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From: Babu Moger <babu.moger@amd.com>
To: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com,
	sean.j.christopherson@intel.com, jmattson@google.com
Cc: kvm@vger.kernel.org, joro@8bytes.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, mingo@redhat.com, bp@alien8.de,
	hpa@zytor.com, tglx@linutronix.de
Subject: [PATCH v3 02/11] KVM: SVM: Change intercept_cr to generic intercepts
Date: Tue, 28 Jul 2020 18:38:00 -0500	[thread overview]
Message-ID: <159597948045.12744.16141020747986494741.stgit@bmoger-ubuntu> (raw)
In-Reply-To: <159597929496.12744.14654593948763926416.stgit@bmoger-ubuntu>

Change intercept_cr to generic intercepts in vmcb_control_area.
Use the new __set_intercept, __clr_intercept and __is_intercept
where applicable.

Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 arch/x86/include/asm/svm.h |   42 ++++++++++++++++++++++++++++++++----------
 arch/x86/kvm/svm/nested.c  |   26 +++++++++++++++++---------
 arch/x86/kvm/svm/svm.c     |    4 ++--
 arch/x86/kvm/svm/svm.h     |    6 +++---
 4 files changed, 54 insertions(+), 24 deletions(-)

diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 8a1f5382a4ea..d4739f4eae63 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -4,6 +4,37 @@
 
 #include <uapi/asm/svm.h>
 
+/*
+ * VMCB Control Area intercept bits starting
+ * at Byte offset 000h (Vector 0).
+ */
+
+enum vector_offset {
+	CR_VECTOR = 0,
+	MAX_VECTORS,
+};
+
+enum {
+	/* Byte offset 000h (Vector 0) */
+	INTERCEPT_CR0_READ = 0,
+	INTERCEPT_CR1_READ,
+	INTERCEPT_CR2_READ,
+	INTERCEPT_CR3_READ,
+	INTERCEPT_CR4_READ,
+	INTERCEPT_CR5_READ,
+	INTERCEPT_CR6_READ,
+	INTERCEPT_CR7_READ,
+	INTERCEPT_CR8_READ,
+	INTERCEPT_CR0_WRITE = 16,
+	INTERCEPT_CR1_WRITE,
+	INTERCEPT_CR2_WRITE,
+	INTERCEPT_CR3_WRITE,
+	INTERCEPT_CR4_WRITE,
+	INTERCEPT_CR5_WRITE,
+	INTERCEPT_CR6_WRITE,
+	INTERCEPT_CR7_WRITE,
+	INTERCEPT_CR8_WRITE,
+};
 
 enum {
 	INTERCEPT_INTR,
@@ -57,7 +88,7 @@ enum {
 
 
 struct __attribute__ ((__packed__)) vmcb_control_area {
-	u32 intercept_cr;
+	u32 intercepts[MAX_VECTORS];
 	u32 intercept_dr;
 	u32 intercept_exceptions;
 	u64 intercept;
@@ -240,15 +271,6 @@ struct __attribute__ ((__packed__)) vmcb {
 #define SVM_SELECTOR_READ_MASK SVM_SELECTOR_WRITE_MASK
 #define SVM_SELECTOR_CODE_MASK (1 << 3)
 
-#define INTERCEPT_CR0_READ	0
-#define INTERCEPT_CR3_READ	3
-#define INTERCEPT_CR4_READ	4
-#define INTERCEPT_CR8_READ	8
-#define INTERCEPT_CR0_WRITE	(16 + 0)
-#define INTERCEPT_CR3_WRITE	(16 + 3)
-#define INTERCEPT_CR4_WRITE	(16 + 4)
-#define INTERCEPT_CR8_WRITE	(16 + 8)
-
 #define INTERCEPT_DR0_READ	0
 #define INTERCEPT_DR1_READ	1
 #define INTERCEPT_DR2_READ	2
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 6bceafb19108..46f5c82d9b45 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -105,6 +105,7 @@ static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
 void recalc_intercepts(struct vcpu_svm *svm)
 {
 	struct vmcb_control_area *c, *h, *g;
+	unsigned int i;
 
 	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
 
@@ -117,15 +118,17 @@ void recalc_intercepts(struct vcpu_svm *svm)
 
 	svm->nested.host_intercept_exceptions = h->intercept_exceptions;
 
-	c->intercept_cr = h->intercept_cr;
+	for (i = 0; i < MAX_VECTORS; i++)
+		c->intercepts[i] = h->intercepts[i];
+
 	c->intercept_dr = h->intercept_dr;
 	c->intercept_exceptions = h->intercept_exceptions;
 	c->intercept = h->intercept;
 
 	if (g->int_ctl & V_INTR_MASKING_MASK) {
 		/* We only want the cr8 intercept bits of L1 */
-		c->intercept_cr &= ~(1U << INTERCEPT_CR8_READ);
-		c->intercept_cr &= ~(1U << INTERCEPT_CR8_WRITE);
+		__clr_intercept(&c->intercepts, INTERCEPT_CR8_READ);
+		__clr_intercept(&c->intercepts, INTERCEPT_CR8_WRITE);
 
 		/*
 		 * Once running L2 with HF_VINTR_MASK, EFLAGS.IF does not
@@ -138,7 +141,9 @@ void recalc_intercepts(struct vcpu_svm *svm)
 	/* We don't want to see VMMCALLs from a nested guest */
 	c->intercept &= ~(1ULL << INTERCEPT_VMMCALL);
 
-	c->intercept_cr |= g->intercept_cr;
+	for (i = 0; i < MAX_VECTORS; i++)
+		c->intercepts[i] |= g->intercepts[i];
+
 	c->intercept_dr |= g->intercept_dr;
 	c->intercept_exceptions |= g->intercept_exceptions;
 	c->intercept |= g->intercept;
@@ -147,7 +152,11 @@ void recalc_intercepts(struct vcpu_svm *svm)
 static void copy_vmcb_control_area(struct vmcb_control_area *dst,
 				   struct vmcb_control_area *from)
 {
-	dst->intercept_cr         = from->intercept_cr;
+	unsigned int i;
+
+	for (i = 0; i < MAX_VECTORS; i++)
+		dst->intercepts[i] = from->intercepts[i];
+
 	dst->intercept_dr         = from->intercept_dr;
 	dst->intercept_exceptions = from->intercept_exceptions;
 	dst->intercept            = from->intercept;
@@ -430,8 +439,8 @@ int nested_svm_vmrun(struct vcpu_svm *svm)
 			       nested_vmcb->control.event_inj,
 			       nested_vmcb->control.nested_ctl);
 
-	trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
-				    nested_vmcb->control.intercept_cr >> 16,
+	trace_kvm_nested_intercepts(nested_vmcb->control.intercepts[CR_VECTOR] & 0xffff,
+				    nested_vmcb->control.intercepts[CR_VECTOR] >> 16,
 				    nested_vmcb->control.intercept_exceptions,
 				    nested_vmcb->control.intercept);
 
@@ -703,8 +712,7 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
 		vmexit = nested_svm_intercept_ioio(svm);
 		break;
 	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
-		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
-		if (svm->nested.ctl.intercept_cr & bit)
+		if (__is_intercept(&svm->nested.ctl.intercepts, exit_code))
 			vmexit = NESTED_EXIT_DONE;
 		break;
 	}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index c0da4dd78ac5..334bda8b31c1 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2797,8 +2797,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
 	}
 
 	pr_err("VMCB Control Area:\n");
-	pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
-	pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
+	pr_err("%-20s%04x\n", "cr_read:", control->intercepts[CR_VECTOR] & 0xffff);
+	pr_err("%-20s%04x\n", "cr_write:", control->intercepts[CR_VECTOR] >> 16);
 	pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
 	pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
 	pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 3b669718190a..89d1d91d5bc6 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -236,7 +236,7 @@ static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
 {
 	struct vmcb *vmcb = get_host_vmcb(svm);
 
-	vmcb->control.intercept_cr |= (1U << bit);
+	__set_intercept(&vmcb->control.intercepts, bit);
 
 	recalc_intercepts(svm);
 }
@@ -245,7 +245,7 @@ static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
 {
 	struct vmcb *vmcb = get_host_vmcb(svm);
 
-	vmcb->control.intercept_cr &= ~(1U << bit);
+	__clr_intercept(&vmcb->control.intercepts, bit);
 
 	recalc_intercepts(svm);
 }
@@ -254,7 +254,7 @@ static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
 {
 	struct vmcb *vmcb = get_host_vmcb(svm);
 
-	return vmcb->control.intercept_cr & (1U << bit);
+	return __is_intercept(&vmcb->control.intercepts, bit);
 }
 
 static inline void set_dr_intercepts(struct vcpu_svm *svm)


  parent reply	other threads:[~2020-07-28 23:38 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28 23:37 [PATCH v3 00/11] SVM cleanup and INVPCID support for the AMD guests Babu Moger
2020-07-28 23:37 ` [PATCH v3 01/11] KVM: SVM: Introduce __set_intercept, __clr_intercept and __is_intercept Babu Moger
2020-07-28 23:50   ` Jim Mattson
2020-07-29 23:09   ` Paolo Bonzini
2020-07-30 16:34     ` Babu Moger
2020-07-28 23:38 ` Babu Moger [this message]
2020-07-28 23:56   ` [PATCH v3 02/11] KVM: SVM: Change intercept_cr to generic intercepts Jim Mattson
2020-07-29 16:08     ` Babu Moger
2020-07-29 23:08       ` Paolo Bonzini
2020-07-28 23:38 ` [PATCH v3 03/11] KVM: SVM: Change intercept_dr " Babu Moger
2020-07-28 23:59   ` Jim Mattson
2020-07-29 16:15     ` Babu Moger
2020-07-29 23:12     ` Paolo Bonzini
2020-07-30 16:38       ` Babu Moger
2020-07-30 22:41         ` Babu Moger
2020-07-30 22:49           ` Paolo Bonzini
2020-07-28 23:38 ` [PATCH v3 04/11] KVM: SVM: Modify intercept_exceptions " Babu Moger
2020-07-29 20:47   ` Jim Mattson
2020-07-29 21:31     ` Babu Moger
2020-07-28 23:38 ` [PATCH v3 05/11] KVM: SVM: Modify 64 bit intercept field to two 32 bit vectors Babu Moger
2020-07-29 21:06   ` Jim Mattson
2020-07-29 21:31     ` Babu Moger
2020-07-28 23:38 ` [PATCH v3 06/11] KVM: SVM: Add new intercept vector in vmcb_control_area Babu Moger
2020-07-29 21:23   ` Jim Mattson
2020-07-29 22:19     ` Babu Moger
2020-07-28 23:38 ` [PATCH v3 07/11] KVM: nSVM: Cleanup nested_state data structure Babu Moger
2020-07-29  0:02   ` Jim Mattson
2020-07-28 23:38 ` [PATCH v3 08/11] KVM: SVM: Remove set_cr_intercept, clr_cr_intercept and is_cr_intercept Babu Moger
2020-07-29  0:01   ` Jim Mattson
2020-07-28 23:38 ` [PATCH v3 09/11] KVM: SVM: Remove set_exception_intercept and clr_exception_intercept Babu Moger
2020-07-29 22:17   ` Jim Mattson
2020-07-28 23:38 ` [PATCH v3 10/11] KVM: X86: Move handling of INVPCID types to x86 Babu Moger
2020-07-29 22:25   ` Jim Mattson
2020-07-28 23:38 ` [PATCH v3 11/11] KVM:SVM: Enable INVPCID feature on AMD Babu Moger
2020-07-29 23:01   ` Jim Mattson
2020-07-30 16:32     ` Babu Moger
2020-07-29  0:09 ` [PATCH v3 00/11] SVM cleanup and INVPCID support for the AMD guests Jim Mattson

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