[Xen-devel] [PATCH] tools/libacpi: set FADT boot flag to notify lack of VGA for PVHv2 guests

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

PVHv2 guests don't have any VGA card, and as so it must be notified in the FADT.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: boris.ostrovsky@xxxxxxxxxx
Cc: konrad.wilk@xxxxxxxxxx
---
 tools/firmware/hvmloader/util.c | 3 ++-
 tools/libacpi/acpi2_0.h         | 1 +
 tools/libacpi/build.c           | 2 ++
 tools/libacpi/libacpi.h         | 1 +
 4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/util.c
index 6e0cfe7..3e192bf 100644
--- a/tools/firmware/hvmloader/util.c
+++ b/tools/firmware/hvmloader/util.c
@@ -948,7 +948,8 @@ void hvmloader_acpi_build_tables(struct acpi_config *config,
     if ( !strncmp(xenstore_read("platform/acpi_s4", "1"), "1", 1)  )
         config->table_flags |= ACPI_HAS_SSDT_S4;
 
-    config->table_flags |= (ACPI_HAS_TCPA | ACPI_HAS_IOAPIC | ACPI_HAS_WAET);
+    config->table_flags |= (ACPI_HAS_TCPA | ACPI_HAS_IOAPIC | ACPI_HAS_WAET |
+                            ACPI_HAS_VGA);
 
     config->tis_hdr = (uint16_t *)ACPI_TIS_HDR_ADDRESS;
 
diff --git a/tools/libacpi/acpi2_0.h b/tools/libacpi/acpi2_0.h
index 775eb7a..aeb95a7 100644
--- a/tools/libacpi/acpi2_0.h
+++ b/tools/libacpi/acpi2_0.h
@@ -229,6 +229,7 @@ struct acpi_20_fadt {
  */
 #define ACPI_LEGACY_DEVICES (1 << 0)
 #define ACPI_8042           (1 << 1)
+#define ACPI_FADT_NO_VGA    (1 << 2)
 
 /*
  * FADT Fixed Feature Flags.
diff --git a/tools/libacpi/build.c b/tools/libacpi/build.c
index 47dae01..8799e2c 100644
--- a/tools/libacpi/build.c
+++ b/tools/libacpi/build.c
@@ -579,6 +579,8 @@ int acpi_build_tables(struct acpi_ctxt *ctxt, struct 
acpi_config *config)
     fadt->x_dsdt = ctxt->mem_ops.v2p(ctxt, dsdt);
     fadt->firmware_ctrl   = ctxt->mem_ops.v2p(ctxt, facs);
     fadt->x_firmware_ctrl = ctxt->mem_ops.v2p(ctxt, facs);
+    if ( !(config->table_flags & ACPI_HAS_VGA) )
+        fadt->iapc_boot_arch |= ACPI_FADT_NO_VGA;
     set_checksum(fadt,
                  offsetof(struct acpi_header, checksum),
                  sizeof(struct acpi_20_fadt));
diff --git a/tools/libacpi/libacpi.h b/tools/libacpi/libacpi.h
index 1d388f9..d7ea6e1 100644
--- a/tools/libacpi/libacpi.h
+++ b/tools/libacpi/libacpi.h
@@ -30,6 +30,7 @@
 #define ACPI_HAS_TCPA        (1<<7)
 #define ACPI_HAS_IOAPIC      (1<<8)
 #define ACPI_HAS_WAET        (1<<9)
+#define ACPI_HAS_VGA         (1<<10)
 
 struct xen_vmemrange;
 struct acpi_numa {
-- 
2.9.3 (Apple Git-75)


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