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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] PCI passthru: VT-d I/O hooks.
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1190189526 -3600
# Node ID aad813d8a8ad6f9d7d4f0d04a14fe088dd671e96
# Parent b7eb2bb9b6251c0533bac7361218c398ad3e8cbf
PCI passthru: VT-d I/O hooks.
Signed-off-by: Allen Kay <allen.m.kay@xxxxxxxxx>
Signed-off-by: Guy Zana <guy@xxxxxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 5 +
xen/arch/x86/hvm/intercept.c | 4 +
xen/arch/x86/hvm/io.c | 118 +++++++++++++++++++++++++++++++++
xen/arch/x86/hvm/vmx/vtd/intel-iommu.c | 19 ++---
xen/arch/x86/hvm/vmx/vtd/io.c | 32 ++++++++
xen/drivers/acpi/tables.c | 1
xen/include/asm-x86/hvm/iommu.h | 7 +
xen/include/asm-x86/iommu.h | 5 +
8 files changed, 181 insertions(+), 10 deletions(-)
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/arch/x86/hvm/hvm.c Wed Sep 19 09:12:06 2007 +0100
@@ -48,6 +48,7 @@
#include <public/hvm/ioreq.h>
#include <public/version.h>
#include <public/memory.h>
+#include <asm/iommu.h>
int hvm_enabled __read_mostly;
@@ -214,6 +215,10 @@ int hvm_domain_initialise(struct domain
spin_lock_init(&d->arch.hvm_domain.pbuf_lock);
spin_lock_init(&d->arch.hvm_domain.irq_lock);
+
+ rc = iommu_domain_init(d);
+ if ( rc != 0 )
+ return rc;
rc = paging_enable(d, PG_refcounts|PG_translate|PG_external);
if ( rc != 0 )
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/arch/x86/hvm/intercept.c
--- a/xen/arch/x86/hvm/intercept.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/arch/x86/hvm/intercept.c Wed Sep 19 09:12:06 2007 +0100
@@ -29,6 +29,7 @@
#include <asm/current.h>
#include <io_ports.h>
#include <xen/event.h>
+#include <asm/iommu.h>
extern struct hvm_mmio_handler hpet_mmio_handler;
@@ -242,6 +243,9 @@ int hvm_io_intercept(ioreq_t *p, int typ
&(v->domain->arch.hvm_domain.io_handler);
int i;
unsigned long addr, size;
+
+ if ( (type == HVM_PORTIO) && (dpci_ioport_intercept(p)) )
+ return 1;
for (i = 0; i < handler->num_slot; i++) {
if( type != handler->hdl_list[i].type)
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/arch/x86/hvm/io.c
--- a/xen/arch/x86/hvm/io.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/arch/x86/hvm/io.c Wed Sep 19 09:12:06 2007 +0100
@@ -42,6 +42,7 @@
#include <asm/hvm/vlapic.h>
#include <public/sched.h>
+#include <xen/iocap.h>
#include <public/hvm/ioreq.h>
#if defined (__i386__)
@@ -864,6 +865,123 @@ void hvm_io_assist(void)
vcpu_end_shutdown_deferral(v);
}
+void dpci_ioport_read(uint32_t mport, ioreq_t *p)
+{
+ uint64_t i;
+ uint64_t z_data;
+ uint64_t length = (p->count * p->size);
+
+ for ( i = 0; i < length; i += p->size )
+ {
+ z_data = ~0ULL;
+
+ switch ( p->size )
+ {
+ case BYTE:
+ z_data = (uint64_t)inb(mport);
+ break;
+ case WORD:
+ z_data = (uint64_t)inw(mport);
+ break;
+ case LONG:
+ z_data = (uint64_t)inl(mport);
+ break;
+ default:
+ gdprintk(XENLOG_ERR, "Error: unable to handle size: %"
+ PRId64 "\n", p->size);
+ return;
+ }
+
+ p->data = z_data;
+ if ( p->data_is_ptr &&
+ hvm_copy_to_guest_phys(p->data + i, (void *)&z_data,
+ (int)p->size) )
+ {
+ gdprintk(XENLOG_ERR, "Error: couldn't copy to hvm phys\n");
+ return;
+ }
+ }
+}
+
+void dpci_ioport_write(uint32_t mport, ioreq_t *p)
+{
+ uint64_t i;
+ uint64_t z_data = 0;
+ uint64_t length = (p->count * p->size);
+
+ for ( i = 0; i < length; i += p->size )
+ {
+ z_data = p->data;
+ if ( p->data_is_ptr &&
+ hvm_copy_from_guest_phys((void *)&z_data,
+ p->data + i, (int)p->size) )
+ {
+ gdprintk(XENLOG_ERR, "Error: couldn't copy from hvm phys\n");
+ return;
+ }
+
+ switch ( p->size )
+ {
+ case BYTE:
+ outb((uint8_t) z_data, mport);
+ break;
+ case WORD:
+ outw((uint16_t) z_data, mport);
+ break;
+ case LONG:
+ outl((uint32_t) z_data, mport);
+ break;
+ default:
+ gdprintk(XENLOG_ERR, "Error: unable to handle size: %"
+ PRId64 "\n", p->size);
+ break;
+ }
+ }
+}
+
+int dpci_ioport_intercept(ioreq_t *p)
+{
+ struct domain *d = current->domain;
+ struct hvm_iommu *hd = domain_hvm_iommu(d);
+ struct g2m_ioport *g2m_ioport;
+ unsigned int mport, gport = p->addr;
+ unsigned int s = 0, e = 0;
+
+ list_for_each_entry( g2m_ioport, &hd->g2m_ioport_list, list )
+ {
+ s = g2m_ioport->gport;
+ e = s + g2m_ioport->np;
+ if ( (gport >= s) && (gport < e) )
+ goto found;
+ }
+
+ return 0;
+
+ found:
+ mport = (gport - s) + g2m_ioport->mport;
+
+ if ( !ioports_access_permitted(d, mport, mport + p->size - 1) )
+ {
+ gdprintk(XENLOG_ERR, "Error: access to gport=0x%x denied!\n",
+ (uint32_t)p->addr);
+ return 0;
+ }
+
+ switch ( p->dir )
+ {
+ case IOREQ_READ:
+ dpci_ioport_read(mport, p);
+ break;
+ case IOREQ_WRITE:
+ dpci_ioport_write(mport, p);
+ break;
+ default:
+ gdprintk(XENLOG_ERR, "Error: couldn't handle p->dir = %d", p->dir);
+ }
+
+ return 1;
+}
+
/*
* Local variables:
* mode: C
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/arch/x86/hvm/vmx/vtd/intel-iommu.c
--- a/xen/arch/x86/hvm/vmx/vtd/intel-iommu.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/arch/x86/hvm/vmx/vtd/intel-iommu.c Wed Sep 19 09:12:06 2007 +0100
@@ -929,18 +929,16 @@ int iommu_domain_init(struct domain *dom
unsigned long sagaw;
struct acpi_drhd_unit *drhd;
- if (list_empty(&acpi_drhd_units))
- return 0;
spin_lock_init(&hd->mapping_lock);
spin_lock_init(&hd->iommu_list_lock);
INIT_LIST_HEAD(&hd->pdev_list);
-
- for_each_drhd_unit(drhd) {
- if (drhd->iommu)
- iommu = drhd->iommu;
- else
- iommu = iommu_alloc(drhd);
- }
+ INIT_LIST_HEAD(&hd->g2m_ioport_list);
+
+ if ( !vtd_enabled || list_empty(&acpi_drhd_units) )
+ return 0;
+
+ for_each_drhd_unit ( drhd )
+ iommu = drhd->iommu ? : iommu_alloc(drhd);
/* calculate AGAW */
if (guest_width > cap_mgaw(iommu->cap))
@@ -949,7 +947,8 @@ int iommu_domain_init(struct domain *dom
agaw = width_to_agaw(adjust_width);
/* FIXME: hardware doesn't support it, choose a bigger one? */
sagaw = cap_sagaw(iommu->cap);
- if (!test_bit(agaw, &sagaw)) {
+ if ( !test_bit(agaw, &sagaw) )
+ {
gdprintk(XENLOG_ERR VTDPREFIX,
"IOMMU: hardware doesn't support the agaw\n");
agaw = find_next_bit(&sagaw, 5, agaw);
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/arch/x86/hvm/vmx/vtd/io.c
--- a/xen/arch/x86/hvm/vmx/vtd/io.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/arch/x86/hvm/vmx/vtd/io.c Wed Sep 19 09:12:06 2007 +0100
@@ -43,7 +43,39 @@
#include <public/sched.h>
#include <xen/iocap.h>
#include <public/hvm/ioreq.h>
+#include <public/domctl.h>
+int pt_irq_create_bind_vtd(
+ struct domain *d,
+ xen_domctl_bind_pt_irq_t * pt_irq_bind)
+{
+ struct hvm_domain *hd = &d->arch.hvm_domain;
+ uint32_t machine_gsi, guest_gsi;
+ uint32_t device, intx;
+
+ machine_gsi = pt_irq_bind->machine_irq;
+ device = pt_irq_bind->u.pci.device;
+ intx = pt_irq_bind->u.pci.intx;
+ guest_gsi = hvm_pci_intx_gsi(device, intx);
+
+ hd->irq.mirq[machine_gsi].valid = 1;
+ hd->irq.mirq[machine_gsi].device = device;
+ hd->irq.mirq[machine_gsi].intx = intx;
+ hd->irq.mirq[machine_gsi].guest_gsi = guest_gsi;
+
+ hd->irq.girq[guest_gsi].valid = 1;
+ hd->irq.girq[guest_gsi].device = device;
+ hd->irq.girq[guest_gsi].intx = intx;
+ hd->irq.girq[guest_gsi].machine_gsi = machine_gsi;
+
+ /* Deal with gsi for legacy devices */
+ pirq_guest_bind(d->vcpu[0], machine_gsi, BIND_PIRQ__WILL_SHARE);
+ gdprintk(XENLOG_ERR,
+ "XEN_DOMCTL_irq_mapping: m_irq = %x device = %x intx = %x\n",
+ machine_gsi, device, intx);
+
+ return 0;
+}
int hvm_do_IRQ_dpci(struct domain *d, unsigned int mirq)
{
uint32_t device, intx;
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/drivers/acpi/tables.c
--- a/xen/drivers/acpi/tables.c Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/drivers/acpi/tables.c Wed Sep 19 09:12:06 2007 +0100
@@ -59,6 +59,7 @@ static char *acpi_table_signatures[ACPI_
[ACPI_SPMI] = "SPMI",
[ACPI_HPET] = "HPET",
[ACPI_MCFG] = "MCFG",
+ [ACPI_DMAR] = "DMAR",
};
static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/include/asm-x86/hvm/iommu.h
--- a/xen/include/asm-x86/hvm/iommu.h Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/include/asm-x86/hvm/iommu.h Wed Sep 19 09:12:06 2007 +0100
@@ -28,6 +28,13 @@
#include <public/hvm/params.h>
#include <public/hvm/save.h>
+struct g2m_ioport {
+ struct list_head list;
+ unsigned int gport;
+ unsigned int mport;
+ unsigned int np;
+};
+
struct hvm_iommu {
spinlock_t iommu_list_lock; /* protect iommu specific lists */
struct list_head pdev_list; /* direct accessed pci devices */
diff -r b7eb2bb9b625 -r aad813d8a8ad xen/include/asm-x86/iommu.h
--- a/xen/include/asm-x86/iommu.h Tue Sep 18 16:09:19 2007 +0100
+++ b/xen/include/asm-x86/iommu.h Wed Sep 19 09:12:06 2007 +0100
@@ -28,6 +28,7 @@
#include <xen/xmalloc.h>
#include <asm/hvm/vmx/intel-iommu.h>
#include <public/hvm/ioreq.h>
+#include <public/domctl.h>
extern int vtd_enabled;
@@ -75,5 +76,9 @@ void iommu_set_pgd(struct domain *d);
void iommu_set_pgd(struct domain *d);
void iommu_domain_teardown(struct domain *d);
int hvm_do_IRQ_dpci(struct domain *d, unsigned int irq);
+int dpci_ioport_intercept(ioreq_t *p);
+int pt_irq_create_bind_vtd(struct domain *d,
+ xen_domctl_bind_pt_irq_t * pt_irq_bind);
+
#endif // _IOMMU_H_
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