cmd: acpi: check HW reduced flag in acpi list

On non x86 platforms the hardware reduce flag must be set in the FADT
table. Write an error message if the flag is missing.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Rebased on -next to use nomap, add hyphens:
Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/cmd/acpi.c b/cmd/acpi.c
index 1eca7fe7734dcf8e3a12d48f944106857271e84a..65caaa5c98e49068499786ac805d302e3b95e2c0 100644 (file)
--- a/cmd/acpi.c
+++ b/cmd/acpi.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <command.h>
 #include <display_options.h>
+#include <log.h>
 #include <mapmem.h>
 #include <acpi/acpi_table.h>
 #include <asm/acpi_table.h>
@@ -57,6 +58,9 @@ static void list_fadt(struct acpi_fadt *fadt)
                dump_hdr(nomap_sysmem(fadt->x_dsdt, 0));
        else if (fadt->dsdt)
                dump_hdr(nomap_sysmem(fadt->dsdt, 0));
+       if (!IS_ENABLED(CONFIG_X86) &&
+           !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI))
+               log_err("FADT not ACPI-hardware-reduced-compliant\n");
        if (fadt->header.revision >= 3 && fadt->x_firmware_ctrl)
                dump_hdr(nomap_sysmem(fadt->x_firmware_ctrl, 0));
        else if (fadt->firmware_ctrl)