[v1,03/23] KVM: VMX: Add support for the secondary VM exit controls

Message ID	20231108183003.5981-4-xin3.li@intel.com (mailing list archive)
State	New
Headers	show Return-Path: <linux-kselftest-owner@vger.kernel.org> From: Xin Li <xin3.li@intel.com> To: kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, vkuznets@redhat.com, peterz@infradead.org, ravi.v.shankar@intel.com Subject: [PATCH v1 03/23] KVM: VMX: Add support for the secondary VM exit controls Date: Wed, 8 Nov 2023 10:29:43 -0800 Message-ID: <20231108183003.5981-4-xin3.li@intel.com> In-Reply-To: <20231108183003.5981-1-xin3.li@intel.com> References: <20231108183003.5981-1-xin3.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Enable FRED with KVM VMX \| expand [v1,00/23] Enable FRED with KVM VMX [v1,01/23] KVM: VMX: Cleanup VMX basic information defines and usages [v1,02/23] KVM: VMX: Cleanup VMX misc information defines and usages [v1,03/23] KVM: VMX: Add support for the secondary VM exit controls [v1,04/23] KVM: x86: Mark CR4.FRED as not reserved [v1,05/23] KVM: VMX: Initialize FRED VM entry/exit controls in vmcs_config [v1,06/23] KVM: VMX: Defer enabling FRED MSRs save/load until after set CPUID [v1,07/23] KVM: VMX: Disable intercepting FRED MSRs [v1,08/23] KVM: VMX: Initialize VMCS FRED fields [v1,09/23] KVM: VMX: Switch FRED RSP0 between host and guest [v1,10/23] KVM: VMX: Add support for FRED context save/restore [v1,11/23] KVM: x86: Add kvm_is_fred_enabled() [v1,12/23] KVM: VMX: Handle FRED event data [v1,13/23] KVM: VMX: Handle VMX nested exception for FRED [v1,14/23] KVM: VMX: Dump FRED context in dump_vmcs() [v1,15/23] KVM: nVMX: Add support for the secondary VM exit controls [v1,16/23] KVM: nVMX: Add FRED VMCS fields [v1,17/23] KVM: nVMX: Add support for VMX FRED controls [v1,18/23] KVM: nVMX: Add VMCS FRED states checking [v1,19/23] KVM: x86: Allow FRED/LKGS/WRMSRNS to be exposed to guests [v1,20/23] KVM: selftests: Add FRED VMCS fields to evmcs [v1,21/23] KVM: selftests: Run debug_regs test with FRED enabled [v1,22/23] KVM: selftests: Add a new VM guest mode to run user level code [v1,23/23] KVM: selftests: Add fred exception tests

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index d7d4eace5dae..c95ed288aa5d 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -1109,6 +1109,7 @@ #define MSR_IA32_VMX_TRUE_ENTRY_CTLS 0x00000490 #define MSR_IA32_VMX_VMFUNC 0x00000491 #define MSR_IA32_VMX_PROCBASED_CTLS3 0x00000492 +#define MSR_IA32_VMX_EXIT_CTLS2 0x00000493 /* Resctrl MSRs: */ /* - Intel: */ diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 5771c5751e7e..4d4177ec802c 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -105,6 +105,7 @@ #define VM_EXIT_CLEAR_BNDCFGS 0x00800000 #define VM_EXIT_PT_CONCEAL_PIP 0x01000000 #define VM_EXIT_CLEAR_IA32_RTIT_CTL 0x02000000 +#define VM_EXIT_ACTIVATE_SECONDARY_CONTROLS 0x80000000 #define VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR 0x00036dff @@ -247,6 +248,8 @@ enum vmcs_field { TERTIARY_VM_EXEC_CONTROL_HIGH = 0x00002035, PID_POINTER_TABLE = 0x00002042, PID_POINTER_TABLE_HIGH = 0x00002043, + SECONDARY_VM_EXIT_CONTROLS = 0x00002044, + SECONDARY_VM_EXIT_CONTROLS_HIGH = 0x00002045, GUEST_PHYSICAL_ADDRESS = 0x00002400, GUEST_PHYSICAL_ADDRESS_HIGH = 0x00002401, VMCS_LINK_POINTER = 0x00002800, diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h index cb6588238f46..e8f3ad0f79ee 100644 --- a/arch/x86/kvm/vmx/capabilities.h +++ b/arch/x86/kvm/vmx/capabilities.h @@ -59,8 +59,9 @@ struct vmcs_config { u32 cpu_based_exec_ctrl; u32 cpu_based_2nd_exec_ctrl; u64 cpu_based_3rd_exec_ctrl; - u32 vmexit_ctrl; u32 vmentry_ctrl; + u32 vmexit_ctrl; + u64 secondary_vmexit_ctrl; u64 misc; struct nested_vmx_msrs nested; }; @@ -136,6 +137,12 @@ static inline bool cpu_has_tertiary_exec_ctrls(void) CPU_BASED_ACTIVATE_TERTIARY_CONTROLS; } +static inline bool cpu_has_secondary_vmexit_ctrls(void) +{ + return vmcs_config.vmexit_ctrl & + VM_EXIT_ACTIVATE_SECONDARY_CONTROLS; +} + static inline bool cpu_has_vmx_virtualize_apic_accesses(void) { return vmcs_config.cpu_based_2nd_exec_ctrl & diff --git a/arch/x86/kvm/vmx/vmcs.h b/arch/x86/kvm/vmx/vmcs.h index 7c1996b433e2..7d45a6504200 100644 --- a/arch/x86/kvm/vmx/vmcs.h +++ b/arch/x86/kvm/vmx/vmcs.h @@ -47,6 +47,7 @@ struct vmcs_host_state { struct vmcs_controls_shadow { u32 vm_entry; u32 vm_exit; + u64 secondary_vm_exit; u32 pin; u32 exec; u32 secondary_exec; diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 396a806bf2b2..df769207cbe0 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2574,6 +2574,7 @@ static int setup_vmcs_config(struct vmcs_config *vmcs_conf, u32 _cpu_based_2nd_exec_control = 0; u64 _cpu_based_3rd_exec_control = 0; u32 _vmexit_control = 0; + u64 _secondary_vmexit_control = 0; u32 _vmentry_control = 0; u64 basic_msr; int i; @@ -2693,6 +2694,11 @@ static int setup_vmcs_config(struct vmcs_config *vmcs_conf, _vmexit_control &= ~x_ctrl; } + if (_vmexit_control & VM_EXIT_ACTIVATE_SECONDARY_CONTROLS) + _secondary_vmexit_control = + adjust_vmx_controls64(KVM_OPTIONAL_VMX_SECONDARY_VM_EXIT_CONTROLS, + MSR_IA32_VMX_EXIT_CTLS2); + rdmsrl(MSR_IA32_VMX_BASIC, basic_msr); /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ @@ -2714,8 +2720,9 @@ static int setup_vmcs_config(struct vmcs_config *vmcs_conf, vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; vmcs_conf->cpu_based_3rd_exec_ctrl = _cpu_based_3rd_exec_control; - vmcs_conf->vmexit_ctrl = _vmexit_control; vmcs_conf->vmentry_ctrl = _vmentry_control; + vmcs_conf->vmexit_ctrl = _vmexit_control; + vmcs_conf->secondary_vmexit_ctrl = _secondary_vmexit_control; rdmsrl(MSR_IA32_VMX_MISC, vmcs_conf->misc); @@ -4420,9 +4427,21 @@ static u32 vmx_vmexit_ctrl(void) if (cpu_has_perf_global_ctrl_bug()) vmexit_ctrl &= ~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL; - /* Loading of EFER and PERF_GLOBAL_CTRL are toggled dynamically */ + /* + * The following features are toggled dynamically: + * - Loading of PERF_GLOBAL_CTRL + * - Loading of EFER + * - Activating of SECONDARY_CONTROLS + */ return vmexit_ctrl & - ~(VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | VM_EXIT_LOAD_IA32_EFER); + ~(VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | + VM_EXIT_LOAD_IA32_EFER | + VM_EXIT_ACTIVATE_SECONDARY_CONTROLS); +} + +static u64 vmx_secondary_vmexit_ctrl(void) +{ + return vmcs_config.secondary_vmexit_ctrl; } static void vmx_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) @@ -4770,6 +4789,9 @@ static void init_vmcs(struct vcpu_vmx *vmx) vm_exit_controls_set(vmx, vmx_vmexit_ctrl()); + if (cpu_has_secondary_vmexit_ctrls()) + secondary_vm_exit_controls_set(vmx, vmx_secondary_vmexit_ctrl()); + /* 22.2.1, 20.8.1 */ vm_entry_controls_set(vmx, vmx_vmentry_ctrl()); diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index c2130d2c8e24..99a0f6783085 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -502,7 +502,11 @@ static inline u8 vmx_get_rvi(void) VM_EXIT_LOAD_IA32_EFER | \ VM_EXIT_CLEAR_BNDCFGS | \ VM_EXIT_PT_CONCEAL_PIP | \ - VM_EXIT_CLEAR_IA32_RTIT_CTL) + VM_EXIT_CLEAR_IA32_RTIT_CTL | \ + VM_EXIT_ACTIVATE_SECONDARY_CONTROLS) + +#define KVM_REQUIRED_VMX_SECONDARY_VM_EXIT_CONTROLS (0) +#define KVM_OPTIONAL_VMX_SECONDARY_VM_EXIT_CONTROLS (0) #define KVM_REQUIRED_VMX_PIN_BASED_VM_EXEC_CONTROL \ (PIN_BASED_EXT_INTR_MASK | \ @@ -606,6 +610,7 @@ static __always_inline void lname##_controls_clearbit(struct vcpu_vmx *vmx, u##b } BUILD_CONTROLS_SHADOW(vm_entry, VM_ENTRY_CONTROLS, 32) BUILD_CONTROLS_SHADOW(vm_exit, VM_EXIT_CONTROLS, 32) +BUILD_CONTROLS_SHADOW(secondary_vm_exit, SECONDARY_VM_EXIT_CONTROLS, 64) BUILD_CONTROLS_SHADOW(pin, PIN_BASED_VM_EXEC_CONTROL, 32) BUILD_CONTROLS_SHADOW(exec, CPU_BASED_VM_EXEC_CONTROL, 32) BUILD_CONTROLS_SHADOW(secondary_exec, SECONDARY_VM_EXEC_CONTROL, 32)

[v1,03/23] KVM: VMX: Add support for the secondary VM exit controls

Commit Message

Patch