d34a5709be
Merge the secureboot support, as well as the IMA changes needed to
support it.
From Nayna's cover letter:
In order to verify the OS kernel on PowerNV systems, secure boot
requires X.509 certificates trusted by the platform. These are
stored in secure variables controlled by OPAL, called OPAL secure
variables. In order to enable users to manage the keys, the secure
variables need to be exposed to userspace.
OPAL provides the runtime services for the kernel to be able to
access the secure variables. This patchset defines the kernel
interface for the OPAL APIs. These APIs are used by the hooks, which
load these variables to the keyring and expose them to the userspace
for reading/writing.
Overall, this patchset adds the following support:
* expose secure variables to the kernel via OPAL Runtime API interface
* expose secure variables to the userspace via kernel sysfs interface
* load kernel verification and revocation keys to .platform and
.blacklist keyring respectively.
The secure variables can be read/written using simple linux
utilities cat/hexdump.
For example:
Path to the secure variables is: /sys/firmware/secvar/vars
Each secure variable is listed as directory.
$ ls -l
total 0
drwxr-xr-x. 2 root root 0 Aug 20 21:20 db
drwxr-xr-x. 2 root root 0 Aug 20 21:20 KEK
drwxr-xr-x. 2 root root 0 Aug 20 21:20 PK
The attributes of each of the secure variables are (for example: PK):
$ ls -l
total 0
-r--r--r--. 1 root root 4096 Oct 1 15:10 data
-r--r--r--. 1 root root 65536 Oct 1 15:10 size
--w-------. 1 root root 4096 Oct 1 15:12 update
The "data" is used to read the existing variable value using
hexdump. The data is stored in ESL format. The "update" is used to
write a new value using cat. The update is to be submitted as AUTH
file.
203 lines
6.6 KiB
Makefile
203 lines
6.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux kernel.
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#
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CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
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# Disable clang warning for using setjmp without setjmp.h header
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CFLAGS_crash.o += $(call cc-disable-warning, builtin-requires-header)
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ifdef CONFIG_PPC64
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CFLAGS_prom_init.o += $(NO_MINIMAL_TOC)
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endif
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ifdef CONFIG_PPC32
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CFLAGS_prom_init.o += -fPIC
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CFLAGS_btext.o += -fPIC
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endif
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CFLAGS_cputable.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_prom_init.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_btext.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_prom.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_prom_init.o += $(call cc-option, -fno-stack-protector)
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CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
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ifdef CONFIG_FUNCTION_TRACER
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# Do not trace early boot code
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CFLAGS_REMOVE_cputable.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_prom_init.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
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endif
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KASAN_SANITIZE_early_32.o := n
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KASAN_SANITIZE_cputable.o := n
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KASAN_SANITIZE_prom_init.o := n
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KASAN_SANITIZE_btext.o := n
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ifdef CONFIG_KASAN
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CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
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endif
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obj-y := cputable.o ptrace.o syscalls.o \
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irq.o align.o signal_32.o pmc.o vdso.o \
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process.o systbl.o idle.o \
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signal.o sysfs.o cacheinfo.o time.o \
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prom.o traps.o setup-common.o \
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udbg.o misc.o io.o misc_$(BITS).o \
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of_platform.o prom_parse.o
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obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
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signal_64.o ptrace32.o \
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paca.o nvram_64.o firmware.o note.o
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obj-$(CONFIG_VDSO32) += vdso32/
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obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o
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obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
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obj-$(CONFIG_PPC_DAWR) += dawr.o
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obj-$(CONFIG_PPC_BOOK3S_64) += cpu_setup_ppc970.o cpu_setup_pa6t.o
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obj-$(CONFIG_PPC_BOOK3S_64) += cpu_setup_power.o
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obj-$(CONFIG_PPC_BOOK3S_64) += mce.o mce_power.o
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obj-$(CONFIG_PPC_BOOK3E_64) += exceptions-64e.o idle_book3e.o
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obj-$(CONFIG_PPC_BARRIER_NOSPEC) += security.o
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obj-$(CONFIG_PPC64) += vdso64/
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obj-$(CONFIG_ALTIVEC) += vecemu.o
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obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
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obj-$(CONFIG_PPC_P7_NAP) += idle_book3s.o
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procfs-y := proc_powerpc.o
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obj-$(CONFIG_PROC_FS) += $(procfs-y)
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rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
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obj-$(CONFIG_PPC_RTAS) += rtas.o rtas-rtc.o $(rtaspci-y-y)
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obj-$(CONFIG_PPC_RTAS_DAEMON) += rtasd.o
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obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
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obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
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obj-$(CONFIG_PPC_DT_CPU_FTRS) += dt_cpu_ftrs.o
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obj-$(CONFIG_EEH) += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
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eeh_driver.o eeh_event.o eeh_sysfs.o
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obj-$(CONFIG_GENERIC_TBSYNC) += smp-tbsync.o
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obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
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obj-$(CONFIG_FA_DUMP) += fadump.o
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obj-$(CONFIG_PRESERVE_FA_DUMP) += fadump.o
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ifdef CONFIG_PPC32
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obj-$(CONFIG_E500) += idle_e500.o
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endif
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obj-$(CONFIG_PPC_BOOK3S_32) += idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o
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obj-$(CONFIG_TAU) += tau_6xx.o
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obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o
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ifdef CONFIG_FSL_BOOKE
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obj-$(CONFIG_HIBERNATION) += swsusp_booke.o
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else
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obj-$(CONFIG_HIBERNATION) += swsusp_$(BITS).o
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endif
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obj64-$(CONFIG_HIBERNATION) += swsusp_asm64.o
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obj-$(CONFIG_MODULES) += module.o module_$(BITS).o
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obj-$(CONFIG_44x) += cpu_setup_44x.o
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obj-$(CONFIG_PPC_FSL_BOOK3E) += cpu_setup_fsl_booke.o
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obj-$(CONFIG_PPC_DOORBELL) += dbell.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o
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extra-y := head_$(BITS).o
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extra-$(CONFIG_40x) := head_40x.o
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extra-$(CONFIG_44x) := head_44x.o
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extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o
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extra-$(CONFIG_PPC_8xx) := head_8xx.o
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extra-y += vmlinux.lds
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obj-$(CONFIG_RELOCATABLE) += reloc_$(BITS).o
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obj-$(CONFIG_PPC32) += entry_32.o setup_32.o early_32.o
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obj-$(CONFIG_PPC64) += dma-iommu.o iommu.o
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obj-$(CONFIG_KGDB) += kgdb.o
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obj-$(CONFIG_BOOTX_TEXT) += btext.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_KPROBES) += kprobes.o
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obj-$(CONFIG_OPTPROBES) += optprobes.o optprobes_head.o
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obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o
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obj-$(CONFIG_UPROBES) += uprobes.o
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obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o
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obj-$(CONFIG_ARCH_HAS_DMA_SET_MASK) += dma-mask.o
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pci64-$(CONFIG_PPC64) += pci_dn.o pci-hotplug.o isa-bridge.o
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obj-$(CONFIG_PCI) += pci_$(BITS).o $(pci64-y) \
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pci-common.o pci_of_scan.o
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obj-$(CONFIG_PCI_MSI) += msi.o
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obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o crash.o \
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machine_kexec_$(BITS).o
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obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file_$(BITS).o kexec_elf_$(BITS).o
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ifdef CONFIG_HAVE_IMA_KEXEC
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ifdef CONFIG_IMA
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obj-y += ima_kexec.o
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endif
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endif
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obj-$(CONFIG_AUDIT) += audit.o
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obj64-$(CONFIG_AUDIT) += compat_audit.o
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obj-$(CONFIG_PPC_IO_WORKAROUNDS) += io-workarounds.o
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obj-y += trace/
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ifneq ($(CONFIG_PPC_INDIRECT_PIO),y)
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obj-y += iomap.o
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endif
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obj64-$(CONFIG_PPC_TRANSACTIONAL_MEM) += tm.o
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obj-$(CONFIG_PPC64) += $(obj64-y)
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obj-$(CONFIG_PPC32) += $(obj32-y)
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ifneq ($(CONFIG_XMON)$(CONFIG_KEXEC_CORE)(CONFIG_PPC_BOOK3S),)
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obj-y += ppc_save_regs.o
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endif
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obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
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obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
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ifneq ($(CONFIG_PPC_POWERNV)$(CONFIG_PPC_SVM),)
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obj-y += ucall.o
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endif
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obj-$(CONFIG_PPC_SECURE_BOOT) += secure_boot.o ima_arch.o secvar-ops.o
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obj-$(CONFIG_PPC_SECVAR_SYSFS) += secvar-sysfs.o
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# Disable GCOV, KCOV & sanitizers in odd or sensitive code
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GCOV_PROFILE_prom_init.o := n
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KCOV_INSTRUMENT_prom_init.o := n
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UBSAN_SANITIZE_prom_init.o := n
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GCOV_PROFILE_machine_kexec_64.o := n
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KCOV_INSTRUMENT_machine_kexec_64.o := n
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UBSAN_SANITIZE_machine_kexec_64.o := n
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GCOV_PROFILE_machine_kexec_32.o := n
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KCOV_INSTRUMENT_machine_kexec_32.o := n
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UBSAN_SANITIZE_machine_kexec_32.o := n
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GCOV_PROFILE_kprobes.o := n
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KCOV_INSTRUMENT_kprobes.o := n
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UBSAN_SANITIZE_kprobes.o := n
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GCOV_PROFILE_kprobes-ftrace.o := n
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KCOV_INSTRUMENT_kprobes-ftrace.o := n
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UBSAN_SANITIZE_kprobes-ftrace.o := n
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UBSAN_SANITIZE_vdso.o := n
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# Necessary for booting with kcov enabled on book3e machines
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KCOV_INSTRUMENT_cputable.o := n
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KCOV_INSTRUMENT_setup_64.o := n
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KCOV_INSTRUMENT_paca.o := n
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extra-$(CONFIG_PPC_FPU) += fpu.o
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extra-$(CONFIG_ALTIVEC) += vector.o
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extra-$(CONFIG_PPC64) += entry_64.o
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extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o
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extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init_check
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quiet_cmd_prom_init_check = PROMCHK $@
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cmd_prom_init_check = $(CONFIG_SHELL) $< "$(NM)" $(obj)/prom_init.o; touch $@
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$(obj)/prom_init_check: $(src)/prom_init_check.sh $(obj)/prom_init.o FORCE
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$(call if_changed,prom_init_check)
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targets += prom_init_check
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clean-files := vmlinux.lds
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