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tpm: mark correct memory region range dirty when clearing RAM

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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>
This commit is contained in:
David Hildenbrand 2021-07-27 10:25:42 +02:00 • committed by Paolo Bonzini
parent 77ae2302ae
commit 45e576c745
1 changed files with 4 additions and 1 deletions
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5
hw/tpm/tpm_ppi.c
View file

@ -30,11 +30,14 @@ void tpm_ppi_reset(TPMPPI *tpmppi)
guest_phys_blocks_init(&guest_phys_blocks); guest_phys_blocks_init(&guest_phys_blocks);
guest_phys_blocks_append(&guest_phys_blocks); guest_phys_blocks_append(&guest_phys_blocks);
QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) { QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) {
hwaddr mr_offs = block->host_addr -
(uint8_t *)memory_region_get_ram_ptr(block->mr);
trace_tpm_ppi_memset(block->host_addr, trace_tpm_ppi_memset(block->host_addr,
block->target_end - block->target_start); block->target_end - block->target_start);
memset(block->host_addr, 0, memset(block->host_addr, 0,
block->target_end - block->target_start); block->target_end - block->target_start);
memory_region_set_dirty(block->mr, 0, memory_region_set_dirty(block->mr, mr_offs,
block->target_end - block->target_start); block->target_end - block->target_start);
} }
guest_phys_blocks_free(&guest_phys_blocks); guest_phys_blocks_free(&guest_phys_blocks);