Spaces:
Runtime error
Runtime error
File size: 3,981 Bytes
8df6da4 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 |
/*
* Intel IOMMU unit test.
*
* Copyright (C) 2016 Red Hat, Inc.
*
* Authors:
* Peter Xu <peterx@redhat.com>,
*
* This work is licensed under the terms of the GNU LGPL, version 2 or
* later.
*/
#include "intel-iommu.h"
#include "pci-edu.h"
#include "x86/apic.h"
#define VTD_TEST_DMAR_4B ("DMAR 4B memcpy test")
#define VTD_TEST_IR_MSI ("IR MSI")
#define VTD_TEST_IR_IOAPIC ("IR IOAPIC")
static struct pci_edu_dev edu_dev;
static void vtd_test_dmar(void)
{
struct pci_edu_dev *dev = &edu_dev;
void *page = alloc_page();
report_prefix_push("vtd_dmar");
#define DMA_TEST_WORD (0x12345678)
/* Modify the first 4 bytes of the page */
*(uint32_t *)page = DMA_TEST_WORD;
/*
* Map the newly allocated page into IOVA address 0 (size 4K)
* of the device address space. Root entry and context entry
* will be automatically created when needed.
*/
vtd_map_range(dev->pci_dev.bdf, 0, virt_to_phys(page), PAGE_SIZE);
/*
* DMA the first 4 bytes of the page to EDU device buffer
* offset 0.
*/
edu_dma(dev, 0, 4, 0, false);
/*
* DMA the first 4 bytes of EDU device buffer into the page
* with offset 4 (so it'll be using 4-7 bytes).
*/
edu_dma(dev, 4, 4, 0, true);
/*
* Check data match between 0-3 bytes and 4-7 bytes of the
* page.
*/
report(VTD_TEST_DMAR_4B, *((uint32_t *)page + 1) == DMA_TEST_WORD);
free_page(page);
report_prefix_pop();
}
static volatile bool edu_intr_recved;
static void edu_isr(isr_regs_t *regs)
{
edu_intr_recved = true;
eoi();
edu_reg_writel(&edu_dev, EDU_REG_INTR_ACK,
edu_reg_readl(&edu_dev, EDU_REG_INTR_STATUS));
}
static void vtd_test_ir(void)
{
#define VTD_TEST_VECTOR_IOAPIC (0xed)
#define VTD_TEST_VECTOR_MSI (0xee)
struct pci_edu_dev *dev = &edu_dev;
struct pci_dev *pci_dev = &dev->pci_dev;
report_prefix_push("vtd_ir");
irq_enable();
/* This will enable INTx */
pci_msi_set_enable(pci_dev, false);
vtd_setup_ioapic_irq(pci_dev, VTD_TEST_VECTOR_IOAPIC,
0, TRIGGER_EDGE);
handle_irq(VTD_TEST_VECTOR_IOAPIC, edu_isr);
edu_intr_recved = false;
wmb();
/* Manually trigger INTR */
edu_reg_writel(dev, EDU_REG_INTR_RAISE, 1);
while (!edu_intr_recved)
cpu_relax();
/* Clear INTR bits */
edu_reg_writel(dev, EDU_REG_INTR_RAISE, 0);
/* We are good as long as we reach here */
report(VTD_TEST_IR_IOAPIC, edu_intr_recved == true);
/*
* Setup EDU PCI device MSI, using interrupt remapping. By
* default, EDU device is using INTx.
*/
if (!vtd_setup_msi(pci_dev, VTD_TEST_VECTOR_MSI, 0)) {
printf("edu device does not support MSI, skip test\n");
report_skip(VTD_TEST_IR_MSI);
return;
}
handle_irq(VTD_TEST_VECTOR_MSI, edu_isr);
edu_intr_recved = false;
wmb();
/* Manually trigger INTR */
edu_reg_writel(dev, EDU_REG_INTR_RAISE, 1);
while (!edu_intr_recved)
cpu_relax();
/* We are good as long as we reach here */
report(VTD_TEST_IR_MSI, edu_intr_recved == true);
report_prefix_pop();
}
int main(int argc, char *argv[])
{
vtd_init();
report_prefix_push("vtd_init");
report("fault status check", vtd_readl(DMAR_FSTS_REG) == 0);
report("QI enablement", vtd_readl(DMAR_GSTS_REG) & VTD_GCMD_QI);
report("DMAR table setup", vtd_readl(DMAR_GSTS_REG) & VTD_GCMD_ROOT);
report("IR table setup", vtd_readl(DMAR_GSTS_REG) & VTD_GCMD_IR_TABLE);
report("DMAR enablement", vtd_readl(DMAR_GSTS_REG) & VTD_GCMD_DMAR);
report("IR enablement", vtd_readl(DMAR_GSTS_REG) & VTD_GCMD_IR);
report("DMAR support 39 bits address width",
vtd_readq(DMAR_CAP_REG) & VTD_CAP_SAGAW);
report("DMAR support huge pages", vtd_readq(DMAR_CAP_REG) & VTD_CAP_SLLPS);
report_prefix_pop();
if (!edu_init(&edu_dev)) {
printf("Please specify \"-device edu\" to do "
"further IOMMU tests.\n");
report_skip(VTD_TEST_DMAR_4B);
report_skip(VTD_TEST_IR_IOAPIC);
report_skip(VTD_TEST_IR_MSI);
} else {
printf("Found EDU device:\n");
pci_dev_print(&edu_dev.pci_dev);
vtd_test_dmar();
vtd_test_ir();
}
return report_summary();
}
|