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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 09/18] x86/hvm: unify dpci portio intercept with standard portio intercept
This patch re-works the dpci portio intercepts so that they can be unified
with standard portio handling thereby removing a substantial amount of
code duplication.
Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Cc: Keir Fraser <keir@xxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 2 +
xen/arch/x86/hvm/intercept.c | 22 ++--
xen/arch/x86/hvm/io.c | 225 +++++++++++++---------------------------
xen/include/asm-x86/hvm/io.h | 8 ++
xen/include/asm-x86/hvm/vcpu.h | 2 +
xen/include/xen/iommu.h | 1 -
6 files changed, 88 insertions(+), 172 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index c10db78..f8486f4 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1486,6 +1486,8 @@ int hvm_domain_initialise(struct domain *d)
else
d->arch.hvm_domain.io_bitmap = hvm_io_bitmap;
+ register_dpci_portio_handler(d);
+
if ( is_pvh_domain(d) )
{
register_portio_handler(d, 0, 0x10003, handle_pvh_io);
diff --git a/xen/arch/x86/hvm/intercept.c b/xen/arch/x86/hvm/intercept.c
index 5e8d8b2..5633959 100644
--- a/xen/arch/x86/hvm/intercept.c
+++ b/xen/arch/x86/hvm/intercept.c
@@ -116,10 +116,7 @@ static int hvm_process_io_intercept(struct hvm_io_handler
*handler,
ioreq_t *p)
{
struct hvm_vcpu_io *vio = ¤t->arch.hvm_vcpu.hvm_io;
- const struct hvm_io_ops *ops =
- (p->type == IOREQ_TYPE_COPY) ?
- &mmio_ops :
- &portio_ops;
+ const struct hvm_io_ops *ops = handler->ops;
int rc = X86EMUL_OKAY, i, step = p->df ? -p->size : p->size;
uint64_t data;
uint64_t addr;
@@ -237,16 +234,13 @@ static struct hvm_io_handler *hvm_find_io_handler(ioreq_t
*p)
{
struct vcpu *curr = current;
struct domain *curr_d = curr->domain;
- const struct hvm_io_ops *ops =
- (p->type == IOREQ_TYPE_COPY) ?
- &mmio_ops :
- &portio_ops;
unsigned int i;
for ( i = 0; i < curr_d->arch.hvm_domain.io_handler_count; i++ )
{
struct hvm_io_handler *handler =
&curr_d->arch.hvm_domain.io_handler[i];
+ const struct hvm_io_ops *ops = handler->ops;
uint64_t start, end, count = p->count, size = p->size;
if ( handler->type != p->type )
@@ -285,13 +279,7 @@ int hvm_io_intercept(ioreq_t *p)
{
struct hvm_io_handler *handler;
- if ( p->type == IOREQ_TYPE_PIO )
- {
- int rc = dpci_ioport_intercept(p);
- if ( (rc == X86EMUL_OKAY) || (rc == X86EMUL_RETRY) )
- return rc;
- }
- else if ( p->type == IOREQ_TYPE_COPY )
+ if ( p->type == IOREQ_TYPE_COPY )
{
int rc = stdvga_intercept_mmio(p);
if ( (rc == X86EMUL_OKAY) || (rc == X86EMUL_RETRY) )
@@ -306,7 +294,7 @@ int hvm_io_intercept(ioreq_t *p)
return hvm_process_io_intercept(handler, p);
}
-static struct hvm_io_handler *hvm_next_io_handler(struct domain *d)
+struct hvm_io_handler *hvm_next_io_handler(struct domain *d)
{
unsigned int i = d->arch.hvm_domain.io_handler_count++;
@@ -321,6 +309,7 @@ void register_mmio_handler(struct domain *d, const struct
hvm_mmio_ops *ops)
struct hvm_io_handler *handler = hvm_next_io_handler(d);
handler->type = IOREQ_TYPE_COPY;
+ handler->ops = &mmio_ops;
handler->u.mmio.ops = ops;
}
@@ -330,6 +319,7 @@ void register_portio_handler(struct domain *d, uint32_t
addr,
struct hvm_io_handler *handler = hvm_next_io_handler(d);
handler->type = IOREQ_TYPE_PIO;
+ handler->ops = &portio_ops;
handler->u.portio.start = addr;
handler->u.portio.end = addr + size;
handler->u.portio.action = action;
diff --git a/xen/arch/x86/hvm/io.c b/xen/arch/x86/hvm/io.c
index c0964ec..51ef19a 100644
--- a/xen/arch/x86/hvm/io.c
+++ b/xen/arch/x86/hvm/io.c
@@ -208,185 +208,100 @@ void hvm_io_assist(ioreq_t *p)
}
}
-static int dpci_ioport_read(uint32_t mport, ioreq_t *p)
+static bool_t dpci_portio_accept(struct hvm_io_handler *handler,
+ uint64_t addr,
+ uint64_t size)
{
- struct hvm_vcpu_io *vio = ¤t->arch.hvm_vcpu.hvm_io;
- int rc = X86EMUL_OKAY, i, step = p->df ? -p->size : p->size;
- uint32_t data = 0;
+ struct vcpu *curr = current;
+ struct hvm_iommu *hd = domain_hvm_iommu(curr->domain);
+ struct hvm_vcpu_io *vio = &curr->arch.hvm_vcpu.hvm_io;
+ struct g2m_ioport *g2m_ioport;
+ uint32_t start, end;
+ uint32_t gport = addr, mport;
- for ( i = 0; i < p->count; i++ )
+ list_for_each_entry( g2m_ioport, &hd->arch.g2m_ioport_list, list )
{
- if ( vio->mmio_retrying )
- {
- if ( vio->mmio_large_read_bytes != p->size )
- return X86EMUL_UNHANDLEABLE;
- memcpy(&data, vio->mmio_large_read, p->size);
- vio->mmio_large_read_bytes = 0;
- vio->mmio_retrying = 0;
- }
- else switch ( p->size )
- {
- case 1:
- data = inb(mport);
- break;
- case 2:
- data = inw(mport);
- break;
- case 4:
- data = inl(mport);
- break;
- default:
- BUG();
- }
-
- if ( p->data_is_ptr )
- {
- switch ( hvm_copy_to_guest_phys(p->data + step * i,
- &data, p->size) )
- {
- case HVMCOPY_okay:
- break;
- case HVMCOPY_gfn_paged_out:
- case HVMCOPY_gfn_shared:
- rc = X86EMUL_RETRY;
- break;
- case HVMCOPY_bad_gfn_to_mfn:
- /* Drop the write as real hardware would. */
- continue;
- case HVMCOPY_bad_gva_to_gfn:
- ASSERT(0);
- /* fall through */
- default:
- rc = X86EMUL_UNHANDLEABLE;
- break;
- }
- if ( rc != X86EMUL_OKAY)
- break;
- }
- else
- p->data = data;
+ start = g2m_ioport->gport;
+ end = start + g2m_ioport->np;
+ if ( (gport >= start) && (gport + size <= end) )
+ goto found;
}
- if ( rc == X86EMUL_RETRY )
- {
- vio->mmio_retry = 1;
- vio->mmio_large_read_bytes = p->size;
- memcpy(vio->mmio_large_read, &data, p->size);
- }
+ return 0;
- if ( i != 0 )
- {
- p->count = i;
- rc = X86EMUL_OKAY;
- }
+ found:
+ mport = (gport - start) + g2m_ioport->mport;
- return rc;
+ vio->g2m_ioport = g2m_ioport;
+ return 1;
}
-static int dpci_ioport_write(uint32_t mport, ioreq_t *p)
+static int dpci_portio_read(struct hvm_io_handler *handler,
+ uint64_t addr,
+ uint64_t size,
+ uint64_t *data)
{
- int rc = X86EMUL_OKAY, i, step = p->df ? -p->size : p->size;
- uint32_t data;
-
- for ( i = 0; i < p->count; i++ )
- {
- data = p->data;
- if ( p->data_is_ptr )
- {
- switch ( hvm_copy_from_guest_phys(&data, p->data + step * i,
- p->size) )
- {
- case HVMCOPY_okay:
- break;
- case HVMCOPY_gfn_paged_out:
- case HVMCOPY_gfn_shared:
- rc = X86EMUL_RETRY;
- break;
- case HVMCOPY_bad_gfn_to_mfn:
- data = ~0;
- break;
- case HVMCOPY_bad_gva_to_gfn:
- ASSERT(0);
- /* fall through */
- default:
- rc = X86EMUL_UNHANDLEABLE;
- break;
- }
- if ( rc != X86EMUL_OKAY)
- break;
- }
-
- switch ( p->size )
- {
- case 1:
- outb(data, mport);
- break;
- case 2:
- outw(data, mport);
- break;
- case 4:
- outl(data, mport);
- break;
- default:
- BUG();
- }
- }
-
- if ( rc == X86EMUL_RETRY )
- current->arch.hvm_vcpu.hvm_io.mmio_retry = 1;
+ struct hvm_vcpu_io *vio = ¤t->arch.hvm_vcpu.hvm_io;
+ struct g2m_ioport *g2m_ioport = vio->g2m_ioport;
+ uint32_t mport = (addr - g2m_ioport->gport) + g2m_ioport->mport;
- if ( i != 0 )
+ switch ( size )
{
- p->count = i;
- rc = X86EMUL_OKAY;
+ case 1:
+ *data = inb(mport);
+ break;
+ case 2:
+ *data = inw(mport);
+ break;
+ case 4:
+ *data = inl(mport);
+ break;
+ default:
+ BUG();
}
- return rc;
+ return X86EMUL_OKAY;
}
-int dpci_ioport_intercept(ioreq_t *p)
+static int dpci_portio_write(struct hvm_io_handler *handler,
+ uint64_t addr,
+ uint64_t size,
+ uint64_t data)
{
- 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;
- int rc;
-
- list_for_each_entry( g2m_ioport, &hd->arch.g2m_ioport_list, list )
- {
- s = g2m_ioport->gport;
- e = s + g2m_ioport->np;
- if ( (gport >= s) && (gport < e) )
- goto found;
- }
-
- return X86EMUL_UNHANDLEABLE;
-
- found:
- mport = (gport - s) + g2m_ioport->mport;
-
- if ( !ioports_access_permitted(d, mport, mport + p->size - 1) )
- {
- gdprintk(XENLOG_ERR, "Error: access to gport=%#x denied!\n",
- (uint32_t)p->addr);
- return X86EMUL_UNHANDLEABLE;
- }
+ struct hvm_vcpu_io *vio = ¤t->arch.hvm_vcpu.hvm_io;
+ struct g2m_ioport *g2m_ioport = vio->g2m_ioport;
+ uint32_t mport = (addr - g2m_ioport->gport) + g2m_ioport->mport;
- switch ( p->dir )
+ switch ( size )
{
- case IOREQ_READ:
- rc = dpci_ioport_read(mport, p);
+ case 1:
+ outb(data, mport);
break;
- case IOREQ_WRITE:
- rc = dpci_ioport_write(mport, p);
+ case 2:
+ outw(data, mport);
+ break;
+ case 4:
+ outl(data, mport);
break;
default:
- gdprintk(XENLOG_ERR, "Error: couldn't handle p->dir = %d", p->dir);
- rc = X86EMUL_UNHANDLEABLE;
+ BUG();
}
- return rc;
+ return X86EMUL_OKAY;
+}
+
+static const struct hvm_io_ops dpci_portio_ops = {
+ .accept = dpci_portio_accept,
+ .read = dpci_portio_read,
+ .write = dpci_portio_write
+};
+
+void register_dpci_portio_handler(struct domain *d)
+{
+ struct hvm_io_handler *handler = hvm_next_io_handler(d);
+
+ handler->type = IOREQ_TYPE_PIO;
+ handler->ops = &dpci_portio_ops;
}
/*
diff --git a/xen/include/asm-x86/hvm/io.h b/xen/include/asm-x86/hvm/io.h
index b4596fc..afa27bf 100644
--- a/xen/include/asm-x86/hvm/io.h
+++ b/xen/include/asm-x86/hvm/io.h
@@ -48,6 +48,8 @@ struct hvm_mmio_ops {
typedef int (*portio_action_t)(
int dir, uint32_t port, uint32_t bytes, uint32_t *val);
+struct hvm_io_ops;
+
struct hvm_io_handler {
union {
struct {
@@ -58,6 +60,7 @@ struct hvm_io_handler {
portio_action_t action;
} portio;
} u;
+ const struct hvm_io_ops *ops;
uint8_t type;
};
@@ -81,6 +84,8 @@ struct hvm_io_ops {
int hvm_io_intercept(ioreq_t *p);
+struct hvm_io_handler *hvm_next_io_handler(struct domain *d);
+
void register_mmio_handler(struct domain *d,
const struct hvm_mmio_ops *ops);
void register_portio_handler(struct domain *d, uint32_t addr,
@@ -121,6 +126,9 @@ int stdvga_intercept_mmio(ioreq_t *p);
void stdvga_deinit(struct domain *d);
extern void hvm_dpci_msi_eoi(struct domain *d, int vector);
+
+void register_dpci_portio_handler(struct domain *d);
+
#endif /* __ASM_X86_HVM_IO_H__ */
diff --git a/xen/include/asm-x86/hvm/vcpu.h b/xen/include/asm-x86/hvm/vcpu.h
index 3d8f4dc..dd08416 100644
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -77,6 +77,8 @@ struct hvm_vcpu_io {
bool_t mmio_retry, mmio_retrying;
unsigned long msix_unmask_address;
+
+ struct g2m_ioport *g2m_ioport;
};
#define VMCX_EADDR (~0ULL)
diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index b30bf41..1d00696 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -93,7 +93,6 @@ void pt_pci_init(void);
struct pirq;
int hvm_do_IRQ_dpci(struct domain *, struct pirq *);
-int dpci_ioport_intercept(ioreq_t *p);
int pt_irq_create_bind(struct domain *, xen_domctl_bind_pt_irq_t *);
int pt_irq_destroy_bind(struct domain *, xen_domctl_bind_pt_irq_t *);
--
1.7.10.4
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