static asmlinkage void
do_write_msr_sub (void *arg)
{
struct msrarg *p;
p = arg;
asm_wrmsr64 (p->msrindex, *p->msrdata);
}
void
savemsr_load (struct savemsr *p)
{
int i;
for (i = 0; i < NUM_OF_SAVEMSR_DATA; i++) {
if (p->data[i].exist)
asm_wrmsr64 (savemsr_index[i], p->data[i].msrdata);
}
}
static u64
get_ia32_bios_sign_id (void)
{
u64 rev;
u32 a, b, c, d;
asm_wrmsr64 (MSR_IA32_BIOS_SIGN_ID, 0);
asm_cpuid (1, 0, &a, &b, &c, &d);
asm_rdmsr64 (MSR_IA32_BIOS_SIGN_ID, &rev);
return rev;
}
void
svm_init (void)
{
u64 p;
u64 tmp;
void *v;
ulong efer;
asm_rdmsr (MSR_IA32_EFER, &efer);
efer |= MSR_IA32_EFER_SVME_BIT;
asm_wrmsr (MSR_IA32_EFER, efer);
asm_rdmsr64 (MSR_AMD_VM_CR, &tmp);
tmp |= MSR_AMD_VM_CR_DIS_A20M_BIT;
asm_wrmsr64 (MSR_AMD_VM_CR, tmp);
/* FIXME: size of a host state area is undocumented */
alloc_page (&v, &p);
currentcpu->svm.hsave = v;
currentcpu->svm.hsave_phys = p;
asm_wrmsr64 (MSR_AMD_VM_HSAVE_PA, p);
alloc_page (&v, &p);
memset (v, 0, PAGESIZE);
currentcpu->svm.vmcbhost = v;
currentcpu->svm.vmcbhost_phys = p;
}
