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From 99ac82bfa364eef3e6aa27a12d4eb5e23c7ccfb1 Mon Sep 17 00:00:00 2001
Message-Id: <99ac82bfa364eef3e6aa27a12d4eb5e23c7ccfb1.1387298827.git.minovotn@redhat.com>
In-Reply-To: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
References: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 17 Dec 2013 15:19:02 +0100
Subject: [PATCH 46/56] acpi: add interface to access user-installed tables

RH-Author: Michael S. Tsirkin <mst@redhat.com>
Message-id: <1387293161-4085-47-git-send-email-mst@redhat.com>
Patchwork-id: 56353
O-Subject: [PATCH qemu-kvm RHEL7.0 v2 46/57] acpi: add interface to access user-installed tables
Bugzilla: 1034876
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Marcel Apfelbaum <marcel.a@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>

Also add a new API to install builtin tables, so
that we can distinguish between the two.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 60de1163d5b5013fe964ac0792e9a64a823e73a3)
---
 include/hw/acpi/acpi.h |  4 ++++
 hw/acpi/core.c         | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

Signed-off-by: Michal Novotny <minovotn@redhat.com>
---
 hw/acpi/core.c         | 40 ++++++++++++++++++++++++++++++++++++++++
 include/hw/acpi/acpi.h |  4 ++++
 2 files changed, 44 insertions(+)

diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 42eeace..3352d17 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -309,6 +309,46 @@ out:
     error_propagate(errp, err);
 }
 
+static bool acpi_table_builtin = false;
+
+void acpi_table_add_builtin(const QemuOpts *opts, Error **errp)
+{
+    acpi_table_builtin = true;
+    acpi_table_add(opts, errp);
+}
+
+unsigned acpi_table_len(void *current)
+{
+    struct acpi_table_header *hdr = current - sizeof(hdr->_length);
+    return hdr->_length;
+}
+
+static
+void *acpi_table_hdr(void *h)
+{
+    struct acpi_table_header *hdr = h;
+    return &hdr->sig;
+}
+
+uint8_t *acpi_table_first(void)
+{
+    if (acpi_table_builtin || !acpi_tables) {
+        return NULL;
+    }
+    return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE);
+}
+
+uint8_t *acpi_table_next(uint8_t *current)
+{
+    uint8_t *next = current + acpi_table_len(current);
+
+    if (next - acpi_tables >= acpi_tables_len) {
+        return NULL;
+    } else {
+        return acpi_table_hdr(next);
+    }
+}
+
 static void acpi_notify_wakeup(Notifier *notifier, void *data)
 {
     ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h
index 635be7b..bb7136d 100644
--- a/include/hw/acpi/acpi.h
+++ b/include/hw/acpi/acpi.h
@@ -165,6 +165,10 @@ extern int acpi_enabled;
 extern char unsigned *acpi_tables;
 extern size_t acpi_tables_len;
 
+uint8_t *acpi_table_first(void);
+uint8_t *acpi_table_next(uint8_t *current);
+unsigned acpi_table_len(void *current);
 void acpi_table_add(const QemuOpts *opts, Error **errp);
+void acpi_table_add_builtin(const QemuOpts *opts, Error **errp);
 
 #endif /* !QEMU_HW_ACPI_H */
-- 
1.7.11.7