From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 18 Mar 2024 23:03:26 +0000 (-0400)
Subject: Merge tag 'kvm-x86-svm-6.9' of https://github.com/kvm-x86/linux into HEAD
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1d55934ed584861d06efc8c61a77e9cbe287e7a2;p=linux.git

Merge tag 'kvm-x86-svm-6.9' of https://github.com/kvm-x86/linux into HEAD

KVM SVM changes for 6.9:

 - Add support for systems that are configured with SEV and SEV-ES+ enabled,
   but have all ASIDs assigned to SEV-ES+ guests, which effectively makes SEV
   unusuable.  Cleanup ASID handling to make supporting this scenario less
   brittle/ugly.

 - Return -EINVAL instead of -EBUSY if userspace attempts to invoke
   KVM_SEV{,ES}_INIT on an SEV+ guest.  The operation is simply invalid, and
   not related to resource contention in any way.
---

1d55934ed584861d06efc8c61a77e9cbe287e7a2
diff --cc arch/x86/kvm/svm/sev.c
index ae0ac12382b92,f06f9e51ad9db..e5a4d9b0e79fd
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@@ -246,8 -254,7 +254,8 @@@ static void sev_unbind_asid(struct kvm 
  static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
  {
  	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
 +	struct sev_platform_init_args init_args = {0};
- 	int asid, ret;
+ 	int ret;
  
  	if (kvm->created_vcpus)
  		return -EINVAL;
@@@ -258,13 -264,11 +265,12 @@@
  
  	sev->active = true;
  	sev->es_active = argp->id == KVM_SEV_ES_INIT;
- 	asid = sev_asid_new(sev);
- 	if (asid < 0)
+ 	ret = sev_asid_new(sev);
+ 	if (ret)
  		goto e_no_asid;
- 	sev->asid = asid;
  
 -	ret = sev_platform_init(&argp->error);
 +	init_args.probe = false;
 +	ret = sev_platform_init(&init_args);
  	if (ret)
  		goto e_free;