From 45e576c74533c70b38ba00f0c298dcdbc1635163 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Tue, 27 Jul 2021 10:25:42 +0200 Subject: [PATCH] tpm: mark correct memory region range dirty when clearing RAM MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Fixes: ffab1be70692 ("tpm: clear RAM when "memory overwrite" requested") Cc: Marc-André Lureau Cc: Paolo Bonzini Cc: "Michael S. Tsirkin" Cc: Eduardo Habkost Cc: Alex Williamson Cc: Dr. David Alan Gilbert Cc: Igor Mammedov Cc: Claudio Fontana Cc: Thomas Huth Cc: "Alex Bennée" Cc: Peter Xu Cc: Laurent Vivier Cc: Stefan Berger Signed-off-by: David Hildenbrand Reviewed-by: Peter Xu Message-Id: <20210727082545.17934-2-david@redhat.com> Signed-off-by: Paolo Bonzini --- hw/tpm/tpm_ppi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/tpm/tpm_ppi.c b/hw/tpm/tpm_ppi.c index 362edcc5c9..274e9aa4b0 100644 --- a/hw/tpm/tpm_ppi.c +++ b/hw/tpm/tpm_ppi.c @@ -30,11 +30,14 @@ void tpm_ppi_reset(TPMPPI *tpmppi) guest_phys_blocks_init(&guest_phys_blocks); guest_phys_blocks_append(&guest_phys_blocks); 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, block->target_end - block->target_start); memset(block->host_addr, 0, 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); } guest_phys_blocks_free(&guest_phys_blocks);