ENDIAN_HV
|
||||
ld r2,PACATOC(r13);
|
||||
lwz r4,8(r1);
|
||||
ld r5,PPC_LR_STKOFF(r1);
|
||||
ld r6,PACASAVEDMSR(r13);
|
||||
mtcr r4;
|
||||
mtspr SPRN_HSRR0,r5;
|
||||
mtspr SPRN_HSRR1,r6;
|
||||
hrfid
|
||||
#ifdef __BIG_ENDIAN__
|
||||
ld r11,STK_PARAM(R12)(r1)
|
||||
mtmsrd r11
|
||||
#else
|
||||
/* Endian can only be switched with rfi, must byte reverse MSR load */
|
||||
.short 0x4039 /* li r10,STK_PARAM(R12) */
|
||||
.byte (STK_PARAM(R12) >> 8) & 0xff
|
||||
.byte STK_PARAM(R12) & 0xff
|
||||
|
||||
opal_real_call:
|
||||
mfcr r11
|
||||
stw r11,8(r1)
|
||||
/* Set opal return address */
|
||||
LOAD_REG_ADDR(r11, opal_return_realmode)
|
||||
mtlr r11
|
||||
li r11,MSR_LE
|
||||
andc r12,r12,r11
|
||||
mtspr SPRN_HSRR1,r12
|
||||
LOAD_REG_ADDR(r11,opal)
|
||||
ld r12,8(r11)
|
||||
ld r2,0(r11)
|
||||
mtspr SPRN_HSRR0,r12
|
||||
hrfid
|
||||
|
||||
opal_return_realmode:
|
||||
FIXUP_ENDIAN_HV
|
||||
ld r2,PACATOC(r13);
|
||||
lwz r11,8(r1);
|
||||
ld r12,PPC_LR_STKOFF(r1)
|
||||
mtcr r11;
|
||||
mtlr r12
|
||||
blr
|
||||
|
||||
#ifdef CONFIG_TRACEPOINTS
|
||||
opal_tracepoint_entry:
|
||||
stdu r1,-STACKFRAMESIZE(r1)
|
||||
std r0,STK_REG(R23)(r1)
|
||||
std r3,STK_REG(R24)(r1)
|
||||
std r4,STK_REG(R25)(r1)
|
||||
std r5,STK_REG(R26)(r1)
|
||||
std r6,STK_REG(R27)(r1)
|
||||
std r7,STK_REG(R28)(r1)
|
||||
std r8,STK_REG(R29)(r1)
|
||||
std r9,STK_REG(R30)(r1)
|
||||
std r10,STK_REG(R31)(r1)
|
||||
mr r3,r0
|
||||
addi r4,r1,STK_REG(R24)
|
||||
bl __trace_opal_entry
|
||||
ld r0,STK_REG(R23)(r1)
|
||||
ld r3,STK_REG(R24)(r1)
|
||||
ld r4,STK_REG(R25)(r1)
|
||||
ld r5,STK_REG(R26)(r1)
|
||||
ld r6,STK_REG(R27)(r1)
|
||||
ld r7,STK_REG(R28)(r1)
|
||||
ld r8,STK_REG(R29)(r1)
|
||||
ld r9,STK_REG(R30)(r1)
|
||||
ld r10,STK_REG(R31)(r1)
|
||||
|
||||
/* setup LR so we return via tracepoint_return */
|
||||
LOAD_REG_ADDR(r11,opal_tracepoint_return)
|
||||
std r11,16(r1)
|
||||
|
||||
mfmsr r12
|
||||
DO_OPAL_CALL()
|
||||
|
||||
opal_tracepoint_return:
|
||||
std r3,STK_REG(R31)(r1)
|
||||
mr r4,r3
|
||||
ld r3,STK_REG(R23)(r1)
|
||||
bl __trace_opal_exit
|
||||
ld r3,STK_REG(R31)(r1)
|
||||
addi r1,r1,STACKFRAMESIZE
|
||||
ld r0,16(r1)
|
||||
.long 0x280c6a7d /* ldbrx r11,r10,r1 */
|
||||
.long 0x05009f42 /* bcl 20,31,$+4 */
|
||||
.long 0xa602487d /* mflr r10 */
|
||||
.long 0x14004a39 /* addi r10,r10,20 */
|
||||
.long 0xa64b5a7d /* mthsrr0 r10 */
|
||||
.long 0xa64b7b7d /* mthsrr1 r11 */
|
||||
.long 0x2402004c /* hrfid */
|
||||
#endif
|
||||
ld r2,PACATOC(r13)
|
||||
ld r0,PPC_LR_STKOFF(r1)
|
||||
mtlr r0
|
||||
blr
|
||||
#endif
|
||||
|
||||
|
||||
OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL);
|
||||
OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE);
|
||||
OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ);
|
||||
OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE);
|
||||
OPAL_CALL(opal_rtc_read, OPAL_RTC_READ);
|
||||
OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE);
|
||||
OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN);
|
||||
OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT);
|
||||
OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2);
|
||||
OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM);
|
||||
OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM);
|
||||
OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT);
|
||||
OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS);
|
||||
OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY);
|
||||
OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY);
|
||||
OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE);
|
||||
OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD);
|
||||
OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD);
|
||||
OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE);
|
||||
OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD);
|
||||
OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD);
|
||||
OPAL_CALL(opal_set_xive, OPAL_SET_XIVE);
|
||||
OPAL_CALL(opal_get_xive, OPAL_GET_XIVE);
|
||||
OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER);
|
||||
OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS);
|
||||
OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR);
|
||||
OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET);
|
||||
OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT);
|
||||
OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC);
|
||||
OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE);
|
||||
OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW);
|
||||
OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW);
|
||||
OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY);
|
||||
OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE);
|
||||
OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV);
|
||||
OPAL_CALL(opal_pci_set_mve, OPAL_PCI_SET_MVE);
|
||||
OPAL_CALL(opal_pci_set_mve_enable, OPAL_PCI_SET_MVE_ENABLE);
|
||||
OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE);
|
||||
OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE);
|
||||
OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE);
|
||||
OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE);
|
||||
OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32);
|
||||
OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64);
|
||||
OPAL_CALL(opal_start_cpu, OPAL_START_CPU);
|
||||
OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS);
|
||||
OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL);
|
||||
OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW);
|
||||
OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
|
||||
OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET);
|
||||
OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA);
|
||||
OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA);
|
||||
OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB);
|
||||
OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT);
|
||||
OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR);
|
||||
OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS);
|
||||
OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS);
|
||||
OPAL_CALL(opal_get_dpo_status, OPAL_GET_DPO_STATUS);
|
||||
OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED);
|
||||
OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR);
|
||||
OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL);
|
||||
OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI);
|
||||
OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2);
|
||||
OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ);
|
||||
OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE);
|
||||
OPAL_CALL(opal_lpc_read, OPAL_LPC_READ);
|
||||
OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE);
|
||||
OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU);
|
||||
OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS);
|
||||
OPAL_CALL(opal_read_elog, OPAL_ELOG_READ);
|
||||
OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK);
|
||||
OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE);
|
||||
OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND);
|
||||
OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE);
|
||||
OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE);
|
||||
OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE);
|
||||
OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE);
|
||||
OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE);
|
||||
OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN);
|
||||
OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT);
|
||||
OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO);
|
||||
OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2);
|
||||
OPAL_CALL(opal_dump_read, OPAL_DUMP_READ);
|
||||
OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK);
|
||||
OPAL_CALL(opal_get_msg, OPAL_GET_MSG);
|
||||
OPAL_CALL(opal_write_oppanel_async, OPAL_WRITE_OPPANEL_ASYNC);
|
||||
OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION);
|
||||
OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND);
|
||||
OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT);
|
||||
OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ);
|
||||
OPAL_CALL(opal_get_param, OPAL_GET_PARAM);
|
||||
OPAL_CALL(opal_set_param, OPAL_SET_PARAM);
|
||||
OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI);
|
||||
OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE);
|
||||
OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG);
|
||||
OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION);
|
||||
OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION);
|
||||
OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE);
|
||||
OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO);
|
||||
OPAL_CALL(opal_tpo_read, OPAL_READ_TPO);
|
||||
OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND);
|
||||
OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV);
|
||||
OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST);
|
||||
OPAL_CALL(opal_flash_read, OPAL_FLASH_READ);
|
||||
OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE);
|
||||
OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE);
|
||||
OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG);
|
||||
OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR);
|
||||
OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR);
|
||||
OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH);
|
||||
OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE);
|
||||
OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE);
|
||||
OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE);
|
||||
OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE);
|
||||
OPAL_CALL(opal_int_get_xirr, OPAL_INT_GET_XIRR);
|
||||
OPAL_CALL(opal_int_set_cppr, OPAL_INT_SET_CPPR);
|
||||
OPAL_CALL(opal_int_eoi, OPAL_INT_EOI);
|
||||
OPAL_CALL(opal_int_set_mfrr, OPAL_INT_SET_MFRR);
|
||||
OPAL_CALL(opal_pci_tce_kill, OPAL_PCI_TCE_KILL);
|
||||
OPAL_CALL(opal_nmmu_set_ptcr, OPAL_NMMU_SET_PTCR);
|
||||
OPAL_CALL(opal_xive_reset, OPAL_XIVE_RESET);
|
||||
OPAL_CALL(opal_xive_get_irq_info, OPAL_XIVE_GET_IRQ_INFO);
|
||||
OPAL_CALL(opal_xive_get_irq_config, OPAL_XIVE_GET_IRQ_CONFIG);
|
||||
OPAL_CALL(opal_xive_set_irq_config, OPAL_XIVE_SET_IRQ_CONFIG);
|
||||
OPAL_CALL(opal_xive_get_queue_info, OPAL_XIVE_GET_QUEUE_INFO);
|
||||
OPAL_CALL(opal_xive_set_queue_info, OPAL_XIVE_SET_QUEUE_INFO);
|
||||
OPAL_CALL(opal_xive_donate_page, OPAL_XIVE_DONATE_PAGE);
|
||||
OPAL_CALL(opal_xive_alloc_vp_block, OPAL_XIVE_ALLOCATE_VP_BLOCK);
|
||||
OPAL_CALL(opal_xive_free_vp_block, OPAL_XIVE_FREE_VP_BLOCK);
|
||||
OPAL_CALL(opal_xive_allocate_irq, OPAL_XIVE_ALLOCATE_IRQ);
|
||||
OPAL_CALL(opal_xive_free_irq, OPAL_XIVE_FREE_IRQ);
|
||||
OPAL_CALL(opal_xive_get_vp_info, OPAL_XIVE_GET_VP_INFO);
|
||||
OPAL_CALL(opal_xive_set_vp_info, OPAL_XIVE_SET_VP_INFO);
|
||||
OPAL_CALL(opal_xive_sync, OPAL_XIVE_SYNC);
|
||||
OPAL_CALL(opal_xive_dump, OPAL_XIVE_DUMP);
|
||||
OPAL_CALL(opal_signal_system_reset, OPAL_SIGNAL_SYSTEM_RESET);
|
||||
OPAL_CALL(opal_npu_init_context, OPAL_NPU_INIT_CONTEXT);
|
||||
OPAL_CALL(opal_npu_destroy_context, OPAL_NPU_DESTROY_CONTEXT);
|
||||
OPAL_CALL(opal_npu_map_lpar, OPAL_NPU_MAP_LPAR);
|
||||
OPAL_CALL(opal_imc_counters_init, OPAL_IMC_COUNTERS_INIT);
|
||||
OPAL_CALL(opal_imc_counters_start, OPAL_IMC_COUNTERS_START);
|
||||
OPAL_CALL(opal_imc_counters_stop, OPAL_IMC_COUNTERS_STOP);
|
||||
OPAL_CALL(opal_pci_set_p2p, OPAL_PCI_SET_P2P);
|
||||
OPAL_CALL(opal_get_powercap, OPAL_GET_POWERCAP);
|
||||
OPAL_CALL(opal_set_powercap, OPAL_SET_POWERCAP);
|
||||
OPAL_CALL(opal_get_power_shift_ratio, OPAL_GET_POWER_SHIFT_RATIO);
|
||||
OPAL_CALL(opal_set_power_shift_ratio, OPAL_SET_POWER_SHIFT_RATIO);
|
||||
OPAL_CALL(opal_sensor_group_clear, OPAL_SENSOR_GROUP_CLEAR);
|
||||
OPAL_CALL(opal_quiesce, OPAL_QUIESCE);
|
||||
OPAL_CALL(opal_npu_spa_setup, OPAL_NPU_SPA_SETUP);
|
||||
OPAL_CALL(opal_npu_spa_clear_cache, OPAL_NPU_SPA_CLEAR_CACHE);
|
||||
OPAL_CALL(opal_npu_tl_set, OPAL_NPU_TL_SET);
|
||||
OPAL_CALL(opal_pci_get_pbcq_tunnel_bar, OPAL_PCI_GET_PBCQ_TUNNEL_BAR);
|
||||
OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
|
||||
OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64);
|
||||
OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE);
|
||||
OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user