UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

KVM: VMX: fix read/write sizes of VMCS fields 

In theory this should have broken EPT on 32-bit kernels (due to
reading the high part of natural-width field GUEST_CR3).  Not sure
if no one noticed or the processor behaves differently from the
documentation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-12-03 15:49:56 +01:00
parent 0bcf261cc8
commit f353105463
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/kvm/vmx.c
View File

@ -4868,7 +4868,7 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
seg_setup(VCPU_SREG_CS);
vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
vmcs_write32(GUEST_CS_BASE, 0xffff0000);
vmcs_writel(GUEST_CS_BASE, 0xffff0000ul);
seg_setup(VCPU_SREG_DS);
seg_setup(VCPU_SREG_ES);
@ -4904,7 +4904,7 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, 0);
setup_msrs(vmx);
@ -7893,7 +7893,7 @@ static void dump_vmcs(void)
u32 pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
u32 secondary_exec_control = 0;
unsigned long cr4 = vmcs_readl(GUEST_CR4);
u64 efer = vmcs_readl(GUEST_IA32_EFER);
u64 efer = vmcs_read64(GUEST_IA32_EFER);
int i, n;
if (cpu_has_secondary_exec_ctrls())
@ -10159,7 +10159,7 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
* Additionally, restore L2's PDPTR to vmcs12.
*/
if (enable_ept) {
vmcs12->guest_cr3 = vmcs_read64(GUEST_CR3);
vmcs12->guest_cr3 = vmcs_readl(GUEST_CR3);
vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0);
vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1);
vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2);