asm-generic: build fixes for v5.15

There is one build fix for Arm platforms that ended up impacting most
 architectures because of the way the drivers/firmware Kconfig file is
 wired up:
 
 The CONFIG_QCOM_SCM dependency have caused a number of randconfig
 regressions over time, and some still remain in v5.15-rc4. The
 fix we agreed on in the end is to make this symbol selected by any
 driver using it, and then building it even for non-Arm platforms with
 CONFIG_COMPILE_TEST.
 
 To make this work on all architectures, the drivers/firmware/Kconfig
 file needs to be included for all architectures to make the symbol
 itself visible.
 
 In a separate discussion, we found that a sound driver patch that is
 pending for v5.16 needs the same change to include this Kconfig file,
 so the easiest solution seems to have my Kconfig rework included in v5.15.
 
 There is a small merge conflict against an earlier partial fix for the
 QCOM_SCM dependency problems.
 
 Finally, the branch also includes a small unrelated build fix for NOMMU
 architectures.
 
 Link: https://lore.kernel.org/all/20210928153508.101208f8@canb.auug.org.au/
 Link: https://lore.kernel.org/all/20210928075216.4193128-1-arnd@kernel.org/
 Link: https://lore.kernel.org/all/20211007151010.333516-1-arnd@kernel.org/
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic fixes from Arnd Bergmann:
 "There is one build fix for Arm platforms that ended up impacting most
  architectures because of the way the drivers/firmware Kconfig file is
  wired up:

  The CONFIG_QCOM_SCM dependency have caused a number of randconfig
  regressions over time, and some still remain in v5.15-rc4. The fix we
  agreed on in the end is to make this symbol selected by any driver
  using it, and then building it even for non-Arm platforms with
  CONFIG_COMPILE_TEST.

  To make this work on all architectures, the drivers/firmware/Kconfig
  file needs to be included for all architectures to make the symbol
  itself visible.

  In a separate discussion, we found that a sound driver patch that is
  pending for v5.16 needs the same change to include this Kconfig file,
  so the easiest solution seems to have my Kconfig rework included in
  v5.15.

  Finally, the branch also includes a small unrelated build fix for
  NOMMU architectures"

Link: https://lore.kernel.org/all/20210928153508.101208f8@canb.auug.org.au/
Link: https://lore.kernel.org/all/20210928075216.4193128-1-arnd@kernel.org/
Link: https://lore.kernel.org/all/20211007151010.333516-1-arnd@kernel.org/

* tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic/io.h: give stub iounmap() on !MMU same prototype as elsewhere
  qcom_scm: hide Kconfig symbol
  firmware: include drivers/firmware/Kconfig unconditionally

arch/arm/Kconfig

@@ -1989,8 +1989,6 @@ config ARCH_HIBERNATION_POSSIBLE
 
 endmenu
 
-source "drivers/firmware/Kconfig"
-
 if CRYPTO
 source "arch/arm/crypto/Kconfig"
 endif

arch/arm64/Kconfig

@@ -1931,8 +1931,6 @@ source "drivers/cpufreq/Kconfig"
 
 endmenu
 
-source "drivers/firmware/Kconfig"
-
 source "drivers/acpi/Kconfig"
 
 source "arch/arm64/kvm/Kconfig"

arch/ia64/Kconfig

@@ -388,8 +388,6 @@ config CRASH_DUMP
 	  help
 	    Generate crash dump after being started by kexec.
 
-source "drivers/firmware/Kconfig"
-
 endmenu
 
 menu "Power management and ACPI options"

arch/mips/Kconfig

@@ -3316,8 +3316,6 @@ source "drivers/cpuidle/Kconfig"
 
 endmenu
 
-source "drivers/firmware/Kconfig"
-
 source "arch/mips/kvm/Kconfig"
 
 source "arch/mips/vdso/Kconfig"

arch/parisc/Kconfig

@@ -384,6 +384,4 @@ config KEXEC_FILE
 
 endmenu
 
-source "drivers/firmware/Kconfig"
-
 source "drivers/parisc/Kconfig"

arch/riscv/Kconfig

@@ -561,5 +561,3 @@ menu "Power management options"
 source "kernel/power/Kconfig"
 
 endmenu
-
-source "drivers/firmware/Kconfig"

arch/x86/Kconfig

@@ -2832,8 +2832,6 @@ config HAVE_ATOMIC_IOMAP
 	def_bool y
 	depends on X86_32
 
-source "drivers/firmware/Kconfig"
-
 source "arch/x86/kvm/Kconfig"
 
 source "arch/x86/Kconfig.assembler"

drivers/Kconfig

@@ -17,6 +17,8 @@ source "drivers/bus/Kconfig"
 
 source "drivers/connector/Kconfig"
 
+source "drivers/firmware/Kconfig"
+
 source "drivers/gnss/Kconfig"
 
 source "drivers/mtd/Kconfig"

drivers/firmware/Kconfig

@@ -203,10 +203,7 @@ config INTEL_STRATIX10_RSU
 	  Say Y here if you want Intel RSU support.
 
 config QCOM_SCM
-	tristate "Qcom SCM driver"
+	tristate
-	depends on ARCH_QCOM || COMPILE_TEST
-	depends on HAVE_ARM_SMCCC
-	select RESET_CONTROLLER
 
 config QCOM_SCM_DOWNLOAD_MODE_DEFAULT
 	bool "Qualcomm download mode enabled by default"

drivers/gpu/drm/msm/Kconfig

@@ -17,7 +17,7 @@ config DRM_MSM
 	select DRM_SCHED
 	select SHMEM
 	select TMPFS
-	select QCOM_SCM if ARCH_QCOM
+	select QCOM_SCM
 	select WANT_DEV_COREDUMP
 	select SND_SOC_HDMI_CODEC if SND_SOC
 	select SYNC_FILE
@@ -55,7 +55,7 @@ config DRM_MSM_GPU_SUDO
 
 config DRM_MSM_HDMI_HDCP
 	bool "Enable HDMI HDCP support in MSM DRM driver"
-	depends on DRM_MSM && QCOM_SCM
+	depends on DRM_MSM
 	default y
 	help
 	  Choose this option to enable HDCP state machine

drivers/iommu/Kconfig

@@ -308,7 +308,6 @@ config APPLE_DART
 config ARM_SMMU
 	tristate "ARM Ltd. System MMU (SMMU) Support"
 	depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64)
-	depends on QCOM_SCM || !QCOM_SCM #if QCOM_SCM=m this can't be =y
 	select IOMMU_API
 	select IOMMU_IO_PGTABLE_LPAE
 	select ARM_DMA_USE_IOMMU if ARM
@@ -438,7 +437,7 @@ config QCOM_IOMMU
 	# Note: iommu drivers cannot (yet?) be built as modules
 	bool "Qualcomm IOMMU Support"
 	depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
-	depends on QCOM_SCM=y
+	select QCOM_SCM
 	select IOMMU_API
 	select IOMMU_IO_PGTABLE_LPAE
 	select ARM_DMA_USE_IOMMU

drivers/iommu/arm/arm-smmu/Makefile

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_QCOM_IOMMU) += qcom_iommu.o
 obj-$(CONFIG_ARM_SMMU) += arm_smmu.o
-arm_smmu-objs += arm-smmu.o arm-smmu-impl.o arm-smmu-nvidia.o arm-smmu-qcom.o
+arm_smmu-objs += arm-smmu.o arm-smmu-impl.o arm-smmu-nvidia.o
+arm_smmu-$(CONFIG_ARM_SMMU_QCOM) += arm-smmu-qcom.o

drivers/iommu/arm/arm-smmu/arm-smmu-impl.c

@@ -215,7 +215,8 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
 	    of_device_is_compatible(np, "nvidia,tegra186-smmu"))
 		return nvidia_smmu_impl_init(smmu);
 
-	smmu = qcom_smmu_impl_init(smmu);
+	if (IS_ENABLED(CONFIG_ARM_SMMU_QCOM))
+		smmu = qcom_smmu_impl_init(smmu);
 
 	if (of_device_is_compatible(np, "marvell,ap806-smmu-500"))
 		smmu->impl = &mrvl_mmu500_impl;

drivers/media/platform/Kconfig

@@ -565,7 +565,7 @@ config VIDEO_QCOM_VENUS
 	depends on VIDEO_DEV && VIDEO_V4L2 && QCOM_SMEM
 	depends on (ARCH_QCOM && IOMMU_DMA) || COMPILE_TEST
 	select QCOM_MDT_LOADER if ARCH_QCOM
-	select QCOM_SCM if ARCH_QCOM
+	select QCOM_SCM
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	help

drivers/mmc/host/Kconfig

@@ -547,7 +547,7 @@ config MMC_SDHCI_MSM
 	depends on MMC_SDHCI_PLTFM
 	select MMC_SDHCI_IO_ACCESSORS
 	select MMC_CQHCI
-	select QCOM_SCM if MMC_CRYPTO && ARCH_QCOM
+	select QCOM_SCM if MMC_CRYPTO
 	help
 	  This selects the Secure Digital Host Controller Interface (SDHCI)
 	  support present in Qualcomm SOCs. The controller supports

drivers/net/ipa/Kconfig

@@ -4,6 +4,7 @@ config QCOM_IPA
 	depends on ARCH_QCOM || COMPILE_TEST
 	depends on QCOM_RPROC_COMMON || (QCOM_RPROC_COMMON=n && COMPILE_TEST)
 	select QCOM_MDT_LOADER if ARCH_QCOM
+	select QCOM_SCM
 	select QCOM_QMI_HELPERS
 	help
 	  Choose Y or M here to include support for the Qualcomm

drivers/net/wireless/ath/ath10k/Kconfig

@@ -44,7 +44,7 @@ config ATH10K_SNOC
 	tristate "Qualcomm ath10k SNOC support"
 	depends on ATH10K
 	depends on ARCH_QCOM || COMPILE_TEST
-	depends on QCOM_SCM || !QCOM_SCM #if QCOM_SCM=m this can't be =y
+	select QCOM_SCM
 	select QCOM_QMI_HELPERS
 	help
 	  This module adds support for integrated WCN3990 chip connected

drivers/pinctrl/qcom/Kconfig

@@ -3,7 +3,8 @@ if (ARCH_QCOM || COMPILE_TEST)
 
 config PINCTRL_MSM
 	tristate "Qualcomm core pin controller driver"
-	depends on GPIOLIB && (QCOM_SCM || !QCOM_SCM) #if QCOM_SCM=m this can't be =y
+	depends on GPIOLIB
+	select QCOM_SCM
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF

include/asm-generic/io.h

@@ -957,7 +957,7 @@ static inline void __iomem *ioremap(phys_addr_t offset, size_t size)
 
 #ifndef iounmap
 #define iounmap iounmap
-static inline void iounmap(void __iomem *addr)
+static inline void iounmap(volatile void __iomem *addr)
 {
 }
 #endif

include/linux/arm-smccc.h

@@ -321,10 +321,20 @@ asmlinkage unsigned long __arm_smccc_sve_check(unsigned long x0);
  * from register 0 to 3 on return from the SMC instruction.  An optional
  * quirk structure provides vendor specific behavior.
  */
+#ifdef CONFIG_HAVE_ARM_SMCCC
 asmlinkage void __arm_smccc_smc(unsigned long a0, unsigned long a1,
 			unsigned long a2, unsigned long a3, unsigned long a4,
 			unsigned long a5, unsigned long a6, unsigned long a7,
 			struct arm_smccc_res *res, struct arm_smccc_quirk *quirk);
+#else
+static inline void __arm_smccc_smc(unsigned long a0, unsigned long a1,
+			unsigned long a2, unsigned long a3, unsigned long a4,
+			unsigned long a5, unsigned long a6, unsigned long a7,
+			struct arm_smccc_res *res, struct arm_smccc_quirk *quirk)
+{
+	*res = (struct arm_smccc_res){};
+}
+#endif
 
 /**
  * __arm_smccc_hvc() - make HVC calls

include/linux/qcom_scm.h

@@ -61,7 +61,6 @@ enum qcom_scm_ice_cipher {
 #define QCOM_SCM_PERM_RW (QCOM_SCM_PERM_READ | QCOM_SCM_PERM_WRITE)
 #define QCOM_SCM_PERM_RWX (QCOM_SCM_PERM_RW | QCOM_SCM_PERM_EXEC)
 
-#if IS_ENABLED(CONFIG_QCOM_SCM)
 extern bool qcom_scm_is_available(void);
 
 extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
@@ -115,74 +114,4 @@ extern int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val,
 extern int qcom_scm_lmh_profile_change(u32 profile_id);
 extern bool qcom_scm_lmh_dcvsh_available(void);
 
-#else
-
-#include <linux/errno.h>
-
-static inline bool qcom_scm_is_available(void) { return false; }
-
-static inline int qcom_scm_set_cold_boot_addr(void *entry,
-		const cpumask_t *cpus) { return -ENODEV; }
-static inline int qcom_scm_set_warm_boot_addr(void *entry,
-		const cpumask_t *cpus) { return -ENODEV; }
-static inline void qcom_scm_cpu_power_down(u32 flags) {}
-static inline u32 qcom_scm_set_remote_state(u32 state,u32 id)
-		{ return -ENODEV; }
-
-static inline int qcom_scm_pas_init_image(u32 peripheral, const void *metadata,
-		size_t size) { return -ENODEV; }
-static inline int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
-		phys_addr_t size) { return -ENODEV; }
-static inline int qcom_scm_pas_auth_and_reset(u32 peripheral)
-		{ return -ENODEV; }
-static inline int qcom_scm_pas_shutdown(u32 peripheral) { return -ENODEV; }
-static inline bool qcom_scm_pas_supported(u32 peripheral) { return false; }
-
-static inline int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val)
-		{ return -ENODEV; }
-static inline int qcom_scm_io_writel(phys_addr_t addr, unsigned int val)
-		{ return -ENODEV; }
-
-static inline bool qcom_scm_restore_sec_cfg_available(void) { return false; }
-static inline int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
-		{ return -ENODEV; }
-static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
-		{ return -ENODEV; }
-static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
-		{ return -ENODEV; }
-extern inline int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
-						 u32 cp_nonpixel_start,
-						 u32 cp_nonpixel_size)
-		{ return -ENODEV; }
-static inline int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
-		unsigned int *src, const struct qcom_scm_vmperm *newvm,
-		unsigned int dest_cnt) { return -ENODEV; }
-
-static inline bool qcom_scm_ocmem_lock_available(void) { return false; }
-static inline int qcom_scm_ocmem_lock(enum qcom_scm_ocmem_client id, u32 offset,
-		u32 size, u32 mode) { return -ENODEV; }
-static inline int qcom_scm_ocmem_unlock(enum qcom_scm_ocmem_client id,
-		u32 offset, u32 size) { return -ENODEV; }
-
-static inline bool qcom_scm_ice_available(void) { return false; }
-static inline int qcom_scm_ice_invalidate_key(u32 index) { return -ENODEV; }
-static inline int qcom_scm_ice_set_key(u32 index, const u8 *key, u32 key_size,
-				       enum qcom_scm_ice_cipher cipher,
-				       u32 data_unit_size) { return -ENODEV; }
-
-static inline bool qcom_scm_hdcp_available(void) { return false; }
-static inline int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
-		u32 *resp) { return -ENODEV; }
-
-static inline int qcom_scm_qsmmu500_wait_safe_toggle(bool en)
-		{ return -ENODEV; }
-
-static inline int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val,
-				     u64 limit_node, u32 node_id, u64 version)
-		{ return -ENODEV; }
-
-static inline int qcom_scm_lmh_profile_change(u32 profile_id) { return -ENODEV; }
-
-static inline bool qcom_scm_lmh_dcvsh_available(void) { return -ENODEV; }
-#endif
 #endif