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spapr: initial implementation for H_TPM_COMM/spapr-tpm-proxy

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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>
This commit is contained in:
Michael Roth 2019-07-17 15:58:42 -05:00 • committed by David Gibson
parent 1daba4d1b2
commit 0fb6bd0732
7 changed files with 270 additions and 1 deletions
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31
include/hw/ppc/spapr_tpm_proxy.h Normal file
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/*
* SPAPR TPM Proxy/Hypercall
*
* Copyright IBM Corp. 2019
*
* Authors:
* Michael Roth <mdroth@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_SPAPR_TPM_PROXY_H
#define HW_SPAPR_TPM_PROXY_H
#include "qom/object.h"
#include "hw/qdev-core.h"
#define TYPE_SPAPR_TPM_PROXY "spapr-tpm-proxy"
#define SPAPR_TPM_PROXY(obj) OBJECT_CHECK(SpaprTpmProxy, (obj), \
TYPE_SPAPR_TPM_PROXY)
typedef struct SpaprTpmProxy {
/*< private >*/
DeviceState parent;
char *host_path;
int host_fd;
} SpaprTpmProxy;
#endif /* HW_SPAPR_TPM_PROXY_H */