Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20220128' into staging

target-arm queue:
 * Update copyright dates to 2022
 * hw/armv7m: Fix broken VMStateDescription
 * hw/char/exynos4210_uart: Fix crash on trying to load VM state
 * rtc: Move RTC function prototypes to their own header
 * xlnx-versal-virt: Support PMC SLCR
 * xlnx-versal-virt: Support OSPI flash memory controller
 * scripts: Explain the difference between linux-headers and standard-headers
 * target/arm: Log CPU index in 'Taking exception' log
 * arm_gicv3_its: Various bugfixes and cleanups
 * arm_gicv3_its: Implement the missing MOVI and MOVALL commands
 * ast2600: Fix address mapping of second SPI controller
 * target/arm: Use correct entrypoint for SVC taken from Hyp to Hyp

# gpg: Signature made Fri 28 Jan 2022 15:29:36 GMT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20220128: (32 commits)
  target/arm: Use correct entrypoint for SVC taken from Hyp to Hyp
  hw/arm: ast2600: Fix address mapping of second SPI controller
  hw/intc/arm_gicv3_its: Implement MOVI
  hw/intc/arm_gicv3_its: Implement MOVALL
  hw/intc/arm_gicv3_its: Check table bounds against correct limit
  hw/intc/arm_gicv3_its: Make GITS_BASER<n> RAZ/WI for unimplemented registers
  hw/intc/arm_gicv3_its: Provide read accessor for translation_ops
  hw/intc/arm_gicv3: Set GICR_CTLR.CES if LPIs are supported
  hw/intc/arm_gicv3_redist: Remove unnecessary zero checks
  hw/intc/arm_gicv3_its: Sort ITS command list into numeric order
  hw/intc/arm_gicv3: Honour GICD_CTLR.EnableGrp1NS for LPIs
  hw/intc/arm_gicv3_its: Don't clear GITS_CWRITER on writes to GITS_CBASER
  hw/intc/arm_gicv3_its: Don't clear GITS_CREADR when GITS_CTLR.ENABLED is set
  hw/intc/arm_gicv3: Initialise dma_as in GIC, not ITS
  hw/intc/arm_gicv3_its: Add tracepoints
  target/arm: Log CPU index in 'Taking exception' log
  scripts: Explain the difference between linux-headers and standard-headers
  MAINTAINERS: Remove myself (for raspi).
  MAINTAINERS: Add an entry for Xilinx Versal OSPI
  hw/arm/xlnx-versal-virt: Connect mt35xu01g flashes to the OSPI
  ...

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

1 files changed, 16 insertions, 0 deletions

diff --git a/scripts/update-linux-headers.sh b/scripts/update-linux-headers.sh
index fea4d6eb65..fe850763c5 100755
--- a/scripts/update-linux-headers.sh
+++ b/scripts/update-linux-headers.sh
@@ -9,6 +9,22 @@
 #
 # This work is licensed under the terms of the GNU GPL version 2.
 # See the COPYING file in the top-level directory.
+#
+# The script will copy the headers into two target folders:
+#
+# - linux-headers/ for files that are required for compiling for a
+#   Linux host.  Generally we have these so we can use kernel structs
+#   and defines that are more recent than the headers that might be
+#   installed on the host system.  Usually this script can do simple
+#   file copies for these headers.
+#
+# - include/standard-headers/ for files that are used for guest
+#   device emulation and are required on all hosts.  For instance, we
+#   get our definitions of the virtio structures from the Linux
+#   kernel headers, but we need those definitions regardless of which
+#   host OS we are building for.  This script has to be careful to
+#   sanitize the headers to remove any use of Linux-specifics such as
+#   types like "__u64".  This work is done in the cp_portable function.
 
 tmpdir=$(mktemp -d)
 linux="$1"