[Qemu-devel] [PULL 86/96] pc: acpi-build: drop template patching and CPU hotplug objects dynamically

["Michael S. Tsirkin" <mst@redhat.com>]

From: Igor Mammedov <imammedo@redhat.com>

in addition it saves us ~400LOC and makes it
one binary blob less stored in QEMU source
tree by removing need to keep and update
hw/i386/ssdt-proc.hex.generated file there.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/acpi-build.c  | 88 ++++++++++++++++++++++++---------------------------
 hw/i386/Makefile.objs |  7 ++--
 hw/i386/ssdt-proc.dsl | 63 ------------------------------------
 3 files changed, 45 insertions(+), 113 deletions(-)
 delete mode 100644 hw/i386/ssdt-proc.dsl

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 2c581ef..c6910da 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -522,15 +522,6 @@ static inline char acpi_get_hex(uint32_t val)
     return (val <= 9) ? ('0' + val) : ('A' + val - 10);
 }
 
-#include "hw/i386/ssdt-proc.hex"
-
-/* 0x5B 0x83 ProcessorOp PkgLength NameString ProcID */
-#define ACPI_PROC_OFFSET_CPUHEX (*ssdt_proc_name - *ssdt_proc_start + 2)
-#define ACPI_PROC_OFFSET_CPUID1 (*ssdt_proc_name - *ssdt_proc_start + 4)
-#define ACPI_PROC_OFFSET_CPUID2 (*ssdt_proc_id - *ssdt_proc_start)
-#define ACPI_PROC_SIZEOF (*ssdt_proc_end - *ssdt_proc_start)
-#define ACPI_PROC_AML (ssdp_proc_aml + *ssdt_proc_start)
-
 /* 0x5B 0x82 DeviceOp PkgLength NameString */
 #define ACPI_PCIHP_OFFSET_HEX (*ssdt_pcihp_name - *ssdt_pcihp_start + 1)
 #define ACPI_PCIHP_OFFSET_ID (*ssdt_pcihp_id - *ssdt_pcihp_start)
@@ -924,7 +915,7 @@ build_ssdt(GArray *table_data, GArray *linker,
     uint32_t nr_mem = machine->ram_slots;
     unsigned acpi_cpus = guest_info->apic_id_limit;
     uint8_t *ssdt_ptr;
-    Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field;
+    Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field, *ifctx;
     int i;
 
     ssdt = init_aml_allocator();
@@ -1006,51 +997,54 @@ build_ssdt(GArray *table_data, GArray *linker,
     {
         /* build Processor object for each processor */
         for (i = 0; i < acpi_cpus; i++) {
-            uint8_t *proc = acpi_data_push(sb_scope->buf, ACPI_PROC_SIZEOF);
-            memcpy(proc, ACPI_PROC_AML, ACPI_PROC_SIZEOF);
-            proc[ACPI_PROC_OFFSET_CPUHEX] = acpi_get_hex(i >> 4);
-            proc[ACPI_PROC_OFFSET_CPUHEX+1] = acpi_get_hex(i);
-            proc[ACPI_PROC_OFFSET_CPUID1] = i;
-            proc[ACPI_PROC_OFFSET_CPUID2] = i;
+            dev = aml_processor(i, 0, 0, "CP%.02X", i);
+
+            method = aml_method("_MAT", 0);
+            aml_append(method, aml_return(aml_call1("CPMA", aml_int(i))));
+            aml_append(dev, method);
+
+            method = aml_method("_STA", 0);
+            aml_append(method, aml_return(aml_call1("CPST", aml_int(i))));
+            aml_append(dev, method);
+
+            method = aml_method("_EJ0", 1);
+            aml_append(method,
+                aml_return(aml_call2("CPEJ", aml_int(i), aml_arg(0)))
+            );
+            aml_append(dev, method);
+
+            aml_append(sb_scope, dev);
         }
 
         /* build this code:
          *   Method(NTFY, 2) {If (LEqual(Arg0, 0x00)) {Notify(CP00, Arg1)} ...}
          */
         /* Arg0 = Processor ID = APIC ID */
-        build_append_notify_method(sb_scope->buf, "NTFY",
-                                   "CP%0.02X", acpi_cpus);
-
-        /* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })" */
-        build_append_byte(sb_scope->buf, 0x08); /* NameOp */
-        build_append_namestring(sb_scope->buf, "CPON");
-
-        {
-            GArray *package = build_alloc_array();
-            uint8_t op;
-
-            /*
-             * Note: The ability to create variable-sized packages was first introduced in ACPI 2.0. ACPI 1.0 only
-             * allowed fixed-size packages with up to 255 elements.
-             * Windows guests up to win2k8 fail when VarPackageOp is used.
-             */
-            if (acpi_cpus <= 255) {
-                op = 0x12; /* PackageOp */
-                build_append_byte(package, acpi_cpus); /* NumElements */
-            } else {
-                op = 0x13; /* VarPackageOp */
-                build_append_int(package, acpi_cpus); /* VarNumElements */
-            }
-
-            for (i = 0; i < acpi_cpus; i++) {
-                uint8_t b = test_bit(i, cpu->found_cpus) ? 0x01 : 0x00;
-                build_append_byte(package, b);
-            }
+        method = aml_method("NTFY", 2);
+        for (i = 0; i < acpi_cpus; i++) {
+            ifctx = aml_if(aml_equal(aml_arg(0), aml_int(i)));
+            aml_append(ifctx,
+                aml_notify(aml_name("CP%.02X", i), aml_arg(1))
+            );
+            aml_append(method, ifctx);
+        }
+        aml_append(sb_scope, method);
+
+        /* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })"
+         *
+         * Note: The ability to create variable-sized packages was first
+         * ntroduced in ACPI 2.0. ACPI 1.0 only allowed fixed-size packages
+         * ith up to 255 elements. Windows guests up to win2k8 fail when
+         * VarPackageOp is used.
+         */
+        pkg = acpi_cpus <= 255 ? aml_package(acpi_cpus) :
+                                 aml_varpackage(acpi_cpus);
 
-            build_package(package, op);
-            build_append_array(sb_scope->buf, package);
-            build_free_array(package);
+        for (i = 0; i < acpi_cpus; i++) {
+            uint8_t b = test_bit(i, cpu->found_cpus) ? 0x01 : 0x00;
+            aml_append(pkg, aml_int(b));
         }
+        aml_append(sb_scope, aml_name_decl("CPON", pkg));
 
         if (nr_mem) {
             assert(nr_mem <= ACPI_MAX_RAM_SLOTS);
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index 2b678ef..c9af7ba 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -7,10 +7,11 @@ obj-$(CONFIG_XEN) += ../xenpv/ xen/
 
 obj-y += kvmvapic.o
 obj-y += acpi-build.o
-hw/i386/acpi-build.o: hw/i386/acpi-build.c hw/i386/acpi-dsdt.hex \
-	hw/i386/ssdt-proc.hex hw/i386/ssdt-pcihp.hex hw/i386/ssdt-misc.hex \
+hw/i386/acpi-build.o: hw/i386/acpi-build.c \
 	hw/i386/acpi-dsdt.hex hw/i386/q35-acpi-dsdt.hex \
-	hw/i386/q35-acpi-dsdt.hex hw/i386/ssdt-mem.hex \
+	hw/i386/ssdt-pcihp.hex \
+	hw/i386/ssdt-misc.hex \
+	hw/i386/ssdt-mem.hex \
 	hw/i386/ssdt-tpm.hex
 
 iasl-option=$(shell if test -z "`$(1) $(2) 2>&1 > /dev/null`" \
diff --git a/hw/i386/ssdt-proc.dsl b/hw/i386/ssdt-proc.dsl
deleted file mode 100644
index 8229bfd..0000000
--- a/hw/i386/ssdt-proc.dsl
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
-
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
-
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-/* This file is the basis for the ssdt table generated in src/acpi.c.
- * It defines the contents of the per-cpu Processor() object.  At
- * runtime, a dynamically generated SSDT will contain one copy of this
- * AML snippet for every possible cpu in the system.  The objects will
- * be placed in the \_SB_ namespace.
- *
- * In addition to the aml code generated from this file, the
- * src/acpi.c file creates a NTFY method with an entry for each cpu:
- *     Method(NTFY, 2) {
- *         If (LEqual(Arg0, 0x00)) { Notify(CP00, Arg1) }
- *         If (LEqual(Arg0, 0x01)) { Notify(CP01, Arg1) }
- *         ...
- *     }
- * and a CPON array with the list of active and inactive cpus:
- *     Name(CPON, Package() { One, One, ..., Zero, Zero, ... })
- */
-
-ACPI_EXTRACT_ALL_CODE ssdp_proc_aml
-
-DefinitionBlock ("ssdt-proc.aml", "SSDT", 0x01, "BXPC", "BXSSDT", 0x1)
-{
-    ACPI_EXTRACT_PROCESSOR_START ssdt_proc_start
-    ACPI_EXTRACT_PROCESSOR_END ssdt_proc_end
-    ACPI_EXTRACT_PROCESSOR_STRING ssdt_proc_name
-    Processor(CPAA, 0xAA, 0x00000000, 0x0) {
-        ACPI_EXTRACT_NAME_BYTE_CONST ssdt_proc_id
-        Name(ID, 0xAA)
-/*
- * The src/acpi.c code requires the above ACP_EXTRACT tags so that it can update
- * CPAA and 0xAA with the appropriate CPU id (see
- * SD_OFFSET_CPUHEX/CPUID1/CPUID2).  Don't change the above without
- * also updating the C code.
- */
-        Name(_HID, "ACPI0007")
-        External(CPMA, MethodObj)
-        External(CPST, MethodObj)
-        External(CPEJ, MethodObj)
-        Method(_MAT, 0) {
-            Return (CPMA(ID))
-        }
-        Method(_STA, 0) {
-            Return (CPST(ID))
-        }
-        Method(_EJ0, 1, NotSerialized) {
-            CPEJ(ID, Arg0)
-        }
-    }
-}
-- 
MST