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/******************************************************************************
* xc_private.c
*
* Helper functions for the rest of the library.
*/
#include "xc_private.h"
int init_pfn_mapper(domid_t domid)
{
int fd = open("/dev/mem", O_RDWR);
if ( fd >= 0 )
(void)ioctl(fd, _IO('M', 1), (unsigned long)domid);
return fd;
}
int close_pfn_mapper(int pm_handle)
{
return close(pm_handle);
}
void *map_pfn_writeable(int pm_handle, unsigned long pfn)
{
void *vaddr = mmap(NULL, PAGE_SIZE, PROT_READ|PROT_WRITE,
MAP_SHARED, pm_handle, pfn << PAGE_SHIFT);
if ( vaddr == MAP_FAILED )
return NULL;
return vaddr;
}
void *map_pfn_readonly(int pm_handle, unsigned long pfn)
{
void *vaddr = mmap(NULL, PAGE_SIZE, PROT_READ,
MAP_SHARED, pm_handle, pfn << PAGE_SHIFT);
if ( vaddr == MAP_FAILED )
return NULL;
return vaddr;
}
void unmap_pfn(int pm_handle, void *vaddr)
{
(void)munmap(vaddr, PAGE_SIZE);
}
/*******************/
void * mfn_mapper_map_batch(int xc_handle, domid_t dom, int prot,
unsigned long *arr, int num )
{
privcmd_mmapbatch_t ioctlx;
void *addr;
addr = mmap( NULL, num*PAGE_SIZE, prot, MAP_SHARED, xc_handle, 0 );
if (addr)
{
ioctlx.num=num;
ioctlx.dom=dom;
ioctlx.addr=(unsigned long)addr;
ioctlx.arr=arr;
if ( ioctl( xc_handle, IOCTL_PRIVCMD_MMAPBATCH, &ioctlx ) < 0 )
{
perror("XXXXXXXX");
munmap(addr, num*PAGE_SIZE);
return 0;
}
}
return addr;
}
/*******************/
void * mfn_mapper_map_single(int xc_handle, domid_t dom,
int size, int prot,
unsigned long mfn )
{
privcmd_mmap_t ioctlx;
privcmd_mmap_entry_t entry;
void *addr;
addr = mmap( NULL, size, prot, MAP_SHARED, xc_handle, 0 );
if (addr)
{
ioctlx.num=1;
ioctlx.dom=dom;
ioctlx.entry=&entry;
entry.va=(unsigned long) addr;
entry.mfn=mfn;
entry.npages=(size+PAGE_SIZE-1)>>PAGE_SHIFT;
if ( ioctl( xc_handle, IOCTL_PRIVCMD_MMAP, &ioctlx ) <0 )
{
munmap(addr, size);
return 0;
}
}
return addr;
}
/*******************/
/* NB: arr must be mlock'ed */
int get_pfn_type_batch(int xc_handle,
u32 dom, int num, unsigned long *arr)
{
dom0_op_t op;
op.cmd = DOM0_GETPAGEFRAMEINFO2;
op.u.getpageframeinfo2.domain = (domid_t)dom;
op.u.getpageframeinfo2.num = num;
op.u.getpageframeinfo2.array = arr;
return do_dom0_op(xc_handle, &op);
}
#define GETPFN_ERR (~0U)
unsigned int get_pfn_type(int xc_handle,
unsigned long mfn,
u32 dom)
{
dom0_op_t op;
op.cmd = DOM0_GETPAGEFRAMEINFO;
op.u.getpageframeinfo.pfn = mfn;
op.u.getpageframeinfo.domain = (domid_t)dom;
if ( do_dom0_op(xc_handle, &op) < 0 )
{
PERROR("Unexpected failure when getting page frame info!");
return GETPFN_ERR;
}
return op.u.getpageframeinfo.type;
}
/*******************/
#define FIRST_MMU_UPDATE 1
static int flush_mmu_updates(int xc_handle, mmu_t *mmu)
{
int err = 0;
privcmd_hypercall_t hypercall;
if ( mmu->idx == FIRST_MMU_UPDATE )
return 0;
/* The first two requests set the correct subject domain (PTS and GPS). */
mmu->updates[0].val = (unsigned long)(mmu->subject<<16) & ~0xFFFFUL;
mmu->updates[0].ptr = (unsigned long)(mmu->subject<< 0) & ~0xFFFFUL;
mmu->updates[0].ptr |= MMU_EXTENDED_COMMAND;
mmu->updates[0].val |= MMUEXT_SET_SUBJECTDOM | SET_PAGETABLE_SUBJECTDOM;
hypercall.op = __HYPERVISOR_mmu_update;
hypercall.arg[0] = (unsigned long)mmu->updates;
hypercall.arg[1] = (unsigned long)mmu->idx;
hypercall.arg[2] = 0;
if ( mlock(mmu->updates, sizeof(mmu->updates)) != 0 )
{
PERROR("Could not lock pagetable update array");
err = 1;
goto out;
}
if ( do_xen_hypercall(xc_handle, &hypercall) < 0 )
{
ERROR("Failure when submitting mmu updates");
err = 1;
}
mmu->idx = FIRST_MMU_UPDATE;
(void)munlock(mmu->updates, sizeof(mmu->updates));
out:
return err;
}
mmu_t *init_mmu_updates(int xc_handle, domid_t dom)
{
mmu_t *mmu = malloc(sizeof(mmu_t));
if ( mmu == NULL )
return mmu;
mmu->idx = FIRST_MMU_UPDATE;
mmu->subject = dom;
return mmu;
}
int add_mmu_update(int xc_handle, mmu_t *mmu,
unsigned long ptr, unsigned long val)
{
mmu->updates[mmu->idx].ptr = ptr;
mmu->updates[mmu->idx].val = val;
if ( ++mmu->idx == MAX_MMU_UPDATES )
return flush_mmu_updates(xc_handle, mmu);
return 0;
}
int finish_mmu_updates(int xc_handle, mmu_t *mmu)
{
return flush_mmu_updates(xc_handle, mmu);
}
long long xc_domain_get_cpu_usage( int xc_handle, domid_t domid )
{
dom0_op_t op;
op.cmd = DOM0_GETDOMAININFO;
op.u.getdomaininfo.domain = (domid_t)domid;
op.u.getdomaininfo.ctxt = NULL;
if ( (do_dom0_op(xc_handle, &op) < 0) ||
((u32)op.u.getdomaininfo.domain != domid) )
{
PERROR("Could not get info on domain");
return -1;
}
return op.u.getdomaininfo.cpu_time;
}
/* This is shared between save and restore, and may generally be useful. */
unsigned long csum_page (void * page)
{
int i;
unsigned long *p = page;
unsigned long long sum=0;
for ( i = 0; i < (PAGE_SIZE/sizeof(unsigned long)); i++ )
sum += p[i];
return sum ^ (sum>>32);
}
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