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Remove old lguest I/O infrrasructure.

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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>
This commit is contained in:
Rusty Russell
2007-10-22 11:24:10 +10:00
parent 0ca49ca946
commit 15045275c3
8 changed files with 21 additions and 752 deletions
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27
drivers/lguest/lg.h
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@@ -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);