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authorSingh, Brijesh <brijesh.singh@amd.com>2018-10-01 19:44:43 +0000
committerMichael S. Tsirkin <mst@redhat.com>2018-11-05 13:24:02 -0500
commit135f866e609c2ddbd0f352e8e0fee8dfb5d56c3e (patch)
tree3d054240c05fc263090c4cc0c69768eb3a090a4d
parentc028818d573ab3d86ed916a70359fedb2d24a8ad (diff)
x86_iommu/amd: Add interrupt remap support when VAPIC is enabled
Emulate the interrupt remapping support when guest virtual APIC is enabled. For more information refer: IOMMU spec rev 3.0 (section 2.2.5.2) When VAPIC is enabled, it uses interrupt remapping as defined in Table 22 and Figure 17 from IOMMU spec. Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Peter Xu <peterx@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> Cc: Tom Lendacky <Thomas.Lendacky@amd.com> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r--hw/i386/amd_iommu.c69
-rw-r--r--hw/i386/amd_iommu.h36
-rw-r--r--hw/i386/trace-events2
3 files changed, 106 insertions, 1 deletions
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 8e2f13c029..353a810e6b 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -608,6 +608,7 @@ static void amdvi_handle_control_write(AMDVIState *s)
s->completion_wait_intr = !!(control & AMDVI_MMIO_CONTROL_COMWAITINTEN);
s->cmdbuf_enabled = s->enabled && !!(control &
AMDVI_MMIO_CONTROL_CMDBUFLEN);
+ s->ga_enabled = !!(control & AMDVI_MMIO_CONTROL_GAEN);
/* update the flags depending on the control register */
if (s->cmdbuf_enabled) {
@@ -1094,6 +1095,65 @@ static int amdvi_int_remap_legacy(AMDVIState *iommu,
return 0;
}
+static int amdvi_get_irte_ga(AMDVIState *s, MSIMessage *origin, uint64_t *dte,
+ struct irte_ga *irte, uint16_t devid)
+{
+ uint64_t irte_root, offset;
+
+ irte_root = dte[2] & AMDVI_IR_PHYS_ADDR_MASK;
+ offset = (origin->data & AMDVI_IRTE_OFFSET) << 4;
+ trace_amdvi_ir_irte(irte_root, offset);
+
+ if (dma_memory_read(&address_space_memory, irte_root + offset,
+ irte, sizeof(*irte))) {
+ trace_amdvi_ir_err("failed to get irte_ga");
+ return -AMDVI_IR_GET_IRTE;
+ }
+
+ trace_amdvi_ir_irte_ga_val(irte->hi.val, irte->lo.val);
+ return 0;
+}
+
+static int amdvi_int_remap_ga(AMDVIState *iommu,
+ MSIMessage *origin,
+ MSIMessage *translated,
+ uint64_t *dte,
+ X86IOMMUIrq *irq,
+ uint16_t sid)
+{
+ int ret;
+ struct irte_ga irte;
+
+ /* get interrupt remapping table */
+ ret = amdvi_get_irte_ga(iommu, origin, dte, &irte, sid);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (!irte.lo.fields_remap.valid) {
+ trace_amdvi_ir_target_abort("RemapEn is disabled");
+ return -AMDVI_IR_TARGET_ABORT;
+ }
+
+ if (irte.lo.fields_remap.guest_mode) {
+ error_report_once("guest mode is not zero");
+ return -AMDVI_IR_ERR;
+ }
+
+ if (irte.lo.fields_remap.int_type > AMDVI_IOAPIC_INT_TYPE_ARBITRATED) {
+ error_report_once("reserved int_type is set");
+ return -AMDVI_IR_ERR;
+ }
+
+ irq->delivery_mode = irte.lo.fields_remap.int_type;
+ irq->vector = irte.hi.fields.vector;
+ irq->dest_mode = irte.lo.fields_remap.dm;
+ irq->redir_hint = irte.lo.fields_remap.rq_eoi;
+ irq->dest = irte.lo.fields_remap.destination;
+
+ return 0;
+}
+
static int __amdvi_int_remap_msi(AMDVIState *iommu,
MSIMessage *origin,
MSIMessage *translated,
@@ -1101,6 +1161,7 @@ static int __amdvi_int_remap_msi(AMDVIState *iommu,
X86IOMMUIrq *irq,
uint16_t sid)
{
+ int ret;
uint8_t int_ctl;
int_ctl = (dte[2] >> AMDVI_IR_INTCTL_SHIFT) & 3;
@@ -1120,7 +1181,13 @@ static int __amdvi_int_remap_msi(AMDVIState *iommu,
return -AMDVI_IR_ERR;
}
- return amdvi_int_remap_legacy(iommu, origin, translated, dte, irq, sid);
+ if (iommu->ga_enabled) {
+ ret = amdvi_int_remap_ga(iommu, origin, translated, dte, irq, sid);
+ } else {
+ ret = amdvi_int_remap_legacy(iommu, origin, translated, dte, irq, sid);
+ }
+
+ return ret;
}
/* Interrupt remapping for MSI/MSI-X entry */
diff --git a/hw/i386/amd_iommu.h b/hw/i386/amd_iommu.h
index f73be48fca..8061e9c49c 100644
--- a/hw/i386/amd_iommu.h
+++ b/hw/i386/amd_iommu.h
@@ -103,6 +103,7 @@
#define AMDVI_MMIO_CONTROL_EVENTINTEN (1ULL << 3)
#define AMDVI_MMIO_CONTROL_COMWAITINTEN (1ULL << 4)
#define AMDVI_MMIO_CONTROL_CMDBUFLEN (1ULL << 12)
+#define AMDVI_MMIO_CONTROL_GAEN (1ULL << 17)
/* MMIO status register bits */
#define AMDVI_MMIO_STATUS_CMDBUF_RUN (1 << 4)
@@ -263,6 +264,38 @@ union irte {
} fields;
};
+/* Interrupt remapping table fields (Guest VAPIC is enabled) */
+union irte_ga_lo {
+ uint64_t val;
+
+ /* For int remapping */
+ struct {
+ uint64_t valid:1,
+ no_fault:1,
+ /* ------ */
+ int_type:3,
+ rq_eoi:1,
+ dm:1,
+ /* ------ */
+ guest_mode:1,
+ destination:8,
+ rsvd_1:48;
+ } fields_remap;
+};
+
+union irte_ga_hi {
+ uint64_t val;
+ struct {
+ uint64_t vector:8,
+ rsvd_2:56;
+ } fields;
+};
+
+struct irte_ga {
+ union irte_ga_lo lo;
+ union irte_ga_hi hi;
+};
+
#define TYPE_AMD_IOMMU_DEVICE "amd-iommu"
#define AMD_IOMMU_DEVICE(obj)\
OBJECT_CHECK(AMDVIState, (obj), TYPE_AMD_IOMMU_DEVICE)
@@ -332,6 +365,9 @@ typedef struct AMDVIState {
/* IOTLB */
GHashTable *iotlb;
+
+ /* Interrupt remapping */
+ bool ga_enabled;
} AMDVIState;
#endif
diff --git a/hw/i386/trace-events b/hw/i386/trace-events
index 98150c93db..6ac347d18c 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -113,6 +113,8 @@ amdvi_ir_intctl(uint8_t val) "int_ctl 0x%"PRIx8
amdvi_ir_target_abort(const char *str) "%s"
amdvi_ir_delivery_mode(const char *str) "%s"
amdvi_ir_generate_msi_message(uint8_t vector, uint8_t delivery_mode, uint8_t dest_mode, uint8_t dest, uint8_t rh) "vector %d delivery-mode %d dest-mode %d dest-id %d rh %d"
+amdvi_ir_irte_ga(uint64_t addr, uint64_t data) "addr 0x%"PRIx64" offset 0x%"PRIx64
+amdvi_ir_irte_ga_val(uint64_t hi, uint64_t lo) "hi 0x%"PRIx64" lo 0x%"PRIx64
# hw/i386/vmport.c
vmport_register(unsigned char command, void *func, void *opaque) "command: 0x%02x func: %p opaque: %p"