[PATCH v5 03/16] libxl/arm: Generate static ACPI DSDT table

[Shannon Zhao <zhaoshenglong@huawei.com>]

From: Shannon Zhao <shannon.zhao@linaro.org>

It uses static DSDT table like the way x86 uses. Currently the DSDT
table only contains processor device objects and it generates the
maximal objects which so far is 128.

While the GUEST_MAX_VCPUS is defined under __XEN__ or __XEN_TOOLS__, it
needs to add -D__XEN_TOOLS__ to compile mk_dsdt.c.

Also only check iasl for aarch64 in configure since ACPI on ARM32 is not
supported.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
Note: this patch needs to be rebased on Boris's v3 patchset for only 
generating dsdt_anycpu_arm.c for ARM64.
---
 tools/configure.ac            |  2 +-
 tools/libacpi/Makefile        | 13 ++++++++++++-
 tools/libacpi/mk_dsdt.c       | 27 ++++++++++++++++++++++++++-
 tools/libxl/Makefile          |  5 ++++-
 tools/libxl/libxl_arm_acpi.c  |  5 +++++
 xen/arch/arm/domain.c         |  1 +
 xen/include/public/arch-arm.h |  3 +++
 7 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/tools/configure.ac b/tools/configure.ac
index 0229d44..b4e0c80 100644
--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -335,7 +335,7 @@ dnl "host" here means the platform on which the hypervisor and tools is
 dnl going to run, not the platform on which we are building (known as
 dnl "build" in gnu speak).
 case "$host_cpu" in
-i[[3456]]86|x86_64)
+i[[3456]]86|x86_64|aarch64)
     AX_PATH_PROG_OR_FAIL([IASL], [iasl])
     ;;
 esac
diff --git a/tools/libacpi/Makefile b/tools/libacpi/Makefile
index d741ac5..b1965cc 100644
--- a/tools/libacpi/Makefile
+++ b/tools/libacpi/Makefile
@@ -19,6 +19,7 @@ MK_DSDT = $(ACPI_BUILD_DIR)/mk_dsdt
 
 # Sources to be generated
 C_SRC = $(addprefix $(ACPI_BUILD_DIR)/, dsdt_anycpu.c dsdt_15cpu.c  dsdt_anycpu_qemu_xen.c dsdt_pvh.c)
+C_SRC += $(ACPI_BUILD_DIR)/dsdt_anycpu_arm.c
 H_SRC = $(addprefix $(ACPI_BUILD_DIR)/, ssdt_s3.h ssdt_s4.h ssdt_pm.h ssdt_tpm.h)
 
 vpath iasl $(PATH)
@@ -32,7 +33,7 @@ $(H_SRC): $(ACPI_BUILD_DIR)/%.h: %.asl iasl
 	cd $(CURDIR)
 
 $(MK_DSDT): mk_dsdt.c
-	$(HOSTCC) $(HOSTCFLAGS) $(CFLAGS_xeninclude) -o $@ mk_dsdt.c
+	$(HOSTCC) $(HOSTCFLAGS) $(CFLAGS_xeninclude) -D__XEN_TOOLS__ -o $@ mk_dsdt.c
 
 $(ACPI_BUILD_DIR)/dsdt_anycpu_qemu_xen.asl: dsdt.asl dsdt_acpi_info.asl $(MK_DSDT)
 	awk 'NR > 1 {print s} {s=$$0}' $< > $@
@@ -62,6 +63,16 @@ $(ACPI_BUILD_DIR)/dsdt_pvh.c: iasl $(ACPI_BUILD_DIR)/dsdt_pvh.asl
 	echo "int dsdt_pvh_len=sizeof(dsdt_pvh);" >>$@
 	rm -f $(ACPI_BUILD_DIR)/$*.aml $(ACPI_BUILD_DIR)/$*.hex
 
+$(ACPI_BUILD_DIR)/dsdt_anycpu_arm.asl: $(MK_DSDT)
+	printf "DefinitionBlock (\"DSDT.aml\", \"DSDT\", 3, \"Xen\", \"ARM\", 1)\n{" > $@
+	$(MK_DSDT) --debug=$(debug) >> $@
+
+$(ACPI_BUILD_DIR)/dsdt_anycpu_arm.c: iasl $(ACPI_BUILD_DIR)/dsdt_anycpu_arm.asl
+	iasl -vs -p $(ACPI_BUILD_DIR)/$* -tc $(ACPI_BUILD_DIR)/dsdt_anycpu_arm.asl
+	sed -e 's/AmlCode/dsdt_anycpu_arm/g' $(ACPI_BUILD_DIR)/$*.hex >$@
+	echo "int dsdt_anycpu_arm_len=sizeof(dsdt_anycpu_arm);" >>$@
+	rm -f $(ACPI_BUILD_DIR)/$*.aml $(ACPI_BUILD_DIR)/$*.hex
+
 iasl:
 	@echo
 	@echo "ACPI ASL compiler (iasl) is needed"
diff --git a/tools/libacpi/mk_dsdt.c b/tools/libacpi/mk_dsdt.c
index 7d76784..a56e0f0 100644
--- a/tools/libacpi/mk_dsdt.c
+++ b/tools/libacpi/mk_dsdt.c
@@ -17,7 +17,11 @@
 #include <getopt.h>
 #include <stdlib.h>
 #include <stdbool.h>
+#if defined(__i386__) || defined(__x86_64__)
 #include <xen/hvm/hvm_info_table.h>
+#elif defined(__aarch64__)
+#include <xen/arch-arm.h>
+#endif
 
 static unsigned int indent_level;
 static bool debug = false;
@@ -104,10 +108,16 @@ static struct option options[] = {
 
 int main(int argc, char **argv)
 {
-    unsigned int slot, dev, intx, link, cpu, max_cpus = HVM_MAX_VCPUS;
+    unsigned int slot, dev, intx, link, cpu, max_cpus;
     dm_version dm_version = QEMU_XEN_TRADITIONAL;
     bool no_dm = 0;
 
+#if defined(__i386__) || defined(__x86_64__)
+    max_cpus = HVM_MAX_VCPUS;
+#elif defined(__aarch64__)
+    max_cpus = GUEST_MAX_VCPUS;
+#endif
+
     for ( ; ; )
     {
         int opt = getopt_long(argc, argv, "", options, NULL);
@@ -161,6 +171,7 @@ int main(int argc, char **argv)
     /**** Processor start ****/
     push_block("Scope", "\\_SB");
 
+#if defined(__i386__) || defined(__x86_64__)
     /* MADT checksum */
     stmt("OperationRegion", "MSUM, SystemMemory, \\_SB.MSUA, 1");
     push_block("Field", "MSUM, ByteAcc, NoLock, Preserve");
@@ -174,6 +185,7 @@ int main(int argc, char **argv)
     pop_block();
     stmt("Return", "Buffer() {0, 8, 0xff, 0xff, 0, 0, 0, 0}");
     pop_block();
+#endif
 
     /* Define processor objects and control methods. */
     for ( cpu = 0; cpu < max_cpus; cpu++)
@@ -182,6 +194,11 @@ int main(int argc, char **argv)
 
         stmt("Name", "_HID, \"ACPI0007\"");
 
+        stmt("Name", "_UID, %d", cpu);
+#if defined(__aarch64__)
+        pop_block();
+        continue;
+#endif
         /* Name this processor's MADT LAPIC descriptor. */
         stmt("OperationRegion", 
              "MATR, SystemMemory, Add(\\_SB.MAPA, %d), 8", cpu*8);
@@ -220,6 +237,14 @@ int main(int argc, char **argv)
         pop_block();
     }
 
+#if defined(__aarch64__)
+    pop_block();
+    /**** Processor end ****/
+    pop_block();
+    /**** DSDT DefinitionBlock end ****/
+    return 0;
+#endif
+
     /* Operation Region 'PRST': bitmask of online CPUs. */
     stmt("OperationRegion", "PRST, SystemIO, 0xaf00, 32");
     push_block("Field", "PRST, ByteAcc, NoLock, Preserve");
diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
index afd93de..15a9046 100644
--- a/tools/libxl/Makefile
+++ b/tools/libxl/Makefile
@@ -91,7 +91,10 @@ acpi:
 LIBXL_OBJS-$(CONFIG_X86) += libxl_cpuid.o libxl_x86.o libxl_psr.o libxl_x86_acpi.o
 LIBXL_OBJS-$(CONFIG_ARM) += libxl_nocpuid.o libxl_arm.o libxl_libfdt_compat.o
 ifeq ($(CONFIG_ARM_64),y)
-LIBXL_OBJS-y += libxl_arm_acpi.o
+LIBXL_OBJS-y += libxl_arm_acpi.o dsdt_anycpu_arm.o
+dsdt_anycpu_arm.c:
+	$(MAKE) -C $(ACPI_PATH) ACPI_BUILD_DIR=$(CURDIR)
+
 libxl_arm_acpi.o: libxl_arm_acpi.c
 	$(CC) -c $(CFLAGS) -I../../xen/include/ -o $@ libxl_arm_acpi.c
 else
diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
index 810aed8..0851411 100644
--- a/tools/libxl/libxl_arm_acpi.c
+++ b/tools/libxl/libxl_arm_acpi.c
@@ -29,6 +29,11 @@ typedef uint64_t u64;
 #include <acpi/acconfig.h>
 #include <acpi/actbl.h>
 
+_hidden
+extern const unsigned char dsdt_anycpu_arm[];
+_hidden
+extern const int dsdt_anycpu_arm_len;
+
 int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
                         libxl__domain_build_state *state,
                         struct xc_dom_image *dom)
diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 61fc08e..234d994 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -548,6 +548,7 @@ int arch_domain_create(struct domain *d, unsigned int domcr_flags,
 {
     int rc;
 
+    BUILD_BUG_ON(GUEST_MAX_VCPUS < MAX_VIRT_CPUS);
     d->arch.relmem = RELMEM_not_started;
 
     /* Idle domains do not need this setup */
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 4b4c959..1bef2ee 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -435,6 +435,9 @@ typedef uint64_t xen_callback_t;
 #define GUEST_RAM_BANK_BASES   { GUEST_RAM0_BASE, GUEST_RAM1_BASE }
 #define GUEST_RAM_BANK_SIZES   { GUEST_RAM0_SIZE, GUEST_RAM1_SIZE }
 
+/* Current supported guest VCPUs */
+#define GUEST_MAX_VCPUS 128
+
 /* Interrupts */
 #define GUEST_TIMER_VIRT_PPI    27
 #define GUEST_TIMER_PHYS_S_PPI  29
-- 
2.0.4



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