KVM Archive on lore.kernel.org
 help / color / Atom feed
From: Liran Alon <liran.alon@oracle.com>
To: qemu-devel@nongnu.org
Cc: pbonzini@redhat.com, mtosatti@redhat.com, rth@twiddle.net,
	ehabkost@redhat.com, kvm@vger.kernel.org, jmattson@google.com,
	maran.wilson@oracle.com, dgilbert@redhat.com,
	Liran Alon <liran.alon@oracle.com>
Subject: [QEMU PATCH v3 9/9] KVM: i386: Remove VMX migration blocker
Date: Mon, 17 Jun 2019 20:56:58 +0300
Message-ID: <20190617175658.135869-10-liran.alon@oracle.com> (raw)
In-Reply-To: <20190617175658.135869-1-liran.alon@oracle.com>

This effectively reverts d98f26073beb ("target/i386: kvm: add VMX migration blocker").
This can now be done because previous commits added support for Intel VMX migration.

AMD SVM migration is still blocked. This is because kernel
KVM_CAP_{GET,SET}_NESTED_STATE in case of AMD SVM is not
implemented yet. Therefore, required vCPU nested state is still
missing in order to perform valid migration for vCPU exposed with SVM.

Signed-off-by: Liran Alon <liran.alon@oracle.com>
---
 target/i386/kvm.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 797f8ac46435..772c8619efc4 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -948,7 +948,7 @@ static int hyperv_init_vcpu(X86CPU *cpu)
 }
 
 static Error *invtsc_mig_blocker;
-static Error *nested_virt_mig_blocker;
+static Error *svm_mig_blocker;
 
 #define KVM_MAX_CPUID_ENTRIES  100
 
@@ -1313,13 +1313,13 @@ int kvm_arch_init_vcpu(CPUState *cs)
                                   !!(c->ecx & CPUID_EXT_SMX);
     }
 
-    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
-        error_setg(&nested_virt_mig_blocker,
-                   "Nested virtualization does not support live migration yet");
-        r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
+    if (cpu_has_svm(env) && !svm_mig_blocker) {
+        error_setg(&svm_mig_blocker,
+                   "AMD SVM does not support live migration yet");
+        r = migrate_add_blocker(svm_mig_blocker, &local_err);
         if (local_err) {
             error_report_err(local_err);
-            error_free(nested_virt_mig_blocker);
+            error_free(svm_mig_blocker);
             return r;
         }
     }
-- 
2.20.1


  parent reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 17:56 [QEMU PATCH v3 0/9]: KVM: i386: Add support for save and restore of nested state Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 1/9] KVM: Introduce kvm_arch_destroy_vcpu() Liran Alon
2019-06-18 22:15   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 2/9] KVM: i386: Use symbolic constant for #DB/#BP exception constants Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 3/9] KVM: i386: Re-inject #DB to guest with updated DR6 Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 4/9] KVM: i386: Block migration for vCPUs exposed with nested virtualization Liran Alon
2019-06-18  8:44   ` Dr. David Alan Gilbert
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 5/9] linux-headers: i386: Modify struct kvm_nested_state to have explicit fields for data Liran Alon
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 6/9] vmstate: Add support for kernel integer types Liran Alon
2019-06-18  8:55   ` Dr. David Alan Gilbert
2019-06-18 15:36     ` Liran Alon
2019-06-18 15:42       ` Dr. David Alan Gilbert
2019-06-18 16:44         ` Paolo Bonzini
2019-06-17 17:56 ` [QEMU PATCH v3 7/9] KVM: i386: Add support for save and restore nested state Liran Alon
2019-06-18  9:03   ` Dr. David Alan Gilbert
2019-06-18 15:40     ` Liran Alon
2019-06-18 15:48       ` Dr. David Alan Gilbert
2019-06-18 15:50         ` Liran Alon
2019-06-18 16:16         ` Paolo Bonzini
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 8/9] KVM: i386: Add support for KVM_CAP_EXCEPTION_PAYLOAD Liran Alon
2019-06-18  9:07   ` Dr. David Alan Gilbert
2019-06-18 15:45     ` Liran Alon
2019-06-17 17:56 ` Liran Alon [this message]
2019-06-18 22:17   ` [Qemu-devel] [QEMU PATCH v3 9/9] KVM: i386: Remove VMX migration blocker Maran Wilson

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190617175658.135869-10-liran.alon@oracle.com \
    --to=liran.alon@oracle.com \
    --cc=dgilbert@redhat.com \
    --cc=ehabkost@redhat.com \
    --cc=jmattson@google.com \
    --cc=kvm@vger.kernel.org \
    --cc=maran.wilson@oracle.com \
    --cc=mtosatti@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=rth@twiddle.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org kvm@archiver.kernel.org
	public-inbox-index kvm


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/ public-inbox