From 5375e874c7634f0e1795ec4b37260b724d481e86 Mon Sep 17 00:00:00 2001 From: Kevin Hao Date: Thu, 2 Apr 2020 22:37:49 +0800 Subject: [PATCH 1/7] iommu: Fix the memory leak in dev_iommu_free() In iommu_probe_device(), we would invoke dev_iommu_free() to free the dev->iommu after the ->add_device() returns failure. But after commit 72acd9df18f1 ("iommu: Move iommu_fwspec to struct dev_iommu"), we also need to free the iommu_fwspec before the dev->iommu is freed. This fixes the following memory leak reported by kmemleak: unreferenced object 0xffff000bc836c700 (size 128): comm "swapper/0", pid 1, jiffies 4294896304 (age 782.120s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 d8 cd 9b ff 0b 00 ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000df34077b>] kmem_cache_alloc_trace+0x244/0x4b0 [<000000000e560ac0>] iommu_fwspec_init+0x7c/0xb0 [<0000000075eda275>] of_iommu_xlate+0x80/0xe8 [<00000000728d6bf9>] of_pci_iommu_init+0xb0/0xb8 [<00000000d001fe6f>] pci_for_each_dma_alias+0x48/0x190 [<000000006db6bbce>] of_iommu_configure+0x1ac/0x1d0 [<00000000634745f8>] of_dma_configure+0xdc/0x220 [<000000002cbc8ba0>] pci_dma_configure+0x50/0x78 [<00000000cdf6e193>] really_probe+0x8c/0x340 [<00000000fddddc46>] driver_probe_device+0x60/0xf8 [<0000000061bcdb51>] __device_attach_driver+0x8c/0xd0 [<000000009b9ff58e>] bus_for_each_drv+0x80/0xd0 [<000000004b9c8aa3>] __device_attach+0xec/0x148 [<00000000a5c13bf3>] device_attach+0x1c/0x28 [<000000005071e151>] pci_bus_add_device+0x58/0xd0 [<000000002d4f87d1>] pci_bus_add_devices+0x40/0x90 Fixes: 72acd9df18f1 ("iommu: Move iommu_fwspec to struct dev_iommu") Signed-off-by: Kevin Hao Link: https://lore.kernel.org/r/20200402143749.40500-1-haokexin@gmail.com Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 2b471419e26c..54757c404866 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -170,6 +170,7 @@ static struct dev_iommu *dev_iommu_get(struct device *dev) static void dev_iommu_free(struct device *dev) { + iommu_fwspec_free(dev); kfree(dev->iommu); dev->iommu = NULL; } From d1dcb7255c2b0ae77fbe297e4543c6cfff54e9b9 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 10 Apr 2020 16:30:47 +0200 Subject: [PATCH 2/7] iommu/mediatek: Fix MTK_IOMMU dependencies If NO_DMA=y (e.g. Sun-3 all{mod,yes}-config): drivers/iommu/dma-iommu.o: In function `iommu_dma_mmap': dma-iommu.c:(.text+0x836): undefined reference to `dma_pgprot' IOMMU_DMA must not be selected, unless HAS_DMA=y. Hence fix this by making MTK_IOMMU depend on HAS_DMA. While at it, remove the dependency on ARM || ARM64, as that is already implied by the dependency on ARCH_MEDIATEK. Fixes: e93a1695d7fb5513 ("iommu: Enable compile testing for some of drivers") Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20200410143047.19691-1-geert@linux-m68k.org Signed-off-by: Joerg Roedel --- drivers/iommu/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 58b4a4dbfc78..bead9aaea842 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -457,7 +457,7 @@ config S390_AP_IOMMU config MTK_IOMMU bool "MTK IOMMU Support" - depends on ARM || ARM64 || COMPILE_TEST + depends on HAS_DMA depends on ARCH_MEDIATEK || COMPILE_TEST select ARM_DMA_USE_IOMMU select IOMMU_API From 9dd124b63a2e03c85dab42cc009a6fd9b9e571a1 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Tue, 14 Apr 2020 16:26:30 +0200 Subject: [PATCH 3/7] iommu: spapr_tce: Disable compile testing to fix build on book3s_32 config Although SPAPR_TCE_IOMMU itself can be compile tested on certain PowerPC configurations, its presence makes arch/powerpc/kvm/Makefile to select modules which do not build in such configuration. The arch/powerpc/kvm/ modules use kvm_arch.spapr_tce_tables which exists only with CONFIG_PPC_BOOK3S_64. However these modules are selected when COMPILE_TEST and SPAPR_TCE_IOMMU are chosen leading to build failures: In file included from arch/powerpc/include/asm/book3s/64/mmu-hash.h:20:0, from arch/powerpc/kvm/book3s_64_vio_hv.c:22: arch/powerpc/include/asm/book3s/64/pgtable.h:17:0: error: "_PAGE_EXEC" redefined [-Werror] #define _PAGE_EXEC 0x00001 /* execute permission */ In file included from arch/powerpc/include/asm/book3s/32/pgtable.h:8:0, from arch/powerpc/include/asm/book3s/pgtable.h:8, from arch/powerpc/include/asm/pgtable.h:18, from include/linux/mm.h:95, from arch/powerpc/include/asm/io.h:29, from include/linux/io.h:13, from include/linux/irq.h:20, from arch/powerpc/include/asm/hardirq.h:6, from include/linux/hardirq.h:9, from include/linux/kvm_host.h:7, from arch/powerpc/kvm/book3s_64_vio_hv.c:12: arch/powerpc/include/asm/book3s/32/hash.h:29:0: note: this is the location of the previous definition #define _PAGE_EXEC 0x200 /* software: exec allowed */ Fixes: e93a1695d7fb ("iommu: Enable compile testing for some of drivers") Reported-by: Geert Uytterhoeven Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20200414142630.21153-1-krzk@kernel.org Signed-off-by: Joerg Roedel --- drivers/iommu/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index bead9aaea842..2ab07ce17abb 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -362,7 +362,7 @@ config IPMMU_VMSA config SPAPR_TCE_IOMMU bool "sPAPR TCE IOMMU Support" - depends on PPC_POWERNV || PPC_PSERIES || (PPC && COMPILE_TEST) + depends on PPC_POWERNV || PPC_PSERIES select IOMMU_API help Enables bits of IOMMU API required by VFIO. The iommu_ops From b74aa02d7a30ee5e262072a7d6e8deff10b37924 Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit Date: Wed, 22 Apr 2020 08:30:02 -0500 Subject: [PATCH 4/7] iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system Currently, system fails to boot because the legacy interrupt remapping mode does not enable 128-bit IRTE (GA), which is required for x2APIC support. Fix by using AMD_IOMMU_GUEST_IR_LEGACY_GA mode when booting with kernel option amd_iommu_intr=legacy instead. The initialization logic will check GASup and automatically fallback to using AMD_IOMMU_GUEST_IR_LEGACY if GA mode is not supported. Fixes: 3928aa3f5775 ("iommu/amd: Detect and enable guest vAPIC support") Signed-off-by: Suravee Suthikulpanit Link: https://lore.kernel.org/r/1587562202-14183-1-git-send-email-suravee.suthikulpanit@amd.com Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 6be3853a5d97..2b9a67ecc6ac 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2936,7 +2936,7 @@ static int __init parse_amd_iommu_intr(char *str) { for (; *str; ++str) { if (strncmp(str, "legacy", 6) == 0) { - amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY; + amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA; break; } if (strncmp(str, "vapic", 5) == 0) { From ba61c3da00f4a5bf8805aeca1ba5ac3c9bd82e96 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Fri, 1 May 2020 15:24:27 +0800 Subject: [PATCH 5/7] iommu/vt-d: Use right Kconfig option name The CONFIG_ prefix should be added in the code. Fixes: 046182525db61 ("iommu/vt-d: Add Kconfig option to enable/disable scalable mode") Reported-and-tested-by: Kumar, Sanjay K Signed-off-by: Lu Baolu Cc: Ashok Raj Link: https://lore.kernel.org/r/20200501072427.14265-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- drivers/iommu/intel-iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index ef0a5246700e..0182cff2c7ac 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -371,11 +371,11 @@ int dmar_disabled = 0; int dmar_disabled = 1; #endif /* CONFIG_INTEL_IOMMU_DEFAULT_ON */ -#ifdef INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON +#ifdef CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON int intel_iommu_sm = 1; #else int intel_iommu_sm; -#endif /* INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON */ +#endif /* CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON */ int intel_iommu_enabled = 0; EXPORT_SYMBOL_GPL(intel_iommu_enabled); From ae74c19faa7d7996e857e13165bd40fc4a285e0d Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 30 Apr 2020 14:01:20 +0200 Subject: [PATCH 6/7] iommu: Properly export iommu_group_get_for_dev() In commit a7ba5c3d008d ("drivers/iommu: Export core IOMMU API symbols to permit modular drivers") a bunch of iommu symbols were exported, all with _GPL markings except iommu_group_get_for_dev(). That export should also be _GPL like the others. Fixes: a7ba5c3d008d ("drivers/iommu: Export core IOMMU API symbols to permit modular drivers") Signed-off-by: Greg Kroah-Hartman Acked-by: Will Deacon Cc: Joerg Roedel Cc: John Garry Cc: Will Deacon Link: https://lore.kernel.org/r/20200430120120.2948448-1-gregkh@linuxfoundation.org Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 54757c404866..7b375421afba 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1429,7 +1429,7 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) return group; } -EXPORT_SYMBOL(iommu_group_get_for_dev); +EXPORT_SYMBOL_GPL(iommu_group_get_for_dev); struct iommu_domain *iommu_group_default_domain(struct iommu_group *group) { From b52649aee6243ea661905bdc5fbe28cc5f6dec76 Mon Sep 17 00:00:00 2001 From: Tang Bin Date: Sat, 18 Apr 2020 21:47:03 +0800 Subject: [PATCH 7/7] iommu/qcom: Fix local_base status check The function qcom_iommu_device_probe() does not perform sufficient error checking after executing devm_ioremap_resource(), which can result in crashes if a critical error path is encountered. Fixes: 0ae349a0f33f ("iommu/qcom: Add qcom_iommu") Signed-off-by: Tang Bin Reviewed-by: Bjorn Andersson Link: https://lore.kernel.org/r/20200418134703.1760-1-tangbin@cmss.chinamobile.com Signed-off-by: Joerg Roedel --- drivers/iommu/qcom_iommu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c index 0e2a96467767..5b3b270972f8 100644 --- a/drivers/iommu/qcom_iommu.c +++ b/drivers/iommu/qcom_iommu.c @@ -824,8 +824,11 @@ static int qcom_iommu_device_probe(struct platform_device *pdev) qcom_iommu->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res) + if (res) { qcom_iommu->local_base = devm_ioremap_resource(dev, res); + if (IS_ERR(qcom_iommu->local_base)) + return PTR_ERR(qcom_iommu->local_base); + } qcom_iommu->iface_clk = devm_clk_get(dev, "iface"); if (IS_ERR(qcom_iommu->iface_clk)) {