5df022cf2e
Move the various memalign-related functions out of osdep.h and into their own header, which we include only where they are used. While we're doing this, add some brief documentation comments. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20220226180723.1706285-10-peter.maydell@linaro.org
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/*
|
|
* 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 "qemu/memalign.h"
|
|
#include "qapi/error.h"
|
|
#include "sysemu/memory_mapping.h"
|
|
#include "migration/vmstate.h"
|
|
#include "hw/qdev-core.h"
|
|
#include "hw/acpi/tpm.h"
|
|
#include "tpm_ppi.h"
|
|
#include "trace.h"
|
|
|
|
void tpm_ppi_reset(TPMPPI *tpmppi)
|
|
{
|
|
if (tpmppi->buf[0x15a /* movv, docs/specs/tpm.rst */] & 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) {
|
|
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, mr_offs,
|
|
block->target_end - block->target_start);
|
|
}
|
|
guest_phys_blocks_free(&guest_phys_blocks);
|
|
}
|
|
}
|
|
|
|
void tpm_ppi_init(TPMPPI *tpmppi, MemoryRegion *m,
|
|
hwaddr addr, Object *obj)
|
|
{
|
|
tpmppi->buf = qemu_memalign(qemu_real_host_page_size,
|
|
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);
|
|
}
|