#include <linux/smp.h>
#include <linux/vmalloc.h>
+#include <asm/i387.h>
+
#include <palacios/vmm.h>
#include <palacios/vmm_host_events.h>
+
+#ifdef V3_CONFIG_HOST_LAZY_FPU_SWITCH
+#include <interfaces/vmm_lazy_fpu.h>
+#endif
+
#include "palacios.h"
#include "mm.h"
#include "memcheck.h"
#include "lockcheck.h"
-// The following can be used to track heap bugs
-// zero memory after allocation
-#define ALLOC_ZERO_MEM 0
-// pad allocations by this many bytes on both ends of block
+
+
+// The following can be used to track memory bugs
+// zero memory after allocation (now applies to valloc and page alloc as well)
+#define ALLOC_ZERO_MEM 1
+// pad allocations by this many bytes on both ends of block (heap only)
#define ALLOC_PAD 0
* Allocates a contiguous region of pages of the requested size.
* Returns the physical address of the first page in the region.
*/
-void *palacios_allocate_pages(int num_pages, unsigned int alignment) {
+void *palacios_allocate_pages(int num_pages, unsigned int alignment, int node_id, int constraints) {
void * pg_addr = NULL;
if (num_pages<=0) {
- ERROR("ALERT ALERT Attempt to allocate zero or fewer pages\n");
+ ERROR("ALERT ALERT Attempt to allocate zero or fewer pages (%d pages, alignment %d, node %d, constraints 0x%x)\n",num_pages, alignment, node_id, constraints);
return NULL;
}
- pg_addr = (void *)alloc_palacios_pgs(num_pages, alignment);
+ pg_addr = (void *)alloc_palacios_pgs(num_pages, alignment, node_id, constraints);
if (!pg_addr) {
- ERROR("ALERT ALERT Page allocation has FAILED Warning\n");
+ ERROR("ALERT ALERT Page allocation has FAILED Warning (%d pages, alignment %d, node %d, constraints 0x%x)\n",num_pages, alignment, node_id, constraints);
return NULL;
}
pg_allocs += num_pages;
+#if ALLOC_ZERO_MEM
+ memset(__va(pg_addr),0,num_pages*4096);
+#endif
+
MEMCHECK_ALLOC_PAGES(pg_addr,num_pages*4096);
return pg_addr;
*/
void palacios_free_pages(void * page_paddr, int num_pages) {
+ if (!page_paddr) {
+ ERROR("Ignoring free pages: 0x%p (0x%lx)for %d pages\n", page_paddr, (uintptr_t)page_paddr, num_pages);
+ dump_stack();
+ return;
+ }
pg_frees += num_pages;
free_palacios_pgs((uintptr_t)page_paddr, num_pages);
MEMCHECK_FREE_PAGES(page_paddr,num_pages*4096);
void *
-palacios_alloc_extended(unsigned int size, unsigned int flags) {
+palacios_alloc_extended(unsigned int size, unsigned int flags, int node) {
void * addr = NULL;
if (size==0) {
return NULL;
}
- addr = kmalloc(size+2*ALLOC_PAD, flags);
+ if (node==-1) {
+ addr = kmalloc(size+2*ALLOC_PAD, flags);
+ } else {
+ addr = kmalloc_node(size+2*ALLOC_PAD, flags, node);
+ }
- if (!addr) {
+ if (!addr || IS_ERR(addr)) {
ERROR("ALERT ALERT kmalloc has FAILED FAILED FAILED\n");
return NULL;
}
addr = vmalloc(size);
- if (!addr) {
+ if (!addr || IS_ERR(addr)) {
ERROR("ALERT ALERT vmalloc has FAILED FAILED FAILED\n");
return NULL;
}
vmallocs++;
+#if ALLOC_ZERO_MEM
+ memset(addr,0,size);
+#endif
+
MEMCHECK_VMALLOC(addr,size);
return addr;
void palacios_vfree(void *p)
{
+ if (!p) {
+ ERROR("Ignoring vfree: 0x%p\n",p);
+ dump_stack();
+ return;
+ }
vfree(p);
vfrees++;
MEMCHECK_VFREE(p);
// 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()) {
- return palacios_alloc_extended(size,GFP_ATOMIC);
+ return palacios_alloc_extended(size,GFP_ATOMIC,-1);
} else {
- return palacios_alloc_extended(size,GFP_KERNEL);
+ return palacios_alloc_extended(size,GFP_KERNEL,-1);
}
}
void * addr
)
{
+ if (!addr) {
+ ERROR("Ignoring free : 0x%p\n", addr);
+ dump_stack();
+ return;
+ }
frees++;
kfree(addr-ALLOC_PAD);
MEMCHECK_KFREE(addr-ALLOC_PAD);
allow_signal(SIGKILL);
*/
+#ifdef V3_CONFIG_HOST_LAZY_FPU_SWITCH
+ // We are a kernel thread that needs FPU save/restore state
+ // vcores definitely need this, all the other threads get it too,
+ // but they just won't use it
+ fpu_alloc(&(current->thread.fpu));
+#endif
ret = thread_info->fn(thread_info->arg);
-
INFO("Palacios Thread (%s) EXITING\n", thread_info->name);
palacios_free(thread_info);
// handle cleanup
+ // We rely on do_exit to free the fpu data
+ // since we could get switched at any point until the thread is done...
+
do_exit(ret);
-
+
return 0; // should not get here.
}
thread = kthread_create( lnx_thread_target, thread_info, thread_info->name );
- if (IS_ERR(thread)) {
+ if (!thread || IS_ERR(thread)) {
WARNING("Palacios error creating thread: %s\n", thread_info->name);
palacios_free(thread_info);
return NULL;
LOCKCHECK_UNLOCK_IRQRESTORE_POST(mutex,(unsigned long)flags);
}
+void palacios_used_fpu(void)
+{
+ struct thread_info *cur = current_thread_info();
+
+ // We assume we are not preemptible here...
+ cur->status |= TS_USEDFPU;
+ clts();
+ // After this, FP Save should be handled by Linux if it
+ // switches to a different task and that task uses FPU
+}
+
+inline int ists(void)
+{
+ return read_cr0() & X86_CR0_TS;
+
+}
+void palacios_need_fpu(void)
+{
+ // We assume we are not preemptible here...
+ if (ists()) {
+ // we have been switched back to from somewhere else...
+ // Do a restore now - this will also do a clts()
+ math_state_restore();
+ }
+}
+
+
/**
* Structure used by the Palacios hypervisor to interface with the host kernel.
*/
};
+#ifdef V3_CONFIG_HOST_LAZY_FPU_SWITCH
+// Note that this host interface is defined here since it's
+// intertwined with thread creation...
+static struct v3_lazy_fpu_iface palacios_fpu_hooks = {
+ .used_fpu = palacios_used_fpu,
+ .need_fpu = palacios_need_fpu
+};
+
+#endif
int palacios_vmm_init( char *options )
Init_V3(&palacios_os_hooks, cpu_mask, num_cpus, options);
+#ifdef V3_CONFIG_HOST_LAZY_FPU_SWITCH
+ V3_Init_Lazy_FPU(&palacios_fpu_hooks);
+#endif
+
return 0;
}