37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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#include "capabilities.h"
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#include "vmx_onhyperv.h"
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DEFINE_STATIC_KEY_FALSE(__kvm_is_using_evmcs);
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/*
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* KVM on Hyper-V always uses the latest known eVMCSv1 revision, the assumption
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* is: in case a feature has corresponding fields in eVMCS described and it was
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* exposed in VMX feature MSRs, KVM is free to use it. Warn if KVM meets a
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* feature which has no corresponding eVMCS field, this likely means that KVM
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* needs to be updated.
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*/
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#define evmcs_check_vmcs_conf(field, ctrl) \
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do { \
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typeof(vmcs_conf->field) unsupported; \
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\
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unsupported = vmcs_conf->field & ~EVMCS1_SUPPORTED_ ## ctrl; \
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if (unsupported) { \
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pr_warn_once(#field " unsupported with eVMCS: 0x%llx\n",\
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(u64)unsupported); \
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vmcs_conf->field &= EVMCS1_SUPPORTED_ ## ctrl; \
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} \
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} \
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while (0)
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void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
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{
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evmcs_check_vmcs_conf(cpu_based_exec_ctrl, EXEC_CTRL);
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evmcs_check_vmcs_conf(pin_based_exec_ctrl, PINCTRL);
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evmcs_check_vmcs_conf(cpu_based_2nd_exec_ctrl, 2NDEXEC);
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evmcs_check_vmcs_conf(cpu_based_3rd_exec_ctrl, 3RDEXEC);
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evmcs_check_vmcs_conf(vmentry_ctrl, VMENTRY_CTRL);
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evmcs_check_vmcs_conf(vmexit_ctrl, VMEXIT_CTRL);
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}
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