search for: map_zeroed_pages

...num_pages) -{ - static unsigned long top = LGUEST_GUEST_TOP; - struct lguest_device_desc *desc; - - desc = malloc(sizeof(*desc)); - desc->type = type; - desc->num_pages = num_pages; - desc->features = features; - desc->status = 0; - if (num_pages) { - top -= num_pages*getpagesize(); - map_zeroed_pages(top, num_pages); - desc->pfn = top / getpagesize(); - } else - desc->pfn = 0; - return desc; +static struct lguest_device_desc * +new_dev_desc(struct lguest_device_desc *descs, + u16 type, u16 features, u16 num_pages) +{ + unsigned int i; + + for (i = 0; i < LGUEST_MAX_DEVICES; i++)...

...num_pages) -{ - static unsigned long top = LGUEST_GUEST_TOP; - struct lguest_device_desc *desc; - - desc = malloc(sizeof(*desc)); - desc->type = type; - desc->num_pages = num_pages; - desc->features = features; - desc->status = 0; - if (num_pages) { - top -= num_pages*getpagesize(); - map_zeroed_pages(top, num_pages); - desc->pfn = top / getpagesize(); - } else - desc->pfn = 0; - return desc; +static struct lguest_device_desc * +new_dev_desc(struct lguest_device_desc *descs, + u16 type, u16 features, u16 num_pages) +{ + unsigned int i; + + for (i = 0; i < LGUEST_MAX_DEVICES; i++)...

Hi all, Just finished my prototype of inter-guest virtio, using networking as an example. Each guest mmaps the other's address space and uses a FIFO for notifications. There are two issues with this approach. The first is that neither guest can change its mappings. See patch 1. The second is that our feature configuration is "host presents, guest chooses" which breaks

Hi all, Just finished my prototype of inter-guest virtio, using networking as an example. Each guest mmaps the other's address space and uses a FIFO for notifications. There are two issues with this approach. The first is that neither guest can change its mappings. See patch 1. The second is that our feature configuration is "host presents, guest chooses" which breaks

...truct iovec *iov, + unsigned int num, struct device *me); + + /* Device-specific data. */ + void *priv; +}; + +static int open_or_die(const char *name, int flags) +{ + int fd = open(name, flags); + if (fd < 0) + err(1, "Failed to open %s", name); + return fd; +} + +static void *map_zeroed_pages(unsigned long addr, unsigned int num) +{ + static int fd = -1; + + if (fd == -1) + fd = open_or_die("/dev/zero", O_RDONLY); + + if (mmap((void *)addr, getpagesize() * num, + PROT_READ|PROT_WRITE|PROT_EXEC, MAP_FIXED|MAP_PRIVATE, fd, 0) + != (void *)addr) + err(1, "Mmaping %u...

...truct iovec *iov, + unsigned int num, struct device *me); + + /* Device-specific data. */ + void *priv; +}; + +static int open_or_die(const char *name, int flags) +{ + int fd = open(name, flags); + if (fd < 0) + err(1, "Failed to open %s", name); + return fd; +} + +static void *map_zeroed_pages(unsigned long addr, unsigned int num) +{ + static int fd = -1; + + if (fd == -1) + fd = open_or_die("/dev/zero", O_RDONLY); + + if (mmap((void *)addr, getpagesize() * num, + PROT_READ|PROT_WRITE|PROT_EXEC, MAP_FIXED|MAP_PRIVATE, fd, 0) + != (void *)addr) + err(1, "Mmaping %u...

Andrew did a great job of merging in the PDA->percpu changes and lguest code for 2.6.21-mm1, but the load_gdt is now unnecessary. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 4 ---- 1 file changed, 4 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@

Andrew did a great job of merging in the PDA->percpu changes and lguest code for 2.6.21-mm1, but the load_gdt is now unnecessary. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- drivers/lguest/lguest.c | 4 ---- 1 file changed, 4 deletions(-) =================================================================== --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c