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conftest.sh
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conftest.sh
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#!/bin/sh
PATH="${PATH}:/bin:/sbin:/usr/bin"
# make sure we are in the directory containing this script
SCRIPTDIR=`dirname $0`
cd $SCRIPTDIR
CC="$1"
ARCH=$2
ISYSTEM=`$CC -print-file-name=include 2> /dev/null`
SOURCES=$3
HEADERS=$SOURCES/include
OUTPUT=$4
XEN_PRESENT=1
PREEMPT_RT_PRESENT=0
KERNEL_ARCH="$ARCH"
if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]; then
if [ -d "$SOURCES/arch/x86" ]; then
KERNEL_ARCH="x86"
fi
fi
# VGX_BUILD parameter defined only for VGX builds (vGPU Host driver)
# VGX_KVM_BUILD parameter defined only vGPU builds on KVM hypervisor
# GRID_BUILD parameter defined only for GRID builds (GRID Guest driver)
# GRID_BUILD_CSP parameter defined only for GRID CSP builds (GRID Guest driver for CSPs)
test_xen() {
#
# Determine if the target kernel is a Xen kernel. It used to be
# sufficient to check for CONFIG_XEN, but the introduction of
# modular para-virtualization (CONFIG_PARAVIRT, etc.) and
# Xen guest support, it is no longer possible to determine the
# target environment at build time. Therefore, if both
# CONFIG_XEN and CONFIG_PARAVIRT are present, text_xen() treats
# the kernel as a stand-alone kernel.
#
if ! test_configuration_option CONFIG_XEN ||
test_configuration_option CONFIG_PARAVIRT; then
XEN_PRESENT=0
fi
}
append_conftest() {
#
# Echo data from stdin: this is a transitional function to make it easier
# to port conftests from drivers with parallel conftest generation to
# older driver versions
#
while read LINE; do
echo ${LINE}
done
}
translate_and_preprocess_header_files() {
# Inputs:
# $1: list of relative file paths
#
# This routine creates an upper case, underscore version of each of the
# relative file paths, and uses that as the token to either define or
# undefine in a C header file. For example, linux/fence.h becomes
# NV_LINUX_FENCE_H_PRESENT, and that is either defined or undefined, in the
# output (which goes to stdout, just like the rest of this file).
# -MG or -MD can interfere with the use of -M and -M -MG for testing file
# existence; filter out any occurrences from CFLAGS. CFLAGS is intentionally
# wrapped with whitespace in the input to sed(1) so the regex can match zero
# or more occurrences of "-MD" or "-MG", surrounded by whitespace to avoid
# accidental matches with tokens that happen to contain either of those
# strings, without special handling of the beginning or the end of the line.
TEST_CFLAGS=`echo "-E -M $CFLAGS " | sed -e 's/\( -M[DG]\)* / /g'`
for file in "$@"; do
file_define=NV_`echo $file | tr '/.' '_' | tr '-' '_' | tr 'a-z' 'A-Z'`_PRESENT
CODE="#include <$file>"
if echo "$CODE" | $CC $TEST_CFLAGS - > /dev/null 2>&1; then
echo "#define $file_define"
else
# If preprocessing failed, it could have been because the header
# file under test is not present, or because it is present but
# depends upon the inclusion of other header files. Attempting
# preprocessing again with -MG will ignore a missing header file
# but will still fail if the header file is present.
if echo "$CODE" | $CC $TEST_CFLAGS -MG - > /dev/null 2>&1; then
echo "#undef $file_define"
else
echo "#define $file_define"
fi
fi
done
}
test_headers() {
#
# Determine which header files (of a set that may or may not be
# present) are provided by the target kernel.
#
FILES="asm/system.h"
FILES="$FILES drm/drmP.h"
FILES="$FILES drm/drm_auth.h"
FILES="$FILES drm/drm_gem.h"
FILES="$FILES drm/drm_crtc.h"
FILES="$FILES drm/drm_atomic.h"
FILES="$FILES drm/drm_atomic_helper.h"
FILES="$FILES drm/drm_encoder.h"
FILES="$FILES drm/drm_atomic_uapi.h"
FILES="$FILES drm/drm_drv.h"
FILES="$FILES drm/drm_framebuffer.h"
FILES="$FILES drm/drm_connector.h"
FILES="$FILES drm/drm_probe_helper.h"
FILES="$FILES drm/drm_blend.h"
FILES="$FILES drm/drm_fourcc.h"
FILES="$FILES drm/drm_prime.h"
FILES="$FILES drm/drm_plane.h"
FILES="$FILES drm/drm_vblank.h"
FILES="$FILES drm/drm_file.h"
FILES="$FILES drm/drm_ioctl.h"
FILES="$FILES drm/drm_device.h"
FILES="$FILES drm/drm_mode_config.h"
FILES="$FILES drm/drm_aperture.h"
FILES="$FILES dt-bindings/interconnect/tegra_icc_id.h"
FILES="$FILES generated/autoconf.h"
FILES="$FILES generated/compile.h"
FILES="$FILES generated/utsrelease.h"
FILES="$FILES linux/efi.h"
FILES="$FILES linux/kconfig.h"
FILES="$FILES linux/platform/tegra/mc_utils.h"
FILES="$FILES linux/semaphore.h"
FILES="$FILES linux/printk.h"
FILES="$FILES linux/ratelimit.h"
FILES="$FILES linux/prio_tree.h"
FILES="$FILES linux/log2.h"
FILES="$FILES linux/of.h"
FILES="$FILES linux/bug.h"
FILES="$FILES linux/sched/signal.h"
FILES="$FILES linux/sched/task.h"
FILES="$FILES linux/sched/task_stack.h"
FILES="$FILES linux/aperture.h"
FILES="$FILES xen/ioemu.h"
FILES="$FILES linux/fence.h"
FILES="$FILES linux/dma-resv.h"
FILES="$FILES soc/tegra/chip-id.h"
FILES="$FILES soc/tegra/fuse.h"
FILES="$FILES soc/tegra/tegra_bpmp.h"
FILES="$FILES video/nv_internal.h"
FILES="$FILES linux/platform/tegra/dce/dce-client-ipc.h"
FILES="$FILES linux/nvhost.h"
FILES="$FILES linux/nvhost_t194.h"
FILES="$FILES asm/book3s/64/hash-64k.h"
FILES="$FILES asm/set_memory.h"
FILES="$FILES asm/prom.h"
FILES="$FILES asm/powernv.h"
FILES="$FILES linux/atomic.h"
FILES="$FILES asm/barrier.h"
FILES="$FILES asm/opal-api.h"
FILES="$FILES sound/hdaudio.h"
FILES="$FILES asm/pgtable_types.h"
FILES="$FILES linux/stringhash.h"
FILES="$FILES linux/dma-map-ops.h"
FILES="$FILES rdma/peer_mem.h"
FILES="$FILES sound/hda_codec.h"
FILES="$FILES linux/dma-buf.h"
FILES="$FILES linux/time.h"
FILES="$FILES linux/platform_device.h"
FILES="$FILES linux/mutex.h"
FILES="$FILES linux/reset.h"
FILES="$FILES linux/of_platform.h"
FILES="$FILES linux/of_device.h"
FILES="$FILES linux/of_gpio.h"
FILES="$FILES linux/gpio.h"
FILES="$FILES linux/gpio/consumer.h"
FILES="$FILES linux/interconnect.h"
FILES="$FILES linux/pm_runtime.h"
FILES="$FILES linux/clk.h"
FILES="$FILES linux/clk-provider.h"
FILES="$FILES linux/ioasid.h"
FILES="$FILES linux/stdarg.h"
FILES="$FILES linux/iosys-map.h"
FILES="$FILES asm/coco.h"
translate_and_preprocess_header_files $FILES
}
build_cflags() {
BASE_CFLAGS="-O2 -D__KERNEL__ \
-DKBUILD_BASENAME=\"#conftest$$\" -DKBUILD_MODNAME=\"#conftest$$\" \
-nostdinc -isystem $ISYSTEM"
if [ "$OUTPUT" != "$SOURCES" ]; then
OUTPUT_CFLAGS="-I$OUTPUT/include2 -I$OUTPUT/include"
if [ -f "$OUTPUT/include/generated/autoconf.h" ]; then
AUTOCONF_FILE="$OUTPUT/include/generated/autoconf.h"
else
AUTOCONF_FILE="$OUTPUT/include/linux/autoconf.h"
fi
else
if [ -f "$HEADERS/generated/autoconf.h" ]; then
AUTOCONF_FILE="$HEADERS/generated/autoconf.h"
else
AUTOCONF_FILE="$HEADERS/linux/autoconf.h"
fi
fi
test_xen
if [ "$XEN_PRESENT" != "0" ]; then
MACH_CFLAGS="-I$HEADERS/asm/mach-xen"
fi
SOURCE_HEADERS="$HEADERS"
SOURCE_ARCH_HEADERS="$SOURCES/arch/$KERNEL_ARCH/include"
OUTPUT_HEADERS="$OUTPUT/include"
OUTPUT_ARCH_HEADERS="$OUTPUT/arch/$KERNEL_ARCH/include"
# Look for mach- directories on this arch, and add it to the list of
# includes if that platform is enabled in the configuration file, which
# may have a definition like this:
# #define CONFIG_ARCH_<MACHUPPERCASE> 1
for _mach_dir in `ls -1d $SOURCES/arch/$KERNEL_ARCH/mach-* 2>/dev/null`; do
_mach=`echo $_mach_dir | \
sed -e "s,$SOURCES/arch/$KERNEL_ARCH/mach-,," | \
tr 'a-z' 'A-Z'`
grep "CONFIG_ARCH_$_mach \+1" $AUTOCONF_FILE > /dev/null 2>&1
if [ $? -eq 0 ]; then
MACH_CFLAGS="$MACH_CFLAGS -I$_mach_dir/include"
fi
done
if [ "$ARCH" = "arm" ]; then
MACH_CFLAGS="$MACH_CFLAGS -D__LINUX_ARM_ARCH__=7"
fi
# Add the mach-default includes (only found on x86/older kernels)
MACH_CFLAGS="$MACH_CFLAGS -I$SOURCE_HEADERS/asm-$KERNEL_ARCH/mach-default"
MACH_CFLAGS="$MACH_CFLAGS -I$SOURCE_ARCH_HEADERS/asm/mach-default"
CFLAGS="$BASE_CFLAGS $MACH_CFLAGS $OUTPUT_CFLAGS -include $AUTOCONF_FILE"
CFLAGS="$CFLAGS -I$SOURCE_HEADERS"
CFLAGS="$CFLAGS -I$SOURCE_HEADERS/uapi"
CFLAGS="$CFLAGS -I$SOURCE_HEADERS/xen"
CFLAGS="$CFLAGS -I$OUTPUT_HEADERS/generated/uapi"
CFLAGS="$CFLAGS -I$SOURCE_ARCH_HEADERS"
CFLAGS="$CFLAGS -I$SOURCE_ARCH_HEADERS/uapi"
CFLAGS="$CFLAGS -I$OUTPUT_ARCH_HEADERS/generated"
CFLAGS="$CFLAGS -I$OUTPUT_ARCH_HEADERS/generated/uapi"
if [ -n "$BUILD_PARAMS" ]; then
CFLAGS="$CFLAGS -D$BUILD_PARAMS"
fi
# Check if gcc supports asm goto and set CC_HAVE_ASM_GOTO if it does.
# Older kernels perform this check and set this flag in Kbuild, and since
# conftest.sh runs outside of Kbuild it ends up building without this flag.
# Starting with commit e9666d10a5677a494260d60d1fa0b73cc7646eb3 this test
# is done within Kconfig, and the preprocessor flag is no longer needed.
GCC_GOTO_SH="$SOURCES/build/gcc-goto.sh"
if [ -f "$GCC_GOTO_SH" ]; then
# Newer versions of gcc-goto.sh don't print anything on success, but
# this is okay, since it's no longer necessary to set CC_HAVE_ASM_GOTO
# based on the output of those versions of gcc-goto.sh.
if [ `/bin/sh "$GCC_GOTO_SH" "$CC"` = "y" ]; then
CFLAGS="$CFLAGS -DCC_HAVE_ASM_GOTO"
fi
fi
#
# If CONFIG_HAVE_FENTRY is enabled and gcc supports -mfentry flags then set
# CC_USING_FENTRY and add -mfentry into cflags.
#
# linux/ftrace.h file indirectly gets included into the conftest source and
# fails to get compiled, because conftest.sh runs outside of Kbuild it ends
# up building without -mfentry and CC_USING_FENTRY flags.
#
grep "CONFIG_HAVE_FENTRY \+1" $AUTOCONF_FILE > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo "" > conftest$$.c
$CC -mfentry -c -x c conftest$$.c > /dev/null 2>&1
rm -f conftest$$.c
if [ -f conftest$$.o ]; then
rm -f conftest$$.o
CFLAGS="$CFLAGS -mfentry -DCC_USING_FENTRY"
fi
fi
}
CONFTEST_PREAMBLE="#include \"conftest/headers.h\"
#if defined(NV_LINUX_KCONFIG_H_PRESENT)
#include <linux/kconfig.h>
#endif
#if defined(NV_GENERATED_AUTOCONF_H_PRESENT)
#include <generated/autoconf.h>
#else
#include <linux/autoconf.h>
#endif
#if defined(CONFIG_XEN) && \
defined(CONFIG_XEN_INTERFACE_VERSION) && !defined(__XEN_INTERFACE_VERSION__)
#define __XEN_INTERFACE_VERSION__ CONFIG_XEN_INTERFACE_VERSION
#endif
#if defined(CONFIG_KASAN) && defined(CONFIG_ARM64)
#if defined(CONFIG_KASAN_SW_TAGS)
#define KASAN_SHADOW_SCALE_SHIFT 4
#else
#define KASAN_SHADOW_SCALE_SHIFT 3
#endif
#endif"
test_configuration_option() {
#
# Check to see if the given configuration option is defined
#
get_configuration_option $1 >/dev/null 2>&1
return $?
}
set_configuration() {
#
# Set a specific configuration option. This function is called to always
# enable a configuration, in order to verify whether the test code for that
# configuration is no longer required and the corresponding
# conditionally-compiled code in the driver can be removed.
#
DEF="$1"
if [ "$3" = "" ]
then
VAL=""
CAT="$2"
else
VAL="$2"
CAT="$3"
fi
echo "#define ${DEF} ${VAL}" | append_conftest "${CAT}"
}
unset_configuration() {
#
# Un-set a specific configuration option. This function is called to
# always disable a configuration, in order to verify whether the test
# code for that configuration is no longer required and the corresponding
# conditionally-compiled code in the driver can be removed.
#
DEF="$1"
CAT="$2"
echo "#undef ${DEF}" | append_conftest "${CAT}"
}
compile_check_conftest() {
#
# Compile the current conftest C file and check+output the result
#
CODE="$1"
DEF="$2"
VAL="$3"
CAT="$4"
echo "$CONFTEST_PREAMBLE
$CODE" > conftest$$.c
$CC $CFLAGS -c conftest$$.c > /dev/null 2>&1
rm -f conftest$$.c
if [ -f conftest$$.o ]; then
rm -f conftest$$.o
if [ "${CAT}" = "functions" ]; then
#
# The logic for "functions" compilation tests is inverted compared to
# other compilation steps: if the function is present, the code
# snippet will fail to compile because the function call won't match
# the prototype. If the function is not present, the code snippet
# will produce an object file with the function as an unresolved
# symbol.
#
echo "#undef ${DEF}" | append_conftest "${CAT}"
else
echo "#define ${DEF} ${VAL}" | append_conftest "${CAT}"
fi
return
else
if [ "${CAT}" = "functions" ]; then
echo "#define ${DEF} ${VAL}" | append_conftest "${CAT}"
else
echo "#undef ${DEF}" | append_conftest "${CAT}"
fi
return
fi
}
export_symbol_present_conftest() {
#
# Check Module.symvers to see whether the given symbol is present.
#
SYMBOL="$1"
TAB=' '
if grep -e "${TAB}${SYMBOL}${TAB}.*${TAB}EXPORT_SYMBOL.*\$" \
"$OUTPUT/Module.symvers" >/dev/null 2>&1; then
echo "#define NV_IS_EXPORT_SYMBOL_PRESENT_$SYMBOL 1" |
append_conftest "symbols"
else
# May be a false negative if Module.symvers is absent or incomplete,
# or if the Module.symvers format changes.
echo "#define NV_IS_EXPORT_SYMBOL_PRESENT_$SYMBOL 0" |
append_conftest "symbols"
fi
}
export_symbol_gpl_conftest() {
#
# Check Module.symvers to see whether the given symbol is present and its
# export type is GPL-only (including deprecated GPL-only symbols).
#
SYMBOL="$1"
TAB=' '
if grep -e "${TAB}${SYMBOL}${TAB}.*${TAB}EXPORT_\(UNUSED_\)*SYMBOL_GPL\$" \
"$OUTPUT/Module.symvers" >/dev/null 2>&1; then
echo "#define NV_IS_EXPORT_SYMBOL_GPL_$SYMBOL 1" |
append_conftest "symbols"
else
# May be a false negative if Module.symvers is absent or incomplete,
# or if the Module.symvers format changes.
echo "#define NV_IS_EXPORT_SYMBOL_GPL_$SYMBOL 0" |
append_conftest "symbols"
fi
}
get_configuration_option() {
#
# Print the value of given configuration option, if defined
#
RET=1
OPTION=$1
OLD_FILE="linux/autoconf.h"
NEW_FILE="generated/autoconf.h"
FILE=""
if [ -f $HEADERS/$NEW_FILE -o -f $OUTPUT/include/$NEW_FILE ]; then
FILE=$NEW_FILE
elif [ -f $HEADERS/$OLD_FILE -o -f $OUTPUT/include/$OLD_FILE ]; then
FILE=$OLD_FILE
fi
if [ -n "$FILE" ]; then
#
# We are looking at a configured source tree; verify
# that its configuration includes the given option
# via a compile check, and print the option's value.
#
if [ -f $HEADERS/$FILE ]; then
INCLUDE_DIRECTORY=$HEADERS
elif [ -f $OUTPUT/include/$FILE ]; then
INCLUDE_DIRECTORY=$OUTPUT/include
else
return 1
fi
echo "#include <$FILE>
#ifndef $OPTION
#error $OPTION not defined!
#endif
$OPTION
" > conftest$$.c
$CC -E -P -I$INCLUDE_DIRECTORY -o conftest$$ conftest$$.c > /dev/null 2>&1
if [ -e conftest$$ ]; then
tr -d '\r\n\t ' < conftest$$
RET=$?
fi
rm -f conftest$$.c conftest$$
else
CONFIG=$OUTPUT/.config
if [ -f $CONFIG ] && grep "^$OPTION=" $CONFIG; then
grep "^$OPTION=" $CONFIG | cut -f 2- -d "="
RET=$?
fi
fi
return $RET
}
check_for_ib_peer_memory_symbols() {
kernel_dir="$1"
module_symvers="${kernel_dir}/Module.symvers"
sym_ib_register="ib_register_peer_memory_client"
sym_ib_unregister="ib_unregister_peer_memory_client"
tab=' '
# Return 0 for true(no errors), 1 for false
if [ ! -f "${module_symvers}" ]; then
return 1
fi
if grep -e "${tab}${sym_ib_register}${tab}.*${tab}EXPORT_SYMBOL.*\$" \
"${module_symvers}" > /dev/null 2>&1 &&
grep -e "${tab}${sym_ib_unregister}${tab}.*${tab}EXPORT_SYMBOL.*\$" \
"${module_symvers}" > /dev/null 2>&1; then
return 0
else
return 1
fi
}
compile_test() {
case "$1" in
set_memory_uc)
#
# Determine if the set_memory_uc() function is present.
# It does not exist on all architectures.
#
CODE="
#include <linux/types.h>
#if defined(NV_ASM_SET_MEMORY_H_PRESENT)
#if defined(NV_ASM_PGTABLE_TYPES_H_PRESENT)
#include <asm/pgtable_types.h>
#endif
#include <asm/set_memory.h>
#else
#include <asm/cacheflush.h>
#endif
void conftest_set_memory_uc(void) {
set_memory_uc();
}"
compile_check_conftest "$CODE" "NV_SET_MEMORY_UC_PRESENT" "" "functions"
;;
set_memory_array_uc)
#
# Determine if the set_memory_array_uc() function is present.
# It does not exist on all architectures.
#
CODE="
#include <linux/types.h>
#if defined(NV_ASM_SET_MEMORY_H_PRESENT)
#if defined(NV_ASM_PGTABLE_TYPES_H_PRESENT)
#include <asm/pgtable_types.h>
#endif
#include <asm/set_memory.h>
#else
#include <asm/cacheflush.h>
#endif
void conftest_set_memory_array_uc(void) {
set_memory_array_uc();
}"
compile_check_conftest "$CODE" "NV_SET_MEMORY_ARRAY_UC_PRESENT" "" "functions"
;;
sysfs_slab_unlink)
#
# Determine if the sysfs_slab_unlink() function is present.
#
# This test is useful to check for the presence a fix for the deferred
# kmem_cache destroy feature (see nvbug: 2543505).
#
# Added by commit d50d82faa0c9 ("slub: fix failure when we delete and
# create a slab cache") in 4.18 (2018-06-27).
#
CODE="
#include <linux/slab.h>
void conftest_sysfs_slab_unlink(void) {
sysfs_slab_unlink();
}"
compile_check_conftest "$CODE" "NV_SYSFS_SLAB_UNLINK_PRESENT" "" "functions"
;;
list_is_first)
#
# Determine if the list_is_first() function is present.
#
# Added by commit 70b44595eafe ("mm, compaction: use free lists
# to quickly locate a migration source") in 5.1 (2019-03-05)
#
CODE="
#include <linux/list.h>
void conftest_list_is_first(void) {
list_is_first();
}"
compile_check_conftest "$CODE" "NV_LIST_IS_FIRST_PRESENT" "" "functions"
;;
set_pages_uc)
#
# Determine if the set_pages_uc() function is present.
# It does not exist on all architectures.
#
CODE="
#include <linux/types.h>
#if defined(NV_ASM_SET_MEMORY_H_PRESENT)
#if defined(NV_ASM_PGTABLE_TYPES_H_PRESENT)
#include <asm/pgtable_types.h>
#endif
#include <asm/set_memory.h>
#else
#include <asm/cacheflush.h>
#endif
void conftest_set_pages_uc(void) {
set_pages_uc();
}"
compile_check_conftest "$CODE" "NV_SET_PAGES_UC_PRESENT" "" "functions"
;;
set_pages_array_uc)
#
# Determine if the set_pages_array_uc() function is present.
# It does not exist on all architectures.
#
# set_pages_array_uc() was added by commit
# 0f3507555f6fa4acbc85a646d6e8766230db38fc ("x86, CPA: Add
# set_pages_arrayuc and set_pages_array_wb") in v2.6.30-rc1 (Thu Mar
# 19 14:51:15 2009)
#
CODE="
#include <linux/types.h>
#if defined(NV_ASM_SET_MEMORY_H_PRESENT)
#if defined(NV_ASM_PGTABLE_TYPES_H_PRESENT)
#include <asm/pgtable_types.h>
#endif
#include <asm/set_memory.h>
#else
#include <asm/cacheflush.h>
#endif
void conftest_set_pages_array_uc(void) {
set_pages_array_uc();
}"
compile_check_conftest "$CODE" "NV_SET_PAGES_ARRAY_UC_PRESENT" "" "functions"
;;
flush_cache_all)
#
# Determine if flush_cache_all() function is present
#
# flush_cache_all() was removed by commit id
# 68234df4ea79 ("arm64: kill flush_cache_all()") in 4.2 (2015-04-20)
# for aarch64
#
CODE="
#include <asm/cacheflush.h>
int conftest_flush_cache_all(void) {
return flush_cache_all();
}"
compile_check_conftest "$CODE" "NV_FLUSH_CACHE_ALL_PRESENT" "" "functions"
;;
pci_get_domain_bus_and_slot)
#
# Determine if the pci_get_domain_bus_and_slot() function
# is present.
#
# Added by commit 3c299dc22635 ("PCI: add
# pci_get_domain_bus_and_slot function") in 2.6.33.
#
CODE="
#include <linux/pci.h>
void conftest_pci_get_domain_bus_and_slot(void) {
pci_get_domain_bus_and_slot();
}"
compile_check_conftest "$CODE" "NV_PCI_GET_DOMAIN_BUS_AND_SLOT_PRESENT" "" "functions"
;;
pci_bus_address)
#
# Determine if the pci_bus_address() function is
# present.
#
# Added by commit 06cf56e497c8 ("PCI: Add pci_bus_address() to
# get bus address of a BAR") in v3.14
#
CODE="
#include <linux/pci.h>
void conftest_pci_bus_address(void) {
pci_bus_address();
}"
compile_check_conftest "$CODE" "NV_PCI_BUS_ADDRESS_PRESENT" "" "functions"
;;
hash__remap_4k_pfn)
#
# Determine if the hash__remap_4k_pfn() function is
# present.
#
# Added by commit 6cc1a0ee4ce2 ("powerpc/mm/radix: Add radix
# callback for pmd accessors") in v4.7 (committed 2016-04-29).
# Present only in arch/powerpc
#
CODE="
#if defined(NV_ASM_BOOK3S_64_HASH_64K_H_PRESENT)
#include <linux/mm.h>
#include <asm/book3s/64/hash-64k.h>
#endif
void conftest_hash__remap_4k_pfn(void) {
hash__remap_4k_pfn();
}"
compile_check_conftest "$CODE" "NV_HASH__REMAP_4K_PFN_PRESENT" "" "functions"
;;
register_cpu_notifier)
#
# Determine if register_cpu_notifier() is present
#
# Removed by commit 530e9b76ae8f ("cpu/hotplug: Remove obsolete
# cpu hotplug register/unregister functions") in v4.10
# (2016-12-21)
#
CODE="
#include <linux/cpu.h>
void conftest_register_cpu_notifier(void) {
register_cpu_notifier();
}" > conftest$$.c
compile_check_conftest "$CODE" "NV_REGISTER_CPU_NOTIFIER_PRESENT" "" "functions"
;;
cpuhp_setup_state)
#
# Determine if cpuhp_setup_state() is present
#
# Added by commit 5b7aa87e0482 ("cpu/hotplug: Implement
# setup/removal interface") in v4.6 (commited 2016-02-26)
#
# It is used as a replacement for register_cpu_notifier
CODE="
#include <linux/cpu.h>
void conftest_cpuhp_setup_state(void) {
cpuhp_setup_state();
}" > conftest$$.c
compile_check_conftest "$CODE" "NV_CPUHP_SETUP_STATE_PRESENT" "" "functions"
;;
ioremap_cache)
#
# Determine if the ioremap_cache() function is present.
# It does not exist on all architectures.
#
CODE="
#include <asm/io.h>
void conftest_ioremap_cache(void) {
ioremap_cache();
}"
compile_check_conftest "$CODE" "NV_IOREMAP_CACHE_PRESENT" "" "functions"
;;
ioremap_wc)
#
# Determine if the ioremap_wc() function is present.
# It does not exist on all architectures.
#
CODE="
#include <asm/io.h>
void conftest_ioremap_wc(void) {
ioremap_wc();
}"
compile_check_conftest "$CODE" "NV_IOREMAP_WC_PRESENT" "" "functions"
;;
file_operations)
# 'ioctl' field removed by commit b19dd42faf41
# ("bkl: Remove locked .ioctl file operation") in v2.6.36
CODE="
#include <linux/fs.h>
int conftest_file_operations(void) {
return offsetof(struct file_operations, ioctl);
}"
compile_check_conftest "$CODE" "NV_FILE_OPERATIONS_HAS_IOCTL" "" "types"
;;
sg_alloc_table)
#
# sg_alloc_table_from_pages added by commit efc42bc98058
# ("scatterlist: add sg_alloc_table_from_pages function") in v3.6
#
CODE="
#include <linux/scatterlist.h>
void conftest_sg_alloc_table_from_pages(void) {
sg_alloc_table_from_pages();
}"
compile_check_conftest "$CODE" "NV_SG_ALLOC_TABLE_FROM_PAGES_PRESENT" "" "functions"
;;
efi_enabled)
#
# Added in 2.6.12 as a variable
#
# Determine if the efi_enabled symbol is present (as a variable),
# or if the efi_enabled() function is present and how many
# arguments it takes.
#
# Converted from a variable to a function by commit 83e68189745a
# ("efi: Make 'efi_enabled' a function to query EFI facilities")
# in v3.8
#
echo "$CONFTEST_PREAMBLE
#if defined(NV_LINUX_EFI_H_PRESENT)
#include <linux/efi.h>
#endif
int conftest_efi_enabled(void) {
return efi_enabled(0);
}" > conftest$$.c
$CC $CFLAGS -c conftest$$.c > /dev/null 2>&1
rm -f conftest$$.c
if [ -f conftest$$.o ]; then
echo "#define NV_EFI_ENABLED_PRESENT" | append_conftest "functions"
echo "#define NV_EFI_ENABLED_ARGUMENT_COUNT 1" | append_conftest "functions"
rm -f conftest$$.o
return
else
echo "#define NV_EFI_ENABLED_PRESENT" | append_conftest "symbols"
return
fi
;;
dom0_kernel_present)
# Add config parameter if running on DOM0.
if [ -n "$VGX_BUILD" ]; then
echo "#define NV_DOM0_KERNEL_PRESENT" | append_conftest "generic"
else
echo "#undef NV_DOM0_KERNEL_PRESENT" | append_conftest "generic"
fi
return
;;
nvidia_vgpu_kvm_build)
# Add config parameter if running on KVM host.
if [ -n "$VGX_KVM_BUILD" ]; then
echo "#define NV_VGPU_KVM_BUILD" | append_conftest "generic"
else
echo "#undef NV_VGPU_KVM_BUILD" | append_conftest "generic"
fi
return
;;
vfio_register_notifier)
#
# Check number of arguments required.
#
# New parameters added by commit 22195cbd3451 ("vfio:
# vfio_register_notifier: classify iommu notifier") in v4.10
#
echo "$CONFTEST_PREAMBLE
#include <linux/vfio.h>
int conftest_vfio_register_notifier(void) {
return vfio_register_notifier((struct device *) NULL, (struct notifier_block *) NULL);
}" > conftest$$.c
$CC $CFLAGS -c conftest$$.c > /dev/null 2>&1
rm -f conftest$$.c
if [ -f conftest$$.o ]; then
echo "#define NV_VFIO_NOTIFIER_ARGUMENT_COUNT 2" | append_conftest "functions"
rm -f conftest$$.o
return
else
echo "#define NV_VFIO_NOTIFIER_ARGUMENT_COUNT 4" | append_conftest "functions"
return
fi
;;
vfio_info_add_capability_has_cap_type_id_arg)
#
# Check if vfio_info_add_capability() has cap_type_id parameter.
#
# Removed by commit dda01f787df9 ("vfio: Simplify capability
# helper") in v4.16 (2017-12-12)
#
CODE="
#include <linux/vfio.h>
int vfio_info_add_capability(struct vfio_info_cap *caps,
int cap_type_id,
void *cap_type) {
return 0;
}"
compile_check_conftest "$CODE" "NV_VFIO_INFO_ADD_CAPABILITY_HAS_CAP_TYPE_ID_ARGS" "" "types"
;;
vmbus_channel_has_ringbuffer_page)
#
# Check if ringbuffer_page field exist in vmbus_channel structure
#
# Changed in commit 52a42c2a90226dc61c99bbd0cb096deeb52c334b
# ("vmbus: keep pointer to ring buffer page") in v5.0 (2018-09-14)
#
CODE="
#include <linux/hyperv.h>
int conftest_vmbus_channel_has_ringbuffer_page(void) {
return offsetof(struct vmbus_channel, ringbuffer_page);
}"
compile_check_conftest "$CODE" "NV_VMBUS_CHANNEL_HAS_RING_BUFFER_PAGE" "" "types"
;;
nvidia_grid_build)
if [ -n "$GRID_BUILD" ]; then
echo "#define NV_GRID_BUILD" | append_conftest "generic"
else
echo "#undef NV_GRID_BUILD" | append_conftest "generic"
fi
return
;;
nvidia_grid_csp_build)
if [ -n "$GRID_BUILD_CSP" ]; then
echo "#define NV_GRID_BUILD_CSP $GRID_BUILD_CSP" | append_conftest "generic"
else
echo "#undef NV_GRID_BUILD_CSP" | append_conftest "generic"
fi
return
;;
vm_fault_has_address)
#
# Determine if the 'vm_fault' structure has an 'address', or a
# 'virtual_address' field. The .virtual_address field was
# effectively renamed to .address:
#
# 'address' added by commit 82b0f8c39a38 ("mm: join
# struct fault_env and vm_fault") in v4.10 (2016-12-14)
#
# 'virtual_address' removed by commit 1a29d85eb0f1 ("mm: use
# vmf->address instead of of vmf->virtual_address") in v4.10
# (2016-12-14)
#
CODE="
#include <linux/mm.h>
int conftest_vm_fault_has_address(void) {
return offsetof(struct vm_fault, address);
}"
compile_check_conftest "$CODE" "NV_VM_FAULT_HAS_ADDRESS" "" "types"
;;
kmem_cache_has_kobj_remove_work)
#
# Determine if the 'kmem_cache' structure has 'kobj_remove_work'.
#
# 'kobj_remove_work' was added by commit 3b7b314053d02 ("slub: make
# sysfs file removal asynchronous") in v4.12 (2017-06-23). This
# commit introduced a race between kmem_cache destroy and create
# which we need to workaround in our driver (see nvbug: 2543505).
# Also see comment for sysfs_slab_unlink conftest.
#
CODE="
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/slub_def.h>
int conftest_kmem_cache_has_kobj_remove_work(void) {
return offsetof(struct kmem_cache, kobj_remove_work);
}"
compile_check_conftest "$CODE" "NV_KMEM_CACHE_HAS_KOBJ_REMOVE_WORK" "" "types"
;;
mdev_uuid)
#
# Determine if mdev_uuid() function is present or not
#
# Added by commit 99e3123e3d72 ("vfio-mdev: Make mdev_device
# private and abstract interfaces") in v4.10
#
CODE="
#include <linux/pci.h>
#include <linux/mdev.h>