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This implements the H_TPM_COMM hypercall, which is used by an Ultravisor to pass TPM commands directly to the host's TPM device, or a TPM Resource Manager associated with the device. This also introduces a new virtual device, spapr-tpm-proxy, which is used to configure the host TPM path to be used to service requests sent by H_TPM_COMM hcalls, for example: -device spapr-tpm-proxy,id=tpmp0,host-path=/dev/tpmrm0 By default, no spapr-tpm-proxy will be created, and hcalls will return H_FUNCTION. The full specification for this hypercall can be found in docs/specs/ppc-spapr-uv-hcalls.txt Since SVM-related hcalls like H_TPM_COMM use a reserved range of 0xEF00-0xEF80, we introduce a separate hcall table here to handle them. Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com Message-Id: <20190717205842.17827-3-mdroth@linux.vnet.ibm.com> [dwg: Corrected #include for upstream change] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
32 lines
719 B
C
32 lines
719 B
C
/*
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* SPAPR TPM Proxy/Hypercall
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*
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* Copyright IBM Corp. 2019
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*
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* Authors:
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* Michael Roth <mdroth@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_SPAPR_TPM_PROXY_H
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#define HW_SPAPR_TPM_PROXY_H
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#include "qom/object.h"
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#include "hw/qdev-core.h"
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#define TYPE_SPAPR_TPM_PROXY "spapr-tpm-proxy"
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#define SPAPR_TPM_PROXY(obj) OBJECT_CHECK(SpaprTpmProxy, (obj), \
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TYPE_SPAPR_TPM_PROXY)
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typedef struct SpaprTpmProxy {
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/*< private >*/
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DeviceState parent;
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char *host_path;
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int host_fd;
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} SpaprTpmProxy;
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#endif /* HW_SPAPR_TPM_PROXY_H */
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