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From: Adalbert Lazar <alazar@bitdefender.com>
To: kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	alazar@bitdefender.com, mdontu@bitdefender.com
Subject: [RFC PATCH 02/19] kvm: x86: Add kvm_arch_vcpu_set_regs()
Date: Fri, 16 Jun 2017 16:43:31 +0300	[thread overview]
Message-ID: <20170616134348.17725-3-alazar@bitdefender.com> (raw)
In-Reply-To: <20170616134348.17725-1-alazar@bitdefender.com>

From: Mihai Dontu <mdontu@bitdefender.com>

This is a version of kvm_arch_vcpu_ioctl_set_regs() which does not touch
the exceptions vector.

Signed-off-by: Mihai Dontu <mdontu@bitdefender.com>
---
 arch/x86/kvm/x86.c       | 34 ++++++++++++++++++++++++++++++++++
 include/linux/kvm_host.h |  1 +
 2 files changed, 35 insertions(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 87d3cb901935..1a7493982310 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7291,6 +7291,40 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 	return 0;
 }
 
+/*
+ * Similar to kvm_arch_vcpu_ioctl_set_regs() but it does not reset
+ * the exceptions
+ */
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+	vcpu->arch.emulate_regs_need_sync_from_vcpu = true;
+	vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
+
+	kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
+	kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
+	kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
+	kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
+	kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
+	kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
+	kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
+	kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
+#ifdef CONFIG_X86_64
+	kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
+	kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
+	kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
+	kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
+	kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
+	kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
+	kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
+	kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
+#endif
+
+	kvm_rip_write(vcpu, regs->rip);
+	kvm_set_rflags(vcpu, regs->rflags);
+
+	kvm_make_request(KVM_REQ_EVENT, vcpu);
+}
+
 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
 {
 	struct kvm_segment cs;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 8c0664309815..48cd2d856132 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -748,6 +748,7 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 
 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs);
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
-- 
2.12.2

  parent reply	other threads:[~2017-06-16 13:42 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-16 13:43 [RFC PATCH 00/19] Guest introspection Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 01/19] kvm: x86: mmu: Add kvm_mmu_get_spte() and kvm_mmu_set_spte() Adalbert Lazar
2017-06-16 13:43 ` Adalbert Lazar [this message]
2017-06-16 13:43 ` [RFC PATCH 03/19] mm: Add vm_replace_page() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 04/19] kvm: Add kvm_enum() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 05/19] kvm: Add uuid member in struct kvm + support for KVM_CAP_VM_UUID Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 06/19] kvm: Add kvm_vm_shutdown() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 07/19] kvm: x86: Add kvm_arch_msr_intercept() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 08/19] kvm: Add the introspection subsystem Adalbert Lazar
2017-06-21 11:54   ` Paolo Bonzini
2017-06-21 12:36     ` Mihai Donțu
2017-06-21 12:57       ` Paolo Bonzini
2017-06-16 13:43 ` [RFC PATCH 09/19] kvm: Hook in kvmi on VM on/off events Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 10/19] kvm: vmx: Hook in kvmi_page_fault() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 11/19] kvm: x86: Hook in kvmi_breakpoint_event() Adalbert Lazar
2017-06-21 11:48   ` Paolo Bonzini
2017-06-21 12:37     ` Mihai Donțu
2017-06-16 13:43 ` [RFC PATCH 12/19] kvm: x86: Hook in kvmi_trap_event() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 13/19] kvm: x86: Hook in kvmi_cr_event() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 14/19] kvm: x86: Hook in kvmi_xsetbv_event() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 15/19] kvm: x86: Hook in kvmi_msr_event() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 16/19] kvm: x86: Change the emulation context Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 17/19] kvm: x86: Hook in kvmi_vmcall_event() Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 18/19] kvm: x86: Set the new spte flags before entering the guest Adalbert Lazar
2017-06-16 13:43 ` [RFC PATCH 19/19] kvm: x86: Handle KVM_REQ_INTROSPECTION Adalbert Lazar
2017-06-16 14:45 ` [RFC PATCH 00/19] Guest introspection Jan Kiszka
2017-06-16 15:18   ` Mihai Donțu
2017-06-16 15:34     ` Jan Kiszka
2017-06-16 15:59       ` Mihai Donțu
2017-06-19  9:39       ` Stefan Hajnoczi
2017-06-20 14:58         ` alazar
2017-06-20 15:03           ` Jan Kiszka
2017-06-21 11:04           ` Stefan Hajnoczi
2017-06-21 13:25             ` Paolo Bonzini
2017-06-27 16:12               ` Mihai Donțu
2017-06-27 16:23                 ` Paolo Bonzini
2017-06-16 17:05     ` Paolo Bonzini
2017-06-16 17:27       ` Jan Kiszka

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