amd-iommu: print ivmd information to dmesg when requested

Add information about device memory mapping requirements for the IOMMU
as described in the IVRS ACPI table to the kernel log if amd_iommu_dump
was specified on the kernel command line.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index fe3e6453cbf73de0bfa278c199a0d92b2906d5cf..b90a78cfdcb8e1f7eb6d93b185aa904c25cbad5f 100644 (file)
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -983,6 +983,7 @@ static int __init init_exclusion_range(struct ivmd_header *m)
 static int __init init_unity_map_range(struct ivmd_header *m)
 {
        struct unity_map_entry *e = 0;
+       char *s;
 
        e = kzalloc(sizeof(*e), GFP_KERNEL);
        if (e == NULL)
@@ -991,13 +992,16 @@ static int __init init_unity_map_range(struct ivmd_header *m)
        switch (m->type) {
        default:
        case ACPI_IVMD_TYPE:
+               s = "IVMD_TYPEi\t\t\t";
                e->devid_start = e->devid_end = m->devid;
                break;
        case ACPI_IVMD_TYPE_ALL:
+               s = "IVMD_TYPE_ALL\t\t";
                e->devid_start = 0;
                e->devid_end = amd_iommu_last_bdf;
                break;
        case ACPI_IVMD_TYPE_RANGE:
+               s = "IVMD_TYPE_RANGE\t\t";
                e->devid_start = m->devid;
                e->devid_end = m->aux;
                break;
@@ -1006,6 +1010,13 @@ static int __init init_unity_map_range(struct ivmd_header *m)
        e->address_end = e->address_start + PAGE_ALIGN(m->range_length);
        e->prot = m->flags >> 1;
 
+       DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x"
+                   " range_start: %016llx range_end: %016llx flags: %x\n", s,
+                   PCI_BUS(e->devid_start), PCI_SLOT(e->devid_start),
+                   PCI_FUNC(e->devid_start), PCI_BUS(e->devid_end),
+                   PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end),
+                   e->address_start, e->address_end, m->flags);
+
        list_add_tail(&e->list, &amd_iommu_unity_map);
 
        return 0;