Suggested-by: Sean Christopherson <[email protected]>
Signed-off-by: Vitaly Kuznetsov <[email protected]>
---
arch/x86/kvm/vmx/nested.c | 34 ++++++++++++++++------------------
arch/x86/kvm/vmx/nested.h | 2 +-
arch/x86/kvm/vmx/vmx.c | 5 ++---
3 files changed, 19 insertions(+), 22 deletions(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 7d8cd0ebcc75..8cc2187b5556 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6549,8 +6549,13 @@ static u64 nested_vmx_calc_vmcs_enum_msr(void)
* bit in the high half is on if the corresponding bit in the control field
* may be on. See also vmx_control_verify().
*/
-void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
+void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps)
{
+ struct nested_vmx_msrs *msrs = &vmcs_conf->nested;
+
+ /* Take the allowed-1 bits from KVM's sanitized VMCS configuration. */
+ u32 ignore_high;
+
/*
* Note that as a general rule, the high half of the MSRs (bits in
* the control fields which may be 1) should be initialized by the
@@ -6567,11 +6572,11 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
*/
/* pin-based controls */
- rdmsr(MSR_IA32_VMX_PINBASED_CTLS,
- msrs->pinbased_ctls_low,
- msrs->pinbased_ctls_high);
+ rdmsr(MSR_IA32_VMX_PINBASED_CTLS, msrs->pinbased_ctls_low, ignore_high);
msrs->pinbased_ctls_low |=
PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
+
+ msrs->pinbased_ctls_high = vmcs_conf->pin_based_exec_ctrl;
msrs->pinbased_ctls_high &=
PIN_BASED_EXT_INTR_MASK |
PIN_BASED_NMI_EXITING |
@@ -6582,12 +6587,10 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
PIN_BASED_VMX_PREEMPTION_TIMER;
/* exit controls */
- rdmsr(MSR_IA32_VMX_EXIT_CTLS,
- msrs->exit_ctls_low,
- msrs->exit_ctls_high);
msrs->exit_ctls_low =
VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
+ msrs->exit_ctls_high = vmcs_conf->vmexit_ctrl;
msrs->exit_ctls_high &=
#ifdef CONFIG_X86_64
VM_EXIT_HOST_ADDR_SPACE_SIZE |
@@ -6603,11 +6606,10 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
msrs->exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS;
/* entry controls */
- rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
- msrs->entry_ctls_low,
- msrs->entry_ctls_high);
msrs->entry_ctls_low =
VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
+
+ msrs->entry_ctls_high = vmcs_conf->vmentry_ctrl;
msrs->entry_ctls_high &=
#ifdef CONFIG_X86_64
VM_ENTRY_IA32E_MODE |
@@ -6621,11 +6623,10 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
msrs->entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS;
/* cpu-based controls */
- rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
- msrs->procbased_ctls_low,
- msrs->procbased_ctls_high);
msrs->procbased_ctls_low =
CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
+
+ msrs->procbased_ctls_high = vmcs_conf->cpu_based_exec_ctrl;
msrs->procbased_ctls_high &=
CPU_BASED_INTR_WINDOW_EXITING |
CPU_BASED_NMI_WINDOW_EXITING | CPU_BASED_USE_TSC_OFFSETTING |
@@ -6659,12 +6660,9 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
* depend on CPUID bits, they are added later by
* vmx_vcpu_after_set_cpuid.
*/
- if (msrs->procbased_ctls_high & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
- rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
- msrs->secondary_ctls_low,
- msrs->secondary_ctls_high);
-
msrs->secondary_ctls_low = 0;
+
+ msrs->secondary_ctls_high = vmcs_conf->cpu_based_2nd_exec_ctrl;
msrs->secondary_ctls_high &=
SECONDARY_EXEC_DESC |
SECONDARY_EXEC_ENABLE_RDTSCP |
diff --git a/arch/x86/kvm/vmx/nested.h b/arch/x86/kvm/vmx/nested.h
index c92cea0b8ccc..fae047c6204b 100644
--- a/arch/x86/kvm/vmx/nested.h
+++ b/arch/x86/kvm/vmx/nested.h
@@ -17,7 +17,7 @@ enum nvmx_vmentry_status {
};
void vmx_leave_nested(struct kvm_vcpu *vcpu);
-void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps);
+void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps);
void nested_vmx_hardware_unsetup(void);
__init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *));
void nested_vmx_set_vmcs_shadowing_bitmap(void);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 7aab9225c4c3..37d5c5bc4cd2 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7368,7 +7368,7 @@ static int __init vmx_check_processor_compat(void)
if (setup_vmcs_config(&vmcs_conf, &vmx_cap) < 0)
return -EIO;
if (nested)
- nested_vmx_setup_ctls_msrs(&vmcs_conf.nested, vmx_cap.ept);
+ nested_vmx_setup_ctls_msrs(&vmcs_conf, vmx_cap.ept);
if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
smp_processor_id());
@@ -8330,8 +8330,7 @@ static __init int hardware_setup(void)
setup_default_sgx_lepubkeyhash();
if (nested) {
- nested_vmx_setup_ctls_msrs(&vmcs_config.nested,
- vmx_capability.ept);
+ nested_vmx_setup_ctls_msrs(&vmcs_config, vmx_capability.ept);
r = nested_vmx_hardware_setup(kvm_vmx_exit_handlers);
if (r)
--
2.35.3
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 4ce471284f28e5ab6d68e422f02ce1b1694e95ba ("[PATCH RFC v1 06/10] KVM: nVMX: Use sanitized allowed-1 bits for VMX control MSRs")
url: https://github.com/intel-lab-lkp/linux/commits/Vitaly-Kuznetsov/KVM-nVMX-Use-vmcs_config-for-setting-up-nested-VMX-MSRs/20220623-004653
base: https://git.kernel.org/cgit/virt/kvm/kvm.git queue
patch link: https://lore.kernel.org/kvm/[email protected]
in testcase: kvm-unit-tests
version: kvm-unit-tests-x86_64-8719e83-1_20220518
with following parameters:
ucode: 0x28
on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4790 v3 @ 3.60GHz with 6G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
please be noted we actually observed below three tests failed upon this commit
which could pass on parent:
fcae0968e65d1a13 4ce471284f28e5ab6d68e422f02
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
:6 100% 6:6 kvm-unit-tests.vmx_pf_invvpid_test.fail
:6 100% 6:6 kvm-unit-tests.vmx_pf_no_vpid_test.fail
:6 100% 6:6 kvm-unit-tests.vmx_pf_vpid_test.fail
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <[email protected]>
2022-07-02 06:51:47 ./run_tests.sh
...
[31mFAIL[0m vmx_pf_vpid_test
[31mFAIL[0m vmx_pf_invvpid_test
[31mFAIL[0m vmx_pf_no_vpid_test
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://01.org/lkp