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| author | Sean Christopherson <seanjc@google.com> | 2023-07-21 23:18:43 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-08-04 01:37:14 +0300 |
| commit | 119b5cb4ffd0166f3e98e9ee042f5046f7744f28 (patch) | |
| tree | 06589a358bee13b5b6bae25c3ce159f191f71ea0 /arch/x86/kvm/vmx | |
| parent | 5e408396c60cd0f0b53a43713016b6d6af8d69e0 (diff) | |
| download | linux-119b5cb4ffd0166f3e98e9ee042f5046f7744f28.tar.xz | |
x86/reboot: KVM: Handle VMXOFF in KVM's reboot callback
Use KVM VMX's reboot/crash callback to do VMXOFF in an emergency instead
of manually and blindly doing VMXOFF. There's no need to attempt VMXOFF
if a hypervisor, i.e. KVM, isn't loaded/active, i.e. if the CPU can't
possibly be post-VMXON.
Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230721201859.2307736-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 661ba09685b8..df991f15baf4 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -725,7 +725,7 @@ static int vmx_set_guest_uret_msr(struct vcpu_vmx *vmx, return ret; } -static void crash_vmclear_local_loaded_vmcss(void) +static void vmx_emergency_disable(void) { int cpu = raw_smp_processor_id(); struct loaded_vmcs *v; @@ -733,6 +733,8 @@ static void crash_vmclear_local_loaded_vmcss(void) list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), loaded_vmcss_on_cpu_link) vmcs_clear(v->vmcs); + + __cpu_emergency_vmxoff(); } static void __loaded_vmcs_clear(void *arg) @@ -8571,7 +8573,7 @@ static void __vmx_exit(void) { allow_smaller_maxphyaddr = false; - cpu_emergency_unregister_virt_callback(crash_vmclear_local_loaded_vmcss); + cpu_emergency_unregister_virt_callback(vmx_emergency_disable); vmx_cleanup_l1d_flush(); } @@ -8619,7 +8621,7 @@ static int __init vmx_init(void) pi_init_cpu(cpu); } - cpu_emergency_register_virt_callback(crash_vmclear_local_loaded_vmcss); + cpu_emergency_register_virt_callback(vmx_emergency_disable); vmx_check_vmcs12_offsets(); |