[PATCH v1 5/8] crypto: cpp - Bind to psp platform device on x86

Jeremi Piotrowski
2023-01-23T15:25:19Z

The PSP in Hyper-V VMs is exposed through the ASP ACPI table and is
represented as a platform_device. Allow the ccp driver to bind to it by
adding an id_table and initing the platform_driver also on x86. At this
point probe is called for the psp device but init fails due to missing
driver data.

Signed-off-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
---
drivers/crypto/ccp/sp-dev.c | 8 ++++++--
drivers/crypto/ccp/sp-platform.c | 7 +++++++
2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ccp/sp-dev.c b/drivers/crypto/ccp/sp-dev.c
index 7eb3e4668286..52b8d957d0f6 100644
--- a/drivers/crypto/ccp/sp-dev.c
+++ b/drivers/crypto/ccp/sp-dev.c
@@ -258,7 +258,11 @@ static int __init sp_mod_init(void)
ret = sp_pci_init();
if (ret)
return ret;
-
+ ret = sp_platform_init();
+ if (ret) {
+ sp_pci_exit();
+ return ret;
+ }
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
psp_pci_init();
#endif
@@ -286,7 +290,7 @@ static void __exit sp_mod_exit(void)
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
psp_pci_exit();
#endif
-
+ sp_platform_exit();
sp_pci_exit();
#endif

diff --git a/drivers/crypto/ccp/sp-platform.c b/drivers/crypto/ccp/sp-platform.c
index 7d79a8744f9a..ea8926e87981 100644
--- a/drivers/crypto/ccp/sp-platform.c
+++ b/drivers/crypto/ccp/sp-platform.c
@@ -56,6 +56,12 @@ static const struct of_device_id sp_of_match[] = {
MODULE_DEVICE_TABLE(of, sp_of_match);
#endif

+static const struct platform_device_id sp_plat_match[] = {
+ { "psp" },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, sp_plat_match);
+
static struct sp_dev_vdata *sp_get_of_version(struct platform_device *pdev)
{
#ifdef CONFIG_OF
@@ -212,6 +218,7 @@ static int sp_platform_resume(struct platform_device *pdev)
#endif

static struct platform_driver sp_platform_driver = {
+ .id_table = sp_plat_match,
.driver = {
.name = "ccp",
#ifdef CONFIG_ACPI
--
2.25.1