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hv: vmx: add vpid support

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Enable VMX vpid ctrl and assign an unique vpid to each vcpu
so that VMX transitions are not required to invalidate any
linear mappings or combined mappings.

SDM Vol 3 - 28.3.3.3
If EPT is in use, the logical processor associates all mappings
it creates with the value of bits 51:12 of current EPTP.
If a VMM uses different EPTP values for different guests, it may
use the same VPID for those guests. Doing so cannot result in one
guest using translations that pertain to the other.

In our UOS, the trusty world and normal world are using different
EPTP. So we can use the same VPID for it.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Li, Fei1
2018-05-31 16:39:49 +08:00
committed by lijinxia
parent c34f72a0bc
commit 84f4cf3c1d
8 changed files with 96 additions and 0 deletions
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11
hypervisor/arch/x86/guest/vcpu.c
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@@ -83,6 +83,8 @@ int create_vcpu(int cpu_id, struct vm *vm, struct vcpu **rtn_vcpu_handle)
}
#endif
vcpu->arch_vcpu.vpid = allocate_vpid();
/* Allocate VMCS region for this VCPU */
vcpu->arch_vcpu.vmcs = alloc_page();
ASSERT(vcpu->arch_vcpu.vmcs != NULL, "");
@@ -145,6 +147,15 @@ int start_vcpu(struct vcpu *vcpu)
pr_info("VM %d Starting VCPU %d",
vcpu->vm->attr.id, vcpu->vcpu_id);
if (vcpu->arch_vcpu.vpid)
exec_vmwrite(VMX_VPID, vcpu->arch_vcpu.vpid);
/*
* A power-up or a reset invalidates all linear mappings,
* guest-physical mappings, and combined mappings
*/
flush_vpid_global();
/* Set vcpu launched */
vcpu->launched = true;