April 2024 - linux-morello - op-lists.linaro.org

by carsten.haitzler＠foss.arm.com

From: Carsten Haitzler <carsten.haitzler(a)arm.com> This series starts to enable purecap support for drm ioctls. This series enables all the libdrm tests (tested and working). You will also need the purecap libdrm port as well to complement this. Carsten Haitzler (3): drm: Fix copy to/from user so that caps trasnport in the region drm: Fix purecap vblank handling drm: fix up purecap handling of all iotcls in libdrm test tools drivers/gpu/drm/drm_atomic_uapi.c | 3 +- drivers/gpu/drm/drm_connector.c | 107 +++++++++++++++++++------ drivers/gpu/drm/drm_file.c | 2 +- drivers/gpu/drm/drm_internal.h | 4 + drivers/gpu/drm/drm_ioc32.c | 8 +- drivers/gpu/drm/drm_ioctl.c | 20 ++--- drivers/gpu/drm/drm_mode_config.c | 126 +++++++++++++++++++++--------- drivers/gpu/drm/drm_mode_object.c | 37 ++++++++- drivers/gpu/drm/drm_plane.c | 88 +++++++++++++++++---- drivers/gpu/drm/drm_property.c | 87 ++++++++++++++++++--- drivers/gpu/drm/drm_vblank.c | 46 ++++++++--- include/drm/drm_drv.h | 9 +++ include/drm/drm_vblank.h | 23 ++++++ include/uapi/drm/drm.h | 6 +- include/uapi/drm/drm_mode.h | 34 ++++---- tools/include/uapi/drm/drm.h | 4 +- 16 files changed, 458 insertions(+), 146 deletions(-) -- 2.25.1

10 months, 1 week

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[PATCH 00/12] KVM: arm64: morello: Basic support

by Beata Michalska

Hi All, This series adds bare minimum required to support kvm virtual machines. The majority of changes make sure that executing Morello instructions by the hypervisor/guest is safe and that core capability registers are properly set and maintained across context switches. Additionally, support for COMPAT64 allows plain aarch64 tools to still manage virtual machines. Support for purecap guests is yet to come. The changes have been tested with KVM kselftests (in plain aarch64) in their default setup (some of the tests do expose number of options and those have not been fully exercised). The changes are available at: https://git.morello-project.org/Bea/linux/-/tree/morello/kvm_base_2?ref_typ… Beata Michalska (12): KVM: arm64: Provide explicit capability annotations KVM: arm64: morello: Add (V)TCR_EL2 HW field descriptors KVM: arm64: morello: Enable page-based hw attributes arm64/sysreg: morello: Support for capability registers arm64/sysreg: morello: Add capability-aware sysreg helpers KVM: arm64: morello: Add sysreg access capability variants KVM: arm64: morello: Extend the context by capability sysregs KVM: arm64: morello: Provide valid capability on return from exception KVM: arm64: morello: Disable trapping of Morello instructions KVM: arm64: morello: Preserve capabilities on context save / restore KVM: arm64: morello: Enable support for COMPAT64 KVM: arm64: morello: Enable KVM Documentation/virt/kvm/api.rst | 10 +- arch/arm64/include/asm/kvm_arm.h | 12 ++ arch/arm64/include/asm/kvm_asm.h | 108 ++++++++++- arch/arm64/include/asm/kvm_emulate.h | 5 + arch/arm64/include/asm/kvm_host.h | 38 ++++ arch/arm64/include/asm/kvm_hyp.h | 74 ++++++-- arch/arm64/include/asm/kvm_pgtable.h | 20 ++ arch/arm64/include/asm/sysreg.h | 83 +++++++++ arch/arm64/include/uapi/asm/kvm.h | 6 +- arch/arm64/kernel/asm-offsets.c | 3 + arch/arm64/kernel/hyp-stub.S | 5 + arch/arm64/kvm/Kconfig | 1 - arch/arm64/kvm/arch_timer.c | 4 +- arch/arm64/kvm/arm.c | 207 ++++++++++++++------- arch/arm64/kvm/guest.c | 10 +- arch/arm64/kvm/hyp/entry.S | 12 +- arch/arm64/kvm/hyp/include/hyp/switch.h | 4 +- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 58 +++++- arch/arm64/kvm/hyp/nvhe/host.S | 66 ++++++- arch/arm64/kvm/hyp/nvhe/hyp-init.S | 14 ++ arch/arm64/kvm/hyp/nvhe/switch.c | 9 +- arch/arm64/kvm/hyp/nvhe/sys_regs.c | 4 +- arch/arm64/kvm/hyp/pgtable.c | 10 +- arch/arm64/kvm/hyp/vhe/switch.c | 11 +- arch/arm64/kvm/hypercalls.c | 4 +- arch/arm64/kvm/pmu-emul.c | 8 +- arch/arm64/kvm/sys_regs.c | 21 ++- arch/arm64/kvm/vgic/vgic-its.c | 8 +- arch/arm64/kvm/vgic/vgic-kvm-device.c | 11 +- include/linux/kvm_host.h | 8 +- include/uapi/linux/kvm.h | 10 +- tools/arch/arm64/include/uapi/asm/kvm.h | 6 +- tools/include/uapi/linux/kvm.h | 12 +- virt/kvm/Kconfig | 2 +- virt/kvm/kvm_main.c | 99 +++++++--- virt/kvm/vfio.c | 2 +- 36 files changed, 776 insertions(+), 189 deletions(-) -- 2.25.1

10 months, 1 week

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[PATCH] arm64: compat: Create null-derived out-of-bounds pointers

by Kevin Brodsky

In PCuABI, we need compat_ptr() to create a valid capability from an arbitrary compat pointer, to enable uaccess to the underlying memory. However, if the compat pointer is clearly an invalid address, it is preferable to return a null-derived (invalid) capability. This is especially true when the address is null: we clearly want to return the null capability in that case. This should be a non-functional change (uaccess would fail anyway due to the absence of underlying mapping), but it avoids some confusion when debugging compat64 handling (and reduces the creation of capabilities). Signed-off-by: Kevin Brodsky <kevin.brodsky(a)arm.com> --- Review branch: https://git.morello-project.org/kbrodsky-arm/linux/-/commits/morello/null_c… arch/arm64/include/asm/compat.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 4556bed1704f..acf5487985b5 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -93,7 +93,9 @@ static inline void __user *compat_ptr(compat_uptr_t uptr) * TODO [Morello] - this should be done using the current user DDC, not * the root user capability. */ - return (void __user *)cheri_address_set(cheri_user_root_allperms_cap, uptr); + return likely(uptr >= PAGE_SIZE && uptr < TASK_SIZE_MAX) ? + (void __user *)cheri_address_set(cheri_user_root_allperms_cap, uptr) : + as_user_ptr(uptr); } #define compat_ptr(uptr) compat_ptr(uptr) #endif -- 2.43.0

10 months, 1 week

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[PATCH 0/2] Firmware defconfig additions

by Kevin Brodsky

Hi, This is a small series adding various firmware-related options to the Morello defconfig. These options work out of the box in PCuABI (no build or runtime issue). Patch 1 is useful to inspect the EFI configuration on a live system, and is used by tools like bootctl (systemd-boot). Patch 2 enables the DPU to be successfully probed when using the firmware-provided device tree (part of upstream TF-A), as it relies on the DPU clock being provided by SCMI. This should be useful for controlling other functionalities as well (e.g. power management). Review branch: https://git.morello-project.org/kbrodsky-arm/linux/-/commits/morello/defcon… Thanks, Kevin Kevin Brodsky (2): arm64: morello: Enable EFIVAR_FS in defconfig arm64: morello: Enable SCMI in defconfig arch/arm64/configs/morello_transitional_pcuabi_defconfig | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 2.43.0

10 months, 1 week

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[PATCH] arm64/elf: Remove outdated compat64 TODO

by Kevin Brodsky

These definitions were needed to build arch/arm64/kernel/ptrace.c with CONFIG_COMPAT64 a long time ago, before "arm64: ptrace: Support compat64". This is not the case any more, however since "fs/compat_binfmt_elf: Align compat64 with compat32" we do need to define compat_elf_gregset_t to keep linux/elfcore-compat.h happy. This is the correct approach and there is no plan to change it, so let's remove the outdated TODO. Signed-off-by: Kevin Brodsky <kevin.brodsky(a)arm.com> --- arch/arm64/include/asm/elf.h | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h index b54070e80867..63f6f50599e6 100644 --- a/arch/arm64/include/asm/elf.h +++ b/arch/arm64/include/asm/elf.h @@ -209,11 +209,6 @@ extern int purecap_setup_additional_pages(struct linux_binprm *bprm, #define compat_elf_check_arch(x) ((x)->e_machine == EM_AARCH64 && \ !((x)->e_flags & EF_AARCH64_CHERI_PURECAP)) -/* - * TODO [PCuABI]: Redefine below macros and typedefs to let ptrace pick them - * and build. These redefinitions are not permanent and might not be required if - * the ptrace is modified for complete COMPAT64 support. - */ #define COMPAT_ELF_NGREG ELF_NGREG typedef unsigned long compat_elf_greg_t; typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; -- 2.43.0

10 months, 1 week

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[PATCH 0/2] Clean-ups for the latest Morello Clang

by Kevin Brodsky

Hi, This small series aligns the kernel with the latest release of Morello Clang (1.7). Patch 1 removes a warning when building kselftests, while patch 2 simplifies pieces of inline assembly that are not specific to PCuABI, by making use of a relaxation in asm constraints. Review branch: https://git.morello-project.org/kbrodsky-arm/linux/-/commits/morello%2Flate… Thanks, Kevin Kevin Brodsky (2): kselftests/arm64: morello: Drop +c64 from -march arm64: Switch to standard asm constraints for capabilities arch/arm64/include/asm/futex.h | 23 ++++++++----------- arch/arm64/include/asm/uaccess.h | 14 ++++------- arch/arm64/include/asm/vdso/gettimeofday.h | 15 ++++-------- .../testing/selftests/arm64/morello/Makefile | 2 +- 4 files changed, 18 insertions(+), 36 deletions(-) -- 2.43.0

10 months, 1 week

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[PATCH] mmc: ioctl: Remove hard-coded MMC_IOC_{MULTI_}CMD values

by Akram Ahmad

A previous patch which introduced support for capabilities in the MMC_IOC_{MULTI_}CMD ioctls also hard-coded the ioctl values to maintain compatibility with non-PCuABI ioctl handlers such as those found in block.c. This patch therefore removes the hard-coding of these ioctl values, and enforces compatibility by accounting for the change in values if the ioctl handler is running in compat64. Signed-off-by: Akram Ahmad <Akram.Ahmad(a)arm.com> --- drivers/mmc/core/block.c | 21 +++++++++++++++++++++ include/uapi/linux/mmc/ioctl.h | 21 +++++++++------------ 2 files changed, 30 insertions(+), 12 deletions(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 17a1d24bdaed..acb7f3a9b31a 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -76,6 +76,15 @@ MODULE_ALIAS("mmc:block"); #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) +/* + * The compat_mmc_ioc_{multi_}cmd structs have different sizes in PCuABI and in + * compat64, which affects the expected MMC_IOC_{MULTI_}CMD ioctl values. The + * following ioctl values reflect the sizes of the compat64 structs defined in + * this file. + */ +#define COMPAT64_MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct compat_mmc_ioc_cmd) +#define COMPAT64_MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct compat_mmc_ioc_multi_cmd) + static DEFINE_MUTEX(block_mutex); /* @@ -858,6 +867,9 @@ static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode, int ret; switch (cmd) { + case COMPAT64_MMC_IOC_CMD: + if (!in_compat64_syscall()) + return -EINVAL; case MMC_IOC_CMD: ret = mmc_blk_check_blkdev(bdev); if (ret) @@ -870,6 +882,9 @@ static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode, NULL); mmc_blk_put(md); return ret; + case COMPAT64_MMC_IOC_MULTI_CMD: + if (!in_compat64_syscall()) + return -EINVAL; case MMC_IOC_MULTI_CMD: ret = mmc_blk_check_blkdev(bdev); if (ret) @@ -2678,11 +2693,17 @@ static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd, int ret; switch (cmd) { + case COMPAT64_MMC_IOC_CMD: + if (!in_compat64_syscall()) + return -EINVAL; case MMC_IOC_CMD: ret = mmc_blk_ioctl_cmd(rpmb->md, (struct mmc_ioc_cmd __user *)arg, rpmb); break; + case COMPAT64_MMC_IOC_MULTI_CMD: + if (!in_compat64_syscall()) + return -EINVAL; case MMC_IOC_MULTI_CMD: ret = mmc_blk_ioctl_multi_cmd(rpmb->md, (struct mmc_ioc_multi_cmd __user *)arg, diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h index 9d34bfc49198..e99d932268c6 100644 --- a/include/uapi/linux/mmc/ioctl.h +++ b/include/uapi/linux/mmc/ioctl.h @@ -67,26 +67,23 @@ struct mmc_ioc_multi_cmd { /* * The size of struct mmc_ioc_cmd changes in PCuABI due to the use of * __kernel_uintptr_t, which in turn modifies the command value for this - * ioctl. It is therefore necessary to hard-code the value for the ioctl - * using the size of the struct that is expected in any ABI other than - * PCuABI, to ensure that the value for MMC_IOC_CMD is unchanged. The - * original definition is as follows: - * - * #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd) + * ioctl. As this command value is not hard-coded to represent the original + * size of the struct, any ioctl handlers in compat64 must handle this change + * in values instead. */ -#define MMC_IOC_CMD _IOC(_IOC_READ|_IOC_WRITE, MMC_BLOCK_MAJOR, 0, 72) +#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd) + /* * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by * the structure mmc_ioc_multi_cmd. The MMC driver will issue all * commands in array in sequence to card. * * Note: the size of struct mmc_ioc_multi_cmd changes in PCuABI, due to the - * increased alignment of struct mmc_ioc_cmd. For that reason, its value needs - * to be hard-coded too. Original definition: - * - * #define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd) + * increased alignment of struct mmc_ioc_cmd. Similarly to MMC_IOC_CMD, any + * ioctl handlers must account for this change when running in compat64. */ -#define MMC_IOC_MULTI_CMD _IOC(_IOC_READ|_IOC_WRITE, MMC_BLOCK_MAJOR, 1, 8) +#define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd) + /* * Since this ioctl is only meant to enhance (and not replace) normal access * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES -- 2.34.1

10 months, 3 weeks

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2025

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linux-morello April 2024