linux-kernel - [PATCH v3 2/3] tpm: vtpm_proxy: Implement request

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Date:   Thu,  4 May 2017 10:56:26 -0400
From:   Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:     tpmdd-devel@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org,
        jarkko.sakkinen@...ux.intel.com
Cc:     jgunthorpe@...idianresearch.com, linux-kernel@...r.kernel.org,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>
Subject: [PATCH v3 2/3] tpm: vtpm_proxy: Implement request_locality function.

Implement the request_locality function. Accept all localities assuming
that the recipient (TPM emulator) handling TPM commands with prepended
locality modifier will check for a valid locality and return a TPM error
in case the locality is invalid.

Signed-off-by: Stefan Berger <stefanb@...ux.vnet.ibm.com>
---
 drivers/char/tpm/tpm_vtpm_proxy.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
index fb4d207..48b9818 100644
--- a/drivers/char/tpm/tpm_vtpm_proxy.c
+++ b/drivers/char/tpm/tpm_vtpm_proxy.c
@@ -371,6 +371,11 @@ static bool vtpm_proxy_tpm_req_canceled(struct tpm_chip  *chip, u8 status)
 	return ret;
 }
 
+static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality)
+{
+	return locality;
+}
+
 static const struct tpm_class_ops vtpm_proxy_tpm_ops = {
 	.flags = TPM_OPS_AUTO_STARTUP,
 	.recv = vtpm_proxy_tpm_op_recv,
@@ -380,6 +385,7 @@ static const struct tpm_class_ops vtpm_proxy_tpm_ops = {
 	.req_complete_mask = VTPM_PROXY_REQ_COMPLETE_FLAG,
 	.req_complete_val = VTPM_PROXY_REQ_COMPLETE_FLAG,
 	.req_canceled = vtpm_proxy_tpm_req_canceled,
+	.request_locality = vtpm_proxy_request_locality,
 };
 
 /*
-- 
2.4.3