#include <linux/uaccess.h>
#include <asm/irq_vectors.h>
#include <asm/io.h>
+#include <asm/thread_info.h>
#include <linux/init.h>
#include <linux/module.h>
if (!print_buffer[i]) {
ERROR("Cannot allocate print buffer for cpu %d\n",i);
deinit_print_buffers();
- return -1;
+ return -1;
}
memset(print_buffer[i],0,V3_PRINTK_BUF_SIZE);
}
// this function is used extensively throughout palacios and the linux
// module, both in places where interrupts are off and where they are on
// a GFP_KERNEL call, when done with interrupts off can lead to DEADLOCK
- if (irqs_disabled()) {
+ if (irqs_disabled() || in_atomic()) {
return palacios_alloc_extended(size,GFP_ATOMIC,-1);
} else {
return palacios_alloc_extended(size,GFP_KERNEL,-1);
/**
* Runs a function on the specified CPU.
*/
-static void
+void
palacios_xcall(
int cpu_id,
void (*fn)(void *arg),
* Creates a kernel thread.
*/
void *
-palacios_start_kernel_thread(
+palacios_create_and_start_kernel_thread(
int (*fn) (void * arg),
void * arg,
char * thread_name) {
wake_up_process(thread);
}
+
+/*
+ Convenience wrapper
+*/
+void *
+palacios_create_and_start_thread_on_cpu(int cpu_id,
+ int (*fn)(void * arg),
+ void * arg,
+ char * thread_name ) {
+
+ void *t = palacios_create_thread_on_cpu(cpu_id, fn, arg, thread_name);
+
+ if (t) {
+ palacios_start_thread(t);
+ }
+
+ return t;
+}
+
+
+
/**
* Rebind a kernel thread to the specified CPU
* The thread will be running on target CPU on return
void palacios_used_fpu(void)
{
- struct thread_info *cur = current_thread_info();
-
// We assume we are not preemptible here...
- cur->status |= TS_USEDFPU;
+#ifndef TS_USEDFPU
+ struct task_struct *tsk = current;
+ tsk->thread.fpu.has_fpu = 1;
+#else
+ struct thread_info *cur = current_thread_info();
+ cur->status |= TS_USEDFPU;
+#endif
clts();
// After this, FP Save should be handled by Linux if it
// switches to a different task and that task uses FPU
.print = palacios_print_scoped,
.allocate_pages = palacios_allocate_pages,
.free_pages = palacios_free_pages,
+ .vmalloc = palacios_valloc,
+ .vfree = palacios_vfree,
.malloc = palacios_alloc,
.free = palacios_free,
.vaddr_to_paddr = palacios_vaddr_to_paddr,
.hook_interrupt = palacios_hook_interrupt,
.ack_irq = palacios_ack_interrupt,
.get_cpu_khz = palacios_get_cpu_khz,
- .start_kernel_thread = palacios_start_kernel_thread,
+ .start_kernel_thread = palacios_create_and_start_kernel_thread,
.yield_cpu = palacios_yield_cpu,
.sleep_cpu = palacios_sleep_cpu,
.wakeup_cpu = palacios_wakeup_cpu,
.get_cpu = palacios_get_cpu,
.interrupt_cpu = palacios_interrupt_cpu,
.call_on_cpu = palacios_xcall,
- .create_thread_on_cpu = palacios_start_thread_on_cpu,
+ .create_thread_on_cpu = palacios_create_thread_on_cpu,
.start_thread = palacios_start_thread,
.move_thread_to_cpu = palacios_move_thread_to_cpu,
};