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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 02/16] xen/arm: make mmio handlers domain specific
From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
register mmio handlers at runtime and make
mmio handlers domain specific and check
handlers are removed.
Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
---
xen/arch/arm/domain.c | 3 +++
xen/arch/arm/io.c | 42 ++++++++++++++++++++++++++++++------------
xen/arch/arm/vgic.c | 16 +++++++---------
xen/arch/arm/vuart.c | 17 +++++++----------
xen/include/asm-arm/domain.h | 2 ++
xen/include/asm-arm/mmio.h | 13 ++++++++++---
6 files changed, 59 insertions(+), 34 deletions(-)
diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index e6ddedf..0d52457 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -521,6 +521,9 @@ int arch_domain_create(struct domain *d, unsigned int
domcr_flags)
share_xen_page_with_guest(
virt_to_page(d->shared_info), d, XENSHARE_writable);
+ if ( (rc = domain_io_init(d)) != 0 )
+ goto fail;
+
if ( (rc = p2m_alloc_table(d)) != 0 )
goto fail;
diff --git a/xen/arch/arm/io.c b/xen/arch/arm/io.c
index ada1918..1a0be89 100644
--- a/xen/arch/arm/io.c
+++ b/xen/arch/arm/io.c
@@ -18,29 +18,47 @@
#include <xen/config.h>
#include <xen/lib.h>
+#include <xen/spinlock.h>
+#include <xen/sched.h>
#include <asm/current.h>
#include <asm/mmio.h>
-static const struct mmio_handler *const mmio_handlers[] =
-{
- &vgic_distr_mmio_handler,
- &vuart_mmio_handler,
-};
-#define MMIO_HANDLER_NR ARRAY_SIZE(mmio_handlers)
-
int handle_mmio(mmio_info_t *info)
{
struct vcpu *v = current;
int i;
+ struct io_handler *mmio_handle = &v->domain->arch.io_handlers;
- for ( i = 0; i < MMIO_HANDLER_NR; i++ )
- if ( mmio_handlers[i]->check_handler(v, info->gpa) )
+ for ( i = 0; i < mmio_handle->num_entries; i++ )
+ {
+ if ( (info->gpa >= mmio_handle->mmio_handlers[i]->addr) &&
+ info->gpa < (mmio_handle->mmio_handlers[i]->addr +
mmio_handle->mmio_handlers[i]->size) )
return info->dabt.write ?
- mmio_handlers[i]->write_handler(v, info) :
- mmio_handlers[i]->read_handler(v, info);
-
+ mmio_handle->mmio_handlers[i]->write_handler(v, info) :
+ mmio_handle->mmio_handlers[i]->read_handler(v, info);
+ }
return 0;
}
+
+void register_mmio_handler(struct domain *d, struct mmio_handler * handle)
+{
+ struct io_handler *handler = &d->arch.io_handlers;
+
+ BUG_ON(handler->num_entries >= MAX_IO_HANDLER);
+
+ spin_lock(&handler->lock);
+ handler->mmio_handlers[handler->num_entries] = handle;
+ handler->num_entries++;
+ spin_unlock(&handler->lock);
+}
+
+int domain_io_init(struct domain *d)
+{
+ spin_lock_init(&d->arch.io_handlers.lock);
+ d->arch.io_handlers.num_entries = 0;
+ return 0;
+}
+
/*
* Local variables:
* mode: C
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 9c404fe..d36058a 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -35,6 +35,8 @@
/* Number of ranks of interrupt registers for a domain */
#define DOMAIN_NR_RANKS(d) (((d)->arch.vgic.nr_lines+31)/32)
+static struct mmio_handler vgic_distr_mmio_handler;
+
/*
* Rank containing GICD_<FOO><n> for GICD_<FOO> with
* <b>-bits-per-interrupt
@@ -98,6 +100,10 @@ int domain_vgic_init(struct domain *d)
}
for (i=0; i<DOMAIN_NR_RANKS(d); i++)
spin_lock_init(&d->arch.vgic.shared_irqs[i].lock);
+
+ vgic_distr_mmio_handler.addr = d->arch.vgic.dbase;
+ vgic_distr_mmio_handler.size = PAGE_SIZE;
+ register_mmio_handler(d, &vgic_distr_mmio_handler);
return 0;
}
@@ -657,15 +663,7 @@ write_ignore:
return 1;
}
-static int vgic_distr_mmio_check(struct vcpu *v, paddr_t addr)
-{
- struct domain *d = v->domain;
-
- return (addr >= (d->arch.vgic.dbase)) && (addr < (d->arch.vgic.dbase +
PAGE_SIZE));
-}
-
-const struct mmio_handler vgic_distr_mmio_handler = {
- .check_handler = vgic_distr_mmio_check,
+static struct mmio_handler vgic_distr_mmio_handler = {
.read_handler = vgic_distr_mmio_read,
.write_handler = vgic_distr_mmio_write,
};
diff --git a/xen/arch/arm/vuart.c b/xen/arch/arm/vuart.c
index 895e5cd..f43f2e5 100644
--- a/xen/arch/arm/vuart.c
+++ b/xen/arch/arm/vuart.c
@@ -44,6 +44,8 @@
#define domain_has_vuart(d) ((d)->arch.vuart.info != NULL)
+static struct mmio_handler vuart_mmio_handler;
+
int domain_vuart_init(struct domain *d)
{
ASSERT( !d->domain_id );
@@ -59,6 +61,10 @@ int domain_vuart_init(struct domain *d)
if ( !d->arch.vuart.buf )
return -ENOMEM;
+ vuart_mmio_handler.addr = d->arch.vuart.info->base_addr;
+ vuart_mmio_handler.size = d->arch.vuart.info->size;
+ register_mmio_handler(d, &vuart_mmio_handler);
+
return 0;
}
@@ -92,14 +98,6 @@ static void vuart_print_char(struct vcpu *v, char c)
spin_unlock(&uart->lock);
}
-static int vuart_mmio_check(struct vcpu *v, paddr_t addr)
-{
- const struct vuart_info *info = v->domain->arch.vuart.info;
-
- return (domain_has_vuart(v->domain) && addr >= info->base_addr &&
- addr <= (info->base_addr + info->size));
-}
-
static int vuart_mmio_read(struct vcpu *v, mmio_info_t *info)
{
struct domain *d = v->domain;
@@ -133,8 +131,7 @@ static int vuart_mmio_write(struct vcpu *v, mmio_info_t
*info)
return 1;
}
-const struct mmio_handler vuart_mmio_handler = {
- .check_handler = vuart_mmio_check,
+static struct mmio_handler vuart_mmio_handler = {
.read_handler = vuart_mmio_read,
.write_handler = vuart_mmio_write,
};
diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h
index 696f36c..999bbdd 100644
--- a/xen/include/asm-arm/domain.h
+++ b/xen/include/asm-arm/domain.h
@@ -7,6 +7,7 @@
#include <asm/page.h>
#include <asm/p2m.h>
#include <asm/vfp.h>
+#include <asm/mmio.h>
#include <public/hvm/params.h>
#include <xen/serial.h>
@@ -116,6 +117,7 @@ struct arch_domain
struct hvm_domain hvm_domain;
xen_pfn_t *grant_table_gpfn;
+ struct io_handler io_handlers;
/* Continuable domain_relinquish_resources(). */
enum {
RELMEM_not_started,
diff --git a/xen/include/asm-arm/mmio.h b/xen/include/asm-arm/mmio.h
index 44b28a6..2bb5f5e 100644
--- a/xen/include/asm-arm/mmio.h
+++ b/xen/include/asm-arm/mmio.h
@@ -35,15 +35,22 @@ typedef int (*mmio_write_t)(struct vcpu *v, mmio_info_t
*info);
typedef int (*mmio_check_t)(struct vcpu *v, paddr_t addr);
struct mmio_handler {
- mmio_check_t check_handler;
+ paddr_t addr;
+ unsigned long size;
mmio_read_t read_handler;
mmio_write_t write_handler;
};
-extern const struct mmio_handler vgic_distr_mmio_handler;
-extern const struct mmio_handler vuart_mmio_handler;
+#define MAX_IO_HANDLER 16
+struct io_handler {
+ int num_entries;
+ spinlock_t lock;
+ struct mmio_handler *mmio_handlers[MAX_IO_HANDLER];
+};
extern int handle_mmio(mmio_info_t *info);
+void register_mmio_handler(struct domain *d, struct mmio_handler * handle);
+int domain_io_init(struct domain *d);
#endif
--
1.7.9.5
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