Every year or so, I make an attempt at contributing assembler macros
that encapsulate PC-relative references, including loads and stores,
and updating existing assembler code to make it more readable and
concise.
Patch #1 implements adr_l, ldr_l and str_l macros that emit PC-relative
references with unlimited range. For v7 and later, relative movw/movt
pairs are used (avoiding the need for loading literals via the D-cache).
For older CPUs, a literal containing a relative offset wrt the instruction
that adds the value of PC is emitted into a subsection, which works around
the objections given last time around, regarding the limited range of
PC-relative group relocations, and the fact that they are EABI only. In
this case, the range is unlimited, although the subsection needs to be
emitted within 4 K of the ldr instruction. (This limit can be extended
but that is currently unnecessary: .text sizes of objects built from .S
files never exceed 4 K in size. Please refer to the list below, after
the diffstat, for the sizes of the .text sections of all such objects
that are built as part of a multi_v7_defconfig kernel)
All patches beyond #1 are independent, but obviously all depend on the
first one. I understand there may be concerns about churn, but some of
these cleanups are really quite nice so please don't dismiss the series
wholesale for that reason.
Ard Biesheuvel (15):
ARM: assembler: introduce adr_l, ldr_l and str_l macros
ARM: head-common.S: use PC-relative insn sequence for __proc_info
ARM: head-common.S: use PC-relative insn sequence for __turn_mmu_on
ARM: head.S: use PC-relative insn sequence for secondary_data
ARM: head: use PC-relative insn sequence for __smp_alt
ARM: sleep.S: use PC-relative insn sequence for
sleep_save_sp/mpidr_hash
ARM: head.S: use PC-relative insn sequences for __fixup_pv_table
ARM: head.S: use PC relative insn sequence to calculate PHYS_OFFSET
ARM: kvm: replace open coded VA->PA calculations with adr_l call
arm-soc: exynos: replace open coded VA->PA conversions
arm-soc: mvebu: replace open coded VA->PA conversion
arm-soc: omap: replace open coded VA->PA calculations
arm-soc: various: replace open coded VA->PA calculation of pen_release
arm-soc: shmobile: replace open coded VA->PA calculation
ARM: l2c: replace open coded VA->PA calculation
arch/arm/boot/compressed/head.S | 15 +---
arch/arm/include/asm/assembler.h | 70 +++++++++++++++++
arch/arm/kernel/head-common.S | 22 ++----
arch/arm/kernel/head.S | 80 +++++---------------
arch/arm/kernel/hyp-stub.S | 33 +++-----
arch/arm/kernel/sleep.S | 16 +---
arch/arm/kvm/init.S | 8 +-
arch/arm/mach-exynos/headsmp.S | 9 +--
arch/arm/mach-exynos/sleep.S | 26 ++-----
arch/arm/mach-mvebu/coherency_ll.S | 8 +-
arch/arm/mach-omap2/sleep34xx.S | 21 +----
arch/arm/mach-omap2/sleep44xx.S | 12 +--
arch/arm/mach-prima2/headsmp.S | 11 +--
arch/arm/mach-shmobile/headsmp.S | 14 +---
arch/arm/mach-spear/headsmp.S | 11 +--
arch/arm/mach-sti/headsmp.S | 10 +--
arch/arm/mm/l2c-l2x0-resume.S | 7 +-
arch/arm/plat-versatile/headsmp.S | 9 +--
18 files changed, 140 insertions(+)
--
2.11.0
text data bss dec hex filename
240 0 0 240 f0 linux-arm-build/arch/arm/lib/div64.o
1608 0 0 1608 648
linux-arm-build/arch/arm/lib/copy_to_user.o
892 0 0 892 37c
linux-arm-build/arch/arm/lib/csumpartialcopy.o
288 0 0 288 120
linux-arm-build/arch/arm/lib/io-writesb.o
28 0 0 28 1c linux-arm-build/arch/arm/lib/ashldi3.o
104 0 0 104 68
linux-arm-build/arch/arm/lib/testclearbit.o
44 0 0 44 2c linux-arm-build/arch/arm/lib/ucmpdi2.o
204 0 0 204 cc
linux-arm-build/arch/arm/lib/io-writesw-armv4.o
52 0 0 52 34 linux-arm-build/arch/arm/lib/csumipv6.o
900 0 0 900 384 linux-arm-build/arch/arm/lib/memmove.o
764 0 0 764 2fc
linux-arm-build/arch/arm/lib/lib1funcs.o
68 0 0 68 44
linux-arm-build/arch/arm/lib/changebit.o
104 0 0 104 68
linux-arm-build/arch/arm/lib/testsetbit.o
188 0 0 188 bc
linux-arm-build/arch/arm/lib/io-readsl.o
1476 0 0 1476 5c4
linux-arm-build/arch/arm/lib/csumpartialcopyuser.o
12 0 0 12 c
linux-arm-build/arch/arm/lib/bswapsdi2.o
48 0 0 48 30
linux-arm-build/arch/arm/lib/delay-loop.o
144 0 0 144 90 linux-arm-build/arch/arm/lib/putuser.o
28 0 0 28 1c linux-arm-build/arch/arm/lib/ashrdi3.o
172 0 0 172 ac linux-arm-build/arch/arm/lib/findbit.o
1616 0 0 1616 650
linux-arm-build/arch/arm/lib/copy_from_user.o
148 0 0 148 94 linux-arm-build/arch/arm/lib/getuser.o
212 0 0 212 d4
linux-arm-build/arch/arm/lib/clear_user.o
228 0 0 228 e4
linux-arm-build/arch/arm/lib/io-readsw-armv4.o
176 0 0 176 b0 linux-arm-build/arch/arm/lib/memzero.o
4 0 0 4 4
linux-arm-build/arch/arm/lib/backtrace.o
104 0 0 104 68
linux-arm-build/arch/arm/lib/testchangebit.o
232 0 0 232 e8
linux-arm-build/arch/arm/lib/csumpartial.o
28 0 0 28 1c linux-arm-build/arch/arm/lib/strrchr.o
184 0 0 184 b8 linux-arm-build/arch/arm/lib/memset.o
68 0 0 68 44 linux-arm-build/arch/arm/lib/setbit.o
32 0 0 32 20 linux-arm-build/arch/arm/lib/strchr.o
60 0 0 60 3c linux-arm-build/arch/arm/lib/muldi3.o
24 0 0 24 18 linux-arm-build/arch/arm/lib/memchr.o
320 0 0 320 140
linux-arm-build/arch/arm/lib/io-readsb.o
28 0 0 28 1c linux-arm-build/arch/arm/lib/lshrdi3.o
32 0 0 32 20
linux-arm-build/arch/arm/lib/call_with_stack.o
112 0 0 112 70
linux-arm-build/arch/arm/lib/copy_page.o
156 0 0 156 9c
linux-arm-build/arch/arm/lib/io-writesl.o
68 0 0 68 44 linux-arm-build/arch/arm/lib/clearbit.o
884 0 0 884 374 linux-arm-build/arch/arm/lib/memcpy.o
104 0 0 104 68 linux-arm-build/arch/arm/common/vlock.o
280 0 260 540 21c
linux-arm-build/arch/arm/common/mcpm_head.o
2760 0 4096 6856 1ac8
linux-arm-build/arch/arm/boot/compressed/head.o
7324164 0 0 7324164 6fc204
linux-arm-build/arch/arm/boot/compressed/piggy.o
4 0 0 4 4
linux-arm-build/arch/arm/mach-berlin/headsmp.o
116 0 192 308 134
linux-arm-build/arch/arm/mach-shmobile/headsmp.o
32 0 0 32 20
linux-arm-build/arch/arm/mach-shmobile/headsmp-scu.o
16 0 0 16 10
linux-arm-build/arch/arm/mach-exynos/exynos-smc.o
168 8 0 176 b0
linux-arm-build/arch/arm/mach-exynos/sleep.o
28 0 0 28 1c
linux-arm-build/arch/arm/mach-exynos/headsmp.o
12 0 0 12 c
linux-arm-build/arch/arm/mach-keystone/smc.o
676 0 0 676 2a4
linux-arm-build/arch/arm/mach-at91/pm_suspend.o
8 0 0 8 8
linux-arm-build/arch/arm/mach-zynq/headsmp.o
20 0 0 20 14
linux-arm-build/arch/arm/mach-highbank/smc.o
0 64 0 64 40
linux-arm-build/arch/arm/mach-rockchip/sleep.o
8 0 0 8 8
linux-arm-build/arch/arm/mach-rockchip/headsmp.o
24 0 0 24 18 linux-arm-build/arch/arm/mm/abort-ev7.o
792 44 0 836 344 linux-arm-build/arch/arm/mm/cache-v7.o
1672 192 28 1892 764 linux-arm-build/arch/arm/mm/proc-v7.o
140 0 0 140 8c linux-arm-build/arch/arm/mm/tlb-v7.o
12 0 0 12 c linux-arm-build/arch/arm/mm/pabort-v7.o
88 0 0 88 58
linux-arm-build/arch/arm/mm/l2c-l2x0-resume.o
28 0 0 28 1c
linux-arm-build/arch/arm/mach-sti/headsmp.o
164 0 0 164 a4
linux-arm-build/arch/arm/mach-imx/suspend-imx53.o
648 0 0 648 288
linux-arm-build/arch/arm/mach-imx/suspend-imx6.o
24 0 0 24 18
linux-arm-build/arch/arm/mach-imx/headsmp.o
148 0 0 148 94
linux-arm-build/arch/arm/mach-omap2/omap-smc.o
148 0 0 148 94
linux-arm-build/arch/arm/mach-omap2/omap-headsmp.o
864 124 0 988 3dc
linux-arm-build/arch/arm/mach-omap2/sleep34xx.o
748 12 0 760 2f8
linux-arm-build/arch/arm/mach-omap2/sleep44xx.o
28 0 0 28 1c
linux-arm-build/arch/arm/plat-versatile/headsmp.o
1156 0 0 1156 484
linux-arm-build/arch/arm/mach-tegra/sleep-tegra20.o
640 0 0 640 280
linux-arm-build/arch/arm/mach-tegra/reset-handler.o
2308 0 0 2308 904
linux-arm-build/arch/arm/mach-tegra/sleep-tegra30.o
284 0 0 284 11c
linux-arm-build/arch/arm/mach-tegra/sleep.o
76 0 0 76 4c
linux-arm-build/arch/arm/mach-mvebu/pmsu_ll.o
192 0 0 192 c0
linux-arm-build/arch/arm/mach-mvebu/coherency_ll.o
8 0 0 8 8
linux-arm-build/arch/arm/mach-mvebu/headsmp-a9.o
12 0 0 12 c
linux-arm-build/arch/arm/mach-mvebu/headsmp.o
32 0 0 32 20
linux-arm-build/arch/arm/mach-socfpga/headsmp.o
40 0 0 40 28
linux-arm-build/arch/arm/mach-spear/headsmp.o
100 0 0 100 64
linux-arm-build/arch/arm/mach-prima2/sleep.o
28 0 0 28 1c
linux-arm-build/arch/arm/mach-prima2/headsmp.o
24 0 0 24 18
linux-arm-build/arch/arm/vdso/datapage.o
0 4096 0 4096 1000 linux-arm-build/arch/arm/vdso/vdso.o
36 0 0 36 24 linux-arm-build/arch/arm/vfp/entry.o
1296 0 0 1296 510 linux-arm-build/arch/arm/vfp/vfphw.o
356 4 0 360 168
linux-arm-build/arch/arm/kernel/hyp-stub.o
1096 16 0 1112 458 linux-arm-build/arch/arm/kernel/head.o
3308 12 0 3320 cf8
linux-arm-build/arch/arm/kernel/entry-armv.o
644 4 0 648 288
linux-arm-build/arch/arm/kernel/iwmmxt.o
28 0 0 28 1c
linux-arm-build/arch/arm/kernel/sigreturn_codes.o
2148 0 0 2148 864
linux-arm-build/arch/arm/kernel/entry-common.o
64 0 0 64 40
linux-arm-build/arch/arm/kernel/smccc-call.o
328 8 0 336 150 linux-arm-build/arch/arm/kernel/sleep.o
104 0 0 104 68
linux-arm-build/arch/arm/kernel/relocate_kernel.o
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
