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intel_iommu: Drop extended root field

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VTD_RTADDR_RTT is dropped even by the VT-d spec, so QEMU should
probably do the same thing (after all we never really implemented it).
Since we've had a field for that in the migration stream, to keep
compatibility we need to fill the hole up.

Please refer to VT-d spec 10.4.6.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20190329061422.7926-3-peterx@redhat.com>
Reviewed-by: Liu, Yi L <yi.l.liu@intel.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Peter Xu 2019-03-29 14:14:22 +08:00 committed by Michael S. Tsirkin
parent 2811af3b49
commit 81fb1e646e
4 changed files with 3 additions and 7 deletions
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6
hw/i386/intel_iommu.c
View file

@ -1718,12 +1718,11 @@ error:
static void vtd_root_table_setup(IntelIOMMUState *s)
{
s->root = vtd_get_quad_raw(s, DMAR_RTADDR_REG);
s->root_extended = s->root & VTD_RTADDR_RTT;
s->root &= VTD_RTADDR_ADDR_MASK(s->aw_bits);
vtd_update_scalable_state(s);
trace_vtd_reg_dmar_root(s->root, s->root_extended);
trace_vtd_reg_dmar_root(s->root, s->root_scalable);
}
static void vtd_iec_notify_all(IntelIOMMUState *s, bool global,
@ -2982,7 +2981,7 @@ static const VMStateDescription vtd_vmstate = {
VMSTATE_UINT16(next_frcd_reg, IntelIOMMUState),
VMSTATE_UINT8_ARRAY(csr, IntelIOMMUState, DMAR_REG_SIZE),
VMSTATE_UINT8(iq_last_desc_type, IntelIOMMUState),
VMSTATE_BOOL(root_extended, IntelIOMMUState),
VMSTATE_UNUSED(1), /* bool root_extended is obsolete by VT-d */
VMSTATE_BOOL(dmar_enabled, IntelIOMMUState),
VMSTATE_BOOL(qi_enabled, IntelIOMMUState),
VMSTATE_BOOL(intr_enabled, IntelIOMMUState),
@ -3503,7 +3502,6 @@ static void vtd_init(IntelIOMMUState *s)
memset(s->womask, 0, DMAR_REG_SIZE);
s->root = 0;
s->root_extended = false;
s->root_scalable = false;
s->dmar_enabled = false;
s->intr_enabled = false;

1
hw/i386/intel_iommu_internal.h
View file

@ -171,7 +171,6 @@
#define VTD_CCMD_FM(val) (((val) >> 32) & 3ULL)
/* RTADDR_REG */
#define VTD_RTADDR_RTT (1ULL << 11)
#define VTD_RTADDR_SMT (1ULL << 10)
#define VTD_RTADDR_ADDR_MASK(aw) (VTD_HAW_MASK(aw) ^ 0xfffULL)

2
hw/i386/trace-events
View file

@ -45,7 +45,7 @@ vtd_pt_enable_fast_path(uint16_t sid, bool success) "sid 0x%"PRIu16" %d"
vtd_irq_generate(uint64_t addr, uint64_t data) "addr 0x%"PRIx64" data 0x%"PRIx64
vtd_reg_read(uint64_t addr, uint64_t size) "addr 0x%"PRIx64" size 0x%"PRIx64
vtd_reg_write(uint64_t addr, uint64_t size, uint64_t val) "addr 0x%"PRIx64" size 0x%"PRIx64" value 0x%"PRIx64
vtd_reg_dmar_root(uint64_t addr, bool extended) "addr 0x%"PRIx64" extended %d"
vtd_reg_dmar_root(uint64_t addr, bool scalable) "addr 0x%"PRIx64" scalable %d"
vtd_reg_ir_root(uint64_t addr, uint32_t size) "addr 0x%"PRIx64" size 0x%"PRIx32
vtd_reg_write_gcmd(uint32_t status, uint32_t val) "status 0x%"PRIx32" value 0x%"PRIx32
vtd_reg_write_fectl(uint32_t value) "value 0x%"PRIx32

1
include/hw/i386/intel_iommu.h
View file

@ -234,7 +234,6 @@ struct IntelIOMMUState {
bool scalable_mode; /* RO - is Scalable Mode supported? */
dma_addr_t root; /* Current root table pointer */
bool root_extended; /* Type of root table (extended or not) */
bool root_scalable; /* Type of root table (scalable or not) */
bool dmar_enabled; /* Set if DMA remapping is enabled */