45e576c745
We might not start at the beginning of the memory region. Let's
calculate the offset into the memory region via the difference in the
host addresses.
Acked-by: Stefan Berger <stefanb@linux.ibm.com>
Fixes: ffab1be706 ("tpm: clear RAM when "memory overwrite" requested")
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Claudio Fontana <cfontana@suse.de>
Cc: Thomas Huth <thuth@redhat.com>
Cc: "Alex Bennée" <alex.bennee@linaro.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210727082545.17934-2-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
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* tpm_ppi.c - TPM Physical Presence Interface
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*
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* Copyright (C) 2018 IBM Corporation
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*
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* Authors:
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* Stefan Berger <stefanb@us.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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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "cpu.h"
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#include "sysemu/memory_mapping.h"
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#include "migration/vmstate.h"
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#include "hw/acpi/tpm.h"
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#include "tpm_ppi.h"
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#include "trace.h"
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void tpm_ppi_reset(TPMPPI *tpmppi)
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{
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if (tpmppi->buf[0x15a /* movv, docs/specs/tpm.rst */] & 0x1) {
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GuestPhysBlockList guest_phys_blocks;
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GuestPhysBlock *block;
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guest_phys_blocks_init(&guest_phys_blocks);
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guest_phys_blocks_append(&guest_phys_blocks);
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QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) {
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hwaddr mr_offs = block->host_addr -
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(uint8_t *)memory_region_get_ram_ptr(block->mr);
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trace_tpm_ppi_memset(block->host_addr,
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block->target_end - block->target_start);
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memset(block->host_addr, 0,
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block->target_end - block->target_start);
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memory_region_set_dirty(block->mr, mr_offs,
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block->target_end - block->target_start);
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}
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guest_phys_blocks_free(&guest_phys_blocks);
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}
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}
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void tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m,
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hwaddr addr, Object *obj)
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{
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tpmppi->buf = qemu_memalign(qemu_real_host_page_size,
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HOST_PAGE_ALIGN(TPM_PPI_ADDR_SIZE));
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memory_region_init_ram_device_ptr(&tpmppi->ram, obj, "tpm-ppi",
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TPM_PPI_ADDR_SIZE, tpmppi->buf);
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vmstate_register_ram(&tpmppi->ram, DEVICE(obj));
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memory_region_add_subregion(m, addr, &tpmppi->ram);
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}
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