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crypto: ccp - add TEE support for Raven Ridge

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Adds a PCI device entry for Raven Ridge. Raven Ridge is an APU with a
dedicated AMD Secure Processor having Trusted Execution Environment (TEE)
support. The TEE provides a secure environment for running Trusted
Applications (TAs) which implement security-sensitive parts of a feature.

This patch configures AMD Secure Processor's TEE interface by initializing
a ring buffer (shared memory between Rich OS and Trusted OS) which can hold
multiple command buffer entries. The TEE interface is facilitated by a set
of CPU to PSP mailbox registers.

The next patch will address how commands are submitted to the ring buffer.

Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Co-developed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Rijo Thomas
2019-12-04 11:49:02 +05:30
committed by Herbert Xu
parent f100ab62b6
commit 33960acccf
7 changed files with 431 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/crypto/ccp/psp-dev.c
View File

@@ -13,6 +13,7 @@
#include "sp-dev.h"
#include "psp-dev.h"
#include "sev-dev.h"
#include "tee-dev.h"
struct psp_device *psp_master;
@@ -45,6 +46,9 @@ static irqreturn_t psp_irq_handler(int irq, void *data)
if (status) {
if (psp->sev_irq_handler)
psp->sev_irq_handler(irq, psp->sev_irq_data, status);
if (psp->tee_irq_handler)
psp->tee_irq_handler(irq, psp->tee_irq_data, status);
}
/* Clear the interrupt status by writing the same value we read. */
@@ -109,6 +113,25 @@ static int psp_check_support(struct psp_device *psp,
return 0;
}
static int psp_init(struct psp_device *psp, unsigned int capability)
{
int ret;
if (!psp_check_sev_support(psp, capability)) {
ret = sev_dev_init(psp);
if (ret)
return ret;
}
if (!psp_check_tee_support(psp, capability)) {
ret = tee_dev_init(psp);
if (ret)
return ret;
}
return 0;
}
int psp_dev_init(struct sp_device *sp)
{
struct device *dev = sp->dev;
@@ -151,7 +174,7 @@ int psp_dev_init(struct sp_device *sp)
goto e_err;
}
ret = sev_dev_init(psp);
ret = psp_init(psp, capability);
if (ret)
goto e_irq;
@@ -189,6 +212,8 @@ void psp_dev_destroy(struct sp_device *sp)
sev_dev_destroy(psp);
tee_dev_destroy(psp);
sp_free_psp_irq(sp, psp);
}
@@ -204,6 +229,18 @@ void psp_clear_sev_irq_handler(struct psp_device *psp)
psp_set_sev_irq_handler(psp, NULL, NULL);
}
void psp_set_tee_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
void *data)
{
psp->tee_irq_data = data;
psp->tee_irq_handler = handler;
}
void psp_clear_tee_irq_handler(struct psp_device *psp)
{
psp_set_tee_irq_handler(psp, NULL, NULL);
}
struct psp_device *psp_get_master_device(void)
{
struct sp_device *sp = sp_get_psp_master_device();