| Message ID | 20200709050145.3520931-2-bjorn.andersson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iommu/arm-smmu: Support maintaining bootloader mappings | expand |
Hi Bjorn,
I love your patch! Perhaps something to improve:
[auto build test WARNING on iommu/next]
[also build test WARNING on arm-perf/for-next/perf v5.8-rc5 next-20200713]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Bjorn-Andersson/iommu-arm-smmu-Support-maintaining-bootloader-mappings/20200709-130417
base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-s021-20200713 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-37-gc9676a3b-dirty
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/iommu/arm-smmu.c:1927:5: sparse: sparse: symbol 'arm_smmu_setup_identity' was not declared. Should it be static?
Please review and possibly fold the followup patch.
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Hi Bjorn,
I love your patch! Perhaps something to improve:
[auto build test WARNING on iommu/next]
[also build test WARNING on arm-perf/for-next/perf v5.8-rc5 next-20200715]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Bjorn-Andersson/iommu-arm-smmu-Support-maintaining-bootloader-mappings/20200709-130417
base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: arm64-randconfig-r022-20200715 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 02946de3802d3bc65bc9f2eb9b8d4969b5a7add8)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/iommu/arm-smmu.c:1927:5: warning: no previous prototype for function 'arm_smmu_setup_identity' [-Wmissing-prototypes]
int arm_smmu_setup_identity(struct arm_smmu_device *smmu)
^
drivers/iommu/arm-smmu.c:1927:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int arm_smmu_setup_identity(struct arm_smmu_device *smmu)
^
static
1 warning generated.
vim +/arm_smmu_setup_identity +1927 drivers/iommu/arm-smmu.c
1926
> 1927 int arm_smmu_setup_identity(struct arm_smmu_device *smmu)
1928 {
1929 int i;
1930
1931 for (i = 0; i < smmu->num_mapping_groups; i++) {
1932 if (smmu->smrs[i].valid) {
1933 smmu->s2crs[i].type = S2CR_TYPE_BYPASS;
1934 smmu->s2crs[i].privcfg = S2CR_PRIVCFG_DEFAULT;
1935 smmu->s2crs[i].cbndx = 0xff;
1936 smmu->s2crs[i].count++;
1937 }
1938 }
1939
1940 return 0;
1941 }
1942
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 243bc4cb2705..2e27cf9815ab 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1924,6 +1924,22 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu) return 0; } +int arm_smmu_setup_identity(struct arm_smmu_device *smmu) +{ + int i; + + for (i = 0; i < smmu->num_mapping_groups; i++) { + if (smmu->smrs[i].valid) { + smmu->s2crs[i].type = S2CR_TYPE_BYPASS; + smmu->s2crs[i].privcfg = S2CR_PRIVCFG_DEFAULT; + smmu->s2crs[i].cbndx = 0xff; + smmu->s2crs[i].count++; + } + } + + return 0; +} + struct arm_smmu_match_data { enum arm_smmu_arch_version version; enum arm_smmu_implementation model; @@ -2181,6 +2197,10 @@ static int arm_smmu_device_probe(struct platform_device *pdev) if (err) return err; + err = arm_smmu_setup_identity(smmu); + if (err) + return err; + if (smmu->version == ARM_SMMU_V2) { if (smmu->num_context_banks > smmu->num_context_irqs) { dev_err(dev,
Turn all stream mappings marked as valid into BYPASS. This allows the platform specific implementation to configure stream mappings to match the boot loader's configuration for e.g. display to continue to function through the reset of the SMMU. Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/iommu/arm-smmu.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)