Re: [PATCH Part1 RFC v4 03/36] x86/sev: Add support for hypervisor feature VMGEXIT

From: Brijesh Singh
Date: Tue Aug 10 2021 - 09:39:48 EST




On 8/10/21 6:22 AM, Borislav Petkov wrote:

SVM_VMGEXIT_HV_FEATURES


Noted.

+/* Bitmap of SEV features supported by the hypervisor */
+u64 sev_hv_features __section(".data..ro_after_init") = 0;

__ro_after_init

Noted.


diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
index 66b7f63ad041..540b81ac54c9 100644
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -96,6 +96,9 @@ struct ghcb_state {
static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
DEFINE_STATIC_KEY_FALSE(sev_es_enable_key);
+/* Bitmap of SEV features supported by the hypervisor */
+EXPORT_SYMBOL(sev_hv_features);

Why is this exported and why not a _GPL export?


I was thinking that some driver may need it in future, but nothing in my series needs it yet. I will drop it and we can revisit it later.

-Brijesh