cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cik_event_interrupt.c (4669B)

      1/*
      2 * Copyright 2014 Advanced Micro Devices, Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 */
     22
     23#include "kfd_priv.h"
     24#include "kfd_events.h"
     25#include "cik_int.h"
     26#include "amdgpu_amdkfd.h"
     27#include "kfd_smi_events.h"
     28
     29static bool cik_event_interrupt_isr(struct kfd_dev *dev,
     30					const uint32_t *ih_ring_entry,
     31					uint32_t *patched_ihre,
     32					bool *patched_flag)
     33{
     34	const struct cik_ih_ring_entry *ihre =
     35			(const struct cik_ih_ring_entry *)ih_ring_entry;
     36	const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
     37	unsigned int vmid;
     38	uint16_t pasid;
     39	bool ret;
     40
     41	/* This workaround is due to HW/FW limitation on Hawaii that
     42	 * VMID and PASID are not written into ih_ring_entry
     43	 */
     44	if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
     45		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
     46		dev->adev->asic_type == CHIP_HAWAII) {
     47		struct cik_ih_ring_entry *tmp_ihre =
     48			(struct cik_ih_ring_entry *)patched_ihre;
     49
     50		*patched_flag = true;
     51		*tmp_ihre = *ihre;
     52
     53		vmid = f2g->read_vmid_from_vmfault_reg(dev->adev);
     54		ret = f2g->get_atc_vmid_pasid_mapping_info(dev->adev, vmid, &pasid);
     55
     56		tmp_ihre->ring_id &= 0x000000ff;
     57		tmp_ihre->ring_id |= vmid << 8;
     58		tmp_ihre->ring_id |= pasid << 16;
     59
     60		return ret && (pasid != 0) &&
     61			vmid >= dev->vm_info.first_vmid_kfd &&
     62			vmid <= dev->vm_info.last_vmid_kfd;
     63	}
     64
     65	/* Only handle interrupts from KFD VMIDs */
     66	vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
     67	if (vmid < dev->vm_info.first_vmid_kfd ||
     68	    vmid > dev->vm_info.last_vmid_kfd)
     69		return false;
     70
     71	/* If there is no valid PASID, it's likely a firmware bug */
     72	pasid = (ihre->ring_id & 0xffff0000) >> 16;
     73	if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
     74		return false;
     75
     76	/* Interrupt types we care about: various signals and faults.
     77	 * They will be forwarded to a work queue (see below).
     78	 */
     79	return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
     80		ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
     81		ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
     82		ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
     83		((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
     84		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
     85		!amdgpu_no_queue_eviction_on_vm_fault);
     86}
     87
     88static void cik_event_interrupt_wq(struct kfd_dev *dev,
     89					const uint32_t *ih_ring_entry)
     90{
     91	const struct cik_ih_ring_entry *ihre =
     92			(const struct cik_ih_ring_entry *)ih_ring_entry;
     93	uint32_t context_id = ihre->data & 0xfffffff;
     94	unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
     95	u32 pasid = (ihre->ring_id & 0xffff0000) >> 16;
     96
     97	if (pasid == 0)
     98		return;
     99
    100	if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
    101		kfd_signal_event_interrupt(pasid, context_id, 28);
    102	else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
    103		kfd_signal_event_interrupt(pasid, context_id, 28);
    104	else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
    105		kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
    106	else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
    107		kfd_signal_hw_exception_event(pasid);
    108	else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
    109		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
    110		struct kfd_vm_fault_info info;
    111
    112		kfd_smi_event_update_vmfault(dev, pasid);
    113		kfd_dqm_evict_pasid(dev->dqm, pasid);
    114
    115		memset(&info, 0, sizeof(info));
    116		amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->adev, &info);
    117		if (!info.page_addr && !info.status)
    118			return;
    119
    120		if (info.vmid == vmid)
    121			kfd_signal_vm_fault_event(dev, pasid, &info);
    122		else
    123			kfd_signal_vm_fault_event(dev, pasid, NULL);
    124	}
    125}
    126
    127const struct kfd_event_interrupt_class event_interrupt_class_cik = {
    128	.interrupt_isr = cik_event_interrupt_isr,
    129	.interrupt_wq = cik_event_interrupt_wq,
    130};