@@ -33,4 +33,14 @@ typedef struct TPMPPI {
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 */
@@ -233,6 +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));
@@ -16,8 +16,30 @@
#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)
@@ -872,6 +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;
@@ -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"