Commit 435b344a authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

crypto: ccp: Add external API interface for PSP module initialization 



KVM is dependent on the PSP SEV driver and PSP SEV driver needs to be
loaded before KVM module. In case of module loading any dependent
modules are automatically loaded but in case of built-in modules there
is no inherent mechanism available to specify dependencies between
modules and ensure that any dependent modules are loaded implicitly.

Add a new external API interface for PSP module initialization which
allows PSP SEV driver to be loaded explicitly if KVM is built-in.

Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Co-developed-by: default avatarAshish Kalra <ashish.kalra@amd.com>
Signed-off-by: default avatarAshish Kalra <ashish.kalra@amd.com>
Reviewed-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Message-ID: <15279ca0cad56a07cf12834ec544310f85ff5edc.1739226950.git.ashish.kalra@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3bb7dceb

drivers/crypto/ccp/sp-dev.c

+14 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/types.h>

#include <linux/ccp.h>



#include "sev-dev.h"

#include "ccp-dev.h"

#include "sp-dev.h"
@@ -253,8 +254,12 @@ struct sp_device *sp_get_psp_master_device(void) 
static int __init sp_mod_init(void)

{

#ifdef CONFIG_X86

	static bool initialized;

	int ret;



	if (initialized)

		return 0;



	ret = sp_pci_init();

	if (ret)

		return ret;
@@ -263,6 +268,8 @@ static int __init sp_mod_init(void) 
	psp_pci_init();

#endif



	initialized = true;



	return 0;

#endif
@@ -279,6 +286,13 @@ static int __init sp_mod_init(void) 
	return -ENODEV;

}



#if IS_BUILTIN(CONFIG_KVM_AMD) && IS_ENABLED(CONFIG_KVM_AMD_SEV)

int __init sev_module_init(void)

{

	return sp_mod_init();

}

#endif



static void __exit sp_mod_exit(void)

{

#ifdef CONFIG_X86

include/linux/psp-sev.h

+9 −0
Original line number Diff line number Diff line
@@ -814,6 +814,15 @@ struct sev_data_snp_commit { 


#ifdef CONFIG_CRYPTO_DEV_SP_PSP



/**

 * sev_module_init - perform PSP SEV module initialization

 *

 * Returns:

 * 0 if the PSP module is successfully initialized

 * negative value if the PSP module initialization fails

 */

int sev_module_init(void);



/**

 * sev_platform_init - perform SEV INIT command

 *