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-rw-r--r--hw/tpm/Makefile.objs1
-rw-r--r--hw/tpm/tpm_crb.c13
-rw-r--r--hw/tpm/tpm_ppi.c53
-rw-r--r--hw/tpm/tpm_ppi.h46
-rw-r--r--hw/tpm/tpm_tis.c13
-rw-r--r--hw/tpm/trace-events3
6 files changed, 129 insertions, 0 deletions
diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs
index 1dc9f8bf2c..700c878622 100644
--- a/hw/tpm/Makefile.objs
+++ b/hw/tpm/Makefile.objs
@@ -1,4 +1,5 @@
common-obj-y += tpm_util.o
+obj-y += tpm_ppi.o
common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o
common-obj-$(CONFIG_TPM_CRB) += tpm_crb.o
common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o
diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
index a92dd50437..3087acc4ab 100644
--- a/hw/tpm/tpm_crb.c
+++ b/hw/tpm/tpm_crb.c
@@ -29,6 +29,7 @@
#include "sysemu/reset.h"
#include "tpm_int.h"
#include "tpm_util.h"
+#include "tpm_ppi.h"
#include "trace.h"
typedef struct CRBState {
@@ -41,6 +42,9 @@ typedef struct CRBState {
MemoryRegion cmdmem;
size_t be_buffer_size;
+
+ bool ppi_enabled;
+ TPMPPI ppi;
} CRBState;
#define CRB(obj) OBJECT_CHECK(CRBState, (obj), TYPE_TPM_CRB)
@@ -221,6 +225,7 @@ static const VMStateDescription vmstate_tpm_crb = {
static Property tpm_crb_properties[] = {
DEFINE_PROP_TPMBE("tpmdev", CRBState, tpmbe),
+ DEFINE_PROP_BOOL("ppi", CRBState, ppi_enabled, true),
DEFINE_PROP_END_OF_LIST(),
};
@@ -228,6 +233,9 @@ static void tpm_crb_reset(void *dev)
{
CRBState *s = CRB(dev);
+ if (s->ppi_enabled) {
+ tpm_ppi_reset(&s->ppi);
+ }
tpm_backend_reset(s->tpmbe);
memset(s->regs, 0, sizeof(s->regs));
@@ -291,6 +299,11 @@ static void tpm_crb_realize(DeviceState *dev, Error **errp)
memory_region_add_subregion(get_system_memory(),
TPM_CRB_ADDR_BASE + sizeof(s->regs), &s->cmdmem);
+ if (s->ppi_enabled) {
+ tpm_ppi_init(&s->ppi, get_system_memory(),
+ TPM_PPI_ADDR_BASE, OBJECT(s));
+ }
+
qemu_register_reset(tpm_crb_reset, dev);
}
diff --git a/hw/tpm/tpm_ppi.c b/hw/tpm/tpm_ppi.c
new file mode 100644
index 0000000000..cd8205f212
--- /dev/null
+++ b/hw/tpm/tpm_ppi.c
@@ -0,0 +1,53 @@
+/*
+ * tpm_ppi.c - TPM Physical Presence Interface
+ *
+ * Copyright (C) 2018 IBM Corporation
+ *
+ * Authors:
+ * Stefan Berger <stefanb@us.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.
+ *
+ */
+
+#include "qemu/osdep.h"
+
+#include "qapi/error.h"
+#include "cpu.h"
+#include "sysemu/memory_mapping.h"
+#include "sysemu/reset.h"
+#include "migration/vmstate.h"
+#include "tpm_ppi.h"
+#include "trace.h"
+
+void tpm_ppi_reset(TPMPPI *tpmppi)
+{
+ if (tpmppi->buf[0x15a /* movv, docs/specs/tpm.txt */] & 0x1) {
+ GuestPhysBlockList guest_phys_blocks;
+ GuestPhysBlock *block;
+
+ guest_phys_blocks_init(&guest_phys_blocks);
+ guest_phys_blocks_append(&guest_phys_blocks);
+ QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) {
+ trace_tpm_ppi_memset(block->host_addr,
+ block->target_end - block->target_start);
+ memset(block->host_addr, 0,
+ block->target_end - block->target_start);
+ memory_region_set_dirty(block->mr, 0,
+ block->target_end - block->target_start);
+ }
+ guest_phys_blocks_free(&guest_phys_blocks);
+ }
+}
+
+void tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m,
+ hwaddr addr, Object *obj)
+{
+ tpmppi->buf = g_malloc0(HOST_PAGE_ALIGN(TPM_PPI_ADDR_SIZE));
+ memory_region_init_ram_device_ptr(&tpmppi->ram, obj, "tpm-ppi",
+ TPM_PPI_ADDR_SIZE, tpmppi->buf);
+ vmstate_register_ram(&tpmppi->ram, DEVICE(obj));
+
+ memory_region_add_subregion(m, addr, &tpmppi->ram);
+}
diff --git a/hw/tpm/tpm_ppi.h b/hw/tpm/tpm_ppi.h
new file mode 100644
index 0000000000..d33ef27de6
--- /dev/null
+++ b/hw/tpm/tpm_ppi.h
@@ -0,0 +1,46 @@
+/*
+ * TPM Physical Presence Interface
+ *
+ * Copyright (C) 2018 IBM Corporation
+ *
+ * Authors:
+ * Stefan Berger <stefanb@us.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 TPM_TPM_PPI_H
+#define TPM_TPM_PPI_H
+
+#include "hw/acpi/tpm.h"
+#include "exec/address-spaces.h"
+
+typedef struct TPMPPI {
+ MemoryRegion ram;
+ uint8_t *buf;
+} TPMPPI;
+
+/**
+ * tpm_ppi_init:
+ * @tpmppi: a TPMPPI
+ * @m: the address-space / MemoryRegion to use
+ * @addr: the address of the PPI region
+ * @obj: the owner object
+ *
+ * Register the TPM PPI memory region at @addr on the given address
+ * space for the object @obj.
+ **/
+void tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m,
+ hwaddr addr, Object *obj);
+
+/**
+ * tpm_ppi_reset:
+ * @tpmppi: a TPMPPI
+ *
+ * Function to call on machine reset. It will check if the "Memory
+ * overwrite" variable is set, and perform a memory clear on volatile
+ * memory if requested.
+ **/
+void tpm_ppi_reset(TPMPPI *tpmppi);
+
+#endif /* TPM_TPM_PPI_H */
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 2563d7501f..fd6bb9b59a 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -31,6 +31,7 @@
#include "sysemu/tpm_backend.h"
#include "tpm_int.h"
#include "tpm_util.h"
+#include "tpm_ppi.h"
#include "trace.h"
#define TPM_TIS_NUM_LOCALITIES 5 /* per spec */
@@ -81,6 +82,9 @@ typedef struct TPMState {
TPMVersion be_tpm_version;
size_t be_buffer_size;
+
+ bool ppi_enabled;
+ TPMPPI ppi;
} TPMState;
#define TPM(obj) OBJECT_CHECK(TPMState, (obj), TYPE_TPM_TIS)
@@ -868,6 +872,9 @@ static void tpm_tis_reset(DeviceState *dev)
s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->be_driver),
TPM_TIS_BUFFER_MAX);
+ if (s->ppi_enabled) {
+ tpm_ppi_reset(&s->ppi);
+ }
tpm_backend_reset(s->be_driver);
s->active_locty = TPM_TIS_NO_LOCALITY;
@@ -954,6 +961,7 @@ static const VMStateDescription vmstate_tpm_tis = {
static Property tpm_tis_properties[] = {
DEFINE_PROP_UINT32("irq", TPMState, irq_num, TPM_TIS_IRQ),
DEFINE_PROP_TPMBE("tpmdev", TPMState, be_driver),
+ DEFINE_PROP_BOOL("ppi", TPMState, ppi_enabled, true),
DEFINE_PROP_END_OF_LIST(),
};
@@ -980,6 +988,11 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp)
memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
TPM_TIS_ADDR_BASE, &s->mmio);
+
+ if (s->ppi_enabled) {
+ tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
+ TPM_PPI_ADDR_BASE, OBJECT(s));
+ }
}
static void tpm_tis_initfn(Object *obj)
diff --git a/hw/tpm/trace-events b/hw/tpm/trace-events
index 25bee0cecf..920d32ad55 100644
--- a/hw/tpm/trace-events
+++ b/hw/tpm/trace-events
@@ -51,3 +51,6 @@ tpm_tis_mmio_write_init_abort(void) "Initiating abort"
tpm_tis_mmio_write_lowering_irq(void) "Lowering IRQ"
tpm_tis_mmio_write_data2send(uint32_t value, unsigned size) "Data to send to TPM: 0x%08x (size=%d)"
tpm_tis_pre_save(uint8_t locty, uint32_t rw_offset) "locty: %d, rw_offset = %u"
+
+# hw/tpm/tpm_ppi.c
+tpm_ppi_memset(uint8_t *ptr, size_t size) "memset: %p %zu"
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-04-30 12:54:42 +0200