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From: Yang Weijiang <weijiang.yang@intel.com>
To: pbonzini@redhat.com, seanjc@google.com, jmattson@google.com,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: yu.c.zhang@linux.intel.com, Yang Weijiang <weijiang.yang@intel.com>
Subject: [PATCH v15 04/14] KVM: x86: Add #CP support in guest exception dispatch
Date: Wed,  3 Feb 2021 19:34:11 +0800	[thread overview]
Message-ID: <20210203113421.5759-5-weijiang.yang@intel.com> (raw)
In-Reply-To: <20210203113421.5759-1-weijiang.yang@intel.com>

Add handling for Control Protection (#CP) exceptions, vector 21, used
and introduced by Intel's Control-Flow Enforcement Technology (CET).
relevant CET violation case.  See Intel's SDM for details.

Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
 arch/x86/include/uapi/asm/kvm.h | 1 +
 arch/x86/kvm/x86.c              | 1 +
 arch/x86/kvm/x86.h              | 2 +-
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index 8e76d3701db3..507263d1d0b2 100644
--- a/arch/x86/include/uapi/asm/kvm.h
+++ b/arch/x86/include/uapi/asm/kvm.h
@@ -32,6 +32,7 @@
 #define MC_VECTOR 18
 #define XM_VECTOR 19
 #define VE_VECTOR 20
+#define CP_VECTOR 21
 
 /* Select x86 specific features in <linux/kvm.h> */
 #define __KVM_HAVE_PIT
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 99f787152d12..d9d3bae40a8c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -436,6 +436,7 @@ static int exception_class(int vector)
 	case NP_VECTOR:
 	case SS_VECTOR:
 	case GP_VECTOR:
+	case CP_VECTOR:
 		return EXCPT_CONTRIBUTORY;
 	default:
 		break;
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index c5ee0f5ce0f1..bdbd0b023ecc 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -116,7 +116,7 @@ static inline bool x86_exception_has_error_code(unsigned int vector)
 {
 	static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) |
 			BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
-			BIT(PF_VECTOR) | BIT(AC_VECTOR);
+			BIT(PF_VECTOR) | BIT(AC_VECTOR) | BIT(CP_VECTOR);
 
 	return (1U << vector) & exception_has_error_code;
 }
-- 
2.26.2


  parent reply	other threads:[~2021-02-03 11:23 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 11:34 [PATCH v15 00/14] Introduce support for guest CET feature Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 01/14] KVM: x86: Report XSS as an MSR to be saved if there are supported features Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 02/14] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 03/14] KVM: x86: Load guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2021-02-03 17:34   ` kernel test robot
2021-02-03 11:34 ` Yang Weijiang [this message]
2021-02-03 21:46   ` [PATCH v15 04/14] KVM: x86: Add #CP support in guest exception dispatch Sean Christopherson
2021-02-04  7:22     ` Yang Weijiang
2021-02-04  8:28       ` Paolo Bonzini
2021-02-04  8:24     ` Paolo Bonzini
2021-02-04 16:42       ` Sean Christopherson
2021-02-04 17:29         ` Paolo Bonzini
2021-02-03 11:34 ` [PATCH v15 05/14] KVM: VMX: Introduce CET VMCS fields and flags Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 06/14] KVM: x86: Add fault checks for CR4.CET Yang Weijiang
2021-02-03 21:24   ` kernel test robot
2021-02-03 11:34 ` [PATCH v15 07/14] KVM: VMX: Emulate reads and writes to CET MSRs Yang Weijiang
2021-02-03 11:57   ` Paolo Bonzini
2021-02-03 12:50     ` Yang Weijiang
2021-02-04  1:17   ` kernel test robot
2022-05-18 15:55   ` John Allen
2022-05-18 16:16     ` Sean Christopherson
2022-05-19  8:49       ` Yang, Weijiang
2021-02-03 11:34 ` [PATCH v15 08/14] KVM: VMX: Add a synthetic MSR to allow userspace VMM to access GUEST_SSP Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 09/14] KVM: x86: Report CET MSRs as to-be-saved if CET is supported Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 10/14] KVM: x86: Enable CET virtualization for VMX and advertise CET to userspace Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 11/14] KVM: VMX: Pass through CET MSRs to the guest when supported Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 12/14] KVM: nVMX: Add helper to check the vmcs01 MSR bitmap for MSR pass-through Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 13/14] KVM: nVMX: Enable CET support for nested VMX Yang Weijiang
2021-02-03 11:34 ` [PATCH v15 14/14] KVM: x86: Save/Restore GUEST_SSP to/from SMRAM Yang Weijiang
2021-02-03 12:07   ` Paolo Bonzini
2021-02-03 12:59     ` Yang Weijiang
2021-02-03 12:40 ` [PATCH v15 00/14] Introduce support for guest CET feature Paolo Bonzini

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