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| author | Brijesh Singh <brijesh.singh@amd.com> | 2017-12-04 19:57:28 +0300 |
|---|---|---|
| committer | Brijesh Singh <brijesh.singh@amd.com> | 2017-12-04 19:57:28 +0300 |
| commit | 2a6170dfe755b167ca8d6bba2e73695f08b37c54 (patch) | |
| tree | a84a23299f41a90e566c6b7acb92d27849fd0316 /drivers/crypto/ccp/sp-dev.c | |
| parent | 592d5e74ddb28f66c5f4acffcd36156b1621a7c4 (diff) | |
| download | linux-2a6170dfe755b167ca8d6bba2e73695f08b37c54.tar.xz | |
crypto: ccp: Add Platform Security Processor (PSP) device support
The Platform Security Processor (PSP) is part of the AMD Secure
Processor (AMD-SP) functionality. The PSP is a dedicated processor
that provides support for key management commands in Secure Encrypted
Virtualization (SEV) mode, along with software-based Trusted Execution
Environment (TEE) to enable third-party trusted applications.
Note that the key management functionality provided by the SEV firmware
can be used outside of the kvm-amd driver hence it doesn't need to
depend on CONFIG_KVM_AMD.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Gary Hook <gary.hook@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-crypto@vger.kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Improvements-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/crypto/ccp/sp-dev.c')
| -rw-r--r-- | drivers/crypto/ccp/sp-dev.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/sp-dev.c b/drivers/crypto/ccp/sp-dev.c index bef387c8abfd..cf101c039c8f 100644 --- a/drivers/crypto/ccp/sp-dev.c +++ b/drivers/crypto/ccp/sp-dev.c @@ -198,6 +198,8 @@ int sp_init(struct sp_device *sp) if (sp->dev_vdata->ccp_vdata) ccp_dev_init(sp); + if (sp->dev_vdata->psp_vdata) + psp_dev_init(sp); return 0; } @@ -206,6 +208,9 @@ void sp_destroy(struct sp_device *sp) if (sp->dev_vdata->ccp_vdata) ccp_dev_destroy(sp); + if (sp->dev_vdata->psp_vdata) + psp_dev_destroy(sp); + sp_del_device(sp); } @@ -237,6 +242,27 @@ int sp_resume(struct sp_device *sp) } #endif +struct sp_device *sp_get_psp_master_device(void) +{ + struct sp_device *i, *ret = NULL; + unsigned long flags; + + write_lock_irqsave(&sp_unit_lock, flags); + if (list_empty(&sp_units)) + goto unlock; + + list_for_each_entry(i, &sp_units, entry) { + if (i->psp_data) + break; + } + + if (i->get_psp_master_device) + ret = i->get_psp_master_device(); +unlock: + write_unlock_irqrestore(&sp_unit_lock, flags); + return ret; +} + static int __init sp_mod_init(void) { #ifdef CONFIG_X86 |