On 12/10/2009 08:38 PM, [email protected] wrote:
+
+
struct __attribute__ ((__packed__)) level_state {
/* Has the level1 guest done vmclear? */
bool vmclear;
+
+ u64 io_bitmap_a;
+ u64 io_bitmap_b;
+ u64 msr_bitmap;
+
+ bool first_launch;
};
Please keep things naturally aligned.
/*
@@ -122,6 +255,8 @@ struct nested_vmx {
gpa_t current_vmptr;
/* Level 1 state for switching to level 2 and back */
struct level_state *l1_state;
+ /* Level 1 shadow vmcs for switching to level 2 and back */
+ struct shadow_vmcs *l1_shadow_vmcs;
/* list of vmcs for each l2 guest created by l1 */
struct list_head l2_vmcs_list;
/* l2 page corresponding to the current vmcs set by l1 */
@@ -187,10 +322,7 @@ static struct page *nested_get_page(struct kvm_vcpu *vcpu,
{
struct page *vmcs_page = NULL;
- down_read(¤t->mm->mmap_sem);
vmcs_page = gfn_to_page(vcpu->kvm, vmcs_addr>> PAGE_SHIFT);
- up_read(¤t->mm->mmap_sem);
Fold this into the patch that introduced the problem.
-
if (is_error_page(vmcs_page)) {
printk(KERN_ERR "%s error allocating page 0x%llx\n",
__func__, vmcs_addr);
@@ -832,13 +964,14 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
u8 error;
-
per_cpu(current_vmcs, cpu) = vmx->vmcs;
+
Please avoid pointless whitespace changes.
asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
: "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
: "cc");
+
if (error)
- printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
+ printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n",
vmx->vmcs, phys_addr);
Fold.
+
static int create_l1_state(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -1441,10 +1587,75 @@ static int create_l1_state(struct kvm_vcpu *vcpu)
} else
return 0;
+ vmx->nested.l1_shadow_vmcs = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!vmx->nested.l1_shadow_vmcs) {
+ printk(KERN_INFO "%s could not allocate memory for l1_shadow
vmcs\n",
+ __func__);
+ kfree(vmx->nested.l1_state);
+ return -ENOMEM;
+ }
+
INIT_LIST_HEAD(&(vmx->nested.l2_vmcs_list));
return 0;
}
+static struct vmcs *alloc_vmcs(void);
+int create_l2_state(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ struct vmcs *l2_vmcs;
+
+ if (!nested_map_current(vcpu)) {
+ printk(KERN_ERR "%s error mapping level 2 page", __func__);
+ return -ENOMEM;
+ }
+
+ l2_vmcs = nested_get_current_vmcs(vcpu);
+ if (!l2_vmcs) {
+ struct nested_vmcs_list *new_l2_guest =
+ (struct nested_vmcs_list *)
+ kmalloc(sizeof(struct nested_vmcs_list), GFP_KERNEL);
+
+ if (!new_l2_guest) {
+ printk(KERN_ERR "%s error could not allocate memory for a
new l2 guest list item",
+ __func__);
+ nested_unmap_current(vcpu);
+ return -ENOMEM;
+ }
Can the list grow without bounds?
+
+ l2_vmcs = alloc_vmcs();
+
+ if (!l2_vmcs) {
+ printk(KERN_ERR "%s error could not allocate memory for
l2_vmcs",
+ __func__);
+ kfree(new_l2_guest);
+ nested_unmap_current(vcpu);
+ return -ENOMEM;
+ }
+
+ new_l2_guest->vmcs_addr = vmx->nested.current_vmptr;
+ new_l2_guest->l2_vmcs = l2_vmcs;
+ list_add(&(new_l2_guest->list),&(vmx->nested.l2_vmcs_list));
+ }
+
+ if (cpu_has_vmx_msr_bitmap())
+ vmx->nested.current_l2_page->l2_state.msr_bitmap =
+ vmcs_read64(MSR_BITMAP);
+ else
+ vmx->nested.current_l2_page->l2_state.msr_bitmap = 0;
+
+ vmx->nested.current_l2_page->l2_state.io_bitmap_a =
+ vmcs_read64(IO_BITMAP_A);
+ vmx->nested.current_l2_page->l2_state.io_bitmap_b =
+ vmcs_read64(IO_BITMAP_B);
Don't understand why these reads are needed.
+
+ vmx->nested.current_l2_page->l2_state.first_launch = true;
+
+ nested_unmap_current(vcpu);
+
+ return 0;
+}
+
@@ -3633,8 +3849,9 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
return 1;
}
- if (create_l1_state(vcpu)) {
- printk(KERN_ERR "%s create_l1_state failed\n", __func__);
+ r = create_l1_state(vcpu);
+ if (r) {
+ printk(KERN_ERR "%s create_l1_state failed: %d\n", __func__, r);
Move this to the original patch.
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
@@ -3645,6 +3862,63 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
return 1;
}
+static int handle_vmptrld(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ u64 guest_vmcs_addr;
+ gva_t vmcs_gva;
+ unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
+ u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
+ int r = 0;
+
+ if (!nested_vmx_check_permission(vcpu))
+ return 1;
+
+ vmcs_gva = get_vmx_mem_address(vcpu, exit_qualification,
+ vmx_instruction_info);
+
+ if (read_guest_vmcs_gpa(vcpu, vmcs_gva,&guest_vmcs_addr))
+ return 1;
+
+ if (vmx->nested.current_vmptr != guest_vmcs_addr) {
+ vmx->nested.current_vmptr = guest_vmcs_addr;
+ r = create_l2_state(vcpu);
+ if (r) {
+ printk(KERN_ERR "%s create_l2_state failed: %d\n",
+ __func__, r);
+ return 1;
+ }
+ }
+
+ clear_rflags_cf_zf(vcpu);
+ skip_emulated_instruction(vcpu);
+ return 1;
No set_rflags() on error?
--
error compiling committee.c: too many arguments to function
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