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