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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-07 11:05:25 -0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-01-30 22:50:06 +1100 |
| commit | d0953d42c3445a120299fac9ad70e672d77898e9 (patch) | |
| tree | a631abb2c154bec66cec05508423da705d02f35b /drivers/lguest/lguest_user.c | |
| parent | 4dcc53da49c2387078fe8ceb7a420d125e027fc6 (diff) | |
| download | kernel_samsung_smdk4412-d0953d42c3445a120299fac9ad70e672d77898e9.zip kernel_samsung_smdk4412-d0953d42c3445a120299fac9ad70e672d77898e9.tar.gz kernel_samsung_smdk4412-d0953d42c3445a120299fac9ad70e672d77898e9.tar.bz2 | |
lguest: per-cpu run guest
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>
Diffstat (limited to 'drivers/lguest/lguest_user.c')
| -rw-r--r-- | drivers/lguest/lguest_user.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c index c4bfe5a..9f0a443 100644 --- a/drivers/lguest/lguest_user.c +++ b/drivers/lguest/lguest_user.c @@ -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; |