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https://github.com/AsahiLinux/m1n1
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76fd226f7c
Multi-die IRQs are coded as in the ADT: die * max_irq + num Signed-off-by: Janne Grunau <j@jannau.net>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* SPDX-License-Identifier: MIT */
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#include "adt.h"
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#include "aic.h"
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#include "aic_regs.h"
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#include "hv.h"
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#include "uartproxy.h"
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#include "utils.h"
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#define IRQTRACE_IRQ BIT(0)
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static u32 trace_hw_num[AIC_MAX_DIES][AIC_MAX_HW_NUM / 32];
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static void emit_irqtrace(u16 die, u16 type, u16 num)
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{
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struct hv_evt_irqtrace evt = {
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.flags = IRQTRACE_IRQ,
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.type = type,
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.num = die * aic->max_irq + num,
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};
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hv_wdt_suspend();
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uartproxy_send_event(EVT_IRQTRACE, &evt, sizeof(evt));
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hv_wdt_resume();
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}
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static bool trace_aic_event(struct exc_info *ctx, u64 addr, u64 *val, bool write, int width)
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{
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if (!hv_pa_rw(ctx, addr, val, write, width))
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return false;
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if (addr != (aic->base + aic->regs.event) || write || width != 2) {
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return true;
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}
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u16 die = FIELD_GET(AIC_EVENT_DIE, *val);
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u16 type = FIELD_GET(AIC_EVENT_TYPE, *val);
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u16 num = FIELD_GET(AIC_EVENT_NUM, *val);
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if (die > AIC_MAX_DIES)
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return true;
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switch (type) {
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case AIC_EVENT_TYPE_HW:
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if (trace_hw_num[die][num / 32] & BIT(num & 31)) {
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emit_irqtrace(die, type, num);
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}
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break;
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default:
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// ignore
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break;
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}
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return true;
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}
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bool hv_trace_irq(u32 type, u32 num, u32 count, u32 flags)
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{
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dprintf("HV: hv_trace_irq type: %u start: %u num: %u flags: 0x%x\n", type, num, count, flags);
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if (type == AIC_EVENT_TYPE_HW) {
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u32 die = num / aic->max_irq;
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num %= AIC_MAX_HW_NUM;
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if (die >= aic->max_irq || num >= AIC_MAX_HW_NUM || count > AIC_MAX_HW_NUM - num) {
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printf("HV: invalid IRQ range: (%u, %u) for die %u\n", num, num + count, die);
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return false;
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}
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for (u32 n = num; n < num + count; n++) {
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switch (flags) {
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case IRQTRACE_IRQ:
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trace_hw_num[die][n / 32] |= BIT(n & 31);
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break;
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default:
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trace_hw_num[die][n / 32] &= ~(BIT(n & 31));
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break;
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}
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}
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} else {
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printf("HV: not handling AIC event type: 0x%02x num: %u\n", type, num);
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return false;
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}
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if (!aic) {
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printf("HV: AIC not initialized\n");
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return false;
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}
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static bool hooked = false;
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if (aic && !hooked) {
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hv_map_hook(aic->base, trace_aic_event, aic->regs.reg_size);
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hooked = true;
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}
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return true;
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}
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