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KVM: VMX: Move nested hardware/vcpu {un}setup to helper functions

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Eventually this will allow us to move the nested VMX code out of vmx.c.
Note that this also effectively wraps @enable_shadow_vmcs with @nested
so that it too can be moved out of vmx.c.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2018-12-03 13:53:09 -08:00 committed by Paolo Bonzini
parent 89b0c9f583
commit 944c346453
1 changed files with 54 additions and 31 deletions
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85
arch/x86/kvm/vmx/vmx.c
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@ -4765,13 +4765,9 @@ static void ept_set_mmio_spte_mask(void)
}
#define VMX_XSS_EXIT_BITMAP 0
/*
* Sets up the vmcs for emulated real mode.
*/
static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
{
int i;
static void nested_vmx_vcpu_setup(void)
{
if (enable_shadow_vmcs) {
/*
* At vCPU creation, "VMWRITE to any supported field
@ -4782,6 +4778,18 @@ static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap));
vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmread_bitmap));
}
}
/*
* Sets up the vmcs for emulated real mode.
*/
static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
{
int i;
if (nested)
nested_vmx_vcpu_setup();
if (cpu_has_vmx_msr_bitmap())
vmcs_write64(MSR_BITMAP, __pa(vmx->vmcs01.msr_bitmap));
@ -6059,10 +6067,40 @@ static void vmx_enable_tdp(void)
kvm_enable_tdp();
}
static __exit void nested_vmx_hardware_unsetup(void)
{
int i;
if (enable_shadow_vmcs) {
for (i = 0; i < VMX_BITMAP_NR; i++)
free_page((unsigned long)vmx_bitmap[i]);
}
}
static __init int nested_vmx_hardware_setup(void)
{
int i;
if (enable_shadow_vmcs) {
for (i = 0; i < VMX_BITMAP_NR; i++) {
vmx_bitmap[i] = (unsigned long *)
__get_free_page(GFP_KERNEL);
if (!vmx_bitmap[i]) {
nested_vmx_hardware_unsetup();
return -ENOMEM;
}
}
init_vmcs_shadow_fields();
}
return 0;
}
static __init int hardware_setup(void)
{
unsigned long host_bndcfgs;
int r = -ENOMEM, i;
int r, i;
rdmsrl_safe(MSR_EFER, &host_efer);
@ -6186,16 +6224,6 @@ static __init int hardware_setup(void)
if (!cpu_has_vmx_shadow_vmcs() || !nested)
enable_shadow_vmcs = 0;
if (enable_shadow_vmcs) {
for (i = 0; i < VMX_BITMAP_NR; i++) {
vmx_bitmap[i] = (unsigned long *)
__get_free_page(GFP_KERNEL);
if (!vmx_bitmap[i])
goto out;
}
init_vmcs_shadow_fields();
}
kvm_set_posted_intr_wakeup_handler(wakeup_handler);
nested_vmx_setup_ctls_msrs(&vmcs_config.nested, vmx_capability.ept,
@ -6203,27 +6231,22 @@ static __init int hardware_setup(void)
kvm_mce_cap_supported |= MCG_LMCE_P;
if (nested) {
r = nested_vmx_hardware_setup();
if (r)
return r;
}
r = alloc_kvm_area();
if (r)
goto out;
return 0;
out:
if (enable_shadow_vmcs) {
for (i = 0; i < VMX_BITMAP_NR; i++)
free_page((unsigned long)vmx_bitmap[i]);
}
nested_vmx_hardware_unsetup();
return r;
}
static __exit void hardware_unsetup(void)
{
int i;
if (enable_shadow_vmcs) {
for (i = 0; i < VMX_BITMAP_NR; i++)
free_page((unsigned long)vmx_bitmap[i]);
}
if (nested)
nested_vmx_hardware_unsetup();
free_kvm_area();
}