linux-kernel - [PATCH v2 11/13] KVM: selftests: add support for creating SEV-ES guests

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Date:   Thu, 16 Dec 2021 11:13:56 -0600
From:   Michael Roth <michael.roth@....com>
To:     <linux-kselftest@...r.kernel.org>
CC:     <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <x86@...nel.org>, Nathan Tempelman <natet@...gle.com>,
        Marc Orr <marcorr@...gle.com>,
        "Steve Rutherford" <srutherford@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Mingwei Zhang <mizhang@...gle.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Varad Gautam <varad.gautam@...e.com>,
        Shuah Khan <shuah@...nel.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "David Woodhouse" <dwmw@...zon.co.uk>,
        Ricardo Koller <ricarkol@...gle.com>,
        "Jim Mattson" <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "Borislav Petkov" <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Krish Sadhukhan <krish.sadhukhan@...cle.com>,
        Peter Gonda <pgonda@...gle.com>
Subject: [PATCH v2 11/13] KVM: selftests: add support for creating SEV-ES guests

Only a couple KVM_SEV_* ioctls need to be handled differently for
SEV-ES. Do so when the specified policy indicates SEV-ES support.

Signed-off-by: Michael Roth <michael.roth@....com>
---
 tools/testing/selftests/kvm/lib/x86_64/sev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
index 4a99862d62e6..181be03f5a10 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -182,14 +182,18 @@ struct sev_vm *sev_vm_create(uint32_t policy, uint64_t npages)
 		return NULL;
 	sev->sev_policy = policy;
 
-	kvm_sev_ioctl(sev, KVM_SEV_INIT, NULL);
+	if (sev->sev_policy & SEV_POLICY_ES)
+		kvm_sev_ioctl(sev, KVM_SEV_ES_INIT, NULL);
+	else
+		kvm_sev_ioctl(sev, KVM_SEV_INIT, NULL);
 
 	vm_set_memory_encryption(vm, true, true, sev->enc_bit);
 	vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, npages, 0);
 	sev_register_user_region(sev, addr_gpa2hva(vm, 0),
 				 npages * vm_get_page_size(vm));
 
-	pr_info("SEV guest created, policy: 0x%x, size: %lu KB\n",
+	pr_info("%s guest created, policy: 0x%x, size: %lu KB\n",
+		(sev->sev_policy & SEV_POLICY_ES) ? "SEV-ES" : "SEV",
 		sev->sev_policy, npages * vm_get_page_size(vm) / 1024);
 
 	return sev;
@@ -211,6 +215,9 @@ void sev_vm_launch(struct sev_vm *sev)
 		    "Unexpected guest state: %d", ksev_status.state);
 
 	sev_encrypt(sev);
+
+	if (sev->sev_policy & SEV_POLICY_ES)
+		kvm_sev_ioctl(sev, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL);
 }
 
 void sev_vm_launch_measure(struct sev_vm *sev, uint8_t *measurement)
-- 
2.25.1