* [powerpc:merge] BUILD SUCCESS 463d77b1993642f56ce6929be97c08ef065f48ba
From: kernel test robot @ 2021-02-13 13:33 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git merge
branch HEAD: 463d77b1993642f56ce6929be97c08ef065f48ba Automatic merge of 'next' into merge (2021-02-12 00:44)
elapsed time: 2807m
configs tested: 205
configs skipped: 3
The following configs have been built successfully.
More configs may be tested in the coming days.
gcc tested configs:
arm defconfig
arm64 allyesconfig
arm64 defconfig
arm allyesconfig
arm allmodconfig
alpha alldefconfig
arc haps_hs_smp_defconfig
sh j2_defconfig
powerpc ppc64e_defconfig
arm netwinder_defconfig
arm davinci_all_defconfig
sh sh7763rdp_defconfig
c6x evmc6474_defconfig
arm shannon_defconfig
arc vdk_hs38_defconfig
sh rts7751r2d1_defconfig
m68k q40_defconfig
arm lart_defconfig
arm pleb_defconfig
arm milbeaut_m10v_defconfig
h8300 alldefconfig
powerpc ps3_defconfig
h8300 edosk2674_defconfig
arm moxart_defconfig
arm rpc_defconfig
mips mpc30x_defconfig
arm colibri_pxa300_defconfig
powerpc ge_imp3a_defconfig
m68k atari_defconfig
mips bmips_stb_defconfig
powerpc stx_gp3_defconfig
arm sunxi_defconfig
openrisc alldefconfig
sh se7712_defconfig
h8300 defconfig
sh hp6xx_defconfig
arm simpad_defconfig
powerpc mpc8315_rdb_defconfig
mips cu1830-neo_defconfig
mips tb0219_defconfig
sh rsk7264_defconfig
arm u300_defconfig
arm pxa3xx_defconfig
sh se7206_defconfig
sh ap325rxa_defconfig
xtensa cadence_csp_defconfig
powerpc eiger_defconfig
mips rt305x_defconfig
xtensa xip_kc705_defconfig
powerpc tqm5200_defconfig
sh sh7710voipgw_defconfig
mips maltaaprp_defconfig
powerpc linkstation_defconfig
mips jazz_defconfig
powerpc mpc832x_mds_defconfig
mips capcella_defconfig
powerpc chrp32_defconfig
um x86_64_defconfig
powerpc obs600_defconfig
arm64 alldefconfig
arm axm55xx_defconfig
x86_64 alldefconfig
mips jmr3927_defconfig
mips bmips_be_defconfig
powerpc mpc834x_mds_defconfig
powerpc bluestone_defconfig
sh rsk7203_defconfig
nds32 defconfig
powerpc gamecube_defconfig
mips ath79_defconfig
powerpc64 alldefconfig
s390 debug_defconfig
powerpc xes_mpc85xx_defconfig
powerpc holly_defconfig
powerpc kmeter1_defconfig
powerpc mpc5200_defconfig
openrisc or1klitex_defconfig
arm cns3420vb_defconfig
arm h5000_defconfig
arm clps711x_defconfig
arc nsim_700_defconfig
powerpc pmac32_defconfig
openrisc simple_smp_defconfig
powerpc icon_defconfig
sh defconfig
mips malta_kvm_defconfig
powerpc taishan_defconfig
arm pxa910_defconfig
arm lpc32xx_defconfig
arm badge4_defconfig
powerpc sam440ep_defconfig
powerpc mpc885_ads_defconfig
c6x evmc6457_defconfig
openrisc defconfig
arm omap1_defconfig
xtensa virt_defconfig
mips bigsur_defconfig
arm magician_defconfig
arm vf610m4_defconfig
sparc sparc32_defconfig
mips e55_defconfig
parisc defconfig
parisc generic-32bit_defconfig
powerpc pcm030_defconfig
mips maltaup_xpa_defconfig
arm palmz72_defconfig
powerpc tqm8548_defconfig
microblaze defconfig
powerpc ep88xc_defconfig
sh kfr2r09_defconfig
mips ip32_defconfig
ia64 allmodconfig
ia64 defconfig
ia64 allyesconfig
m68k allmodconfig
m68k defconfig
m68k allyesconfig
nios2 defconfig
arc allyesconfig
nds32 allnoconfig
c6x allyesconfig
nios2 allyesconfig
csky defconfig
alpha defconfig
alpha allyesconfig
xtensa allyesconfig
h8300 allyesconfig
arc defconfig
sh allmodconfig
s390 allyesconfig
s390 allmodconfig
parisc allyesconfig
s390 defconfig
i386 allyesconfig
sparc allyesconfig
sparc defconfig
i386 tinyconfig
i386 defconfig
mips allyesconfig
mips allmodconfig
powerpc allyesconfig
powerpc allmodconfig
powerpc allnoconfig
x86_64 randconfig-a006-20210209
x86_64 randconfig-a001-20210209
x86_64 randconfig-a005-20210209
x86_64 randconfig-a004-20210209
x86_64 randconfig-a002-20210209
x86_64 randconfig-a003-20210209
x86_64 randconfig-a003-20210212
x86_64 randconfig-a002-20210212
x86_64 randconfig-a004-20210212
x86_64 randconfig-a001-20210212
x86_64 randconfig-a005-20210212
x86_64 randconfig-a006-20210212
i386 randconfig-a001-20210209
i386 randconfig-a005-20210209
i386 randconfig-a003-20210209
i386 randconfig-a002-20210209
i386 randconfig-a006-20210209
i386 randconfig-a004-20210209
i386 randconfig-a003-20210212
i386 randconfig-a005-20210212
i386 randconfig-a002-20210212
i386 randconfig-a001-20210212
i386 randconfig-a004-20210212
i386 randconfig-a006-20210212
x86_64 randconfig-a016-20210211
x86_64 randconfig-a013-20210211
x86_64 randconfig-a012-20210211
x86_64 randconfig-a015-20210211
x86_64 randconfig-a014-20210211
x86_64 randconfig-a011-20210211
i386 randconfig-a016-20210209
i386 randconfig-a013-20210209
i386 randconfig-a012-20210209
i386 randconfig-a014-20210209
i386 randconfig-a011-20210209
i386 randconfig-a015-20210209
riscv nommu_k210_defconfig
riscv allyesconfig
riscv nommu_virt_defconfig
riscv allnoconfig
riscv defconfig
riscv rv32_defconfig
riscv allmodconfig
x86_64 rhel
x86_64 allyesconfig
x86_64 rhel-7.6-kselftests
x86_64 defconfig
x86_64 rhel-8.3
x86_64 rhel-8.3-kbuiltin
x86_64 kexec
clang tested configs:
x86_64 randconfig-a003-20210211
x86_64 randconfig-a002-20210211
x86_64 randconfig-a001-20210211
x86_64 randconfig-a004-20210211
x86_64 randconfig-a005-20210211
x86_64 randconfig-a006-20210211
x86_64 randconfig-a013-20210209
x86_64 randconfig-a014-20210209
x86_64 randconfig-a015-20210209
x86_64 randconfig-a012-20210209
x86_64 randconfig-a016-20210209
x86_64 randconfig-a011-20210209
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
^ permalink raw reply
* [powerpc:next] BUILD SUCCESS 82d2c16b350f72aa21ac2a6860c542aa4b43a51e
From: kernel test robot @ 2021-02-13 13:54 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
branch HEAD: 82d2c16b350f72aa21ac2a6860c542aa4b43a51e powerpc/perf: Adds support for programming of Thresholding in P10
elapsed time: 2826m
configs tested: 218
configs skipped: 2
The following configs have been built successfully.
More configs may be tested in the coming days.
gcc tested configs:
arm defconfig
arm64 allyesconfig
arm64 defconfig
arm allyesconfig
arm allmodconfig
arm spear6xx_defconfig
openrisc simple_smp_defconfig
alpha alldefconfig
arc haps_hs_smp_defconfig
sh j2_defconfig
powerpc ppc64e_defconfig
arm netwinder_defconfig
arm shannon_defconfig
arm davinci_all_defconfig
arc vdk_hs38_defconfig
sh sh7763rdp_defconfig
c6x evmc6474_defconfig
nios2 3c120_defconfig
arm u8500_defconfig
mips nlm_xlp_defconfig
sh rts7751r2d1_defconfig
m68k q40_defconfig
arm lart_defconfig
arm pleb_defconfig
arm milbeaut_m10v_defconfig
h8300 alldefconfig
powerpc ps3_defconfig
h8300 edosk2674_defconfig
arm moxart_defconfig
arm rpc_defconfig
mips mpc30x_defconfig
arm colibri_pxa300_defconfig
powerpc ge_imp3a_defconfig
m68k atari_defconfig
mips bmips_stb_defconfig
powerpc stx_gp3_defconfig
arm sunxi_defconfig
sh se7705_defconfig
m68k hp300_defconfig
powerpc linkstation_defconfig
sh migor_defconfig
mips maltasmvp_defconfig
m68k defconfig
openrisc alldefconfig
sh se7712_defconfig
h8300 defconfig
sh hp6xx_defconfig
arm simpad_defconfig
powerpc mpc8315_rdb_defconfig
mips cu1830-neo_defconfig
mips tb0219_defconfig
sh rsk7264_defconfig
arm u300_defconfig
arm pxa3xx_defconfig
sh se7206_defconfig
sh ap325rxa_defconfig
powerpc eiger_defconfig
xtensa cadence_csp_defconfig
mips rt305x_defconfig
xtensa xip_kc705_defconfig
powerpc tqm5200_defconfig
sh sh7710voipgw_defconfig
mips maltaaprp_defconfig
mips jazz_defconfig
powerpc mpc832x_mds_defconfig
mips capcella_defconfig
s390 debug_defconfig
powerpc redwood_defconfig
arm exynos_defconfig
powerpc fsp2_defconfig
mips ci20_defconfig
nds32 alldefconfig
arm aspeed_g4_defconfig
mips workpad_defconfig
powerpc bluestone_defconfig
sh rsk7203_defconfig
nds32 defconfig
powerpc gamecube_defconfig
mips ath79_defconfig
powerpc64 alldefconfig
powerpc xes_mpc85xx_defconfig
powerpc holly_defconfig
powerpc kmeter1_defconfig
mips tb0287_defconfig
powerpc socrates_defconfig
mips ar7_defconfig
powerpc sbc8548_defconfig
powerpc tqm8555_defconfig
powerpc allmodconfig
powerpc amigaone_defconfig
mips omega2p_defconfig
arm s5pv210_defconfig
powerpc mpc837x_rdb_defconfig
powerpc mpc5200_defconfig
arm clps711x_defconfig
arc nsim_700_defconfig
powerpc pmac32_defconfig
powerpc icon_defconfig
sh defconfig
mips malta_kvm_defconfig
powerpc taishan_defconfig
arm pxa910_defconfig
arm lpc32xx_defconfig
arm badge4_defconfig
powerpc sam440ep_defconfig
powerpc mpc885_ads_defconfig
c6x evmc6457_defconfig
openrisc defconfig
arm omap1_defconfig
powerpc chrp32_defconfig
arm vf610m4_defconfig
sparc sparc32_defconfig
mips e55_defconfig
parisc defconfig
parisc generic-32bit_defconfig
powerpc pcm030_defconfig
mips maltaup_xpa_defconfig
arm palmz72_defconfig
powerpc tqm8548_defconfig
microblaze defconfig
ia64 allmodconfig
ia64 defconfig
ia64 allyesconfig
m68k allmodconfig
m68k allyesconfig
nios2 defconfig
arc allyesconfig
nds32 allnoconfig
c6x allyesconfig
nios2 allyesconfig
csky defconfig
alpha defconfig
alpha allyesconfig
xtensa allyesconfig
h8300 allyesconfig
arc defconfig
sh allmodconfig
s390 allyesconfig
s390 allmodconfig
parisc allyesconfig
s390 defconfig
i386 allyesconfig
sparc allyesconfig
sparc defconfig
i386 tinyconfig
i386 defconfig
mips allyesconfig
mips allmodconfig
powerpc allyesconfig
powerpc allnoconfig
x86_64 randconfig-a006-20210209
x86_64 randconfig-a001-20210209
x86_64 randconfig-a005-20210209
x86_64 randconfig-a004-20210209
x86_64 randconfig-a002-20210209
x86_64 randconfig-a003-20210209
x86_64 randconfig-a003-20210212
x86_64 randconfig-a002-20210212
x86_64 randconfig-a004-20210212
x86_64 randconfig-a001-20210212
x86_64 randconfig-a005-20210212
x86_64 randconfig-a006-20210212
i386 randconfig-a001-20210209
i386 randconfig-a005-20210209
i386 randconfig-a003-20210209
i386 randconfig-a002-20210209
i386 randconfig-a006-20210209
i386 randconfig-a004-20210209
i386 randconfig-a003-20210212
i386 randconfig-a005-20210212
i386 randconfig-a002-20210212
i386 randconfig-a001-20210212
i386 randconfig-a004-20210212
i386 randconfig-a006-20210212
x86_64 randconfig-a016-20210211
x86_64 randconfig-a013-20210211
x86_64 randconfig-a012-20210211
x86_64 randconfig-a015-20210211
x86_64 randconfig-a014-20210211
x86_64 randconfig-a011-20210211
i386 randconfig-a016-20210209
i386 randconfig-a013-20210209
i386 randconfig-a012-20210209
i386 randconfig-a014-20210209
i386 randconfig-a011-20210209
i386 randconfig-a015-20210209
i386 randconfig-a016-20210211
i386 randconfig-a014-20210211
i386 randconfig-a012-20210211
i386 randconfig-a013-20210211
i386 randconfig-a011-20210211
i386 randconfig-a015-20210211
riscv nommu_k210_defconfig
riscv allyesconfig
riscv nommu_virt_defconfig
riscv allnoconfig
riscv defconfig
riscv rv32_defconfig
riscv allmodconfig
x86_64 rhel
x86_64 allyesconfig
x86_64 rhel-7.6-kselftests
x86_64 defconfig
x86_64 rhel-8.3
x86_64 rhel-8.3-kbuiltin
x86_64 kexec
clang tested configs:
x86_64 randconfig-a003-20210211
x86_64 randconfig-a002-20210211
x86_64 randconfig-a001-20210211
x86_64 randconfig-a004-20210211
x86_64 randconfig-a005-20210211
x86_64 randconfig-a006-20210211
x86_64 randconfig-a013-20210209
x86_64 randconfig-a014-20210209
x86_64 randconfig-a015-20210209
x86_64 randconfig-a012-20210209
x86_64 randconfig-a016-20210209
x86_64 randconfig-a011-20210209
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
^ permalink raw reply
* [powerpc:next-test] BUILD SUCCESS ce7218f40a32592aeba98e957cdf1f61387df16a
From: kernel test robot @ 2021-02-13 13:55 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next-test
branch HEAD: ce7218f40a32592aeba98e957cdf1f61387df16a powerpc/mm/64s: Allow STRICT_KERNEL_RWX again
elapsed time: 2228m
configs tested: 202
configs skipped: 2
The following configs have been built successfully.
More configs may be tested in the coming days.
gcc tested configs:
arm defconfig
arm64 allyesconfig
arm64 defconfig
arm allyesconfig
arm allmodconfig
riscv nommu_k210_defconfig
alpha alldefconfig
arc haps_hs_smp_defconfig
sh j2_defconfig
powerpc ppc64e_defconfig
arm netwinder_defconfig
arm shannon_defconfig
arm davinci_all_defconfig
arc vdk_hs38_defconfig
sh sh7763rdp_defconfig
c6x evmc6474_defconfig
sh rts7751r2d1_defconfig
m68k q40_defconfig
arm lart_defconfig
arm pleb_defconfig
arm milbeaut_m10v_defconfig
h8300 alldefconfig
powerpc ps3_defconfig
h8300 edosk2674_defconfig
arm moxart_defconfig
arm rpc_defconfig
mips mpc30x_defconfig
arm colibri_pxa300_defconfig
powerpc ge_imp3a_defconfig
m68k atari_defconfig
mips bmips_stb_defconfig
powerpc stx_gp3_defconfig
arm sunxi_defconfig
arm axm55xx_defconfig
arm clps711x_defconfig
sh landisk_defconfig
sh edosk7760_defconfig
arm realview_defconfig
arm integrator_defconfig
openrisc alldefconfig
sh se7712_defconfig
h8300 defconfig
sh hp6xx_defconfig
arm simpad_defconfig
powerpc mpc8315_rdb_defconfig
mips cu1830-neo_defconfig
mips tb0219_defconfig
sh rsk7264_defconfig
arm u300_defconfig
openrisc defconfig
arm pxa3xx_defconfig
sh se7206_defconfig
sh ap325rxa_defconfig
powerpc eiger_defconfig
xtensa cadence_csp_defconfig
arm tct_hammer_defconfig
arm aspeed_g5_defconfig
arm vf610m4_defconfig
arm lpd270_defconfig
powerpc linkstation_defconfig
mips jazz_defconfig
powerpc mpc832x_mds_defconfig
mips capcella_defconfig
powerpc redwood_defconfig
arm exynos_defconfig
nds32 alldefconfig
arm aspeed_g4_defconfig
mips workpad_defconfig
sh migor_defconfig
arm corgi_defconfig
um i386_defconfig
powerpc bluestone_defconfig
sh rsk7203_defconfig
nds32 defconfig
powerpc gamecube_defconfig
mips ath79_defconfig
powerpc64 alldefconfig
s390 debug_defconfig
powerpc xes_mpc85xx_defconfig
powerpc holly_defconfig
powerpc kmeter1_defconfig
powerpc amigaone_defconfig
mips omega2p_defconfig
arm s5pv210_defconfig
powerpc mpc837x_rdb_defconfig
powerpc mpc5200_defconfig
arc nsim_700_defconfig
powerpc pmac32_defconfig
openrisc simple_smp_defconfig
powerpc icon_defconfig
powerpc mpc836x_rdk_defconfig
mips ip28_defconfig
sh defconfig
powerpc mpc7448_hpc2_defconfig
arm lpc32xx_defconfig
arm badge4_defconfig
mips maltaaprp_defconfig
powerpc chrp32_defconfig
sparc sparc32_defconfig
mips e55_defconfig
parisc defconfig
parisc generic-32bit_defconfig
powerpc ep88xc_defconfig
sh kfr2r09_defconfig
arm zx_defconfig
mips ip32_defconfig
mips cavium_octeon_defconfig
m68k m5208evb_defconfig
mips decstation_defconfig
mips nlm_xlp_defconfig
mips malta_kvm_guest_defconfig
sh ecovec24-romimage_defconfig
arm spitz_defconfig
ia64 gensparse_defconfig
arm alldefconfig
ia64 allmodconfig
ia64 defconfig
ia64 allyesconfig
m68k allmodconfig
m68k defconfig
m68k allyesconfig
nios2 defconfig
arc allyesconfig
nds32 allnoconfig
c6x allyesconfig
nios2 allyesconfig
csky defconfig
alpha defconfig
alpha allyesconfig
xtensa allyesconfig
h8300 allyesconfig
arc defconfig
sh allmodconfig
s390 allyesconfig
s390 allmodconfig
parisc allyesconfig
s390 defconfig
i386 allyesconfig
sparc allyesconfig
sparc defconfig
i386 tinyconfig
i386 defconfig
mips allyesconfig
mips allmodconfig
powerpc allyesconfig
powerpc allmodconfig
powerpc allnoconfig
x86_64 randconfig-a006-20210209
x86_64 randconfig-a001-20210209
x86_64 randconfig-a005-20210209
x86_64 randconfig-a004-20210209
x86_64 randconfig-a002-20210209
x86_64 randconfig-a003-20210209
x86_64 randconfig-a003-20210212
x86_64 randconfig-a002-20210212
x86_64 randconfig-a004-20210212
x86_64 randconfig-a001-20210212
x86_64 randconfig-a005-20210212
x86_64 randconfig-a006-20210212
i386 randconfig-a001-20210209
i386 randconfig-a005-20210209
i386 randconfig-a003-20210209
i386 randconfig-a002-20210209
i386 randconfig-a006-20210209
i386 randconfig-a004-20210209
i386 randconfig-a003-20210212
i386 randconfig-a005-20210212
i386 randconfig-a002-20210212
i386 randconfig-a001-20210212
i386 randconfig-a004-20210212
i386 randconfig-a006-20210212
i386 randconfig-a016-20210209
i386 randconfig-a013-20210209
i386 randconfig-a012-20210209
i386 randconfig-a014-20210209
i386 randconfig-a011-20210209
i386 randconfig-a015-20210209
i386 randconfig-a016-20210211
i386 randconfig-a014-20210211
i386 randconfig-a012-20210211
i386 randconfig-a013-20210211
i386 randconfig-a011-20210211
i386 randconfig-a015-20210211
riscv allyesconfig
riscv nommu_virt_defconfig
riscv allnoconfig
riscv defconfig
riscv rv32_defconfig
riscv allmodconfig
x86_64 rhel
x86_64 allyesconfig
x86_64 rhel-7.6-kselftests
x86_64 defconfig
x86_64 rhel-8.3
x86_64 rhel-8.3-kbuiltin
x86_64 kexec
clang tested configs:
x86_64 randconfig-a013-20210209
x86_64 randconfig-a014-20210209
x86_64 randconfig-a015-20210209
x86_64 randconfig-a012-20210209
x86_64 randconfig-a016-20210209
x86_64 randconfig-a011-20210209
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
^ permalink raw reply
* [PATCH v18 03/11] of: Add a common kexec FDT setup function
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
From: Rob Herring <robh@kernel.org>
Both arm64 and powerpc do essentially the same FDT /chosen setup for
kexec. The differences are either omissions that arm64 should have
or additional properties that will be ignored. The setup code can be
combined and shared by both powerpc and arm64.
The differences relative to the arm64 version:
- If /chosen doesn't exist, it will be created (should never happen).
- Any old dtb and initrd reserved memory will be released.
- The new initrd and elfcorehdr are marked reserved.
- "linux,booted-from-kexec" is set.
The differences relative to the powerpc version:
- "kaslr-seed" and "rng-seed" may be set.
- "linux,elfcorehdr" is set.
- Any existing "linux,usable-memory-range" is removed.
Combine the code for setting up the /chosen node in the FDT and updating
the memory reservation for kexec, for powerpc and arm64, in
of_kexec_alloc_and_setup_fdt() and move it to "drivers/of/kexec.c".
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
---
drivers/of/Makefile | 6 +
drivers/of/kexec.c | 265 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/of.h | 5 +
3 files changed, 276 insertions(+)
create mode 100644 drivers/of/kexec.c
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 6e1e5212f058..c13b982084a3 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -14,4 +14,10 @@ obj-$(CONFIG_OF_RESOLVE) += resolver.o
obj-$(CONFIG_OF_OVERLAY) += overlay.o
obj-$(CONFIG_OF_NUMA) += of_numa.o
+ifdef CONFIG_KEXEC_FILE
+ifdef CONFIG_OF_FLATTREE
+obj-y += kexec.o
+endif
+endif
+
obj-$(CONFIG_OF_UNITTEST) += unittest-data/
diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
new file mode 100644
index 000000000000..264cac0fd4cd
--- /dev/null
+++ b/drivers/of/kexec.c
@@ -0,0 +1,265 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Arm Limited
+ *
+ * Based on arch/arm64/kernel/machine_kexec_file.c:
+ * Copyright (C) 2018 Linaro Limited
+ *
+ * And arch/powerpc/kexec/file_load.c:
+ * Copyright (C) 2016 IBM Corporation
+ */
+
+#include <linux/kernel.h>
+#include <linux/kexec.h>
+#include <linux/libfdt.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/random.h>
+#include <linux/types.h>
+
+/* relevant device tree properties */
+#define FDT_PROP_KEXEC_ELFHDR "linux,elfcorehdr"
+#define FDT_PROP_MEM_RANGE "linux,usable-memory-range"
+#define FDT_PROP_INITRD_START "linux,initrd-start"
+#define FDT_PROP_INITRD_END "linux,initrd-end"
+#define FDT_PROP_BOOTARGS "bootargs"
+#define FDT_PROP_KASLR_SEED "kaslr-seed"
+#define FDT_PROP_RNG_SEED "rng-seed"
+#define RNG_SEED_SIZE 128
+
+/*
+ * Additional space needed for the FDT buffer so that we can add initrd,
+ * bootargs, kaslr-seed, rng-seed, useable-memory-range and elfcorehdr.
+ */
+#define FDT_EXTRA_SPACE 0x1000
+
+/**
+ * fdt_find_and_del_mem_rsv - delete memory reservation with given address and size
+ *
+ * @fdt: Flattened device tree for the current kernel.
+ * @start: Starting address of the reserved memory.
+ * @size: Size of the reserved memory.
+ *
+ * Return: 0 on success, or negative errno on error.
+ */
+static int fdt_find_and_del_mem_rsv(void *fdt, unsigned long start, unsigned long size)
+{
+ int i, ret, num_rsvs = fdt_num_mem_rsv(fdt);
+
+ for (i = 0; i < num_rsvs; i++) {
+ u64 rsv_start, rsv_size;
+
+ ret = fdt_get_mem_rsv(fdt, i, &rsv_start, &rsv_size);
+ if (ret) {
+ pr_err("Malformed device tree.\n");
+ return -EINVAL;
+ }
+
+ if (rsv_start == start && rsv_size == size) {
+ ret = fdt_del_mem_rsv(fdt, i);
+ if (ret) {
+ pr_err("Error deleting device tree reservation.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+ }
+ }
+
+ return -ENOENT;
+}
+
+/*
+ * of_kexec_alloc_and_setup_fdt - Alloc and setup a new Flattened Device Tree
+ *
+ * @image: kexec image being loaded.
+ * @initrd_load_addr: Address where the next initrd will be loaded.
+ * @initrd_len: Size of the next initrd, or 0 if there will be none.
+ * @cmdline: Command line for the next kernel, or NULL if there will
+ * be none.
+ * @extra_fdt_size: Additional size for the new FDT buffer.
+ *
+ * Return: fdt on success, or NULL errno on error.
+ */
+void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
+ unsigned long initrd_load_addr,
+ unsigned long initrd_len,
+ const char *cmdline, size_t extra_fdt_size)
+{
+ void *fdt;
+ int ret, chosen_node;
+ const void *prop;
+ size_t fdt_size;
+
+ fdt_size = fdt_totalsize(initial_boot_params) +
+ (cmdline ? strlen(cmdline) : 0) +
+ FDT_EXTRA_SPACE +
+ extra_fdt_size;
+ fdt = kvmalloc(fdt_size, GFP_KERNEL);
+ if (!fdt)
+ return NULL;
+
+ ret = fdt_open_into(initial_boot_params, fdt, fdt_size);
+ if (ret < 0) {
+ pr_err("Error %d setting up the new device tree.\n", ret);
+ goto out;
+ }
+
+ /* Remove memory reservation for the current device tree. */
+ ret = fdt_find_and_del_mem_rsv(fdt, __pa(initial_boot_params),
+ fdt_totalsize(initial_boot_params));
+ if (ret == -EINVAL) {
+ pr_err("Error removing memory reservation.\n");
+ goto out;
+ }
+
+ chosen_node = fdt_path_offset(fdt, "/chosen");
+ if (chosen_node == -FDT_ERR_NOTFOUND)
+ chosen_node = fdt_add_subnode(fdt, fdt_path_offset(fdt, "/"),
+ "chosen");
+ if (chosen_node < 0) {
+ ret = chosen_node;
+ goto out;
+ }
+
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_KEXEC_ELFHDR);
+ if (ret && ret != -FDT_ERR_NOTFOUND)
+ goto out;
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_MEM_RANGE);
+ if (ret && ret != -FDT_ERR_NOTFOUND)
+ goto out;
+
+ /* Did we boot using an initrd? */
+ prop = fdt_getprop(fdt, chosen_node, "linux,initrd-start", NULL);
+ if (prop) {
+ u64 tmp_start, tmp_end, tmp_size;
+
+ tmp_start = fdt64_to_cpu(*((const fdt64_t *) prop));
+
+ prop = fdt_getprop(fdt, chosen_node, "linux,initrd-end", NULL);
+ if (!prop) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ tmp_end = fdt64_to_cpu(*((const fdt64_t *) prop));
+
+ /*
+ * kexec reserves exact initrd size, while firmware may
+ * reserve a multiple of PAGE_SIZE, so check for both.
+ */
+ tmp_size = tmp_end - tmp_start;
+ ret = fdt_find_and_del_mem_rsv(fdt, tmp_start, tmp_size);
+ if (ret == -ENOENT)
+ ret = fdt_find_and_del_mem_rsv(fdt, tmp_start,
+ round_up(tmp_size, PAGE_SIZE));
+ if (ret == -EINVAL)
+ goto out;
+ }
+
+ /* add initrd-* */
+ if (initrd_load_addr) {
+ ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_INITRD_START,
+ initrd_load_addr);
+ if (ret)
+ goto out;
+
+ ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_INITRD_END,
+ initrd_load_addr + initrd_len);
+ if (ret)
+ goto out;
+
+ ret = fdt_add_mem_rsv(fdt, initrd_load_addr, initrd_len);
+ if (ret)
+ goto out;
+
+ } else {
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_INITRD_START);
+ if (ret && (ret != -FDT_ERR_NOTFOUND))
+ goto out;
+
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_INITRD_END);
+ if (ret && (ret != -FDT_ERR_NOTFOUND))
+ goto out;
+ }
+
+ if (image->type == KEXEC_TYPE_CRASH) {
+ /* add linux,elfcorehdr */
+ ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
+ FDT_PROP_KEXEC_ELFHDR,
+ image->arch.elf_load_addr,
+ image->arch.elf_headers_sz);
+ if (ret)
+ goto out;
+
+ /*
+ * Avoid elfcorehdr from being stomped on in kdump kernel by
+ * setting up memory reserve map.
+ */
+ ret = fdt_add_mem_rsv(fdt, image->arch.elf_load_addr,
+ image->arch.elf_headers_sz);
+ if (ret)
+ goto out;
+
+ /* add linux,usable-memory-range */
+ ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
+ FDT_PROP_MEM_RANGE,
+ crashk_res.start,
+ crashk_res.end - crashk_res.start + 1);
+ if (ret)
+ goto out;
+ }
+
+ /* add bootargs */
+ if (cmdline) {
+ ret = fdt_setprop_string(fdt, chosen_node, FDT_PROP_BOOTARGS, cmdline);
+ if (ret)
+ goto out;
+ } else {
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_BOOTARGS);
+ if (ret && (ret != -FDT_ERR_NOTFOUND))
+ goto out;
+ }
+
+ /* add kaslr-seed */
+ ret = fdt_delprop(fdt, chosen_node, FDT_PROP_KASLR_SEED);
+ if (ret == -FDT_ERR_NOTFOUND)
+ ret = 0;
+ else if (ret)
+ goto out;
+
+ if (rng_is_initialized()) {
+ u64 seed = get_random_u64();
+
+ ret = fdt_setprop_u64(fdt, chosen_node, FDT_PROP_KASLR_SEED, seed);
+ if (ret)
+ goto out;
+ } else {
+ pr_notice("RNG is not initialised: omitting \"%s\" property\n",
+ FDT_PROP_KASLR_SEED);
+ }
+
+ /* add rng-seed */
+ if (rng_is_initialized()) {
+ void *rng_seed;
+
+ ret = fdt_setprop_placeholder(fdt, chosen_node, FDT_PROP_RNG_SEED,
+ RNG_SEED_SIZE, &rng_seed);
+ if (ret)
+ goto out;
+ get_random_bytes(rng_seed, RNG_SEED_SIZE);
+ } else {
+ pr_notice("RNG is not initialised: omitting \"%s\" property\n",
+ FDT_PROP_RNG_SEED);
+ }
+
+ ret = fdt_setprop(fdt, chosen_node, "linux,booted-from-kexec", NULL, 0);
+
+out:
+ if (ret) {
+ kvfree(fdt);
+ fdt = NULL;
+ }
+
+ return fdt;
+}
diff --git a/include/linux/of.h b/include/linux/of.h
index 4b27c9a27df3..d66c915df910 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -560,6 +560,11 @@ int of_map_id(struct device_node *np, u32 id,
phys_addr_t of_dma_get_max_cpu_address(struct device_node *np);
+struct kimage;
+void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
+ unsigned long initrd_load_addr,
+ unsigned long initrd_len,
+ const char *cmdline, size_t extra_fdt_size);
#else /* CONFIG_OF */
static inline void of_core_init(void)
--
2.30.0
^ permalink raw reply related
* [PATCH v18 00/10] Carry forward IMA measurement log on kexec on ARM64
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
On kexec file load Integrity Measurement Architecture (IMA) subsystem
may verify the IMA signature of the kernel and initramfs, and measure
it. The command line parameters passed to the kernel in the kexec call
may also be measured by IMA. A remote attestation service can verify
a TPM quote based on the TPM event log, the IMA measurement list, and
the TPM PCR data. This can be achieved only if the IMA measurement log
is carried over from the current kernel to the next kernel across
the kexec call.
powerpc already supports carrying forward the IMA measurement log on
kexec. This patch set adds support for carrying forward the IMA
measurement log on kexec on ARM64.
This patch set moves the platform independent code defined for powerpc
such that it can be reused for other platforms as well. A chosen node
"linux,ima-kexec-buffer" is added to the DTB for ARM64 to hold
the address and the size of the memory reserved to carry
the IMA measurement log.
This patch set has been tested for ARM64 platform using QEMU.
I would like help from the community for testing this change on powerpc.
Thanks.
This patch set is based on
commit f31e3386a4e9 ("ima: Free IMA measurement buffer after kexec syscall")
in https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git
"ima-kexec-fixes" branch.
Changelog:
v18
- Added a parameter to of_kexec_alloc_and_setup_fdt() for the caller
to specify additional space needed for the FDT buffer
- Renamed arm64 and powerpc ELF buffer address field in
"struct kimage_arch" to elf_load_addr to match x86_64 name.
- Removed of_ima_add_kexec_buffer() and instead directly set
ima_buffer_addr and ima_buffer_size in ima_add_kexec_buffer()
- Moved FDT_EXTRA_SPACE definition from include/linux/of.h to
drivers/of/kexec.c
v17
- Renamed of_kexec_setup_new_fdt() to of_kexec_alloc_and_setup_fdt(),
and moved memory allocation for the new FDT to this function.
v16
- Defined functions to allocate and free buffer for FDT for powerpc
and arm64.
- Moved ima_buffer_addr and ima_buffer_size fields from
"struct kimage_arch" in powerpc to "struct kimage"
v15
- Included Rob's patches in the patch set, and rebased
the changes to "next-integrity" branch.
- Allocate memory for DTB, on arm64, using kmalloc() instead of
vmalloc() to keep it consistent with powerpc implementation.
- Call of_kexec_setup_new_fdt() from setup_new_fdt_ppc64() and
remove setup_new_fdt() in the same patch to keep it bisect safe.
v14
- Select CONFIG_HAVE_IMA_KEXEC for CONFIG_KEXEC_FILE, for powerpc
and arm64, if CONFIG_IMA is enabled.
- Use IS_ENABLED() macro instead of "#ifdef" in remove_ima_buffer(),
ima_get_kexec_buffer(), and ima_free_kexec_buffer().
- Call of_kexec_setup_new_fdt() from setup_new_fdt_ppc64() and
remove setup_new_fdt() in "arch/powerpc/kexec/file_load.c".
v13
- Moved the arch independent functions to drivers/of/kexec.c
and then refactored the code.
- Moved arch_ima_add_kexec_buffer() to
security/integrity/ima/ima_kexec.c
v12
- Use fdt_appendprop_addrrange() in setup_ima_buffer()
to setup the IMA measurement list property in
the device tree.
- Moved architecture independent functions from
"arch/powerpc/kexec/ima.c" to "drivers/of/kexec."
- Deleted "arch/powerpc/kexec/ima.c" and
"arch/powerpc/include/asm/ima.h".
v11
- Rebased the changes on the kexec code refactoring done by
Rob Herring in his "dt/kexec" branch
- Removed "extern" keyword in function declarations
- Removed unnecessary header files included in C files
- Updated patch descriptions per Thiago's comments
v10
- Moved delete_fdt_mem_rsv(), remove_ima_buffer(),
get_ima_kexec_buffer, and get_root_addr_size_cells()
to drivers/of/kexec.c
- Moved arch_ima_add_kexec_buffer() to
security/integrity/ima/ima_kexec.c
- Conditionally define IMA buffer fields in struct kimage_arch
v9
- Moved delete_fdt_mem_rsv() to drivers/of/kexec_fdt.c
- Defined a new function get_ima_kexec_buffer() in
drivers/of/ima_kexec.c to replace do_get_kexec_buffer()
- Changed remove_ima_kexec_buffer() to the original function name
remove_ima_buffer()
- Moved remove_ima_buffer() to drivers/of/ima_kexec.c
- Moved ima_get_kexec_buffer() and ima_free_kexec_buffer()
to security/integrity/ima/ima_kexec.c
v8:
- Moved remove_ima_kexec_buffer(), do_get_kexec_buffer(), and
delete_fdt_mem_rsv() to drivers/of/fdt.c
- Moved ima_dump_measurement_list() and ima_add_kexec_buffer()
back to security/integrity/ima/ima_kexec.c
v7:
- Renamed remove_ima_buffer() to remove_ima_kexec_buffer() and moved
this function definition to kernel.
- Moved delete_fdt_mem_rsv() definition to kernel
- Moved ima_dump_measurement_list() and ima_add_kexec_buffer() to
a new file namely ima_kexec_fdt.c in IMA
v6:
- Remove any existing FDT_PROP_IMA_KEXEC_BUFFER property in the device
tree and also its corresponding memory reservation in the currently
running kernel.
- Moved the function remove_ima_buffer() defined for powerpc to IMA
and renamed the function to ima_remove_kexec_buffer(). Also, moved
delete_fdt_mem_rsv() from powerpc to IMA.
v5:
- Merged get_addr_size_cells() and do_get_kexec_buffer() into a single
function when moving the arch independent code from powerpc to IMA
- Reverted the change to use FDT functions in powerpc code and added
back the original code in get_addr_size_cells() and
do_get_kexec_buffer() for powerpc.
- Added fdt_add_mem_rsv() for ARM64 to reserve the memory for
the IMA log buffer during kexec.
- Fixed the warning reported by kernel test bot for ARM64
arch_ima_add_kexec_buffer() - moved this function to a new file
namely arch/arm64/kernel/ima_kexec.c
v4:
- Submitting the patch series on behalf of the original author
Prakhar Srivastava <prsriva@linux.microsoft.com>
- Moved FDT_PROP_IMA_KEXEC_BUFFER ("linux,ima-kexec-buffer") to
libfdt.h so that it can be shared by multiple platforms.
v3:
Breakup patches further into separate patches.
- Refactoring non architecture specific code out of powerpc
- Update powerpc related code to use fdt functions
- Update IMA buffer read related code to use of functions
- Add support to store the memory information of the IMA
measurement logs to be carried forward.
- Update the property strings to align with documented nodes
https://github.com/devicetree-org/dt-schema/pull/46
v2:
Break patches into separate patches.
- Powerpc related Refactoring
- Updating the docuemntation for chosen node
- Updating arm64 to support IMA buffer pass
v1:
Refactoring carrying over IMA measuremnet logs over Kexec. This patch
moves the non-architecture specific code out of powerpc and adds to
security/ima.(Suggested by Thiago)
Add Documentation regarding the ima-kexec-buffer node in the chosen
node documentation
v0:
Add a layer of abstraction to use the memory reserved by device tree
for ima buffer pass.
Add support for ima buffer pass using reserved memory for arm64 kexec.
Update the arch sepcific code path in kexec file load to store the
ima buffer in the reserved memory. The same reserved memory is read
on kexec or cold boot.
Lakshmi Ramasubramanian (7):
arm64: Rename kexec elf_headers_mem to elf_load_addr
powerpc: Move ima buffer fields to struct kimage
powerpc: Enable passing IMA log to next kernel on kexec
powerpc: Move arch independent ima kexec functions to
drivers/of/kexec.c
kexec: Use fdt_appendprop_addrrange() to add ima buffer to FDT
powerpc: Delete unused function delete_fdt_mem_rsv()
arm64: Enable passing IMA log to next kernel on kexec
Rob Herring (4):
powerpc: Rename kexec elfcorehdr_addr to elf_load_addr
of: Add a common kexec FDT setup function
arm64: Use common of_kexec_alloc_and_setup_fdt()
powerpc: Use common of_kexec_alloc_and_setup_fdt()
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/kexec.h | 2 +-
arch/arm64/kernel/machine_kexec_file.c | 184 +---------
arch/powerpc/Kconfig | 2 +-
arch/powerpc/include/asm/ima.h | 30 --
arch/powerpc/include/asm/kexec.h | 12 +-
arch/powerpc/kexec/Makefile | 7 -
arch/powerpc/kexec/elf_64.c | 30 +-
arch/powerpc/kexec/file_load.c | 183 +---------
arch/powerpc/kexec/file_load_64.c | 11 +-
arch/powerpc/kexec/ima.c | 219 ------------
drivers/of/Makefile | 6 +
drivers/of/kexec.c | 458 +++++++++++++++++++++++++
include/linux/kexec.h | 3 +
include/linux/of.h | 7 +
security/integrity/ima/ima.h | 4 -
security/integrity/ima/ima_kexec.c | 9 +-
17 files changed, 516 insertions(+), 652 deletions(-)
delete mode 100644 arch/powerpc/include/asm/ima.h
delete mode 100644 arch/powerpc/kexec/ima.c
create mode 100644 drivers/of/kexec.c
--
2.30.0
^ permalink raw reply
* [PATCH v18 04/11] arm64: Use common of_kexec_alloc_and_setup_fdt()
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
From: Rob Herring <robh@kernel.org>
The code for setting up the /chosen node in the device tree
and updating the memory reservation for the next kernel has been
moved to of_kexec_alloc_and_setup_fdt() defined in "drivers/of/kexec.c".
Use the common of_kexec_alloc_and_setup_fdt() to setup the device tree
and update the memory reservation for kexec for arm64.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
---
arch/arm64/kernel/machine_kexec_file.c | 180 ++-----------------------
1 file changed, 8 insertions(+), 172 deletions(-)
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index d98bacec9426..c9f112455a4d 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -15,23 +15,12 @@
#include <linux/kexec.h>
#include <linux/libfdt.h>
#include <linux/memblock.h>
+#include <linux/of.h>
#include <linux/of_fdt.h>
-#include <linux/random.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
-#include <asm/byteorder.h>
-
-/* relevant device tree properties */
-#define FDT_PROP_KEXEC_ELFHDR "linux,elfcorehdr"
-#define FDT_PROP_MEM_RANGE "linux,usable-memory-range"
-#define FDT_PROP_INITRD_START "linux,initrd-start"
-#define FDT_PROP_INITRD_END "linux,initrd-end"
-#define FDT_PROP_BOOTARGS "bootargs"
-#define FDT_PROP_KASLR_SEED "kaslr-seed"
-#define FDT_PROP_RNG_SEED "rng-seed"
-#define RNG_SEED_SIZE 128
const struct kexec_file_ops * const kexec_file_loaders[] = {
&kexec_image_ops,
@@ -40,7 +29,7 @@ const struct kexec_file_ops * const kexec_file_loaders[] = {
int arch_kimage_file_post_load_cleanup(struct kimage *image)
{
- vfree(image->arch.dtb);
+ kvfree(image->arch.dtb);
image->arch.dtb = NULL;
vfree(image->arch.elf_headers);
@@ -50,162 +39,6 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image)
return kexec_image_post_load_cleanup_default(image);
}
-static int setup_dtb(struct kimage *image,
- unsigned long initrd_load_addr, unsigned long initrd_len,
- char *cmdline, void *dtb)
-{
- int off, ret;
-
- ret = fdt_path_offset(dtb, "/chosen");
- if (ret < 0)
- goto out;
-
- off = ret;
-
- ret = fdt_delprop(dtb, off, FDT_PROP_KEXEC_ELFHDR);
- if (ret && ret != -FDT_ERR_NOTFOUND)
- goto out;
- ret = fdt_delprop(dtb, off, FDT_PROP_MEM_RANGE);
- if (ret && ret != -FDT_ERR_NOTFOUND)
- goto out;
-
- if (image->type == KEXEC_TYPE_CRASH) {
- /* add linux,elfcorehdr */
- ret = fdt_appendprop_addrrange(dtb, 0, off,
- FDT_PROP_KEXEC_ELFHDR,
- image->arch.elf_load_addr,
- image->arch.elf_headers_sz);
- if (ret)
- return (ret == -FDT_ERR_NOSPACE ? -ENOMEM : -EINVAL);
-
- /* add linux,usable-memory-range */
- ret = fdt_appendprop_addrrange(dtb, 0, off,
- FDT_PROP_MEM_RANGE,
- crashk_res.start,
- crashk_res.end - crashk_res.start + 1);
- if (ret)
- return (ret == -FDT_ERR_NOSPACE ? -ENOMEM : -EINVAL);
- }
-
- /* add bootargs */
- if (cmdline) {
- ret = fdt_setprop_string(dtb, off, FDT_PROP_BOOTARGS, cmdline);
- if (ret)
- goto out;
- } else {
- ret = fdt_delprop(dtb, off, FDT_PROP_BOOTARGS);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
- }
-
- /* add initrd-* */
- if (initrd_load_addr) {
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_INITRD_START,
- initrd_load_addr);
- if (ret)
- goto out;
-
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_INITRD_END,
- initrd_load_addr + initrd_len);
- if (ret)
- goto out;
- } else {
- ret = fdt_delprop(dtb, off, FDT_PROP_INITRD_START);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
-
- ret = fdt_delprop(dtb, off, FDT_PROP_INITRD_END);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
- }
-
- /* add kaslr-seed */
- ret = fdt_delprop(dtb, off, FDT_PROP_KASLR_SEED);
- if (ret == -FDT_ERR_NOTFOUND)
- ret = 0;
- else if (ret)
- goto out;
-
- if (rng_is_initialized()) {
- u64 seed = get_random_u64();
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_KASLR_SEED, seed);
- if (ret)
- goto out;
- } else {
- pr_notice("RNG is not initialised: omitting \"%s\" property\n",
- FDT_PROP_KASLR_SEED);
- }
-
- /* add rng-seed */
- if (rng_is_initialized()) {
- void *rng_seed;
- ret = fdt_setprop_placeholder(dtb, off, FDT_PROP_RNG_SEED,
- RNG_SEED_SIZE, &rng_seed);
- if (ret)
- goto out;
- get_random_bytes(rng_seed, RNG_SEED_SIZE);
- } else {
- pr_notice("RNG is not initialised: omitting \"%s\" property\n",
- FDT_PROP_RNG_SEED);
- }
-
-out:
- if (ret)
- return (ret == -FDT_ERR_NOSPACE) ? -ENOMEM : -EINVAL;
-
- return 0;
-}
-
-/*
- * More space needed so that we can add initrd, bootargs, kaslr-seed,
- * rng-seed, userable-memory-range and elfcorehdr.
- */
-#define DTB_EXTRA_SPACE 0x1000
-
-static int create_dtb(struct kimage *image,
- unsigned long initrd_load_addr, unsigned long initrd_len,
- char *cmdline, void **dtb)
-{
- void *buf;
- size_t buf_size;
- size_t cmdline_len;
- int ret;
-
- cmdline_len = cmdline ? strlen(cmdline) : 0;
- buf_size = fdt_totalsize(initial_boot_params)
- + cmdline_len + DTB_EXTRA_SPACE;
-
- for (;;) {
- buf = vmalloc(buf_size);
- if (!buf)
- return -ENOMEM;
-
- /* duplicate a device tree blob */
- ret = fdt_open_into(initial_boot_params, buf, buf_size);
- if (ret)
- return -EINVAL;
-
- ret = setup_dtb(image, initrd_load_addr, initrd_len,
- cmdline, buf);
- if (ret) {
- vfree(buf);
- if (ret == -ENOMEM) {
- /* unlikely, but just in case */
- buf_size += DTB_EXTRA_SPACE;
- continue;
- } else {
- return ret;
- }
- }
-
- /* trim it */
- fdt_pack(buf);
- *dtb = buf;
-
- return 0;
- }
-}
-
static int prepare_elf_headers(void **addr, unsigned long *sz)
{
struct crash_mem *cmem;
@@ -312,12 +145,15 @@ int load_other_segments(struct kimage *image,
}
/* load dtb */
- ret = create_dtb(image, initrd_load_addr, initrd_len, cmdline, &dtb);
- if (ret) {
+ dtb = of_kexec_alloc_and_setup_fdt(image, initrd_load_addr,
+ initrd_len, cmdline, 0);
+ if (!dtb) {
pr_err("Preparing for new dtb failed\n");
goto out_err;
}
+ /* trim it */
+ fdt_pack(dtb);
dtb_len = fdt_totalsize(dtb);
kbuf.buffer = dtb;
kbuf.bufsz = dtb_len;
@@ -341,6 +177,6 @@ int load_other_segments(struct kimage *image,
out_err:
image->nr_segments = orig_segments;
- vfree(dtb);
+ kvfree(dtb);
return ret;
}
--
2.30.0
^ permalink raw reply related
* [PATCH v18 02/11] arm64: Rename kexec elf_headers_mem to elf_load_addr
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
The architecture specific field, elf_headers_mem in struct kimage_arch,
that holds the address of the buffer in memory for ELF core header for
arm64 has a different name than the one used for powerpc. This makes
it hard to have a common code for setting up the device tree for
kexec system call.
Rename elf_headers_mem to elf_load_addr to align with powerpc name so
common code can use it.
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/arm64/include/asm/kexec.h | 2 +-
arch/arm64/kernel/machine_kexec_file.c | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
index d24b527e8c00..e6a99dfdffb8 100644
--- a/arch/arm64/include/asm/kexec.h
+++ b/arch/arm64/include/asm/kexec.h
@@ -98,7 +98,7 @@ struct kimage_arch {
unsigned long dtb_mem;
/* Core ELF header buffer */
void *elf_headers;
- unsigned long elf_headers_mem;
+ unsigned long elf_load_addr;
unsigned long elf_headers_sz;
};
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 03210f644790..d98bacec9426 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -73,7 +73,7 @@ static int setup_dtb(struct kimage *image,
/* add linux,elfcorehdr */
ret = fdt_appendprop_addrrange(dtb, 0, off,
FDT_PROP_KEXEC_ELFHDR,
- image->arch.elf_headers_mem,
+ image->arch.elf_load_addr,
image->arch.elf_headers_sz);
if (ret)
return (ret == -FDT_ERR_NOSPACE ? -ENOMEM : -EINVAL);
@@ -283,11 +283,11 @@ int load_other_segments(struct kimage *image,
goto out_err;
}
image->arch.elf_headers = headers;
- image->arch.elf_headers_mem = kbuf.mem;
+ image->arch.elf_load_addr = kbuf.mem;
image->arch.elf_headers_sz = headers_sz;
pr_debug("Loaded elf core header at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
- image->arch.elf_headers_mem, kbuf.bufsz, kbuf.memsz);
+ image->arch.elf_load_addr, kbuf.bufsz, kbuf.memsz);
}
/* load initrd */
--
2.30.0
^ permalink raw reply related
* [PATCH v18 01/11] powerpc: Rename kexec elfcorehdr_addr to elf_load_addr
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
From: Rob Herring <robh@kernel.org>
The architecture specific field, elfcorehdr_addr in struct kimage_arch,
that holds the address of the buffer in memory for ELF core header for
powerpc has a different name than the one used for x86_64. This makes
it hard to have a common code for setting up the device tree for
kexec system call.
Rename elfcorehdr_addr to elf_load_addr to align with x86_64 name so
common code can use it.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
---
arch/powerpc/include/asm/kexec.h | 2 +-
arch/powerpc/kexec/file_load.c | 4 ++--
arch/powerpc/kexec/file_load_64.c | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 55d6ede30c19..4d9b250cf1e6 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -108,7 +108,7 @@ struct kimage_arch {
unsigned long backup_start;
void *backup_buf;
- unsigned long elfcorehdr_addr;
+ unsigned long elf_load_addr;
unsigned long elf_headers_sz;
void *elf_headers;
diff --git a/arch/powerpc/kexec/file_load.c b/arch/powerpc/kexec/file_load.c
index 9a232bc36c8f..f7c31daf8a2e 100644
--- a/arch/powerpc/kexec/file_load.c
+++ b/arch/powerpc/kexec/file_load.c
@@ -45,7 +45,7 @@ char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
return NULL;
elfcorehdr_strlen = sprintf(cmdline_ptr, "elfcorehdr=0x%lx ",
- image->arch.elfcorehdr_addr);
+ image->arch.elf_load_addr);
if (elfcorehdr_strlen + cmdline_len > COMMAND_LINE_SIZE) {
pr_err("Appending elfcorehdr=<addr> exceeds cmdline size\n");
@@ -263,7 +263,7 @@ int setup_new_fdt(const struct kimage *image, void *fdt,
* Avoid elfcorehdr from being stomped on in kdump kernel by
* setting up memory reserve map.
*/
- ret = fdt_add_mem_rsv(fdt, image->arch.elfcorehdr_addr,
+ ret = fdt_add_mem_rsv(fdt, image->arch.elf_load_addr,
image->arch.elf_headers_sz);
if (ret) {
pr_err("Error reserving elfcorehdr memory: %s\n",
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index c69bcf9b547a..e539b7d401a2 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -815,7 +815,7 @@ static int load_elfcorehdr_segment(struct kimage *image, struct kexec_buf *kbuf)
goto out;
}
- image->arch.elfcorehdr_addr = kbuf->mem;
+ image->arch.elf_load_addr = kbuf->mem;
image->arch.elf_headers_sz = headers_sz;
image->arch.elf_headers = headers;
out:
@@ -851,7 +851,7 @@ int load_crashdump_segments_ppc64(struct kimage *image,
return ret;
}
pr_debug("Loaded elf core header at 0x%lx, bufsz=0x%lx memsz=0x%lx\n",
- image->arch.elfcorehdr_addr, kbuf->bufsz, kbuf->memsz);
+ image->arch.elf_load_addr, kbuf->bufsz, kbuf->memsz);
return 0;
}
--
2.30.0
^ permalink raw reply related
* [PATCH v18 06/11] powerpc: Move ima buffer fields to struct kimage
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
The fields ima_buffer_addr and ima_buffer_size in "struct kimage_arch"
for powerpc are used to carry forward the IMA measurement list across
kexec system call. These fields are not architecture specific, but are
currently limited to powerpc.
arch_ima_add_kexec_buffer() defined in "arch/powerpc/kexec/ima.c"
sets ima_buffer_addr and ima_buffer_size for the kexec system call.
This function does not have architecture specific code, but is
currently limited to powerpc.
Move ima_buffer_addr and ima_buffer_size to "struct kimage".
Set ima_buffer_addr and ima_buffer_size in ima_add_kexec_buffer()
in security/integrity/ima/ima_kexec.c.
Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Will Deacon <will@kernel.org>
---
arch/powerpc/include/asm/ima.h | 3 ---
arch/powerpc/include/asm/kexec.h | 5 -----
arch/powerpc/kexec/ima.c | 29 ++++++-----------------------
include/linux/kexec.h | 3 +++
security/integrity/ima/ima_kexec.c | 8 ++------
5 files changed, 11 insertions(+), 37 deletions(-)
diff --git a/arch/powerpc/include/asm/ima.h b/arch/powerpc/include/asm/ima.h
index ead488cf3981..51f64fd06c19 100644
--- a/arch/powerpc/include/asm/ima.h
+++ b/arch/powerpc/include/asm/ima.h
@@ -14,9 +14,6 @@ static inline void remove_ima_buffer(void *fdt, int chosen_node) {}
#endif
#ifdef CONFIG_IMA_KEXEC
-int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr,
- size_t size);
-
int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node);
#else
static inline int setup_ima_buffer(const struct kimage *image, void *fdt,
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index f59946c6f9e6..877db8354e01 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -112,11 +112,6 @@ struct kimage_arch {
unsigned long elf_headers_sz;
void *elf_headers;
void *fdt;
-
-#ifdef CONFIG_IMA_KEXEC
- phys_addr_t ima_buffer_addr;
- size_t ima_buffer_size;
-#endif
};
char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
diff --git a/arch/powerpc/kexec/ima.c b/arch/powerpc/kexec/ima.c
index 720e50e490b6..ed38125e2f87 100644
--- a/arch/powerpc/kexec/ima.c
+++ b/arch/powerpc/kexec/ima.c
@@ -128,23 +128,6 @@ void remove_ima_buffer(void *fdt, int chosen_node)
}
#ifdef CONFIG_IMA_KEXEC
-/**
- * arch_ima_add_kexec_buffer - do arch-specific steps to add the IMA buffer
- *
- * Architectures should use this function to pass on the IMA buffer
- * information to the next kernel.
- *
- * Return: 0 on success, negative errno on error.
- */
-int arch_ima_add_kexec_buffer(struct kimage *image, unsigned long load_addr,
- size_t size)
-{
- image->arch.ima_buffer_addr = load_addr;
- image->arch.ima_buffer_size = size;
-
- return 0;
-}
-
static int write_number(void *p, u64 value, int cells)
{
if (cells == 1) {
@@ -180,7 +163,7 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node)
u8 value[16];
remove_ima_buffer(fdt, chosen_node);
- if (!image->arch.ima_buffer_size)
+ if (!image->ima_buffer_size)
return 0;
ret = get_addr_size_cells(&addr_cells, &size_cells);
@@ -192,11 +175,11 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node)
if (entry_size > sizeof(value))
return -EINVAL;
- ret = write_number(value, image->arch.ima_buffer_addr, addr_cells);
+ ret = write_number(value, image->ima_buffer_addr, addr_cells);
if (ret)
return ret;
- ret = write_number(value + 4 * addr_cells, image->arch.ima_buffer_size,
+ ret = write_number(value + 4 * addr_cells, image->ima_buffer_size,
size_cells);
if (ret)
return ret;
@@ -206,13 +189,13 @@ int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node)
if (ret < 0)
return -EINVAL;
- ret = fdt_add_mem_rsv(fdt, image->arch.ima_buffer_addr,
- image->arch.ima_buffer_size);
+ ret = fdt_add_mem_rsv(fdt, image->ima_buffer_addr,
+ image->ima_buffer_size);
if (ret)
return -EINVAL;
pr_debug("IMA buffer at 0x%llx, size = 0x%zx\n",
- image->arch.ima_buffer_addr, image->arch.ima_buffer_size);
+ image->ima_buffer_addr, image->ima_buffer_size);
return 0;
}
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 5f61389f5f36..75c670f0dfbb 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -304,6 +304,9 @@ struct kimage {
#ifdef CONFIG_IMA_KEXEC
/* Virtual address of IMA measurement buffer for kexec syscall */
void *ima_buffer;
+
+ phys_addr_t ima_buffer_addr;
+ size_t ima_buffer_size;
#endif
};
diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c
index e29bea3dd4cc..8b1a3d50c49c 100644
--- a/security/integrity/ima/ima_kexec.c
+++ b/security/integrity/ima/ima_kexec.c
@@ -123,12 +123,8 @@ void ima_add_kexec_buffer(struct kimage *image)
return;
}
- ret = arch_ima_add_kexec_buffer(image, kbuf.mem, kexec_segment_size);
- if (ret) {
- pr_err("Error passing over kexec measurement buffer.\n");
- return;
- }
-
+ image->ima_buffer_addr = kbuf.mem;
+ image->ima_buffer_size = kexec_segment_size;
image->ima_buffer = kexec_buffer;
pr_debug("kexec measurement buffer for the loaded kernel at 0x%lx.\n",
--
2.30.0
^ permalink raw reply related
* [PATCH v18 05/11] powerpc: Use common of_kexec_alloc_and_setup_fdt()
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
From: Rob Herring <robh@kernel.org>
The code for setting up the /chosen node in the device tree
and updating the memory reservation for the next kernel has been
moved to of_kexec_alloc_and_setup_fdt() defined in "drivers/of/kexec.c".
Use the common of_kexec_alloc_and_setup_fdt() to setup the device tree
and update the memory reservation for kexec for powerpc.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
---
arch/powerpc/include/asm/kexec.h | 1 +
arch/powerpc/kexec/elf_64.c | 30 ++++---
arch/powerpc/kexec/file_load.c | 132 +-----------------------------
arch/powerpc/kexec/file_load_64.c | 3 +
4 files changed, 26 insertions(+), 140 deletions(-)
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 4d9b250cf1e6..f59946c6f9e6 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -111,6 +111,7 @@ struct kimage_arch {
unsigned long elf_load_addr;
unsigned long elf_headers_sz;
void *elf_headers;
+ void *fdt;
#ifdef CONFIG_IMA_KEXEC
phys_addr_t ima_buffer_addr;
diff --git a/arch/powerpc/kexec/elf_64.c b/arch/powerpc/kexec/elf_64.c
index d0e459bb2f05..87e34611f93d 100644
--- a/arch/powerpc/kexec/elf_64.c
+++ b/arch/powerpc/kexec/elf_64.c
@@ -19,6 +19,7 @@
#include <linux/kexec.h>
#include <linux/libfdt.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/slab.h>
#include <linux/types.h>
@@ -29,7 +30,6 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
unsigned long cmdline_len)
{
int ret;
- unsigned int fdt_size;
unsigned long kernel_load_addr;
unsigned long initrd_load_addr = 0, fdt_load_addr;
void *fdt;
@@ -102,15 +102,10 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
pr_debug("Loaded initrd at 0x%lx\n", initrd_load_addr);
}
- fdt_size = fdt_totalsize(initial_boot_params) * 2;
- fdt = kmalloc(fdt_size, GFP_KERNEL);
+ fdt = of_kexec_alloc_and_setup_fdt(image, initrd_load_addr,
+ initrd_len, cmdline,
+ fdt_totalsize(initial_boot_params));
if (!fdt) {
- pr_err("Not enough memory for the device tree.\n");
- ret = -ENOMEM;
- goto out;
- }
- ret = fdt_open_into(initial_boot_params, fdt, fdt_size);
- if (ret < 0) {
pr_err("Error setting up the new device tree.\n");
ret = -EINVAL;
goto out;
@@ -124,13 +119,17 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
fdt_pack(fdt);
kbuf.buffer = fdt;
- kbuf.bufsz = kbuf.memsz = fdt_size;
+ kbuf.bufsz = kbuf.memsz = fdt_totalsize(fdt);
kbuf.buf_align = PAGE_SIZE;
kbuf.top_down = true;
kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
ret = kexec_add_buffer(&kbuf);
if (ret)
goto out;
+
+ /* FDT will be freed in arch_kimage_file_post_load_cleanup */
+ image->arch.fdt = fdt;
+
fdt_load_addr = kbuf.mem;
pr_debug("Loaded device tree at 0x%lx\n", fdt_load_addr);
@@ -145,8 +144,15 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
kfree(modified_cmdline);
kexec_free_elf_info(&elf_info);
- /* Make kimage_file_post_load_cleanup free the fdt buffer for us. */
- return ret ? ERR_PTR(ret) : fdt;
+ /*
+ * Once FDT buffer has been successfully passed to kexec_add_buffer(),
+ * the FDT buffer address is saved in image->arch.fdt. In that case,
+ * the memory cannot be freed here in case of any other error.
+ */
+ if (ret && !image->arch.fdt)
+ kvfree(fdt);
+
+ return ret ? ERR_PTR(ret) : NULL;
}
const struct kexec_file_ops kexec_elf64_ops = {
diff --git a/arch/powerpc/kexec/file_load.c b/arch/powerpc/kexec/file_load.c
index f7c31daf8a2e..af5a4724a70e 100644
--- a/arch/powerpc/kexec/file_load.c
+++ b/arch/powerpc/kexec/file_load.c
@@ -156,135 +156,11 @@ int setup_new_fdt(const struct kimage *image, void *fdt,
unsigned long initrd_load_addr, unsigned long initrd_len,
const char *cmdline)
{
- int ret, chosen_node;
- const void *prop;
-
- /* Remove memory reservation for the current device tree. */
- ret = delete_fdt_mem_rsv(fdt, __pa(initial_boot_params),
- fdt_totalsize(initial_boot_params));
- if (ret == 0)
- pr_debug("Removed old device tree reservation.\n");
- else if (ret != -ENOENT)
- return ret;
-
- chosen_node = fdt_path_offset(fdt, "/chosen");
- if (chosen_node == -FDT_ERR_NOTFOUND) {
- chosen_node = fdt_add_subnode(fdt, fdt_path_offset(fdt, "/"),
- "chosen");
- if (chosen_node < 0) {
- pr_err("Error creating /chosen.\n");
- return -EINVAL;
- }
- } else if (chosen_node < 0) {
- pr_err("Malformed device tree: error reading /chosen.\n");
- return -EINVAL;
- }
-
- /* Did we boot using an initrd? */
- prop = fdt_getprop(fdt, chosen_node, "linux,initrd-start", NULL);
- if (prop) {
- uint64_t tmp_start, tmp_end, tmp_size;
-
- tmp_start = fdt64_to_cpu(*((const fdt64_t *) prop));
-
- prop = fdt_getprop(fdt, chosen_node, "linux,initrd-end", NULL);
- if (!prop) {
- pr_err("Malformed device tree.\n");
- return -EINVAL;
- }
- tmp_end = fdt64_to_cpu(*((const fdt64_t *) prop));
-
- /*
- * kexec reserves exact initrd size, while firmware may
- * reserve a multiple of PAGE_SIZE, so check for both.
- */
- tmp_size = tmp_end - tmp_start;
- ret = delete_fdt_mem_rsv(fdt, tmp_start, tmp_size);
- if (ret == -ENOENT)
- ret = delete_fdt_mem_rsv(fdt, tmp_start,
- round_up(tmp_size, PAGE_SIZE));
- if (ret == 0)
- pr_debug("Removed old initrd reservation.\n");
- else if (ret != -ENOENT)
- return ret;
-
- /* If there's no new initrd, delete the old initrd's info. */
- if (initrd_len == 0) {
- ret = fdt_delprop(fdt, chosen_node,
- "linux,initrd-start");
- if (ret) {
- pr_err("Error deleting linux,initrd-start.\n");
- return -EINVAL;
- }
-
- ret = fdt_delprop(fdt, chosen_node, "linux,initrd-end");
- if (ret) {
- pr_err("Error deleting linux,initrd-end.\n");
- return -EINVAL;
- }
- }
- }
-
- if (initrd_len) {
- ret = fdt_setprop_u64(fdt, chosen_node,
- "linux,initrd-start",
- initrd_load_addr);
- if (ret < 0)
- goto err;
-
- /* initrd-end is the first address after the initrd image. */
- ret = fdt_setprop_u64(fdt, chosen_node, "linux,initrd-end",
- initrd_load_addr + initrd_len);
- if (ret < 0)
- goto err;
-
- ret = fdt_add_mem_rsv(fdt, initrd_load_addr, initrd_len);
- if (ret) {
- pr_err("Error reserving initrd memory: %s\n",
- fdt_strerror(ret));
- return -EINVAL;
- }
- }
-
- if (cmdline != NULL) {
- ret = fdt_setprop_string(fdt, chosen_node, "bootargs", cmdline);
- if (ret < 0)
- goto err;
- } else {
- ret = fdt_delprop(fdt, chosen_node, "bootargs");
- if (ret && ret != -FDT_ERR_NOTFOUND) {
- pr_err("Error deleting bootargs.\n");
- return -EINVAL;
- }
- }
-
- if (image->type == KEXEC_TYPE_CRASH) {
- /*
- * Avoid elfcorehdr from being stomped on in kdump kernel by
- * setting up memory reserve map.
- */
- ret = fdt_add_mem_rsv(fdt, image->arch.elf_load_addr,
- image->arch.elf_headers_sz);
- if (ret) {
- pr_err("Error reserving elfcorehdr memory: %s\n",
- fdt_strerror(ret));
- goto err;
- }
- }
-
- ret = setup_ima_buffer(image, fdt, chosen_node);
- if (ret) {
- pr_err("Error setting up the new device tree.\n");
- return ret;
- }
+ int ret;
- ret = fdt_setprop(fdt, chosen_node, "linux,booted-from-kexec", NULL, 0);
+ ret = setup_ima_buffer(image, fdt, fdt_path_offset(fdt, "/chosen"));
if (ret)
- goto err;
-
- return 0;
+ pr_err("Error setting up the new device tree.\n");
-err:
- pr_err("Error setting up the new device tree.\n");
- return -EINVAL;
+ return ret;
}
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index e539b7d401a2..0463ed8ff9ea 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -1111,5 +1111,8 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image)
image->arch.elf_headers = NULL;
image->arch.elf_headers_sz = 0;
+ kvfree(image->arch.fdt);
+ image->arch.fdt = NULL;
+
return kexec_image_post_load_cleanup_default(image);
}
--
2.30.0
^ permalink raw reply related
* [PATCH v18 07/11] powerpc: Enable passing IMA log to next kernel on kexec
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
CONFIG_HAVE_IMA_KEXEC is enabled to indicate that the IMA measurement
log information is present in the device tree. This should be selected
only if CONFIG_IMA is enabled.
Update CONFIG_KEXEC_FILE to select CONFIG_HAVE_IMA_KEXEC, if CONFIG_IMA
is enabled, to indicate that the IMA measurement log information is
present in the device tree for powerpc.
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/powerpc/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 107bb4319e0e..d6e593ad270e 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -554,7 +554,7 @@ config KEXEC
config KEXEC_FILE
bool "kexec file based system call"
select KEXEC_CORE
- select HAVE_IMA_KEXEC
+ select HAVE_IMA_KEXEC if IMA
select BUILD_BIN2C
select KEXEC_ELF
depends on PPC64
--
2.30.0
^ permalink raw reply related
* [PATCH v18 08/11] powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
The functions defined in "arch/powerpc/kexec/ima.c" handle setting up
and freeing the resources required to carry over the IMA measurement
list from the current kernel to the next kernel across kexec system call.
These functions do not have architecture specific code, but are
currently limited to powerpc.
Move remove_ima_buffer() and setup_ima_buffer() calls into
of_kexec_alloc_and_setup_fdt() defined in "drivers/of/kexec.c".
Move the remaining architecture independent functions from
"arch/powerpc/kexec/ima.c" to "drivers/of/kexec.c".
Delete "arch/powerpc/kexec/ima.c" and "arch/powerpc/include/asm/ima.h".
Remove references to the deleted files and functions in powerpc and
in ima.
Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/powerpc/include/asm/ima.h | 27 ----
arch/powerpc/include/asm/kexec.h | 3 -
arch/powerpc/kexec/Makefile | 7 -
arch/powerpc/kexec/file_load.c | 25 ---
arch/powerpc/kexec/file_load_64.c | 4 -
arch/powerpc/kexec/ima.c | 202 ------------------------
drivers/of/kexec.c | 240 +++++++++++++++++++++++++++++
include/linux/of.h | 2 +
security/integrity/ima/ima.h | 4 -
security/integrity/ima/ima_kexec.c | 1 +
10 files changed, 243 insertions(+), 272 deletions(-)
delete mode 100644 arch/powerpc/include/asm/ima.h
delete mode 100644 arch/powerpc/kexec/ima.c
diff --git a/arch/powerpc/include/asm/ima.h b/arch/powerpc/include/asm/ima.h
deleted file mode 100644
index 51f64fd06c19..000000000000
--- a/arch/powerpc/include/asm/ima.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_POWERPC_IMA_H
-#define _ASM_POWERPC_IMA_H
-
-struct kimage;
-
-int ima_get_kexec_buffer(void **addr, size_t *size);
-int ima_free_kexec_buffer(void);
-
-#ifdef CONFIG_IMA
-void remove_ima_buffer(void *fdt, int chosen_node);
-#else
-static inline void remove_ima_buffer(void *fdt, int chosen_node) {}
-#endif
-
-#ifdef CONFIG_IMA_KEXEC
-int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node);
-#else
-static inline int setup_ima_buffer(const struct kimage *image, void *fdt,
- int chosen_node)
-{
- remove_ima_buffer(fdt, chosen_node);
- return 0;
-}
-#endif /* CONFIG_IMA_KEXEC */
-
-#endif /* _ASM_POWERPC_IMA_H */
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 877db8354e01..783f6c4f3df9 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -119,9 +119,6 @@ char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
int setup_purgatory(struct kimage *image, const void *slave_code,
const void *fdt, unsigned long kernel_load_addr,
unsigned long fdt_load_addr);
-int setup_new_fdt(const struct kimage *image, void *fdt,
- unsigned long initrd_load_addr, unsigned long initrd_len,
- const char *cmdline);
int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
#ifdef CONFIG_PPC64
diff --git a/arch/powerpc/kexec/Makefile b/arch/powerpc/kexec/Makefile
index 4aff6846c772..b6c52608cb49 100644
--- a/arch/powerpc/kexec/Makefile
+++ b/arch/powerpc/kexec/Makefile
@@ -9,13 +9,6 @@ obj-$(CONFIG_PPC32) += relocate_32.o
obj-$(CONFIG_KEXEC_FILE) += file_load.o ranges.o file_load_$(BITS).o elf_$(BITS).o
-ifdef CONFIG_HAVE_IMA_KEXEC
-ifdef CONFIG_IMA
-obj-y += ima.o
-endif
-endif
-
-
# Disable GCOV, KCOV & sanitizers in odd or sensitive code
GCOV_PROFILE_core_$(BITS).o := n
KCOV_INSTRUMENT_core_$(BITS).o := n
diff --git a/arch/powerpc/kexec/file_load.c b/arch/powerpc/kexec/file_load.c
index af5a4724a70e..372fa5865413 100644
--- a/arch/powerpc/kexec/file_load.c
+++ b/arch/powerpc/kexec/file_load.c
@@ -19,7 +19,6 @@
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
#include <asm/setup.h>
-#include <asm/ima.h>
#define SLAVE_CODE_SIZE 256 /* First 0x100 bytes */
@@ -140,27 +139,3 @@ int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size)
return -ENOENT;
}
-
-/*
- * setup_new_fdt - modify /chosen and memory reservation for the next kernel
- * @image: kexec image being loaded.
- * @fdt: Flattened device tree for the next kernel.
- * @initrd_load_addr: Address where the next initrd will be loaded.
- * @initrd_len: Size of the next initrd, or 0 if there will be none.
- * @cmdline: Command line for the next kernel, or NULL if there will
- * be none.
- *
- * Return: 0 on success, or negative errno on error.
- */
-int setup_new_fdt(const struct kimage *image, void *fdt,
- unsigned long initrd_load_addr, unsigned long initrd_len,
- const char *cmdline)
-{
- int ret;
-
- ret = setup_ima_buffer(image, fdt, fdt_path_offset(fdt, "/chosen"));
- if (ret)
- pr_err("Error setting up the new device tree.\n");
-
- return ret;
-}
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index 0463ed8ff9ea..2b3647ecfce4 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -944,10 +944,6 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
struct crash_mem *umem = NULL, *rmem = NULL;
int i, nr_ranges, ret;
- ret = setup_new_fdt(image, fdt, initrd_load_addr, initrd_len, cmdline);
- if (ret)
- goto out;
-
/*
* Restrict memory usage for kdump kernel by setting up
* usable memory ranges and memory reserve map.
diff --git a/arch/powerpc/kexec/ima.c b/arch/powerpc/kexec/ima.c
deleted file mode 100644
index ed38125e2f87..000000000000
--- a/arch/powerpc/kexec/ima.c
+++ /dev/null
@@ -1,202 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2016 IBM Corporation
- *
- * Authors:
- * Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
- */
-
-#include <linux/slab.h>
-#include <linux/kexec.h>
-#include <linux/of.h>
-#include <linux/memblock.h>
-#include <linux/libfdt.h>
-
-static int get_addr_size_cells(int *addr_cells, int *size_cells)
-{
- struct device_node *root;
-
- root = of_find_node_by_path("/");
- if (!root)
- return -EINVAL;
-
- *addr_cells = of_n_addr_cells(root);
- *size_cells = of_n_size_cells(root);
-
- of_node_put(root);
-
- return 0;
-}
-
-static int do_get_kexec_buffer(const void *prop, int len, unsigned long *addr,
- size_t *size)
-{
- int ret, addr_cells, size_cells;
-
- ret = get_addr_size_cells(&addr_cells, &size_cells);
- if (ret)
- return ret;
-
- if (len < 4 * (addr_cells + size_cells))
- return -ENOENT;
-
- *addr = of_read_number(prop, addr_cells);
- *size = of_read_number(prop + 4 * addr_cells, size_cells);
-
- return 0;
-}
-
-/**
- * ima_get_kexec_buffer - get IMA buffer from the previous kernel
- * @addr: On successful return, set to point to the buffer contents.
- * @size: On successful return, set to the buffer size.
- *
- * Return: 0 on success, negative errno on error.
- */
-int ima_get_kexec_buffer(void **addr, size_t *size)
-{
- int ret, len;
- unsigned long tmp_addr;
- size_t tmp_size;
- const void *prop;
-
- prop = of_get_property(of_chosen, "linux,ima-kexec-buffer", &len);
- if (!prop)
- return -ENOENT;
-
- ret = do_get_kexec_buffer(prop, len, &tmp_addr, &tmp_size);
- if (ret)
- return ret;
-
- *addr = __va(tmp_addr);
- *size = tmp_size;
-
- return 0;
-}
-
-/**
- * ima_free_kexec_buffer - free memory used by the IMA buffer
- */
-int ima_free_kexec_buffer(void)
-{
- int ret;
- unsigned long addr;
- size_t size;
- struct property *prop;
-
- prop = of_find_property(of_chosen, "linux,ima-kexec-buffer", NULL);
- if (!prop)
- return -ENOENT;
-
- ret = do_get_kexec_buffer(prop->value, prop->length, &addr, &size);
- if (ret)
- return ret;
-
- ret = of_remove_property(of_chosen, prop);
- if (ret)
- return ret;
-
- return memblock_free(addr, size);
-
-}
-
-/**
- * remove_ima_buffer - remove the IMA buffer property and reservation from @fdt
- *
- * The IMA measurement buffer is of no use to a subsequent kernel, so we always
- * remove it from the device tree.
- */
-void remove_ima_buffer(void *fdt, int chosen_node)
-{
- int ret, len;
- unsigned long addr;
- size_t size;
- const void *prop;
-
- prop = fdt_getprop(fdt, chosen_node, "linux,ima-kexec-buffer", &len);
- if (!prop)
- return;
-
- ret = do_get_kexec_buffer(prop, len, &addr, &size);
- fdt_delprop(fdt, chosen_node, "linux,ima-kexec-buffer");
- if (ret)
- return;
-
- ret = delete_fdt_mem_rsv(fdt, addr, size);
- if (!ret)
- pr_debug("Removed old IMA buffer reservation.\n");
-}
-
-#ifdef CONFIG_IMA_KEXEC
-static int write_number(void *p, u64 value, int cells)
-{
- if (cells == 1) {
- u32 tmp;
-
- if (value > U32_MAX)
- return -EINVAL;
-
- tmp = cpu_to_be32(value);
- memcpy(p, &tmp, sizeof(tmp));
- } else if (cells == 2) {
- u64 tmp;
-
- tmp = cpu_to_be64(value);
- memcpy(p, &tmp, sizeof(tmp));
- } else
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * setup_ima_buffer - add IMA buffer information to the fdt
- * @image: kexec image being loaded.
- * @fdt: Flattened device tree for the next kernel.
- * @chosen_node: Offset to the chosen node.
- *
- * Return: 0 on success, or negative errno on error.
- */
-int setup_ima_buffer(const struct kimage *image, void *fdt, int chosen_node)
-{
- int ret, addr_cells, size_cells, entry_size;
- u8 value[16];
-
- remove_ima_buffer(fdt, chosen_node);
- if (!image->ima_buffer_size)
- return 0;
-
- ret = get_addr_size_cells(&addr_cells, &size_cells);
- if (ret)
- return ret;
-
- entry_size = 4 * (addr_cells + size_cells);
-
- if (entry_size > sizeof(value))
- return -EINVAL;
-
- ret = write_number(value, image->ima_buffer_addr, addr_cells);
- if (ret)
- return ret;
-
- ret = write_number(value + 4 * addr_cells, image->ima_buffer_size,
- size_cells);
- if (ret)
- return ret;
-
- ret = fdt_setprop(fdt, chosen_node, "linux,ima-kexec-buffer", value,
- entry_size);
- if (ret < 0)
- return -EINVAL;
-
- ret = fdt_add_mem_rsv(fdt, image->ima_buffer_addr,
- image->ima_buffer_size);
- if (ret)
- return -EINVAL;
-
- pr_debug("IMA buffer at 0x%llx, size = 0x%zx\n",
- image->ima_buffer_addr, image->ima_buffer_size);
-
- return 0;
-}
-#endif /* CONFIG_IMA_KEXEC */
diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
index 264cac0fd4cd..8f9ce5c7f47b 100644
--- a/drivers/of/kexec.c
+++ b/drivers/of/kexec.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/kexec.h>
+#include <linux/memblock.h>
#include <linux/libfdt.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
@@ -69,6 +70,240 @@ static int fdt_find_and_del_mem_rsv(void *fdt, unsigned long start, unsigned lon
return -ENOENT;
}
+/**
+ * get_addr_size_cells - Get address and size of root node
+ *
+ * @addr_cells: Return address of the root node
+ * @size_cells: Return size of the root node
+ *
+ * Return: 0 on success, or negative errno on error.
+ */
+static int get_addr_size_cells(int *addr_cells, int *size_cells)
+{
+ struct device_node *root;
+
+ root = of_find_node_by_path("/");
+ if (!root)
+ return -EINVAL;
+
+ *addr_cells = of_n_addr_cells(root);
+ *size_cells = of_n_size_cells(root);
+
+ of_node_put(root);
+
+ return 0;
+}
+
+/**
+ * do_get_kexec_buffer - Get address and size of device tree property
+ *
+ * @prop: Device tree property
+ * @len: Size of @prop
+ * @addr: Return address of the node
+ * @size: Return size of the node
+ *
+ * Return: 0 on success, or negative errno on error.
+ */
+static int do_get_kexec_buffer(const void *prop, int len, unsigned long *addr,
+ size_t *size)
+{
+ int ret, addr_cells, size_cells;
+
+ ret = get_addr_size_cells(&addr_cells, &size_cells);
+ if (ret)
+ return ret;
+
+ if (len < 4 * (addr_cells + size_cells))
+ return -ENOENT;
+
+ *addr = of_read_number(prop, addr_cells);
+ *size = of_read_number(prop + 4 * addr_cells, size_cells);
+
+ return 0;
+}
+
+/**
+ * ima_get_kexec_buffer - get IMA buffer from the previous kernel
+ * @addr: On successful return, set to point to the buffer contents.
+ * @size: On successful return, set to the buffer size.
+ *
+ * Return: 0 on success, negative errno on error.
+ */
+int ima_get_kexec_buffer(void **addr, size_t *size)
+{
+ int ret, len;
+ unsigned long tmp_addr;
+ size_t tmp_size;
+ const void *prop;
+
+ if (!IS_ENABLED(CONFIG_HAVE_IMA_KEXEC))
+ return -ENOTSUPP;
+
+ prop = of_get_property(of_chosen, "linux,ima-kexec-buffer", &len);
+ if (!prop)
+ return -ENOENT;
+
+ ret = do_get_kexec_buffer(prop, len, &tmp_addr, &tmp_size);
+ if (ret)
+ return ret;
+
+ *addr = __va(tmp_addr);
+ *size = tmp_size;
+
+ return 0;
+}
+
+/**
+ * ima_free_kexec_buffer - free memory used by the IMA buffer
+ */
+int ima_free_kexec_buffer(void)
+{
+ int ret;
+ unsigned long addr;
+ size_t size;
+ struct property *prop;
+
+ if (!IS_ENABLED(CONFIG_HAVE_IMA_KEXEC))
+ return -ENOTSUPP;
+
+ prop = of_find_property(of_chosen, "linux,ima-kexec-buffer", NULL);
+ if (!prop)
+ return -ENOENT;
+
+ ret = do_get_kexec_buffer(prop->value, prop->length, &addr, &size);
+ if (ret)
+ return ret;
+
+ ret = of_remove_property(of_chosen, prop);
+ if (ret)
+ return ret;
+
+ return memblock_free(addr, size);
+
+}
+
+/**
+ * remove_ima_buffer - remove the IMA buffer property and reservation from @fdt
+ *
+ * @fdt: Flattened Device Tree to update
+ * @chosen_node: Offset to the chosen node in the device tree
+ *
+ * The IMA measurement buffer is of no use to a subsequent kernel, so we always
+ * remove it from the device tree.
+ */
+static void remove_ima_buffer(void *fdt, int chosen_node)
+{
+ int ret, len;
+ unsigned long addr;
+ size_t size;
+ const void *prop;
+
+ if (!IS_ENABLED(CONFIG_HAVE_IMA_KEXEC))
+ return;
+
+ prop = fdt_getprop(fdt, chosen_node, "linux,ima-kexec-buffer", &len);
+ if (!prop)
+ return;
+
+ ret = do_get_kexec_buffer(prop, len, &addr, &size);
+ fdt_delprop(fdt, chosen_node, "linux,ima-kexec-buffer");
+ if (ret)
+ return;
+
+ ret = fdt_find_and_del_mem_rsv(fdt, addr, size);
+ if (!ret)
+ pr_debug("Removed old IMA buffer reservation.\n");
+}
+
+#ifdef CONFIG_IMA_KEXEC
+/**
+ * write_number - Convert number to big-endian format
+ *
+ * @p: Buffer to write the number to
+ * @value: Number to convert
+ * @cells: Number of cells
+ *
+ * Return: 0 on success, or negative errno on error.
+ */
+static int write_number(void *p, u64 value, int cells)
+{
+ if (cells == 1) {
+ u32 tmp;
+
+ if (value > U32_MAX)
+ return -EINVAL;
+
+ tmp = cpu_to_be32(value);
+ memcpy(p, &tmp, sizeof(tmp));
+ } else if (cells == 2) {
+ u64 tmp;
+
+ tmp = cpu_to_be64(value);
+ memcpy(p, &tmp, sizeof(tmp));
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * setup_ima_buffer - add IMA buffer information to the fdt
+ * @image: kexec image being loaded.
+ * @fdt: Flattened device tree for the next kernel.
+ * @chosen_node: Offset to the chosen node.
+ *
+ * Return: 0 on success, or negative errno on error.
+ */
+static int setup_ima_buffer(const struct kimage *image, void *fdt,
+ int chosen_node)
+{
+ int ret, addr_cells, size_cells, entry_size;
+ u8 value[16];
+
+ if (!image->ima_buffer_size)
+ return 0;
+
+ ret = get_addr_size_cells(&addr_cells, &size_cells);
+ if (ret)
+ return ret;
+
+ entry_size = 4 * (addr_cells + size_cells);
+
+ if (entry_size > sizeof(value))
+ return -EINVAL;
+
+ ret = write_number(value, image->ima_buffer_addr, addr_cells);
+ if (ret)
+ return ret;
+
+ ret = write_number(value + 4 * addr_cells, image->ima_buffer_size,
+ size_cells);
+ if (ret)
+ return ret;
+
+ ret = fdt_setprop(fdt, chosen_node, "linux,ima-kexec-buffer", value,
+ entry_size);
+ if (ret < 0)
+ return -EINVAL;
+
+ ret = fdt_add_mem_rsv(fdt, image->ima_buffer_addr,
+ image->ima_buffer_size);
+ if (ret)
+ return -EINVAL;
+
+ pr_debug("IMA buffer at 0x%llx, size = 0x%zx\n",
+ image->ima_buffer_addr, image->ima_buffer_size);
+
+ return 0;
+}
+#else /* CONFIG_IMA_KEXEC */
+static inline int setup_ima_buffer(const struct kimage *image, void *fdt,
+ int chosen_node)
+{
+ return 0;
+}
+#endif /* CONFIG_IMA_KEXEC */
+
/*
* of_kexec_alloc_and_setup_fdt - Alloc and setup a new Flattened Device Tree
*
@@ -254,6 +489,11 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
}
ret = fdt_setprop(fdt, chosen_node, "linux,booted-from-kexec", NULL, 0);
+ if (ret)
+ goto out;
+
+ remove_ima_buffer(fdt, chosen_node);
+ ret = setup_ima_buffer(image, fdt, fdt_path_offset(fdt, "/chosen"));
out:
if (ret) {
diff --git a/include/linux/of.h b/include/linux/of.h
index d66c915df910..e9209ef44cc0 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -565,6 +565,8 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
unsigned long initrd_load_addr,
unsigned long initrd_len,
const char *cmdline, size_t extra_fdt_size);
+int ima_get_kexec_buffer(void **addr, size_t *size);
+int ima_free_kexec_buffer(void);
#else /* CONFIG_OF */
static inline void of_core_init(void)
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 8e8b1e3cb847..cc0906cd3cd6 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -24,10 +24,6 @@
#include "../integrity.h"
-#ifdef CONFIG_HAVE_IMA_KEXEC
-#include <asm/ima.h>
-#endif
-
enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN,
IMA_SHOW_BINARY_OLD_STRING_FMT, IMA_SHOW_ASCII };
enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8, TPM_PCR10 = 10 };
diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c
index 8b1a3d50c49c..667887665823 100644
--- a/security/integrity/ima/ima_kexec.c
+++ b/security/integrity/ima/ima_kexec.c
@@ -10,6 +10,7 @@
#include <linux/seq_file.h>
#include <linux/vmalloc.h>
#include <linux/kexec.h>
+#include <linux/of.h>
#include "ima.h"
#ifdef CONFIG_IMA_KEXEC
--
2.30.0
^ permalink raw reply related
* [PATCH v18 09/11] kexec: Use fdt_appendprop_addrrange() to add ima buffer to FDT
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
fdt_appendprop_addrrange() function adds a property, with the given name,
to the device tree at the given node offset, and also sets the address
and size of the property. This function should be used to add
"linux,ima-kexec-buffer" property to the device tree and set the address
and size of the IMA measurement buffer, instead of using custom function.
Use fdt_appendprop_addrrange() to add "linux,ima-kexec-buffer" property
to the device tree. This property holds the address and size of
the IMA measurement buffer that needs to be passed from the current
kernel to the next kernel across kexec system call.
Remove custom code that is used in setup_ima_buffer() to add
"linux,ima-kexec-buffer" property to the device tree.
Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
drivers/of/kexec.c | 57 ++++------------------------------------------
1 file changed, 5 insertions(+), 52 deletions(-)
diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
index 8f9ce5c7f47b..5f7fc626f47f 100644
--- a/drivers/of/kexec.c
+++ b/drivers/of/kexec.c
@@ -216,36 +216,6 @@ static void remove_ima_buffer(void *fdt, int chosen_node)
}
#ifdef CONFIG_IMA_KEXEC
-/**
- * write_number - Convert number to big-endian format
- *
- * @p: Buffer to write the number to
- * @value: Number to convert
- * @cells: Number of cells
- *
- * Return: 0 on success, or negative errno on error.
- */
-static int write_number(void *p, u64 value, int cells)
-{
- if (cells == 1) {
- u32 tmp;
-
- if (value > U32_MAX)
- return -EINVAL;
-
- tmp = cpu_to_be32(value);
- memcpy(p, &tmp, sizeof(tmp));
- } else if (cells == 2) {
- u64 tmp;
-
- tmp = cpu_to_be64(value);
- memcpy(p, &tmp, sizeof(tmp));
- } else
- return -EINVAL;
-
- return 0;
-}
-
/**
* setup_ima_buffer - add IMA buffer information to the fdt
* @image: kexec image being loaded.
@@ -257,32 +227,15 @@ static int write_number(void *p, u64 value, int cells)
static int setup_ima_buffer(const struct kimage *image, void *fdt,
int chosen_node)
{
- int ret, addr_cells, size_cells, entry_size;
- u8 value[16];
+ int ret;
if (!image->ima_buffer_size)
return 0;
- ret = get_addr_size_cells(&addr_cells, &size_cells);
- if (ret)
- return ret;
-
- entry_size = 4 * (addr_cells + size_cells);
-
- if (entry_size > sizeof(value))
- return -EINVAL;
-
- ret = write_number(value, image->ima_buffer_addr, addr_cells);
- if (ret)
- return ret;
-
- ret = write_number(value + 4 * addr_cells, image->ima_buffer_size,
- size_cells);
- if (ret)
- return ret;
-
- ret = fdt_setprop(fdt, chosen_node, "linux,ima-kexec-buffer", value,
- entry_size);
+ ret = fdt_appendprop_addrrange(fdt, 0, chosen_node,
+ "linux,ima-kexec-buffer",
+ image->ima_buffer_addr,
+ image->ima_buffer_size);
if (ret < 0)
return -EINVAL;
--
2.30.0
^ permalink raw reply related
* [PATCH v18 10/11] powerpc: Delete unused function delete_fdt_mem_rsv()
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
delete_fdt_mem_rsv() defined in "arch/powerpc/kexec/file_load.c"
has been renamed to fdt_find_and_del_mem_rsv(), and moved to
"drivers/of/kexec.c".
Remove delete_fdt_mem_rsv() in "arch/powerpc/kexec/file_load.c".
Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/powerpc/include/asm/kexec.h | 1 -
arch/powerpc/kexec/file_load.c | 32 --------------------------------
2 files changed, 33 deletions(-)
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index 783f6c4f3df9..1718fe5ae8d4 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -119,7 +119,6 @@ char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
int setup_purgatory(struct kimage *image, const void *slave_code,
const void *fdt, unsigned long kernel_load_addr,
unsigned long fdt_load_addr);
-int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
#ifdef CONFIG_PPC64
struct kexec_buf;
diff --git a/arch/powerpc/kexec/file_load.c b/arch/powerpc/kexec/file_load.c
index 372fa5865413..264e2f66186d 100644
--- a/arch/powerpc/kexec/file_load.c
+++ b/arch/powerpc/kexec/file_load.c
@@ -107,35 +107,3 @@ int setup_purgatory(struct kimage *image, const void *slave_code,
return 0;
}
-
-/**
- * delete_fdt_mem_rsv - delete memory reservation with given address and size
- *
- * Return: 0 on success, or negative errno on error.
- */
-int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size)
-{
- int i, ret, num_rsvs = fdt_num_mem_rsv(fdt);
-
- for (i = 0; i < num_rsvs; i++) {
- uint64_t rsv_start, rsv_size;
-
- ret = fdt_get_mem_rsv(fdt, i, &rsv_start, &rsv_size);
- if (ret) {
- pr_err("Malformed device tree.\n");
- return -EINVAL;
- }
-
- if (rsv_start == start && rsv_size == size) {
- ret = fdt_del_mem_rsv(fdt, i);
- if (ret) {
- pr_err("Error deleting device tree reservation.\n");
- return -EINVAL;
- }
-
- return 0;
- }
- }
-
- return -ENOENT;
-}
--
2.30.0
^ permalink raw reply related
* [PATCH v18 11/11] arm64: Enable passing IMA log to next kernel on kexec
From: Lakshmi Ramasubramanian @ 2021-02-13 16:10 UTC (permalink / raw)
To: zohar, bauerman, robh, takahiro.akashi, gregkh, will, joe,
catalin.marinas, mpe
Cc: mark.rutland, tao.li, paulus, vincenzo.frascino, frowand.list,
sashal, masahiroy, jmorris, allison, serge, devicetree,
pasha.tatashin, prsriva, hsinyi, linux-arm-kernel,
christophe.leroy, mbrugger, balajib, dmitry.kasatkin,
linux-kernel, james.morse, linux-integrity, linuxppc-dev
In-Reply-To: <20210213161049.6190-1-nramas@linux.microsoft.com>
Update CONFIG_KEXEC_FILE to select CONFIG_HAVE_IMA_KEXEC, if CONFIG_IMA
is enabled, to indicate that the IMA measurement log information is
present in the device tree for ARM64.
Co-developed-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Prakhar Srivastava <prsriva@linux.microsoft.com>
Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Suggested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 05e17351e4f3..8a93573cebb6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1093,6 +1093,7 @@ config KEXEC
config KEXEC_FILE
bool "kexec file based system call"
select KEXEC_CORE
+ select HAVE_IMA_KEXEC if IMA
help
This is new version of kexec system call. This system call is
file based and takes file descriptors as system call argument
--
2.30.0
^ permalink raw reply related
* Re: [PATCH 21/27] sparc: remove wrong comment from arch/sparc/include/asm/Kbuild
From: Masahiro Yamada @ 2021-02-14 17:00 UTC (permalink / raw)
To: linux-arch, X86 ML
Cc: open list:TENSILICA XTENSA PORT (xtensa), linux-ia64,
linux-parisc, Linux Kbuild mailing list, Linux-sh list, linux-um,
Linux Kernel Mailing List, linux-mips, linux-m68k, linux-alpha,
sparclinux, linuxppc-dev, linux-arm-kernel
In-Reply-To: <20210128005110.2613902-22-masahiroy@kernel.org>
On Thu, Jan 28, 2021 at 9:52 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> These are NOT exported to userspace.
>
> The headers listed in arch/sparc/include/uapi/asm/Kbuild are exported.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Applied to linux-kbuild/fixes.
> ---
>
> arch/sparc/include/asm/Kbuild | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
> index 3688fdae50e4..aec20406145e 100644
> --- a/arch/sparc/include/asm/Kbuild
> +++ b/arch/sparc/include/asm/Kbuild
> @@ -1,6 +1,4 @@
> # SPDX-License-Identifier: GPL-2.0
> -# User exported sparc header files
> -
> generated-y += syscall_table_32.h
> generated-y += syscall_table_64.h
> generated-y += syscall_table_c32.h
> --
> 2.27.0
>
--
Best Regards
Masahiro Yamada
^ permalink raw reply
* [PATCH 1/2] arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work
From: Masahiro Yamada @ 2021-02-15 0:48 UTC (permalink / raw)
To: linux-kbuild
Cc: Rich Felker, linux-ia64, linux-sh, linux-mips,
James E.J. Bottomley, Max Filippov, Paul Mackerras,
H. Peter Anvin, sparclinux, Yoshinori Sato, Masahiro Yamada, x86,
Ingo Molnar, Geert Uytterhoeven, Matt Turner, Fenghua Yu,
linux-xtensa, linux-m68k, Tony Luck, Ivan Kokshaysky,
Andy Lutomirski, Thomas Gleixner, Richard Henderson, Chris Zankel,
Michal Simek, Thomas Bogendoerfer, linux-parisc, linux-kernel,
Helge Deller, linux-alpha, Borislav Petkov, linuxppc-dev,
David S. Miller
The rules in these Makefiles cannot detect the command line change
because the prerequisite 'FORCE' is missing.
Adding 'FORCE' will result in the headers being rebuilt every time
because the 'targets' additions are also wrong; the file paths in
'targets' must be relative to the current Makefile.
Fix all of them so the if_changed rules work correctly.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/alpha/kernel/syscalls/Makefile | 11 +++++-----
arch/ia64/kernel/syscalls/Makefile | 11 +++++-----
arch/m68k/kernel/syscalls/Makefile | 11 +++++-----
arch/microblaze/kernel/syscalls/Makefile | 11 +++++-----
arch/mips/kernel/syscalls/Makefile | 27 ++++++++++++------------
arch/parisc/kernel/syscalls/Makefile | 17 ++++++++-------
arch/powerpc/kernel/syscalls/Makefile | 19 +++++++++--------
arch/sh/kernel/syscalls/Makefile | 11 +++++-----
arch/sparc/kernel/syscalls/Makefile | 17 ++++++++-------
arch/x86/entry/syscalls/Makefile | 23 ++++++++++----------
arch/xtensa/kernel/syscalls/Makefile | 11 +++++-----
11 files changed, 90 insertions(+), 79 deletions(-)
diff --git a/arch/alpha/kernel/syscalls/Makefile b/arch/alpha/kernel/syscalls/Makefile
index 659faefdcb1d..1c42d2d2926d 100644
--- a/arch/alpha/kernel/syscalls/Makefile
+++ b/arch/alpha/kernel/syscalls/Makefile
@@ -21,18 +21,19 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_abi_$(basetarget))' \
'$(systbl_offset_$(basetarget))'
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/ia64/kernel/syscalls/Makefile b/arch/ia64/kernel/syscalls/Makefile
index 813a58cba39c..b9bfd186295f 100644
--- a/arch/ia64/kernel/syscalls/Makefile
+++ b/arch/ia64/kernel/syscalls/Makefile
@@ -22,19 +22,20 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_offset_$(basetarget))'
syshdr_offset_unistd_64 := __NR_Linux
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
systbl_offset_syscall_table := 1024
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_64.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/m68k/kernel/syscalls/Makefile b/arch/m68k/kernel/syscalls/Makefile
index 659faefdcb1d..1c42d2d2926d 100644
--- a/arch/m68k/kernel/syscalls/Makefile
+++ b/arch/m68k/kernel/syscalls/Makefile
@@ -21,18 +21,19 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_abi_$(basetarget))' \
'$(systbl_offset_$(basetarget))'
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/microblaze/kernel/syscalls/Makefile b/arch/microblaze/kernel/syscalls/Makefile
index 659faefdcb1d..1c42d2d2926d 100644
--- a/arch/microblaze/kernel/syscalls/Makefile
+++ b/arch/microblaze/kernel/syscalls/Makefile
@@ -21,18 +21,19 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_abi_$(basetarget))' \
'$(systbl_offset_$(basetarget))'
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/mips/kernel/syscalls/Makefile b/arch/mips/kernel/syscalls/Makefile
index 6efb2f6889a7..f15842bda464 100644
--- a/arch/mips/kernel/syscalls/Makefile
+++ b/arch/mips/kernel/syscalls/Makefile
@@ -31,50 +31,50 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_offset_$(basetarget))'
syshdr_offset_unistd_n32 := __NR_Linux
-$(uapi)/unistd_n32.h: $(syscalln32) $(syshdr)
+$(uapi)/unistd_n32.h: $(syscalln32) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_offset_unistd_n64 := __NR_Linux
-$(uapi)/unistd_n64.h: $(syscalln64) $(syshdr)
+$(uapi)/unistd_n64.h: $(syscalln64) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_offset_unistd_o32 := __NR_Linux
-$(uapi)/unistd_o32.h: $(syscallo32) $(syshdr)
+$(uapi)/unistd_o32.h: $(syscallo32) $(syshdr) FORCE
$(call if_changed,syshdr)
sysnr_pfx_unistd_nr_n32 := N32
sysnr_offset_unistd_nr_n32 := 6000
-$(uapi)/unistd_nr_n32.h: $(syscalln32) $(sysnr)
+$(uapi)/unistd_nr_n32.h: $(syscalln32) $(sysnr) FORCE
$(call if_changed,sysnr)
sysnr_pfx_unistd_nr_n64 := 64
sysnr_offset_unistd_nr_n64 := 5000
-$(uapi)/unistd_nr_n64.h: $(syscalln64) $(sysnr)
+$(uapi)/unistd_nr_n64.h: $(syscalln64) $(sysnr) FORCE
$(call if_changed,sysnr)
sysnr_pfx_unistd_nr_o32 := O32
sysnr_offset_unistd_nr_o32 := 4000
-$(uapi)/unistd_nr_o32.h: $(syscallo32) $(sysnr)
+$(uapi)/unistd_nr_o32.h: $(syscallo32) $(sysnr) FORCE
$(call if_changed,sysnr)
systbl_abi_syscall_table_32_o32 := 32_o32
systbl_offset_syscall_table_32_o32 := 4000
-$(kapi)/syscall_table_32_o32.h: $(syscallo32) $(systbl)
+$(kapi)/syscall_table_32_o32.h: $(syscallo32) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abi_syscall_table_64_n32 := 64_n32
systbl_offset_syscall_table_64_n32 := 6000
-$(kapi)/syscall_table_64_n32.h: $(syscalln32) $(systbl)
+$(kapi)/syscall_table_64_n32.h: $(syscalln32) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abi_syscall_table_64_n64 := 64_n64
systbl_offset_syscall_table_64_n64 := 5000
-$(kapi)/syscall_table_64_n64.h: $(syscalln64) $(systbl)
+$(kapi)/syscall_table_64_n64.h: $(syscalln64) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abi_syscall_table_64_o32 := 64_o32
systbl_offset_syscall_table_64_o32 := 4000
-$(kapi)/syscall_table_64_o32.h: $(syscallo32) $(systbl)
+$(kapi)/syscall_table_64_o32.h: $(syscallo32) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_n32.h \
@@ -88,9 +88,10 @@ kapisyshdr-y += syscall_table_32_o32.h \
syscall_table_64_n64.h \
syscall_table_64_o32.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/parisc/kernel/syscalls/Makefile b/arch/parisc/kernel/syscalls/Makefile
index c22a21c39f30..556fe30a6c8f 100644
--- a/arch/parisc/kernel/syscalls/Makefile
+++ b/arch/parisc/kernel/syscalls/Makefile
@@ -22,24 +22,24 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_offset_$(basetarget))'
syshdr_abis_unistd_32 := common,32
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abis_unistd_64 := common,64
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
systbl_abis_syscall_table_32 := common,32
-$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_64 := common,64
-$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_c32 := common,32
systbl_abi_syscall_table_c32 := c32
-$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h unistd_64.h
@@ -47,9 +47,10 @@ kapisyshdr-y += syscall_table_32.h \
syscall_table_64.h \
syscall_table_c32.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/powerpc/kernel/syscalls/Makefile b/arch/powerpc/kernel/syscalls/Makefile
index 27b48954808d..d609f0040b2a 100644
--- a/arch/powerpc/kernel/syscalls/Makefile
+++ b/arch/powerpc/kernel/syscalls/Makefile
@@ -22,31 +22,31 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_offset_$(basetarget))'
syshdr_abis_unistd_32 := common,nospu,32
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abis_unistd_64 := common,nospu,64
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
systbl_abis_syscall_table_32 := common,nospu,32
systbl_abi_syscall_table_32 := 32
-$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_64 := common,nospu,64
systbl_abi_syscall_table_64 := 64
-$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_c32 := common,nospu,32
systbl_abi_syscall_table_c32 := c32
-$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_spu := common,spu
systbl_abi_syscall_table_spu := spu
-$(kapi)/syscall_table_spu.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_spu.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h unistd_64.h
@@ -55,9 +55,10 @@ kapisyshdr-y += syscall_table_32.h \
syscall_table_c32.h \
syscall_table_spu.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/sh/kernel/syscalls/Makefile b/arch/sh/kernel/syscalls/Makefile
index 659faefdcb1d..1c42d2d2926d 100644
--- a/arch/sh/kernel/syscalls/Makefile
+++ b/arch/sh/kernel/syscalls/Makefile
@@ -21,18 +21,19 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_abi_$(basetarget))' \
'$(systbl_offset_$(basetarget))'
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/sparc/kernel/syscalls/Makefile b/arch/sparc/kernel/syscalls/Makefile
index c22a21c39f30..556fe30a6c8f 100644
--- a/arch/sparc/kernel/syscalls/Makefile
+++ b/arch/sparc/kernel/syscalls/Makefile
@@ -22,24 +22,24 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_offset_$(basetarget))'
syshdr_abis_unistd_32 := common,32
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abis_unistd_64 := common,64
-$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
systbl_abis_syscall_table_32 := common,32
-$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_64 := common,64
-$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
systbl_abis_syscall_table_c32 := common,32
systbl_abi_syscall_table_c32 := c32
-$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h unistd_64.h
@@ -47,9 +47,10 @@ kapisyshdr-y += syscall_table_32.h \
syscall_table_64.h \
syscall_table_c32.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
diff --git a/arch/x86/entry/syscalls/Makefile b/arch/x86/entry/syscalls/Makefile
index 6fb9b57ed5ba..e1c7ddb7546b 100644
--- a/arch/x86/entry/syscalls/Makefile
+++ b/arch/x86/entry/syscalls/Makefile
@@ -24,34 +24,34 @@ quiet_cmd_hypercalls = HYPERCALLS $@
cmd_hypercalls = $(CONFIG_SHELL) '$<' $@ $(filter-out $<,$^)
syshdr_abi_unistd_32 := i386
-$(uapi)/unistd_32.h: $(syscall32) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall32) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abi_unistd_32_ia32 := i386
syshdr_pfx_unistd_32_ia32 := ia32_
-$(out)/unistd_32_ia32.h: $(syscall32) $(syshdr)
+$(out)/unistd_32_ia32.h: $(syscall32) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abi_unistd_x32 := common,x32
syshdr_offset_unistd_x32 := __X32_SYSCALL_BIT
-$(uapi)/unistd_x32.h: $(syscall64) $(syshdr)
+$(uapi)/unistd_x32.h: $(syscall64) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abi_unistd_64 := common,64
-$(uapi)/unistd_64.h: $(syscall64) $(syshdr)
+$(uapi)/unistd_64.h: $(syscall64) $(syshdr) FORCE
$(call if_changed,syshdr)
syshdr_abi_unistd_64_x32 := x32
syshdr_pfx_unistd_64_x32 := x32_
-$(out)/unistd_64_x32.h: $(syscall64) $(syshdr)
+$(out)/unistd_64_x32.h: $(syscall64) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(out)/syscalls_32.h: $(syscall32) $(systbl)
+$(out)/syscalls_32.h: $(syscall32) $(systbl) FORCE
$(call if_changed,systbl)
-$(out)/syscalls_64.h: $(syscall64) $(systbl)
+$(out)/syscalls_64.h: $(syscall64) $(systbl) FORCE
$(call if_changed,systbl)
-$(out)/xen-hypercalls.h: $(srctree)/scripts/xen-hypercalls.sh
+$(out)/xen-hypercalls.h: $(srctree)/scripts/xen-hypercalls.sh FORCE
$(call if_changed,hypercalls)
$(out)/xen-hypercalls.h: $(srctree)/include/xen/interface/xen*.h
@@ -62,9 +62,10 @@ syshdr-$(CONFIG_X86_64) += unistd_32_ia32.h unistd_64_x32.h
syshdr-$(CONFIG_X86_64) += syscalls_64.h
syshdr-$(CONFIG_XEN) += xen-hypercalls.h
-targets += $(uapisyshdr-y) $(syshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+syshdr-y := $(addprefix $(out)/, $(syshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(syshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(out)/,$(syshdr-y))
+all: $(uapisyshdr-y) $(syshdr-y)
@:
diff --git a/arch/xtensa/kernel/syscalls/Makefile b/arch/xtensa/kernel/syscalls/Makefile
index 659faefdcb1d..1c42d2d2926d 100644
--- a/arch/xtensa/kernel/syscalls/Makefile
+++ b/arch/xtensa/kernel/syscalls/Makefile
@@ -21,18 +21,19 @@ quiet_cmd_systbl = SYSTBL $@
'$(systbl_abi_$(basetarget))' \
'$(systbl_offset_$(basetarget))'
-$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+$(uapi)/unistd_32.h: $(syscall) $(syshdr) FORCE
$(call if_changed,syshdr)
-$(kapi)/syscall_table.h: $(syscall) $(systbl)
+$(kapi)/syscall_table.h: $(syscall) $(systbl) FORCE
$(call if_changed,systbl)
uapisyshdr-y += unistd_32.h
kapisyshdr-y += syscall_table.h
-targets += $(uapisyshdr-y) $(kapisyshdr-y)
+uapisyshdr-y := $(addprefix $(uapi)/, $(uapisyshdr-y))
+kapisyshdr-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
+targets += $(addprefix ../../../../, $(uapisyshdr-y) $(kapisyshdr-y))
PHONY += all
-all: $(addprefix $(uapi)/,$(uapisyshdr-y))
-all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+all: $(uapisyshdr-y) $(kapisyshdr-y)
@:
--
2.27.0
^ permalink raw reply related
* [PATCH 2/2] arch: syscalls: remove $(srctree)/ prefix from syscall tables
From: Masahiro Yamada @ 2021-02-15 0:48 UTC (permalink / raw)
To: linux-kbuild
Cc: Rich Felker, linux-ia64, linux-sh, linux-mips,
James E.J. Bottomley, Max Filippov, Paul Mackerras,
H. Peter Anvin, sparclinux, Yoshinori Sato, Masahiro Yamada, x86,
Russell King, Ingo Molnar, Geert Uytterhoeven, Matt Turner,
Fenghua Yu, linux-xtensa, linux-m68k, Tony Luck, Ivan Kokshaysky,
Andy Lutomirski, Thomas Gleixner, linux-arm-kernel,
Richard Henderson, Chris Zankel, Michal Simek,
Thomas Bogendoerfer, linux-parisc, linux-kernel, Helge Deller,
linux-alpha, Borislav Petkov, linuxppc-dev, David S. Miller
In-Reply-To: <20210215004823.440102-1-masahiroy@kernel.org>
The 'syscall' variables are not directly used in the commands.
Remove the $(srctree)/ prefix because we can rely on VPATH.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
arch/alpha/kernel/syscalls/Makefile | 2 +-
arch/arm/tools/Makefile | 2 +-
arch/ia64/kernel/syscalls/Makefile | 2 +-
arch/m68k/kernel/syscalls/Makefile | 2 +-
arch/microblaze/kernel/syscalls/Makefile | 2 +-
arch/mips/kernel/syscalls/Makefile | 6 +++---
arch/parisc/kernel/syscalls/Makefile | 2 +-
arch/powerpc/kernel/syscalls/Makefile | 2 +-
arch/sh/kernel/syscalls/Makefile | 2 +-
arch/sparc/kernel/syscalls/Makefile | 2 +-
arch/x86/entry/syscalls/Makefile | 4 ++--
arch/xtensa/kernel/syscalls/Makefile | 2 +-
12 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/arch/alpha/kernel/syscalls/Makefile b/arch/alpha/kernel/syscalls/Makefile
index 1c42d2d2926d..285aaba832d9 100644
--- a/arch/alpha/kernel/syscalls/Makefile
+++ b/arch/alpha/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/arm/tools/Makefile b/arch/arm/tools/Makefile
index 27d8beb7c941..3654f979851b 100644
--- a/arch/arm/tools/Makefile
+++ b/arch/arm/tools/Makefile
@@ -11,7 +11,7 @@ uapi := $(gen)/uapi/asm
syshdr := $(srctree)/$(src)/syscallhdr.sh
sysnr := $(srctree)/$(src)/syscallnr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
gen-y := $(gen)/calls-oabi.S
gen-y += $(gen)/calls-eabi.S
diff --git a/arch/ia64/kernel/syscalls/Makefile b/arch/ia64/kernel/syscalls/Makefile
index b9bfd186295f..bf4bda0f63eb 100644
--- a/arch/ia64/kernel/syscalls/Makefile
+++ b/arch/ia64/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/m68k/kernel/syscalls/Makefile b/arch/m68k/kernel/syscalls/Makefile
index 1c42d2d2926d..285aaba832d9 100644
--- a/arch/m68k/kernel/syscalls/Makefile
+++ b/arch/m68k/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/microblaze/kernel/syscalls/Makefile b/arch/microblaze/kernel/syscalls/Makefile
index 1c42d2d2926d..285aaba832d9 100644
--- a/arch/microblaze/kernel/syscalls/Makefile
+++ b/arch/microblaze/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/mips/kernel/syscalls/Makefile b/arch/mips/kernel/syscalls/Makefile
index f15842bda464..ed22b711ccb7 100644
--- a/arch/mips/kernel/syscalls/Makefile
+++ b/arch/mips/kernel/syscalls/Makefile
@@ -5,9 +5,9 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscalln32 := $(srctree)/$(src)/syscall_n32.tbl
-syscalln64 := $(srctree)/$(src)/syscall_n64.tbl
-syscallo32 := $(srctree)/$(src)/syscall_o32.tbl
+syscalln32 := $(src)/syscall_n32.tbl
+syscalln64 := $(src)/syscall_n64.tbl
+syscallo32 := $(src)/syscall_o32.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
sysnr := $(srctree)/$(src)/syscallnr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/parisc/kernel/syscalls/Makefile b/arch/parisc/kernel/syscalls/Makefile
index 556fe30a6c8f..283f64407b07 100644
--- a/arch/parisc/kernel/syscalls/Makefile
+++ b/arch/parisc/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/powerpc/kernel/syscalls/Makefile b/arch/powerpc/kernel/syscalls/Makefile
index d609f0040b2a..9e3be295dbba 100644
--- a/arch/powerpc/kernel/syscalls/Makefile
+++ b/arch/powerpc/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/sh/kernel/syscalls/Makefile b/arch/sh/kernel/syscalls/Makefile
index 1c42d2d2926d..285aaba832d9 100644
--- a/arch/sh/kernel/syscalls/Makefile
+++ b/arch/sh/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/sparc/kernel/syscalls/Makefile b/arch/sparc/kernel/syscalls/Makefile
index 556fe30a6c8f..283f64407b07 100644
--- a/arch/sparc/kernel/syscalls/Makefile
+++ b/arch/sparc/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/x86/entry/syscalls/Makefile b/arch/x86/entry/syscalls/Makefile
index e1c7ddb7546b..cf388e9e8989 100644
--- a/arch/x86/entry/syscalls/Makefile
+++ b/arch/x86/entry/syscalls/Makefile
@@ -6,8 +6,8 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') \
$(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)')
-syscall32 := $(srctree)/$(src)/syscall_32.tbl
-syscall64 := $(srctree)/$(src)/syscall_64.tbl
+syscall32 := $(src)/syscall_32.tbl
+syscall64 := $(src)/syscall_64.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
diff --git a/arch/xtensa/kernel/syscalls/Makefile b/arch/xtensa/kernel/syscalls/Makefile
index 1c42d2d2926d..285aaba832d9 100644
--- a/arch/xtensa/kernel/syscalls/Makefile
+++ b/arch/xtensa/kernel/syscalls/Makefile
@@ -5,7 +5,7 @@ uapi := arch/$(SRCARCH)/include/generated/uapi/asm
_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)') \
$(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
-syscall := $(srctree)/$(src)/syscall.tbl
+syscall := $(src)/syscall.tbl
syshdr := $(srctree)/$(src)/syscallhdr.sh
systbl := $(srctree)/$(src)/syscalltbl.sh
--
2.27.0
^ permalink raw reply related
* [PATCH v4 3/3] KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM
From: Bharata B Rao @ 2021-02-15 6:35 UTC (permalink / raw)
To: kvm-ppc, linuxppc-dev
Cc: farosas, aneesh.kumar, npiggin, Bharata B Rao, david
In-Reply-To: <20210215063542.3642366-1-bharata@linux.ibm.com>
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
---
arch/powerpc/kvm/book3s_64_mmu_radix.c | 27 +++++++++++++++++++++-----
arch/powerpc/kvm/book3s_hv_nested.c | 12 ++++++++++--
2 files changed, 32 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index bb35490400e9..7ea5459022cb 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -21,6 +21,7 @@
#include <asm/pte-walk.h>
#include <asm/ultravisor.h>
#include <asm/kvm_book3s_uvmem.h>
+#include <asm/plpar_wrappers.h>
/*
* Supported radix tree geometry.
@@ -318,9 +319,19 @@ void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr,
}
psi = shift_to_mmu_psize(pshift);
- rb = addr | (mmu_get_ap(psi) << PPC_BITLSHIFT(58));
- rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(0, 0, 1),
- lpid, rb);
+
+ if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE)) {
+ rb = addr | (mmu_get_ap(psi) << PPC_BITLSHIFT(58));
+ rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(0, 0, 1),
+ lpid, rb);
+ } else {
+ rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+ H_RPTI_TYPE_NESTED |
+ H_RPTI_TYPE_TLB,
+ psize_to_rpti_pgsize(psi),
+ addr, addr + psize);
+ }
+
if (rc)
pr_err("KVM: TLB page invalidation hcall failed, rc=%ld\n", rc);
}
@@ -334,8 +345,14 @@ static void kvmppc_radix_flush_pwc(struct kvm *kvm, unsigned int lpid)
return;
}
- rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(1, 0, 1),
- lpid, TLBIEL_INVAL_SET_LPID);
+ if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE))
+ rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(1, 0, 1),
+ lpid, TLBIEL_INVAL_SET_LPID);
+ else
+ rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+ H_RPTI_TYPE_NESTED |
+ H_RPTI_TYPE_PWC, H_RPTI_PAGE_ALL,
+ 0, -1UL);
if (rc)
pr_err("KVM: TLB PWC invalidation hcall failed, rc=%ld\n", rc);
}
diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c
index 40ed4eb80adb..0ebddb615684 100644
--- a/arch/powerpc/kvm/book3s_hv_nested.c
+++ b/arch/powerpc/kvm/book3s_hv_nested.c
@@ -19,6 +19,7 @@
#include <asm/pgalloc.h>
#include <asm/pte-walk.h>
#include <asm/reg.h>
+#include <asm/plpar_wrappers.h>
static struct patb_entry *pseries_partition_tb;
@@ -402,8 +403,15 @@ static void kvmhv_flush_lpid(unsigned int lpid)
return;
}
- rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(2, 0, 1),
- lpid, TLBIEL_INVAL_SET_LPID);
+ if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE))
+ rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(2, 0, 1),
+ lpid, TLBIEL_INVAL_SET_LPID);
+ else
+ rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+ H_RPTI_TYPE_NESTED |
+ H_RPTI_TYPE_TLB | H_RPTI_TYPE_PWC |
+ H_RPTI_TYPE_PAT,
+ H_RPTI_PAGE_ALL, 0, -1UL);
if (rc)
pr_err("KVM: TLB LPID invalidation hcall failed, rc=%ld\n", rc);
}
--
2.26.2
^ permalink raw reply related
* [PATCH v4 0/3] Support for H_RPT_INVALIDATE in PowerPC KVM
From: Bharata B Rao @ 2021-02-15 6:35 UTC (permalink / raw)
To: kvm-ppc, linuxppc-dev
Cc: farosas, aneesh.kumar, npiggin, Bharata B Rao, david
This patchset adds support for the new hcall H_RPT_INVALIDATE
and replaces the nested tlb flush calls with this new hcall
if support for the same exists.
Changes in v4:
-------------
- While reusing the tlb flush routines from radix_tlb.c in v3,
setting of LPID got missed out. Take care of this by
introducing new flush routines that set both PID and LPID
when using tlbie instruction. This is required for
process-scoped invalidations from guests (both L1 and
nested guests). Added a new patch 1/3 for this.
- Added code to handle H_RPT_INVALIDATE hcall issued
by nested guest in L0 nested guest exit path.
v3: https://lore.kernel.org/linuxppc-dev/20210105090557.2150104-1-bharata@linux.ibm.com/T/#t
Bharata B Rao (3):
powerpc/book3s64/radix/tlb: tlbie primitives for process-scoped
invalidations from guests
KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM
Documentation/virt/kvm/api.rst | 17 ++
.../include/asm/book3s/64/tlbflush-radix.h | 18 +++
arch/powerpc/include/asm/kvm_book3s.h | 3 +
arch/powerpc/include/asm/mmu_context.h | 11 ++
arch/powerpc/kvm/book3s_64_mmu_radix.c | 27 +++-
arch/powerpc/kvm/book3s_hv.c | 91 +++++++++++
arch/powerpc/kvm/book3s_hv_nested.c | 108 ++++++++++++-
arch/powerpc/kvm/powerpc.c | 3 +
arch/powerpc/mm/book3s64/radix_tlb.c | 147 +++++++++++++++++-
include/uapi/linux/kvm.h | 1 +
10 files changed, 415 insertions(+), 11 deletions(-)
--
2.26.2
^ permalink raw reply
* [PATCH v4 1/3] powerpc/book3s64/radix/tlb: tlbie primitives for process-scoped invalidations from guests
From: Bharata B Rao @ 2021-02-15 6:35 UTC (permalink / raw)
To: kvm-ppc, linuxppc-dev
Cc: farosas, aneesh.kumar, npiggin, Bharata B Rao, david
In-Reply-To: <20210215063542.3642366-1-bharata@linux.ibm.com>
H_RPT_INVALIDATE hcall needs to perform process scoped tlbie
invalidations of L1 and nested guests from L0. This needs RS register
for TLBIE instruction to contain both PID and LPID. Introduce
primitives that execute tlbie instruction with both PID
and LPID set in prepartion for H_RPT_INVALIDATE hcall.
While we are here, move RIC_FLUSH definitions to header file
and introduce helper rpti_pgsize_to_psize() that will be needed
by the upcoming hcall.
Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
---
.../include/asm/book3s/64/tlbflush-radix.h | 18 +++
arch/powerpc/mm/book3s64/radix_tlb.c | 122 +++++++++++++++++-
2 files changed, 136 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
index 94439e0cefc9..aace7e9b2397 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
@@ -4,6 +4,10 @@
#include <asm/hvcall.h>
+#define RIC_FLUSH_TLB 0
+#define RIC_FLUSH_PWC 1
+#define RIC_FLUSH_ALL 2
+
struct vm_area_struct;
struct mm_struct;
struct mmu_gather;
@@ -21,6 +25,20 @@ static inline u64 psize_to_rpti_pgsize(unsigned long psize)
return H_RPTI_PAGE_ALL;
}
+static inline int rpti_pgsize_to_psize(unsigned long page_size)
+{
+ if (page_size == H_RPTI_PAGE_4K)
+ return MMU_PAGE_4K;
+ if (page_size == H_RPTI_PAGE_64K)
+ return MMU_PAGE_64K;
+ if (page_size == H_RPTI_PAGE_2M)
+ return MMU_PAGE_2M;
+ if (page_size == H_RPTI_PAGE_1G)
+ return MMU_PAGE_1G;
+ else
+ return MMU_PAGE_64K; /* Default */
+}
+
static inline int mmu_get_ap(int psize)
{
return mmu_psize_defs[psize].ap;
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c
index fb66d154b26c..097402435303 100644
--- a/arch/powerpc/mm/book3s64/radix_tlb.c
+++ b/arch/powerpc/mm/book3s64/radix_tlb.c
@@ -18,10 +18,6 @@
#include <asm/cputhreads.h>
#include <asm/plpar_wrappers.h>
-#define RIC_FLUSH_TLB 0
-#define RIC_FLUSH_PWC 1
-#define RIC_FLUSH_ALL 2
-
/*
* tlbiel instruction for radix, set invalidation
* i.e., r=1 and is=01 or is=10 or is=11
@@ -128,6 +124,21 @@ static __always_inline void __tlbie_pid(unsigned long pid, unsigned long ric)
trace_tlbie(0, 0, rb, rs, ric, prs, r);
}
+static __always_inline void __tlbie_pid_lpid(unsigned long pid,
+ unsigned long lpid,
+ unsigned long ric)
+{
+ unsigned long rb, rs, prs, r;
+
+ rb = PPC_BIT(53); /* IS = 1 */
+ rs = (pid << PPC_BITLSHIFT(31)) | (lpid & ~(PPC_BITMASK(0, 31)));
+ prs = 1; /* process scoped */
+ r = 1; /* radix format */
+
+ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ trace_tlbie(0, 0, rb, rs, ric, prs, r);
+}
static __always_inline void __tlbie_lpid(unsigned long lpid, unsigned long ric)
{
unsigned long rb,rs,prs,r;
@@ -188,6 +199,23 @@ static __always_inline void __tlbie_va(unsigned long va, unsigned long pid,
trace_tlbie(0, 0, rb, rs, ric, prs, r);
}
+static __always_inline void __tlbie_va_lpid(unsigned long va, unsigned long pid,
+ unsigned long lpid,
+ unsigned long ap, unsigned long ric)
+{
+ unsigned long rb, rs, prs, r;
+
+ rb = va & ~(PPC_BITMASK(52, 63));
+ rb |= ap << PPC_BITLSHIFT(58);
+ rs = (pid << PPC_BITLSHIFT(31)) | (lpid & ~(PPC_BITMASK(0, 31)));
+ prs = 1; /* process scoped */
+ r = 1; /* radix format */
+
+ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1)
+ : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
+ trace_tlbie(0, 0, rb, rs, ric, prs, r);
+}
+
static __always_inline void __tlbie_lpid_va(unsigned long va, unsigned long lpid,
unsigned long ap, unsigned long ric)
{
@@ -233,6 +261,22 @@ static inline void fixup_tlbie_va_range(unsigned long va, unsigned long pid,
}
}
+static inline void fixup_tlbie_va_range_lpid(unsigned long va,
+ unsigned long pid,
+ unsigned long lpid,
+ unsigned long ap)
+{
+ if (cpu_has_feature(CPU_FTR_P9_TLBIE_ERAT_BUG)) {
+ asm volatile("ptesync" : : : "memory");
+ __tlbie_pid_lpid(0, lpid, RIC_FLUSH_TLB);
+ }
+
+ if (cpu_has_feature(CPU_FTR_P9_TLBIE_STQ_BUG)) {
+ asm volatile("ptesync" : : : "memory");
+ __tlbie_va_lpid(va, pid, lpid, ap, RIC_FLUSH_TLB);
+ }
+}
+
static inline void fixup_tlbie_pid(unsigned long pid)
{
/*
@@ -252,6 +296,25 @@ static inline void fixup_tlbie_pid(unsigned long pid)
}
}
+static inline void fixup_tlbie_pid_lpid(unsigned long pid, unsigned long lpid)
+{
+ /*
+ * We can use any address for the invalidation, pick one which is
+ * probably unused as an optimisation.
+ */
+ unsigned long va = ((1UL << 52) - 1);
+
+ if (cpu_has_feature(CPU_FTR_P9_TLBIE_ERAT_BUG)) {
+ asm volatile("ptesync" : : : "memory");
+ __tlbie_pid_lpid(0, lpid, RIC_FLUSH_TLB);
+ }
+
+ if (cpu_has_feature(CPU_FTR_P9_TLBIE_STQ_BUG)) {
+ asm volatile("ptesync" : : : "memory");
+ __tlbie_va_lpid(va, pid, lpid, mmu_get_ap(MMU_PAGE_64K),
+ RIC_FLUSH_TLB);
+ }
+}
static inline void fixup_tlbie_lpid_va(unsigned long va, unsigned long lpid,
unsigned long ap)
@@ -342,6 +405,31 @@ static inline void _tlbie_pid(unsigned long pid, unsigned long ric)
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
+static inline void _tlbie_pid_lpid(unsigned long pid, unsigned long lpid,
+ unsigned long ric)
+{
+ asm volatile("ptesync" : : : "memory");
+
+ /*
+ * Workaround the fact that the "ric" argument to __tlbie_pid
+ * must be a compile-time contraint to match the "i" constraint
+ * in the asm statement.
+ */
+ switch (ric) {
+ case RIC_FLUSH_TLB:
+ __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_TLB);
+ fixup_tlbie_pid_lpid(pid, lpid);
+ break;
+ case RIC_FLUSH_PWC:
+ __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_PWC);
+ break;
+ case RIC_FLUSH_ALL:
+ default:
+ __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_ALL);
+ fixup_tlbie_pid_lpid(pid, lpid);
+ }
+ asm volatile("eieio; tlbsync; ptesync" : : : "memory");
+}
struct tlbiel_pid {
unsigned long pid;
unsigned long ric;
@@ -467,6 +555,20 @@ static inline void __tlbie_va_range(unsigned long start, unsigned long end,
fixup_tlbie_va_range(addr - page_size, pid, ap);
}
+static inline void __tlbie_va_range_lpid(unsigned long start, unsigned long end,
+ unsigned long pid, unsigned long lpid,
+ unsigned long page_size,
+ unsigned long psize)
+{
+ unsigned long addr;
+ unsigned long ap = mmu_get_ap(psize);
+
+ for (addr = start; addr < end; addr += page_size)
+ __tlbie_va_lpid(addr, pid, lpid, ap, RIC_FLUSH_TLB);
+
+ fixup_tlbie_va_range_lpid(addr - page_size, pid, lpid, ap);
+}
+
static __always_inline void _tlbie_va(unsigned long va, unsigned long pid,
unsigned long psize, unsigned long ric)
{
@@ -547,6 +649,18 @@ static inline void _tlbie_va_range(unsigned long start, unsigned long end,
asm volatile("eieio; tlbsync; ptesync": : :"memory");
}
+static inline void _tlbie_va_range_lpid(unsigned long start, unsigned long end,
+ unsigned long pid, unsigned long lpid,
+ unsigned long page_size,
+ unsigned long psize, bool also_pwc)
+{
+ asm volatile("ptesync" : : : "memory");
+ if (also_pwc)
+ __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_PWC);
+ __tlbie_va_range_lpid(start, end, pid, lpid, page_size, psize);
+ asm volatile("eieio; tlbsync; ptesync" : : : "memory");
+}
+
static inline void _tlbiel_va_range_multicast(struct mm_struct *mm,
unsigned long start, unsigned long end,
unsigned long pid, unsigned long page_size,
--
2.26.2
^ permalink raw reply related
* [PATCH v4 2/3] KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
From: Bharata B Rao @ 2021-02-15 6:35 UTC (permalink / raw)
To: kvm-ppc, linuxppc-dev
Cc: farosas, aneesh.kumar, npiggin, Bharata B Rao, david
In-Reply-To: <20210215063542.3642366-1-bharata@linux.ibm.com>
Implement H_RPT_INVALIDATE hcall and add KVM capability
KVM_CAP_PPC_RPT_INVALIDATE to indicate the support for the same.
This hcall does two types of TLB invalidations:
1. Process-scoped invalidations for guests with LPCR[GTSE]=0.
This is currently not used in KVM as GTSE is not usually
disabled in KVM.
2. Partition-scoped invalidations that an L1 hypervisor does on
behalf of an L2 guest. This replaces the uses of the existing
hcall H_TLB_INVALIDATE.
In order to handle process scoped invalidations of L2, we
intercept the nested exit handling code in L0 only to handle
H_TLB_INVALIDATE hcall.
Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
---
Documentation/virt/kvm/api.rst | 17 +++++
arch/powerpc/include/asm/kvm_book3s.h | 3 +
arch/powerpc/include/asm/mmu_context.h | 11 +++
arch/powerpc/kvm/book3s_hv.c | 91 ++++++++++++++++++++++++
arch/powerpc/kvm/book3s_hv_nested.c | 96 ++++++++++++++++++++++++++
arch/powerpc/kvm/powerpc.c | 3 +
arch/powerpc/mm/book3s64/radix_tlb.c | 25 +++++++
include/uapi/linux/kvm.h | 1 +
8 files changed, 247 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 99ceb978c8b0..416c36aa35d4 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -6038,6 +6038,23 @@ KVM_EXIT_X86_RDMSR and KVM_EXIT_X86_WRMSR exit notifications which user space
can then handle to implement model specific MSR handling and/or user notifications
to inform a user that an MSR was not handled.
+7.22 KVM_CAP_PPC_RPT_INVALIDATE
+------------------------------
+
+:Capability: KVM_CAP_PPC_RPT_INVALIDATE
+:Architectures: ppc
+:Type: vm
+
+This capability indicates that the kernel is capable of handling
+H_RPT_INVALIDATE hcall.
+
+In order to enable the use of H_RPT_INVALIDATE in the guest,
+user space might have to advertise it for the guest. For example,
+IBM pSeries (sPAPR) guest starts using it if "hcall-rpt-invalidate" is
+present in the "ibm,hypertas-functions" device-tree property.
+
+This capability is always enabled.
+
8. Other capabilities.
======================
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index d32ec9ae73bd..0f1c5fa6e8ce 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -298,6 +298,9 @@ void kvmhv_set_ptbl_entry(unsigned int lpid, u64 dw0, u64 dw1);
void kvmhv_release_all_nested(struct kvm *kvm);
long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu);
long kvmhv_do_nested_tlbie(struct kvm_vcpu *vcpu);
+long kvmhv_h_rpti_nested(struct kvm_vcpu *vcpu, unsigned long lpid,
+ unsigned long type, unsigned long pg_sizes,
+ unsigned long start, unsigned long end);
int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu,
u64 time_limit, unsigned long lpcr);
void kvmhv_save_hv_regs(struct kvm_vcpu *vcpu, struct hv_guest_state *hr);
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index d5821834dba9..fbf3b5b45fe9 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -124,8 +124,19 @@ static inline bool need_extra_context(struct mm_struct *mm, unsigned long ea)
#if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) && defined(CONFIG_PPC_RADIX_MMU)
extern void radix_kvm_prefetch_workaround(struct mm_struct *mm);
+void do_h_rpt_invalidate(unsigned long pid, unsigned long lpid,
+ unsigned long type, unsigned long page_size,
+ unsigned long psize, unsigned long start,
+ unsigned long end);
#else
static inline void radix_kvm_prefetch_workaround(struct mm_struct *mm) { }
+static inline void do_h_rpt_invalidate(unsigned long pid,
+ unsigned long lpid,
+ unsigned long type,
+ unsigned long page_size,
+ unsigned long psize,
+ unsigned long start,
+ unsigned long end) { }
#endif
extern void switch_cop(struct mm_struct *next);
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 6f612d240392..802cb77c39cc 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -904,6 +904,64 @@ static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
return yield_count;
}
+static void do_h_rpt_invalidate_prs(unsigned long pid, unsigned long lpid,
+ unsigned long type, unsigned long pg_sizes,
+ unsigned long start, unsigned long end)
+{
+ unsigned long psize;
+
+ if (pg_sizes & H_RPTI_PAGE_64K) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_64K);
+ do_h_rpt_invalidate(pid, lpid, type, (1UL << 16), psize,
+ start, end);
+ }
+
+ if (pg_sizes & H_RPTI_PAGE_2M) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_2M);
+ do_h_rpt_invalidate(pid, lpid, type, (1UL << 21), psize,
+ start, end);
+ }
+
+ if (pg_sizes & H_RPTI_PAGE_1G) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_1G);
+ do_h_rpt_invalidate(pid, lpid, type, (1UL << 30), psize,
+ start, end);
+ }
+
+}
+
+static long kvmppc_h_rpt_invalidate(struct kvm_vcpu *vcpu,
+ unsigned long pid, unsigned long target,
+ unsigned long type, unsigned long pg_sizes,
+ unsigned long start, unsigned long end)
+{
+ if (!kvm_is_radix(vcpu->kvm))
+ return H_UNSUPPORTED;
+
+ if (kvmhv_on_pseries())
+ return H_UNSUPPORTED;
+
+ if (end < start)
+ return H_P5;
+
+ if (type & H_RPTI_TYPE_NESTED) {
+ if (!nesting_enabled(vcpu->kvm))
+ return H_FUNCTION;
+
+ /* Support only cores as target */
+ if (target != H_RPTI_TARGET_CMMU)
+ return H_P2;
+
+ return kvmhv_h_rpti_nested(vcpu, pid,
+ (type & ~H_RPTI_TYPE_NESTED),
+ pg_sizes, start, end);
+ }
+
+ do_h_rpt_invalidate_prs(pid, vcpu->kvm->arch.lpid, type, pg_sizes,
+ start, end);
+ return H_SUCCESS;
+}
+
int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
{
unsigned long req = kvmppc_get_gpr(vcpu, 3);
@@ -1112,6 +1170,14 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
*/
ret = kvmppc_h_svm_init_abort(vcpu->kvm);
break;
+ case H_RPT_INVALIDATE:
+ ret = kvmppc_h_rpt_invalidate(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6),
+ kvmppc_get_gpr(vcpu, 7),
+ kvmppc_get_gpr(vcpu, 8),
+ kvmppc_get_gpr(vcpu, 9));
+ break;
default:
return RESUME_HOST;
@@ -1158,6 +1224,7 @@ static int kvmppc_hcall_impl_hv(unsigned long cmd)
case H_XIRR_X:
#endif
case H_PAGE_INIT:
+ case H_RPT_INVALIDATE:
return 1;
}
@@ -1573,6 +1640,30 @@ static int kvmppc_handle_nested_exit(struct kvm_vcpu *vcpu)
if (!xics_on_xive())
kvmppc_xics_rm_complete(vcpu, 0);
break;
+ case BOOK3S_INTERRUPT_SYSCALL:
+ {
+ unsigned long req = kvmppc_get_gpr(vcpu, 3);
+
+ if (req != H_RPT_INVALIDATE) {
+ r = RESUME_HOST;
+ break;
+ }
+
+ /*
+ * The H_RPT_INVALIDATE hcalls issued by nested
+ * guest for process scoped invalidations when
+ * GTSE=0 are handled here.
+ */
+ do_h_rpt_invalidate_prs(kvmppc_get_gpr(vcpu, 4),
+ vcpu->arch.nested->shadow_lpid,
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6),
+ kvmppc_get_gpr(vcpu, 7),
+ kvmppc_get_gpr(vcpu, 8));
+ kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
+ r = RESUME_GUEST;
+ break;
+ }
default:
r = RESUME_HOST;
break;
diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c
index 33b58549a9aa..40ed4eb80adb 100644
--- a/arch/powerpc/kvm/book3s_hv_nested.c
+++ b/arch/powerpc/kvm/book3s_hv_nested.c
@@ -1149,6 +1149,102 @@ long kvmhv_do_nested_tlbie(struct kvm_vcpu *vcpu)
return H_SUCCESS;
}
+static long do_tlb_invalidate_nested_tlb(struct kvm_vcpu *vcpu,
+ unsigned long lpid,
+ unsigned long page_size,
+ unsigned long ap,
+ unsigned long start,
+ unsigned long end)
+{
+ unsigned long addr = start;
+ int ret;
+
+ do {
+ ret = kvmhv_emulate_tlbie_tlb_addr(vcpu, lpid, ap,
+ get_epn(addr));
+ if (ret)
+ return ret;
+ addr += page_size;
+ } while (addr < end);
+
+ return ret;
+}
+
+static long do_tlb_invalidate_nested_all(struct kvm_vcpu *vcpu,
+ unsigned long lpid)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_nested_guest *gp;
+
+ gp = kvmhv_get_nested(kvm, lpid, false);
+ if (gp) {
+ kvmhv_emulate_tlbie_lpid(vcpu, gp, RIC_FLUSH_ALL);
+ kvmhv_put_nested(gp);
+ }
+ return H_SUCCESS;
+}
+
+long kvmhv_h_rpti_nested(struct kvm_vcpu *vcpu, unsigned long lpid,
+ unsigned long type, unsigned long pg_sizes,
+ unsigned long start, unsigned long end)
+{
+ struct kvm_nested_guest *gp;
+ long ret;
+ unsigned long psize, ap;
+
+ /*
+ * If L2 lpid isn't valid, we need to return H_PARAMETER.
+ *
+ * However, nested KVM issues a L2 lpid flush call when creating
+ * partition table entries for L2. This happens even before the
+ * corresponding shadow lpid is created in HV which happens in
+ * H_ENTER_NESTED call. Since we can't differentiate this case from
+ * the invalid case, we ignore such flush requests and return success.
+ */
+ gp = kvmhv_find_nested(vcpu->kvm, lpid);
+ if (!gp)
+ return H_SUCCESS;
+
+ if ((type & H_RPTI_TYPE_NESTED_ALL) == H_RPTI_TYPE_NESTED_ALL)
+ return do_tlb_invalidate_nested_all(vcpu, lpid);
+
+ if ((type & H_RPTI_TYPE_TLB) == H_RPTI_TYPE_TLB) {
+ if (pg_sizes & H_RPTI_PAGE_64K) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_64K);
+ ap = mmu_get_ap(psize);
+
+ ret = do_tlb_invalidate_nested_tlb(vcpu, lpid,
+ (1UL << 16),
+ ap, start, end);
+ if (ret)
+ return H_P4;
+ }
+
+ if (pg_sizes & H_RPTI_PAGE_2M) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_2M);
+ ap = mmu_get_ap(psize);
+
+ ret = do_tlb_invalidate_nested_tlb(vcpu, lpid,
+ (1UL << 21),
+ ap, start, end);
+ if (ret)
+ return H_P4;
+ }
+
+ if (pg_sizes & H_RPTI_PAGE_1G) {
+ psize = rpti_pgsize_to_psize(pg_sizes & H_RPTI_PAGE_1G);
+ ap = mmu_get_ap(psize);
+
+ ret = do_tlb_invalidate_nested_tlb(vcpu, lpid,
+ (1UL << 30),
+ ap, start, end);
+ if (ret)
+ return H_P4;
+ }
+ }
+ return H_SUCCESS;
+}
+
/* Used to convert a nested guest real address to a L1 guest real address */
static int kvmhv_translate_addr_nested(struct kvm_vcpu *vcpu,
struct kvm_nested_guest *gp,
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index cf52d26f49cd..5388cd4a206a 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -678,6 +678,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = hv_enabled && kvmppc_hv_ops->enable_svm &&
!kvmppc_hv_ops->enable_svm(NULL);
break;
+ case KVM_CAP_PPC_RPT_INVALIDATE:
+ r = 1;
+ break;
#endif
default:
r = 0;
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c
index 097402435303..4f746d34b420 100644
--- a/arch/powerpc/mm/book3s64/radix_tlb.c
+++ b/arch/powerpc/mm/book3s64/radix_tlb.c
@@ -1400,4 +1400,29 @@ extern void radix_kvm_prefetch_workaround(struct mm_struct *mm)
}
}
EXPORT_SYMBOL_GPL(radix_kvm_prefetch_workaround);
+
+/*
+ * Process-scoped invalidations for a given LPID.
+ */
+void do_h_rpt_invalidate(unsigned long pid, unsigned long lpid,
+ unsigned long type, unsigned long page_size,
+ unsigned long psize, unsigned long start,
+ unsigned long end)
+{
+ if ((type & H_RPTI_TYPE_ALL) == H_RPTI_TYPE_ALL) {
+ _tlbie_pid_lpid(pid, lpid, RIC_FLUSH_ALL);
+ return;
+ }
+
+ if (type & H_RPTI_TYPE_PWC)
+ _tlbie_pid_lpid(pid, lpid, RIC_FLUSH_PWC);
+
+ if (!start && end == -1) /* PID */
+ _tlbie_pid_lpid(pid, lpid, RIC_FLUSH_TLB);
+ else /* EA */
+ _tlbie_va_range_lpid(start, end, pid, lpid, page_size,
+ psize, false);
+}
+EXPORT_SYMBOL_GPL(do_h_rpt_invalidate);
+
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 374c67875cdb..6fd530fae452 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1058,6 +1058,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_ENFORCE_PV_FEATURE_CPUID 190
#define KVM_CAP_SYS_HYPERV_CPUID 191
#define KVM_CAP_DIRTY_LOG_RING 192
+#define KVM_CAP_PPC_RPT_INVALIDATE 193
#ifdef KVM_CAP_IRQ_ROUTING
--
2.26.2
^ permalink raw reply related
* [PATCH v2] powerpc/pseries: Don't enforce MSI affinity with kdump
From: Greg Kurz @ 2021-02-15 9:45 UTC (permalink / raw)
To: Michael Ellerman
Cc: lvivier, Greg Kurz, stable, linux-kernel, Cédric Le Goater,
linuxppc-dev
Depending on the number of online CPUs in the original kernel, it is
likely for CPU #0 to be offline in a kdump kernel. The associated IRQs
in the affinity mappings provided by irq_create_affinity_masks() are
thus not started by irq_startup(), as per-design with managed IRQs.
This can be a problem with multi-queue block devices driven by blk-mq :
such a non-started IRQ is very likely paired with the single queue
enforced by blk-mq during kdump (see blk_mq_alloc_tag_set()). This
causes the device to remain silent and likely hangs the guest at
some point.
This is a regression caused by commit 9ea69a55b3b9 ("powerpc/pseries:
Pass MSI affinity to irq_create_mapping()"). Note that this only happens
with the XIVE interrupt controller because XICS has a workaround to bypass
affinity, which is activated during kdump with the "noirqdistrib" kernel
parameter.
The issue comes from a combination of factors:
- discrepancy between the number of queues detected by the multi-queue
block driver, that was used to create the MSI vectors, and the single
queue mode enforced later on by blk-mq because of kdump (i.e. keeping
all queues fixes the issue)
- CPU#0 offline (i.e. kdump always succeed with CPU#0)
Given that I couldn't reproduce on x86, which seems to always have CPU#0
online even during kdump, I'm not sure where this should be fixed. Hence
going for another approach : fine-grained affinity is for performance
and we don't really care about that during kdump. Simply revert to the
previous working behavior of ignoring affinity masks in this case only.
Fixes: 9ea69a55b3b9 ("powerpc/pseries: Pass MSI affinity to irq_create_mapping()")
Cc: lvivier@redhat.com
Cc: stable@vger.kernel.org
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
---
v2: - added missing #include <linux/crash_dump.h>
arch/powerpc/platforms/pseries/msi.c | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index b3ac2455faad..637300330507 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -4,6 +4,7 @@
* Copyright 2006-2007 Michael Ellerman, IBM Corp.
*/
+#include <linux/crash_dump.h>
#include <linux/device.h>
#include <linux/irq.h>
#include <linux/msi.h>
@@ -458,8 +459,28 @@ static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)
return hwirq;
}
- virq = irq_create_mapping_affinity(NULL, hwirq,
- entry->affinity);
+ /*
+ * Depending on the number of online CPUs in the original
+ * kernel, it is likely for CPU #0 to be offline in a kdump
+ * kernel. The associated IRQs in the affinity mappings
+ * provided by irq_create_affinity_masks() are thus not
+ * started by irq_startup(), as per-design for managed IRQs.
+ * This can be a problem with multi-queue block devices driven
+ * by blk-mq : such a non-started IRQ is very likely paired
+ * with the single queue enforced by blk-mq during kdump (see
+ * blk_mq_alloc_tag_set()). This causes the device to remain
+ * silent and likely hangs the guest at some point.
+ *
+ * We don't really care for fine-grained affinity when doing
+ * kdump actually : simply ignore the pre-computed affinity
+ * masks in this case and let the default mask with all CPUs
+ * be used when creating the IRQ mappings.
+ */
+ if (is_kdump_kernel())
+ virq = irq_create_mapping(NULL, hwirq);
+ else
+ virq = irq_create_mapping_affinity(NULL, hwirq,
+ entry->affinity);
if (!virq) {
pr_debug("rtas_msi: Failed mapping hwirq %d\n", hwirq);
--
2.26.2
^ permalink raw reply related
* Re: [PATCH 00/27] arch: syscalls: unifiy all syscalltbl.sh into scripts/syscalltbl.sh
From: Masahiro Yamada @ 2021-02-15 12:03 UTC (permalink / raw)
To: linux-arch, X86 ML
Cc: open list:TENSILICA XTENSA PORT (xtensa), linux-ia64,
linux-parisc, Linux Kbuild mailing list, Linux-sh list, linux-um,
Linux Kernel Mailing List, linux-mips, linux-m68k, linux-alpha,
sparclinux, linuxppc-dev, linux-arm-kernel
In-Reply-To: <20210128005110.2613902-1-masahiroy@kernel.org>
On Thu, Jan 28, 2021 at 9:51 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
>
> As of v5.11-rc1, 12 architectures duplicate similar shell scripts:
>
> $ find arch -name syscalltbl.sh | sort
> arch/alpha/kernel/syscalls/syscalltbl.sh
> arch/arm/tools/syscalltbl.sh
> arch/ia64/kernel/syscalls/syscalltbl.sh
> arch/m68k/kernel/syscalls/syscalltbl.sh
> arch/microblaze/kernel/syscalls/syscalltbl.sh
> arch/mips/kernel/syscalls/syscalltbl.sh
> arch/parisc/kernel/syscalls/syscalltbl.sh
> arch/powerpc/kernel/syscalls/syscalltbl.sh
> arch/sh/kernel/syscalls/syscalltbl.sh
> arch/sparc/kernel/syscalls/syscalltbl.sh
> arch/x86/entry/syscalls/syscalltbl.sh
> arch/xtensa/kernel/syscalls/syscalltbl.sh
>
> This patch set unifies all of them into a single file,
> scripts/syscalltbl.sh.
>
> The code-diff is attractive:
>
> 51 files changed, 254 insertions(+), 674 deletions(-)
> delete mode 100644 arch/alpha/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/arm/tools/syscalltbl.sh
> delete mode 100644 arch/ia64/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/m68k/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/microblaze/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/mips/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/parisc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/powerpc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/sh/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/sparc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/x86/entry/syscalls/syscalltbl.sh
> delete mode 100644 arch/xtensa/kernel/syscalls/syscalltbl.sh
> create mode 100644 scripts/syscalltbl.sh
>
> Also, this includes Makefile fixes, and some x86 fixes and cleanups.
>
> My question is, how to merge this series.
>
> I am touching all architectures, but the first patch is a prerequisite
> of the rest of this series.
>
> One possibility is to ask the x86 maintainers to pickup the first 5
> patches for v5.12-rc1, and then send the rest for v5.13-rc1,
> splitting per-arch.
>
> I want the x86 maintainers to check the first 5 patches because
> I cleaned up the x32 code.
Never mind.
Sending too big patch set tends to fail.
I will apply the generic script parts to my tree,
then split the rest per arch in the next development cycle
(aim for v5.13-rc1)
> I know x32 was considered for deprecation, but my motivation is to
> clean-up scripts across the tree without changing the functionality.
>
>
>
> Masahiro Yamada (27):
> scripts: add generic syscalltbl.sh
> x86/syscalls: fix -Wmissing-prototypes warnings from COND_SYSCALL()
> x86/build: add missing FORCE and fix 'targets' to make if_changed work
> x86/entry/x32: rename __x32_compat_sys_* to __x64_compat_sys_*
> x86/syscalls: switch to generic syscalltbl.sh
> ARM: syscalls: switch to generic syscalltbl.sh
> alpha: add missing FORCE and fix 'targets' to make if_changed work
> alpha: syscalls: switch to generic syscalltbl.sh
> ia64: add missing FORCE and fix 'targets' to make if_changed work
> ia64: syscalls: switch to generic syscalltbl.sh
> m68k: add missing FORCE and fix 'targets' to make if_changed work
> m68k: syscalls: switch to generic syscalltbl.sh
> microblaze: add missing FORCE and fix 'targets' to make if_changed
> work
> microblaze: syscalls: switch to generic syscalltbl.sh
> mips: add missing FORCE and fix 'targets' to make if_changed work
> mips: syscalls: switch to generic syscalltbl.sh
> parisc: add missing FORCE and fix 'targets' to make if_changed work
> parisc: syscalls: switch to generic syscalltbl.sh
> sh: add missing FORCE and fix 'targets' to make if_changed work
> sh: syscalls: switch to generic syscalltbl.sh
> sparc: remove wrong comment from arch/sparc/include/asm/Kbuild
> sparc: add missing FORCE and fix 'targets' to make if_changed work
> sparc: syscalls: switch to generic syscalltbl.sh
> powerpc: add missing FORCE and fix 'targets' to make if_changed work
> powerpc: syscalls: switch to generic syscalltbl.sh
> xtensa: add missing FORCE and fix 'targets' to make if_changed work
> xtensa: syscalls: switch to generic syscalltbl.sh
>
> arch/alpha/kernel/syscalls/Makefile | 18 +++----
> arch/alpha/kernel/syscalls/syscalltbl.sh | 32 -----------
> arch/alpha/kernel/systbls.S | 3 +-
> arch/arm/kernel/entry-common.S | 8 +--
> arch/arm/tools/Makefile | 9 ++--
> arch/arm/tools/syscalltbl.sh | 22 --------
> arch/ia64/kernel/entry.S | 3 +-
> arch/ia64/kernel/syscalls/Makefile | 19 +++----
> arch/ia64/kernel/syscalls/syscalltbl.sh | 32 -----------
> arch/m68k/kernel/syscalls/Makefile | 18 +++----
> arch/m68k/kernel/syscalls/syscalltbl.sh | 32 -----------
> arch/m68k/kernel/syscalltable.S | 3 +-
> arch/microblaze/kernel/syscall_table.S | 3 +-
> arch/microblaze/kernel/syscalls/Makefile | 18 +++----
> arch/microblaze/kernel/syscalls/syscalltbl.sh | 32 -----------
> arch/mips/include/asm/Kbuild | 7 ++-
> arch/mips/kernel/scall32-o32.S | 4 +-
> arch/mips/kernel/scall64-n32.S | 3 +-
> arch/mips/kernel/scall64-n64.S | 3 +-
> arch/mips/kernel/scall64-o32.S | 4 +-
> arch/mips/kernel/syscalls/Makefile | 53 ++++++++-----------
> arch/mips/kernel/syscalls/syscalltbl.sh | 36 -------------
> arch/parisc/include/asm/Kbuild | 1 -
> arch/parisc/kernel/syscall.S | 16 +++---
> arch/parisc/kernel/syscalls/Makefile | 34 +++++-------
> arch/parisc/kernel/syscalls/syscalltbl.sh | 36 -------------
> arch/powerpc/include/asm/Kbuild | 1 -
> arch/powerpc/kernel/syscalls/Makefile | 39 +++++---------
> arch/powerpc/kernel/syscalls/syscalltbl.sh | 36 -------------
> arch/powerpc/kernel/systbl.S | 5 +-
> arch/powerpc/platforms/cell/spu_callbacks.c | 2 +-
> arch/sh/kernel/syscalls/Makefile | 18 +++----
> arch/sh/kernel/syscalls/syscalltbl.sh | 32 -----------
> arch/sparc/include/asm/Kbuild | 3 --
> arch/sparc/kernel/syscalls/Makefile | 34 +++++-------
> arch/sparc/kernel/syscalls/syscalltbl.sh | 36 -------------
> arch/sparc/kernel/systbls_32.S | 4 +-
> arch/sparc/kernel/systbls_64.S | 8 +--
> arch/x86/entry/syscall_32.c | 12 +++--
> arch/x86/entry/syscall_64.c | 9 ++--
> arch/x86/entry/syscall_x32.c | 27 ++--------
> arch/x86/entry/syscalls/Makefile | 33 +++++++-----
> arch/x86/entry/syscalls/syscalltbl.sh | 46 ----------------
> arch/x86/include/asm/Kbuild | 1 +
> arch/x86/include/asm/syscall_wrapper.h | 11 ++--
> arch/x86/um/sys_call_table_32.c | 8 +--
> arch/x86/um/sys_call_table_64.c | 9 ++--
> arch/xtensa/kernel/syscall.c | 3 +-
> arch/xtensa/kernel/syscalls/Makefile | 18 +++----
> arch/xtensa/kernel/syscalls/syscalltbl.sh | 32 -----------
> scripts/syscalltbl.sh | 52 ++++++++++++++++++
> 51 files changed, 254 insertions(+), 674 deletions(-)
> delete mode 100644 arch/alpha/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/arm/tools/syscalltbl.sh
> delete mode 100644 arch/ia64/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/m68k/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/microblaze/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/mips/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/parisc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/powerpc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/sh/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/sparc/kernel/syscalls/syscalltbl.sh
> delete mode 100644 arch/x86/entry/syscalls/syscalltbl.sh
> delete mode 100644 arch/xtensa/kernel/syscalls/syscalltbl.sh
> create mode 100644 scripts/syscalltbl.sh
>
> --
> 2.27.0
>
--
Best Regards
Masahiro Yamada
^ permalink raw reply
* Re: [PATCH v4 1/3] powerpc/book3s64/radix/tlb: tlbie primitives for process-scoped invalidations from guests
From: kernel test robot @ 2021-02-15 13:10 UTC (permalink / raw)
To: Bharata B Rao, kvm-ppc, linuxppc-dev
Cc: kbuild-all, farosas, npiggin, Bharata B Rao, clang-built-linux,
aneesh.kumar, david
In-Reply-To: <20210215063542.3642366-2-bharata@linux.ibm.com>
[-- Attachment #1: Type: text/plain, Size: 3274 bytes --]
Hi Bharata,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v5.11]
[cannot apply to powerpc/next next-20210212]
[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/Bharata-B-Rao/Support-for-H_RPT_INVALIDATE-in-PowerPC-KVM/20210215-143815
base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: powerpc64-randconfig-r005-20210215 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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 powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://github.com/0day-ci/linux/commit/2a2c1320dc2bc67ec962721c39e7639cc1abfa9d
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Bharata-B-Rao/Support-for-H_RPT_INVALIDATE-in-PowerPC-KVM/20210215-143815
git checkout 2a2c1320dc2bc67ec962721c39e7639cc1abfa9d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> arch/powerpc/mm/book3s64/radix_tlb.c:399:20: error: unused function '_tlbie_pid_lpid' [-Werror,-Wunused-function]
static inline void _tlbie_pid_lpid(unsigned long pid, unsigned long lpid,
^
>> arch/powerpc/mm/book3s64/radix_tlb.c:643:20: error: unused function '_tlbie_va_range_lpid' [-Werror,-Wunused-function]
static inline void _tlbie_va_range_lpid(unsigned long start, unsigned long end,
^
2 errors generated.
vim +/_tlbie_pid_lpid +399 arch/powerpc/mm/book3s64/radix_tlb.c
398
> 399 static inline void _tlbie_pid_lpid(unsigned long pid, unsigned long lpid,
400 unsigned long ric)
401 {
402 asm volatile("ptesync" : : : "memory");
403
404 /*
405 * Workaround the fact that the "ric" argument to __tlbie_pid
406 * must be a compile-time contraint to match the "i" constraint
407 * in the asm statement.
408 */
409 switch (ric) {
410 case RIC_FLUSH_TLB:
411 __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_TLB);
412 fixup_tlbie_pid_lpid(pid, lpid);
413 break;
414 case RIC_FLUSH_PWC:
415 __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_PWC);
416 break;
417 case RIC_FLUSH_ALL:
418 default:
419 __tlbie_pid_lpid(pid, lpid, RIC_FLUSH_ALL);
420 fixup_tlbie_pid_lpid(pid, lpid);
421 }
422 asm volatile("eieio; tlbsync; ptesync" : : : "memory");
423 }
424 struct tlbiel_pid {
425 unsigned long pid;
426 unsigned long ric;
427 };
428
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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^ permalink raw reply
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