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From 464ceecd1e9c070e613624fb896df54b7e4a3e38 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Wed, 11 May 2016 12:33:42 +0200
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Subject: [PATCH 03/10] acpi: strip compiler info in built-in DSDT
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RH-Author: Laszlo Ersek <lersek@redhat.com>
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Message-id: <1462970028-10959-2-git-send-email-lersek@redhat.com>
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Patchwork-id: 70378
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O-Subject: [RHEL-7.3 qemu-kvm PATCH v2 1/7] acpi: strip compiler info in built-in DSDT
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Bugzilla: 1330969
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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From: "Michael S. Tsirkin" <mst@redhat.com>
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IASL stores it's revision in each table header it generates.
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That's not nice since guests will see a change each time they move
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between hypervisors. We generally fill our own info for tables, but we
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(and seabios) forgot to do this for the built-in DSDT.
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Modifications in DSDT table:
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OEM ID: "BXPC" -> "BOCHS "
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OEM Table ID: "BXDSDT" -> "BXPCDSDT"
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Compiler ID: "INTL" -> "BXPC"
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Compiler Version: 0x20130823 -> 0x00000001
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Tested-by: Marcel Apfelbaum <marcel.a@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 53db092ad1c81c30a617f44e83e8fb9e27c001ba)
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/acpi-build.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
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index 8be1286..a3a4c3b 100644
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--- a/hw/i386/acpi-build.c
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+++ b/hw/i386/acpi-build.c
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@@ -924,10 +924,16 @@ build_mcfg_q35(GArray *table_data, GArray *linker, AcpiMcfgInfo *info)
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static void
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build_dsdt(GArray *table_data, GArray *linker, AcpiMiscInfo *misc)
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{
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- void *dsdt;
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+ AcpiTableHeader *dsdt;
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+
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assert(misc->dsdt_code && misc->dsdt_size);
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+
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dsdt = acpi_data_push(table_data, misc->dsdt_size);
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memcpy(dsdt, misc->dsdt_code, misc->dsdt_size);
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+
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+ memset(dsdt, 0, sizeof *dsdt);
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+ build_header(linker, table_data, dsdt, ACPI_DSDT_SIGNATURE,
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+ misc->dsdt_size, 1);
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}
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/* Build final rsdt table */
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--
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1.8.3.1
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