lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

lguest: per-cpu run guest

Browse Source 
This patch makes the run_guest() routine use the lg_cpu struct.
This is required since in a smp guest environment, there's no
more the notion of "running the guest", but rather, it is "running the vcpu"

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Glauber de Oliveira Costa
2008-01-07 11:05:25 -02:00
committed by Rusty Russell
parent 4dcc53da49
commit d0953d42c3
4 changed files with 25 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/lguest/lguest_user.c
View File

@@ -55,11 +55,19 @@ static int user_send_irq(struct lguest *lg, const unsigned long __user *input)
static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o)
{
struct lguest *lg = file->private_data;
struct lg_cpu *cpu;
unsigned int cpu_id = *o;
/* You must write LHREQ_INITIALIZE first! */
if (!lg)
return -EINVAL;
/* Watch out for arbitrary vcpu indexes! */
if (cpu_id >= lg->nr_cpus)
return -EINVAL;
cpu = &lg->cpus[cpu_id];
/* If you're not the task which owns the Guest, go away. */
if (current != lg->tsk)
return -EPERM;
@@ -85,7 +93,7 @@ static ssize_t read(struct file *file, char __user *user, size_t size,loff_t*o)
lg->pending_notify = 0;
/* Run the Guest until something interesting happens. */
return run_guest(lg, (unsigned long __user *)user);
return run_guest(cpu, (unsigned long __user *)user);
}
static int lg_cpu_start(struct lg_cpu *cpu, unsigned id, unsigned long start_ip)
@@ -147,7 +155,7 @@ static int initialize(struct file *file, const unsigned long __user *input)
lg->pfn_limit = args[1];
/* This is the first cpu */
err = cpu_start(&lg->cpus[0], 0, args[3]);
err = lg_cpu_start(&lg->cpus[0], 0, args[3]);
if (err)
goto release_guest;