Re: [RFC PATCH V2 10/18] drivers: hv: Decrypt percpu hvcall input arg page in sev-snp enlightened guest

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On 12/15/2022 2:16 AM, Michael Kelley (LINUX) wrote:
@@ -134,6 +136,16 @@ int hv_common_cpu_init(unsigned int cpu)
  	if (!(*inputarg))
  		return -ENOMEM;

+	if (hv_isolation_type_en_snp()) {
+		ret = set_memory_decrypted((unsigned long)*inputarg, 1);
+		if (ret) {
+			kfree(*inputarg);
After the kfree(), set *inputarg back to NULL.  There's other code that
tests the value of *inputarg to know if the per-CPU hypercall page has
been successfully allocated.


Good point! Will add in the next version.



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