Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20160115' into staging

target-arm queue:
 * use the right MMU index when handling unaligned accesses
 * xlnx-zynqmp: Add support for high DDR memory regions
 * target-arm: support QMP dump-guest-memory
 * ARM: virt: Don't generate RTC ACPI device when using UEFI

# gpg: Signature made Fri 15 Jan 2016 15:16:19 GMT using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"

* remotes/pmaydell/tags/pull-target-arm-20160115:
  ARM: virt: Don't generate RTC ACPI device when using UEFI
  target-arm: dump-guest-memory: add vfp notes for arm
  elf: add arm note types
  target-arm: dump-guest-memory: add prfpreg notes for aarch64
  target-arm: support QMP dump-guest-memory
  dump: allow target to set the physical base
  dump: allow target to set the page size
  dump: qemunotes aren't commonly needed
  qapi-schema: dump-guest-memory: Improve text
  xlnx-zynqmp: Add support for high DDR memory regions
  target-arm: Use the right MMU index in arm_regime_using_lpae_format

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 5 insertions, 19 deletions

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 0caf5ced69..0d5c635cc8 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -94,23 +94,6 @@ static void acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
     aml_append(scope, dev);
 }
 
-static void acpi_dsdt_add_rtc(Aml *scope, const MemMapEntry *rtc_memmap,
-                                          uint32_t rtc_irq)
-{
-    Aml *dev = aml_device("RTC0");
-    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0013")));
-    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
-
-    Aml *crs = aml_resource_template();
-    aml_append(crs, aml_memory32_fixed(rtc_memmap->base,
-                                       rtc_memmap->size, AML_READ_WRITE));
-    aml_append(crs,
-               aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
-                             AML_EXCLUSIVE, &rtc_irq, 1));
-    aml_append(dev, aml_name_decl("_CRS", crs));
-    aml_append(scope, dev);
-}
-
 static void acpi_dsdt_add_flash(Aml *scope, const MemMapEntry *flash_memmap)
 {
     Aml *dev, *crs;
@@ -571,12 +554,15 @@ build_dsdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
     /* Reserve space for header */
     acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
 
+    /* When booting the VM with UEFI, UEFI takes ownership of the RTC hardware.
+     * While UEFI can use libfdt to disable the RTC device node in the DTB that
+     * it passes to the OS, it cannot modify AML. Therefore, we won't generate
+     * the RTC ACPI device at all when using UEFI.
+     */
     scope = aml_scope("\\_SB");
     acpi_dsdt_add_cpus(scope, guest_info->smp_cpus);
     acpi_dsdt_add_uart(scope, &memmap[VIRT_UART],
                        (irqmap[VIRT_UART] + ARM_SPI_BASE));
-    acpi_dsdt_add_rtc(scope, &memmap[VIRT_RTC],
-                      (irqmap[VIRT_RTC] + ARM_SPI_BASE));
     acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
     acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
                     (irqmap[VIRT_MMIO] + ARM_SPI_BASE), NUM_VIRTIO_TRANSPORTS);