dm: verify the "iasl" version

This patch does:
- define IASL_MIN_VER in the top-level Makefile and pass it Device Model
- verify the "iasl" version at run time
  if "iasl" version is older than IASL_MIN_VER, refuse to launch the
  post-launched VM and exit directly.

Tracked-On: #7880

Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>

Makefile

@@ -86,6 +86,7 @@ ASL_COMPILER ?= $(shell which iasl)
 DPKG_BIN ?= $(shell which dpkg)
 YARN_BIN ?= $(shell which yarn)
 CARGO_BIN ?= $(shell which cargo)
+IASL_MIN_VER = "20190703"
 
 .PHONY: all hypervisor devicemodel tools life_mngr doc
 all: hypervisor devicemodel tools
@@ -132,7 +133,7 @@ hvapplydiffconfig:
 	@$(MAKE) applydiffconfig $(HV_MAKEOPTS) PATCH=$(abspath $(PATCH))
 
 devicemodel: tools
-	$(MAKE) -C $(T)/devicemodel DM_OBJDIR=$(DM_OUT) DM_BUILD_VERSION=$(BUILD_VERSION) DM_BUILD_TAG=$(BUILD_TAG) TOOLS_OUT=$(TOOLS_OUT) RELEASE=$(RELEASE)
+	$(MAKE) -C $(T)/devicemodel DM_OBJDIR=$(DM_OUT) DM_BUILD_VERSION=$(BUILD_VERSION) DM_BUILD_TAG=$(BUILD_TAG) TOOLS_OUT=$(TOOLS_OUT) RELEASE=$(RELEASE) IASL_MIN_VER=$(IASL_MIN_VER)
 
 tools:
 	mkdir -p $(TOOLS_OUT)

devicemodel/Makefile

@@ -45,6 +45,8 @@ CFLAGS += -I$(SYSROOT)/usr/include/SDL2
 CFLAGS += -I$(SYSROOT)/usr/include/EGL
 CFLAGS += -I$(SYSROOT)/usr/include/GLES2
 
+CFLAGS += -DIASL_MIN_VER=\"$(IASL_MIN_VER)\"
+
 GCC_MAJOR=$(shell echo __GNUC__ | $(CC) -E -x c - | tail -n 1)
 GCC_MINOR=$(shell echo __GNUC_MINOR__ | $(CC) -E -x c - | tail -n 1)
 

devicemodel/core/main.c

@@ -1034,6 +1034,13 @@ main(int argc, char *argv[])
 		exit(1);
 	}
 
+	if (check_iasl_version() != 0) {
+		pr_err("Please install iasl tool with version >= %s from https://www.acpica.org/downloads, "
+			"and provide the path to iasl (by using --iasl) if it's not on the PATH \n",
+			IASL_MIN_VER);
+		exit(1);
+	}
+
 	argc -= optind;
 	argv += optind;
 

devicemodel/hw/platform/acpi/acpi.c

@@ -96,6 +96,9 @@
 #define	ASL_TEMPLATE	"dm.XXXXXXX"
 #define ASL_SUFFIX	".aml"
 
+#define ASL_VER_PATTERN	"ASL+ Optimizing Compiler/Disassembler version "
+#define ASL_VER_STR_LEN	256
+
 static char asl_compiler[MAXPATHLEN] = {0};
 
 uint64_t audio_nhlt_len = 0;
@@ -1150,6 +1153,39 @@ acrn_parse_iasl(char *arg)
 		return -1;
 }
 
+int
+check_iasl_version(void)
+{
+	int ret = -1;
+	static char cmd_iasl_ver[MAXPATHLEN + 10];
+	static char buf[ASL_VER_STR_LEN];
+	char *ver_str, *cp;
+	uint32_t ver, min_ver;
+
+	snprintf(cmd_iasl_ver, sizeof(cmd_iasl_ver),
+		 "%s -v", asl_compiler);
+	FILE *fd_iasl_ver = popen(cmd_iasl_ver, "r");
+
+	if (fd_iasl_ver != NULL)
+	{
+		while (fgets(buf, ASL_VER_STR_LEN, fd_iasl_ver) != NULL) {
+			if (strstr(buf, ASL_VER_PATTERN)) {
+				ver_str = buf + strlen(ASL_VER_PATTERN);
+				pr_info("iasl version: %s", ver_str);
+
+				if ((!dm_strtoui(ver_str, &cp, 10, &ver)) &&
+					(!dm_strtoui(IASL_MIN_VER, &cp, 10, &min_ver)) &&
+					(ver >= min_ver)) {
+					ret = 0;
+				}
+			}
+		}
+
+		pclose(fd_iasl_ver);
+	}
+	return ret;
+}
+
 int
 get_iasl_compiler(void)
 {

devicemodel/include/acpi.h

@@ -123,5 +123,6 @@ int lapic_to_pcpu(int lapic);
 int parse_madt(void);
 int acrn_parse_iasl(char *arg);
 int get_iasl_compiler(void);
+int check_iasl_version(void);
 
 #endif /* _ACPI_H_ */