Remove old lguest I/O infrrasructure.

This patch gets rid of the old lguest host I/O infrastructure and
replaces it with a single hypercall "LHCALL_NOTIFY" which takes an
address.

The main change is the removal of io.c: that mainly did inter-guest
I/O, which virtio doesn't yet support.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 1 insertions, 26 deletions

diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index e4845d7f0688..4d45b7036e82 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -5,7 +5,6 @@
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/stringify.h>
-#include <linux/futex.h>
 #include <linux/lguest.h>
 #include <linux/lguest_launcher.h>
 #include <linux/wait.h>
@@ -17,17 +16,6 @@
 void free_pagetables(void);
 int init_pagetables(struct page **switcher_page, unsigned int pages);
 
-struct lguest_dma_info
-{
-        struct list_head list;
-        union futex_key key;
-        unsigned long dmas;
-        struct lguest *owner;
-        u16 next_dma;
-        u16 num_dmas;
-        u8 interrupt;   /* 0 when not registered */
-};
-
 struct pgdir
 {
         unsigned long gpgdir;
@@ -90,15 +78,11 @@ struct lguest
         struct task_struct *wake;
 
         unsigned long noirq_start, noirq_end;
-        int dma_is_pending;
-        unsigned long pending_dma; /* struct lguest_dma */
-        unsigned long pending_key; /* address they're sending to */
+        unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
 
         unsigned int stack_pages;
         u32 tsc_khz;
 
-        struct lguest_dma_info dma[LGUEST_MAX_DMA];
-
         /* Dead? */
         const char *dead;
 
@@ -184,15 +168,6 @@ extern char start_switcher_text[], end_switcher_text[], switch_to_guest[];
 int lguest_device_init(void);
 void lguest_device_remove(void);
 
-/* io.c: */
-void lguest_io_init(void);
-int bind_dma(struct lguest *lg,
-             unsigned long key, unsigned long udma, u16 numdmas, u8 interrupt);
-void send_dma(struct lguest *info, unsigned long key, unsigned long udma);
-void release_all_dma(struct lguest *lg);
-unsigned long get_dma_buffer(struct lguest *lg, unsigned long key,
-                             unsigned long *interrupt);
-
 /* hypercalls.c: */
 void do_hypercalls(struct lguest *lg);
 void write_timestamp(struct lguest *lg);