[Qemu-devel] [PULL 50/59] pc: acpi: q35: move PCI0._OSC() method into SSDT

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

From: Igor Mammedov <imammedo@redhat.com>

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      | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 hw/i386/q35-acpi-dsdt.dsl | 57 -----------------------------------------------
 2 files changed, 56 insertions(+), 57 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 55ea84d..29abb99 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1896,6 +1896,54 @@ static void build_piix4_pci_hotplug(Aml *table)
     aml_append(table, scope);
 }
 
+static Aml *build_q35_osc_method(void)
+{
+    Aml *if_ctx;
+    Aml *if_ctx2;
+    Aml *else_ctx;
+    Aml *method;
+    Aml *a_cwd1 = aml_name("CDW1");
+    Aml *a_ctrl = aml_name("CTRL");
+
+    method = aml_method("_OSC", 4, AML_NOTSERIALIZED);
+    aml_append(method, aml_create_dword_field(aml_arg(3), aml_int(0), "CDW1"));
+
+    if_ctx = aml_if(aml_equal(
+        aml_arg(0), aml_touuid("33DB4D5B-1FF7-401C-9657-7441C03DD766")));
+    aml_append(if_ctx, aml_create_dword_field(aml_arg(3), aml_int(4), "CDW2"));
+    aml_append(if_ctx, aml_create_dword_field(aml_arg(3), aml_int(8), "CDW3"));
+
+    aml_append(if_ctx, aml_store(aml_name("CDW2"), aml_name("SUPP")));
+    aml_append(if_ctx, aml_store(aml_name("CDW3"), a_ctrl));
+
+    /*
+     * Always allow native PME, AER (no dependencies)
+     * Never allow SHPC (no SHPC controller in this system)
+     */
+    aml_append(if_ctx, aml_and(a_ctrl, aml_int(0x1D), a_ctrl));
+
+    if_ctx2 = aml_if(aml_lnot(aml_equal(aml_arg(1), aml_int(1))));
+    /* Unknown revision */
+    aml_append(if_ctx2, aml_or(a_cwd1, aml_int(0x08), a_cwd1));
+    aml_append(if_ctx, if_ctx2);
+
+    if_ctx2 = aml_if(aml_lnot(aml_equal(aml_name("CDW3"), a_ctrl)));
+    /* Capabilities bits were masked */
+    aml_append(if_ctx2, aml_or(a_cwd1, aml_int(0x10), a_cwd1));
+    aml_append(if_ctx, if_ctx2);
+
+    /* Update DWORD3 in the buffer */
+    aml_append(if_ctx, aml_store(a_ctrl, aml_name("CDW3")));
+    aml_append(method, if_ctx);
+
+    else_ctx = aml_else();
+    /* Unrecognized UUID */
+    aml_append(else_ctx, aml_or(a_cwd1, aml_int(4), a_cwd1));
+    aml_append(method, else_ctx);
+
+    aml_append(method, aml_return(aml_arg(3)));
+    return method;
+}
 
 static void
 build_ssdt(GArray *table_data, GArray *linker,
@@ -1934,6 +1982,14 @@ build_ssdt(GArray *table_data, GArray *linker,
         build_piix4_pci_hotplug(ssdt);
         build_piix4_pci0_int(ssdt);
     } else {
+        sb_scope = aml_scope("_SB");
+        scope = aml_scope("PCI0");
+        aml_append(scope, aml_name_decl("SUPP", aml_int(0)));
+        aml_append(scope, aml_name_decl("CTRL", aml_int(0)));
+        aml_append(scope, build_q35_osc_method());
+        aml_append(sb_scope, scope);
+        aml_append(ssdt, sb_scope);
+
         build_hpet_aml(ssdt);
         build_q35_isa_bridge(ssdt);
         build_isa_devices_aml(ssdt);
diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
index 7c7aef7..b53663c 100644
--- a/hw/i386/q35-acpi-dsdt.dsl
+++ b/hw/i386/q35-acpi-dsdt.dsl
@@ -53,63 +53,6 @@ DefinitionBlock (
             Name(_CID, EisaId("PNP0A03"))
             Name(_ADR, 0x00)
             Name(_UID, 1)
-
-            External(ISA, DeviceObj)
-
-            // _OSC: based on sample of ACPI3.0b spec
-            Name(SUPP, 0) // PCI _OSC Support Field value
-            Name(CTRL, 0) // PCI _OSC Control Field value
-            Method(_OSC, 4) {
-                // Create DWORD-addressable fields from the Capabilities Buffer
-                CreateDWordField(Arg3, 0, CDW1)
-
-                // Check for proper UUID
-                If (LEqual(Arg0, ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766"))) {
-                    // Create DWORD-addressable fields from the Capabilities Buffer
-                    CreateDWordField(Arg3, 4, CDW2)
-                    CreateDWordField(Arg3, 8, CDW3)
-
-                    // Save Capabilities DWORD2 & 3
-                    Store(CDW2, SUPP)
-                    Store(CDW3, CTRL)
-
-                    // Always allow native PME, AER (no dependencies)
-                    // Never allow SHPC (no SHPC controller in this system)
-                    And(CTRL, 0x1D, CTRL)
-
-#if 0 // For now, nothing to do
-                    If (Not(And(CDW1, 1))) { // Query flag clear?
-                        // Disable GPEs for features granted native control.
-                        If (And(CTRL, 0x01)) { // Hot plug control granted?
-                            Store(0, HPCE) // clear the hot plug SCI enable bit
-                            Store(1, HPCS) // clear the hot plug SCI status bit
-                        }
-                        If (And(CTRL, 0x04)) { // PME control granted?
-                            Store(0, PMCE) // clear the PME SCI enable bit
-                            Store(1, PMCS) // clear the PME SCI status bit
-                        }
-                        If (And(CTRL, 0x10)) { // OS restoring PCI Express cap structure?
-                            // Set status to not restore PCI Express cap structure
-                            // upon resume from S3
-                            Store(1, S3CR)
-                        }
-                    }
-#endif
-                    If (LNotEqual(Arg1, One)) {
-                        // Unknown revision
-                        Or(CDW1, 0x08, CDW1)
-                    }
-                    If (LNotEqual(CDW3, CTRL)) {
-                        // Capabilities bits were masked
-                        Or(CDW1, 0x10, CDW1)
-                    }
-                    // Update DWORD3 in the buffer
-                    Store(CTRL, CDW3)
-                } Else {
-                    Or(CDW1, 4, CDW1) // Unrecognized UUID
-                }
-                Return (Arg3)
-            }
         }
     }
 }
-- 
MST