Mailing List Archive

# HG changeset patch
# User kaf24@localhost.localdomain
# Date 1169904747 0
# Node ID d1710eb353855a5fac71e5507deb3d3a131a7de2
# Parent 271ffb1c12ebc1375386a41598a7b3ae72f16871
[HVM] Allow HVM guest to request invalidation of foreign mappings via
an I/O port write.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
---
tools/ioemu/hw/xen_platform.c | 11 +---
tools/ioemu/target-i386-dm/exec-dm.c | 12 ----
tools/ioemu/vl.c | 38 +++++++++++++--
tools/ioemu/vl.h | 17 ++++++
unmodified_drivers/linux-2.6/platform-pci/platform-pci.c | 10 +++
5 files changed, 64 insertions(+), 24 deletions(-)

diff -r 271ffb1c12eb -r d1710eb35385 tools/ioemu/hw/xen_platform.c
--- a/tools/ioemu/hw/xen_platform.c Fri Jan 26 18:38:40 2007 +0000
+++ b/tools/ioemu/hw/xen_platform.c Sat Jan 27 13:32:27 2007 +0000
@@ -31,19 +31,14 @@ extern FILE *logfile;

static void platform_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
- return;
-}
-
-static uint32_t platform_ioport_read(void *opaque, uint32_t addr)
-{
- return 0;
+ if (val == 0)
+ qemu_invalidate_map_cache();
}

static void platform_ioport_map(PCIDevice *pci_dev, int region_num,
uint32_t addr, uint32_t size, int type)
{
- register_ioport_write(addr, 16, 4, platform_ioport_write, NULL);
- register_ioport_read(addr, 16, 1, platform_ioport_read, NULL);
+ register_ioport_write(addr, 1, 1, platform_ioport_write, NULL);
}

static uint32_t platform_mmio_read(void *opaque, target_phys_addr_t addr)
diff -r 271ffb1c12eb -r d1710eb35385 tools/ioemu/target-i386-dm/exec-dm.c
--- a/tools/ioemu/target-i386-dm/exec-dm.c Fri Jan 26 18:38:40 2007 +0000
+++ b/tools/ioemu/target-i386-dm/exec-dm.c Sat Jan 27 13:32:27 2007 +0000
@@ -129,18 +129,8 @@ int loglevel;
int loglevel;


-#if defined(__i386__) || defined(__x86_64__)
-#define MAPCACHE
-#endif
-
#ifdef MAPCACHE
-#include <pthread.h>
-static pthread_mutex_t mapcache_mutex;
-#define mapcache_lock() pthread_mutex_lock(&mapcache_mutex)
-#define mapcache_unlock() pthread_mutex_unlock(&mapcache_mutex)
-#else
-#define mapcache_lock() ( (void)0 )
-#define mapcache_unlock() ( (void)0 )
+pthread_mutex_t mapcache_mutex;
#endif


diff -r 271ffb1c12eb -r d1710eb35385 tools/ioemu/vl.c
--- a/tools/ioemu/vl.c Fri Jan 26 18:38:40 2007 +0000
+++ b/tools/ioemu/vl.c Sat Jan 27 13:32:27 2007 +0000
@@ -285,7 +285,7 @@ int register_ioport_write(int start, int
for(i = start; i < start + length; i += size) {
ioport_write_table[bsize][i] = func;
if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
- hw_error("register_ioport_read: invalid opaque");
+ hw_error("register_ioport_write: invalid opaque");
ioport_opaque[i] = opaque;
}
return 0;
@@ -5826,6 +5826,10 @@ static struct map_cache *mapcache_entry;
static struct map_cache *mapcache_entry;
static unsigned long nr_buckets;

+/* For most cases (>99.9%), the page address is the same. */
+static unsigned long last_address_index = ~0UL;
+static uint8_t *last_address_vaddr;
+
static int qemu_map_cache_init(unsigned long nr_pages)
{
unsigned long max_pages = MAX_MCACHE_SIZE >> PAGE_SHIFT;
@@ -5862,10 +5866,6 @@ uint8_t *qemu_map_cache(target_phys_addr
unsigned long address_index = phys_addr >> MCACHE_BUCKET_SHIFT;
unsigned long address_offset = phys_addr & (MCACHE_BUCKET_SIZE-1);

- /* For most cases (>99.9%), the page address is the same. */
- static unsigned long last_address_index = ~0UL;
- static uint8_t *last_address_vaddr;
-
if (address_index == last_address_index)
return last_address_vaddr + address_offset;

@@ -5904,6 +5904,34 @@ uint8_t *qemu_map_cache(target_phys_addr
last_address_vaddr = entry->vaddr_base;

return last_address_vaddr + address_offset;
+}
+
+void qemu_invalidate_map_cache(void)
+{
+ unsigned long i;
+
+ mapcache_lock();
+
+ for (i = 0; i < nr_buckets; i++) {
+ struct map_cache *entry = &mapcache_entry[i];
+
+ if (entry->vaddr_base == NULL)
+ continue;
+
+ errno = munmap(entry->vaddr_base, MCACHE_BUCKET_SIZE);
+ if (errno) {
+ fprintf(logfile, "unmap fails %d\n", errno);
+ exit(-1);
+ }
+
+ entry->paddr_index = 0;
+ entry->vaddr_base = NULL;
+ }
+
+ last_address_index = ~0UL;
+ last_address_vaddr = NULL;
+
+ mapcache_unlock();
}
#endif

diff -r 271ffb1c12eb -r d1710eb35385 tools/ioemu/vl.h
--- a/tools/ioemu/vl.h Fri Jan 26 18:38:40 2007 +0000
+++ b/tools/ioemu/vl.h Sat Jan 27 13:32:27 2007 +0000
@@ -158,6 +158,9 @@ extern FILE *logfile;


#if defined(__i386__) || defined(__x86_64__)
+
+#define MAPCACHE
+
#if defined(__i386__)
#define MAX_MCACHE_SIZE 0x40000000 /* 1GB max for x86 */
#define MCACHE_BUCKET_SHIFT 16
@@ -174,6 +177,20 @@ struct map_cache {
};

uint8_t *qemu_map_cache(target_phys_addr_t phys_addr);
+void qemu_invalidate_map_cache(void);
+
+#include <pthread.h>
+extern pthread_mutex_t mapcache_mutex;
+#define mapcache_lock() pthread_mutex_lock(&mapcache_mutex)
+#define mapcache_unlock() pthread_mutex_unlock(&mapcache_mutex)
+
+#else
+
+#define qemu_invalidate_map_cache() ((void)0)
+
+#define mapcache_lock() ((void)0)
+#define mapcache_unlock() ((void)0)
+
#endif

extern int xc_handle;
diff -r 271ffb1c12eb -r d1710eb35385 unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
--- a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c Fri Jan 26 18:38:40 2007 +0000
+++ b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c Sat Jan 27 13:32:27 2007 +0000
@@ -214,6 +214,14 @@ static uint64_t get_callback_via(struct
#endif
}

+/* Invalidate foreign mappings (e.g., in qemu-based device model). */
+static uint16_t invlmap_port;
+void xen_invalidate_foreign_mappings(void)
+{
+ outb(0, invlmap_port);
+}
+EXPORT_SYMBOL(xen_invalidate_foreign_mappings);
+
static int __devinit platform_pci_init(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@@ -238,6 +246,8 @@ static int __devinit platform_pci_init(s
printk(KERN_WARNING DRV_NAME ":no resources found\n");
return -ENOENT;
}
+
+ invlmap_port = ioaddr;

if (request_mem_region(mmio_addr, mmio_len, DRV_NAME) == NULL)
{

_______________________________________________
Xen-changelog mailing list
Xen-changelog@lists.xensource.com
http://lists.xensource.com/xen-changelog