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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v8 10/17] vt-d: Extend struct iremap_entry to support VT-d Posted-Interrupts
Extend struct iremap_entry according to VT-d Posted-Interrupts Spec.
CC: Yang Zhang <yang.z.zhang@xxxxxxxxx>
CC: Kevin Tian <kevin.tian@xxxxxxxxx>
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
v8:
- Make use of the __uint128_t member in struct iremap_entry when needed
v7:
- Add a __uint128_t member to the union in struct iremap_entry
v4:
- res_4 is not a bitfiled, correct it.
- Expose 'im' to remapped irte as well.
v3:
- Use u32 instead of u64 to define the bitfields in 'struct iremap_entry'
- Limit using bitfield if possible
xen/drivers/passthrough/vtd/intremap.c | 92 +++++++++++++++++-----------------
xen/drivers/passthrough/vtd/iommu.h | 44 ++++++++++------
xen/drivers/passthrough/vtd/utils.c | 8 +--
3 files changed, 81 insertions(+), 63 deletions(-)
diff --git a/xen/drivers/passthrough/vtd/intremap.c
b/xen/drivers/passthrough/vtd/intremap.c
index 987bbe9..8f135e1 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -122,9 +122,9 @@ static u16 hpetid_to_bdf(unsigned int hpet_id)
static void set_ire_sid(struct iremap_entry *ire,
unsigned int svt, unsigned int sq, unsigned int sid)
{
- ire->hi.svt = svt;
- ire->hi.sq = sq;
- ire->hi.sid = sid;
+ ire->remap.svt = svt;
+ ire->remap.sq = sq;
+ ire->remap.sid = sid;
}
static void set_ioapic_source_id(int apic_id, struct iremap_entry *ire)
@@ -219,7 +219,7 @@ static unsigned int alloc_remap_entry(struct iommu *iommu,
unsigned int nr)
else
p = &iremap_entries[i % (1 << IREMAP_ENTRY_ORDER)];
- if ( p->lo_val || p->hi_val ) /* not a free entry */
+ if ( p->val ) /* not a free entry */
found = 0;
else if ( ++found == nr )
break;
@@ -253,7 +253,7 @@ static int remap_entry_to_ioapic_rte(
GET_IREMAP_ENTRY(ir_ctrl->iremap_maddr, index,
iremap_entries, iremap_entry);
- if ( iremap_entry->hi_val == 0 && iremap_entry->lo_val == 0 )
+ if ( iremap_entry->val == 0 )
{
dprintk(XENLOG_ERR VTDPREFIX,
"%s: index (%d) get an empty entry!\n",
@@ -263,13 +263,13 @@ static int remap_entry_to_ioapic_rte(
return -EFAULT;
}
- old_rte->vector = iremap_entry->lo.vector;
- old_rte->delivery_mode = iremap_entry->lo.dlm;
- old_rte->dest_mode = iremap_entry->lo.dm;
- old_rte->trigger = iremap_entry->lo.tm;
+ old_rte->vector = iremap_entry->remap.vector;
+ old_rte->delivery_mode = iremap_entry->remap.dlm;
+ old_rte->dest_mode = iremap_entry->remap.dm;
+ old_rte->trigger = iremap_entry->remap.tm;
old_rte->__reserved_2 = 0;
old_rte->dest.logical.__reserved_1 = 0;
- old_rte->dest.logical.logical_dest = iremap_entry->lo.dst >> 8;
+ old_rte->dest.logical.logical_dest = iremap_entry->remap.dst >> 8;
unmap_vtd_domain_page(iremap_entries);
spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
@@ -317,27 +317,28 @@ static int ioapic_rte_to_remap_entry(struct iommu *iommu,
if ( rte_upper )
{
if ( x2apic_enabled )
- new_ire.lo.dst = value;
+ new_ire.remap.dst = value;
else
- new_ire.lo.dst = (value >> 24) << 8;
+ new_ire.remap.dst = (value >> 24) << 8;
}
else
{
*(((u32 *)&new_rte) + 0) = value;
- new_ire.lo.fpd = 0;
- new_ire.lo.dm = new_rte.dest_mode;
- new_ire.lo.tm = new_rte.trigger;
- new_ire.lo.dlm = new_rte.delivery_mode;
+ new_ire.remap.fpd = 0;
+ new_ire.remap.dm = new_rte.dest_mode;
+ new_ire.remap.tm = new_rte.trigger;
+ new_ire.remap.dlm = new_rte.delivery_mode;
/* Hardware require RH = 1 for LPR delivery mode */
- new_ire.lo.rh = (new_ire.lo.dlm == dest_LowestPrio);
- new_ire.lo.avail = 0;
- new_ire.lo.res_1 = 0;
- new_ire.lo.vector = new_rte.vector;
- new_ire.lo.res_2 = 0;
+ new_ire.remap.rh = (new_ire.remap.dlm == dest_LowestPrio);
+ new_ire.remap.avail = 0;
+ new_ire.remap.res_1 = 0;
+ new_ire.remap.vector = new_rte.vector;
+ new_ire.remap.res_2 = 0;
set_ioapic_source_id(IO_APIC_ID(apic), &new_ire);
- new_ire.hi.res_1 = 0;
- new_ire.lo.p = 1; /* finally, set present bit */
+ new_ire.remap.res_3 = 0;
+ new_ire.remap.res_4 = 0;
+ new_ire.remap.p = 1; /* finally, set present bit */
/* now construct new ioapic rte entry */
remap_rte->vector = new_rte.vector;
@@ -510,7 +511,7 @@ static int remap_entry_to_msi_msg(
GET_IREMAP_ENTRY(ir_ctrl->iremap_maddr, index,
iremap_entries, iremap_entry);
- if ( iremap_entry->hi_val == 0 && iremap_entry->lo_val == 0 )
+ if ( iremap_entry->val == 0 )
{
dprintk(XENLOG_ERR VTDPREFIX,
"%s: index (%d) get an empty entry!\n",
@@ -523,25 +524,25 @@ static int remap_entry_to_msi_msg(
msg->address_hi = MSI_ADDR_BASE_HI;
msg->address_lo =
MSI_ADDR_BASE_LO |
- ((iremap_entry->lo.dm == 0) ?
+ ((iremap_entry->remap.dm == 0) ?
MSI_ADDR_DESTMODE_PHYS:
MSI_ADDR_DESTMODE_LOGIC) |
- ((iremap_entry->lo.dlm != dest_LowestPrio) ?
+ ((iremap_entry->remap.dlm != dest_LowestPrio) ?
MSI_ADDR_REDIRECTION_CPU:
MSI_ADDR_REDIRECTION_LOWPRI);
if ( x2apic_enabled )
- msg->dest32 = iremap_entry->lo.dst;
+ msg->dest32 = iremap_entry->remap.dst;
else
- msg->dest32 = (iremap_entry->lo.dst >> 8) & 0xff;
+ msg->dest32 = (iremap_entry->remap.dst >> 8) & 0xff;
msg->address_lo |= MSI_ADDR_DEST_ID(msg->dest32);
msg->data =
MSI_DATA_TRIGGER_EDGE |
MSI_DATA_LEVEL_ASSERT |
- ((iremap_entry->lo.dlm != dest_LowestPrio) ?
+ ((iremap_entry->remap.dlm != dest_LowestPrio) ?
MSI_DATA_DELIVERY_FIXED:
MSI_DATA_DELIVERY_LOWPRI) |
- iremap_entry->lo.vector;
+ iremap_entry->remap.vector;
unmap_vtd_domain_page(iremap_entries);
spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
@@ -600,29 +601,30 @@ static int msi_msg_to_remap_entry(
memcpy(&new_ire, iremap_entry, sizeof(struct iremap_entry));
/* Set interrupt remapping table entry */
- new_ire.lo.fpd = 0;
- new_ire.lo.dm = (msg->address_lo >> MSI_ADDR_DESTMODE_SHIFT) & 0x1;
- new_ire.lo.tm = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
- new_ire.lo.dlm = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x1;
+ new_ire.remap.fpd = 0;
+ new_ire.remap.dm = (msg->address_lo >> MSI_ADDR_DESTMODE_SHIFT) & 0x1;
+ new_ire.remap.tm = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
+ new_ire.remap.dlm = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x1;
/* Hardware require RH = 1 for LPR delivery mode */
- new_ire.lo.rh = (new_ire.lo.dlm == dest_LowestPrio);
- new_ire.lo.avail = 0;
- new_ire.lo.res_1 = 0;
- new_ire.lo.vector = (msg->data >> MSI_DATA_VECTOR_SHIFT) &
- MSI_DATA_VECTOR_MASK;
- new_ire.lo.res_2 = 0;
+ new_ire.remap.rh = (new_ire.remap.dlm == dest_LowestPrio);
+ new_ire.remap.avail = 0;
+ new_ire.remap.res_1 = 0;
+ new_ire.remap.vector = (msg->data >> MSI_DATA_VECTOR_SHIFT) &
+ MSI_DATA_VECTOR_MASK;
+ new_ire.remap.res_2 = 0;
if ( x2apic_enabled )
- new_ire.lo.dst = msg->dest32;
+ new_ire.remap.dst = msg->dest32;
else
- new_ire.lo.dst = ((msg->address_lo >> MSI_ADDR_DEST_ID_SHIFT)
- & 0xff) << 8;
+ new_ire.remap.dst = ((msg->address_lo >> MSI_ADDR_DEST_ID_SHIFT)
+ & 0xff) << 8;
if ( pdev )
set_msi_source_id(pdev, &new_ire);
else
set_hpet_source_id(msi_desc->hpet_id, &new_ire);
- new_ire.hi.res_1 = 0;
- new_ire.lo.p = 1; /* finally, set present bit */
+ new_ire.remap.res_3 = 0;
+ new_ire.remap.res_4 = 0;
+ new_ire.remap.p = 1; /* finally, set present bit */
/* now construct new MSI/MSI-X rte entry */
remap_rte = (struct msi_msg_remap_entry *)msg;
diff --git a/xen/drivers/passthrough/vtd/iommu.h
b/xen/drivers/passthrough/vtd/iommu.h
index 22abefe..b440b69 100644
--- a/xen/drivers/passthrough/vtd/iommu.h
+++ b/xen/drivers/passthrough/vtd/iommu.h
@@ -281,29 +281,45 @@ struct dma_pte {
/* interrupt remap entry */
struct iremap_entry {
union {
- u64 lo_val;
+ __uint128_t val;
+ struct { u64 lo, hi; };
struct {
- u64 p : 1,
+ u16 p : 1,
fpd : 1,
dm : 1,
rh : 1,
tm : 1,
dlm : 3,
avail : 4,
- res_1 : 4,
- vector : 8,
- res_2 : 8,
- dst : 32;
- }lo;
- };
- union {
- u64 hi_val;
+ res_1 : 3,
+ im : 1;
+ u8 vector;
+ u8 res_2;
+ u32 dst;
+ u16 sid;
+ u16 sq : 2,
+ svt : 2,
+ res_3 : 12;
+ u32 res_4;
+ } remap;
struct {
- u64 sid : 16,
- sq : 2,
+ u16 p : 1,
+ fpd : 1,
+ res_1 : 6,
+ avail : 4,
+ res_2 : 2,
+ urg : 1,
+ im : 1;
+ u8 vector;
+ u8 res_3;
+ u32 res_4 : 6,
+ pda_l : 26;
+ u16 sid;
+ u16 sq : 2,
svt : 2,
- res_1 : 44;
- }hi;
+ res_5 : 12;
+ u32 pda_h;
+ } post;
};
};
diff --git a/xen/drivers/passthrough/vtd/utils.c
b/xen/drivers/passthrough/vtd/utils.c
index a75059f..6daa156 100644
--- a/xen/drivers/passthrough/vtd/utils.c
+++ b/xen/drivers/passthrough/vtd/utils.c
@@ -230,13 +230,13 @@ static void dump_iommu_info(unsigned char key)
else
p = &iremap_entries[i % (1 << IREMAP_ENTRY_ORDER)];
- if ( !p->lo.p )
+ if ( !p->remap.p )
continue;
printk(" %04x: %x %x %04x %08x %02x %x %x %x %x
%x"
" %x %x\n", i,
- p->hi.svt, p->hi.sq, p->hi.sid, p->lo.dst, p->lo.vector,
- p->lo.avail, p->lo.dlm, p->lo.tm, p->lo.rh, p->lo.dm,
- p->lo.fpd, p->lo.p);
+ p->remap.svt, p->remap.sq, p->remap.sid, p->remap.dst,
+ p->remap.vector, p->remap.avail, p->remap.dlm, p->remap.tm,
+ p->remap.rh, p->remap.dm, p->remap.fpd, p->remap.p);
print_cnt++;
}
if ( iremap_entries )
--
2.1.0
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