Commit a6136669 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

KVM: SVM: Ensure PSP module is initialized if KVM module is built-in 



The kernel's initcall infrastructure lacks the ability to express
dependencies between initcalls, whereas the modules infrastructure
automatically handles dependencies via symbol loading.  Ensure the
PSP SEV driver is initialized before proceeding in sev_hardware_setup()
if KVM is built-in as the dependency isn't handled by the initcall
infrastructure.

Reviewed-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: default avatarAshish Kalra <ashish.kalra@amd.com>
Link: https://lore.kernel.org/r/f78ddb64087df27e7bcb1ae0ab53f55aa0804fab.1739226950.git.ashish.kalra@amd.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent f7354250

arch/x86/kvm/svm/sev.c

+10 −0
Original line number Diff line number Diff line
@@ -2951,6 +2951,16 @@ void __init sev_hardware_setup(void) 
	    WARN_ON_ONCE(!boot_cpu_has(X86_FEATURE_FLUSHBYASID)))

		goto out;



	/*

	 * The kernel's initcall infrastructure lacks the ability to express

	 * dependencies between initcalls, whereas the modules infrastructure

	 * automatically handles dependencies via symbol loading.  Ensure the

	 * PSP SEV driver is initialized before proceeding if KVM is built-in,

	 * as the dependency isn't handled by the initcall infrastructure.

	 */

	if (IS_BUILTIN(CONFIG_KVM_AMD) && sev_module_init())

		goto out;



	/* Retrieve SEV CPUID information */

	cpuid(0x8000001f, &eax, &ebx, &ecx, &edx);