[RFC PATCH v1 28/28] KVM: SVM: add command to query SEV API version
From: Brijesh Singh <hidden>
Date: 2016-08-22 23:30:08
Also in:
kvm, linux-efi, lkml
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Signed-off-by: Brijesh Singh <redacted> --- arch/x86/kvm/svm.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4af195d..88b8f89 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c@@ -5779,6 +5779,25 @@ err_1: return ret; } +static int sev_api_version(int *psp_ret) +{ + int ret; + struct psp_data_status *status; + + status = kzalloc(sizeof(*status), GFP_KERNEL); + if (!status) + return -ENOMEM; + + ret = psp_platform_status(status, psp_ret); + if (ret) + goto err; + + ret = (status->api_major << 8) | status->api_minor; +err: + kfree(status); + return ret; +} + static int amd_sev_issue_cmd(struct kvm *kvm, struct kvm_sev_issue_cmd __user *user_data) {
@@ -5819,6 +5838,10 @@ static int amd_sev_issue_cmd(struct kvm *kvm, &arg.ret_code); break; } + case KVM_SEV_API_VERSION: { + r = sev_api_version(&arg.ret_code); + break; + } default: break; } --
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