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50337286b7
Let's also set a maximum size for "etc/acpi/rsdp", so the maximum size doesn't get implicitly set based on the initial table size. In my experiments, the table size was in the range of 22 bytes, so a single page (== what we used until now) seems to be good enough. Now that we have defined maximum sizes for all currently used table types, let's assert that we catch usage with new tables that need a proper maximum size definition. Also assert that our initial size does not exceed the maximum size; while qemu_ram_alloc_internal() properly asserts that the initial RAMBlock size is <= its maximum size, the result might differ when the host page size is bigger than 4k. Suggested-by: Laszlo Ersek <lersek@redhat.com> Cc: Alistair Francis <alistair.francis@xilinx.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Shannon Zhao <shannon.zhaosl@gmail.com> Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Laszlo Ersek <lersek@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20210304105554.121674-5-david@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/*
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* Utilities for generating ACPI tables and passing them to Guests
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*
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* Copyright (C) 2019 Intel Corporation
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* Copyright (C) 2019 Red Hat Inc
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*
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* Author: Wei Yang <richardw.yang@linux.intel.com>
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* Author: Michael S. Tsirkin <mst@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/acpi/aml-build.h"
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#include "hw/acpi/utils.h"
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#include "hw/loader.h"
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MemoryRegion *acpi_add_rom_blob(FWCfgCallback update, void *opaque,
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GArray *blob, const char *name)
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{
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uint64_t max_size;
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/* Reserve RAM space for tables: add another order of magnitude. */
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if (!strcmp(name, ACPI_BUILD_TABLE_FILE)) {
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max_size = 0x200000;
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} else if (!strcmp(name, ACPI_BUILD_LOADER_FILE)) {
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max_size = 0x10000;
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} else if (!strcmp(name, ACPI_BUILD_RSDP_FILE)) {
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max_size = 0x1000;
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} else {
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g_assert_not_reached();
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}
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g_assert(acpi_data_len(blob) <= max_size);
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return rom_add_blob(name, blob->data, acpi_data_len(blob), max_size, -1,
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name, update, opaque, NULL, true);
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}
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