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OpenCloudOS-Kernel
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arm64: use mov_q instead of literal ldr 

In practice, this requires only 2 instructions, or even only 1 for
the idmap_pg_dir size (with 4 or 64 KiB pages). Only the MAIR values
needed more than 2 instructions and it was already converted to mov_q
by 95b3f74bec.

Signed-off-by: Remi Denis-Courmont <remi.denis.courmont@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
This commit is contained in:
Remi Denis-Courmont 2020-03-04 11:36:31 +02:00 committed by Catalin Marinas
parent 9a25136a61
commit dc374b477f
5 changed files with 8 additions and 12 deletions
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2
arch/arm64/kernel/cpu-reset.S
View File

@ -32,7 +32,7 @@
ENTRY(__cpu_soft_restart)
/* Clear sctlr_el1 flags. */
mrs x12, sctlr_el1
ldr x13, =SCTLR_ELx_FLAGS
mov_q x13, SCTLR_ELx_FLAGS
bic x12, x12, x13
pre_disable_mmu_workaround
msr sctlr_el1, x12

2
arch/arm64/kernel/hyp-stub.S
View File

@ -63,7 +63,7 @@ el1_sync:
beq 9f // Nothing to reset!
/* Someone called kvm_call_hyp() against the hyp-stub... */
ldr x0, =HVC_STUB_ERR
mov_q x0, HVC_STUB_ERR
eret
9: mov x0, xzr

4
arch/arm64/kernel/relocate_kernel.S
View File

@ -41,7 +41,7 @@ ENTRY(arm64_relocate_new_kernel)
cmp x0, #CurrentEL_EL2
b.ne 1f
mrs x0, sctlr_el2
ldr x1, =SCTLR_ELx_FLAGS
mov_q x1, SCTLR_ELx_FLAGS
bic x0, x0, x1
pre_disable_mmu_workaround
msr sctlr_el2, x0
@ -113,8 +113,6 @@ ENTRY(arm64_relocate_new_kernel)
ENDPROC(arm64_relocate_new_kernel)
.ltorg
.align 3 /* To keep the 64-bit values below naturally aligned. */
.Lcopy_end:

10
arch/arm64/kvm/hyp-init.S
View File

@ -60,7 +60,7 @@ alternative_else_nop_endif
msr ttbr0_el2, x4
mrs x4, tcr_el1
ldr x5, =TCR_EL2_MASK
mov_q x5, TCR_EL2_MASK
and x4, x4, x5
mov x5, #TCR_EL2_RES1
orr x4, x4, x5
@ -102,7 +102,7 @@ alternative_else_nop_endif
* as well as the EE bit on BE. Drop the A flag since the compiler
* is allowed to generate unaligned accesses.
*/
ldr x4, =(SCTLR_EL2_RES1 | (SCTLR_ELx_FLAGS & ~SCTLR_ELx_A))
mov_q x4, (SCTLR_EL2_RES1 | (SCTLR_ELx_FLAGS & ~SCTLR_ELx_A))
CPU_BE( orr x4, x4, #SCTLR_ELx_EE)
msr sctlr_el2, x4
isb
@ -142,7 +142,7 @@ reset:
* case we coming via HVC_SOFT_RESTART.
*/
mrs x5, sctlr_el2
ldr x6, =SCTLR_ELx_FLAGS
mov_q x6, SCTLR_ELx_FLAGS
bic x5, x5, x6 // Clear SCTL_M and etc
pre_disable_mmu_workaround
msr sctlr_el2, x5
@ -155,11 +155,9 @@ reset:
eret
1: /* Bad stub call */
ldr x0, =HVC_STUB_ERR
mov_q x0, HVC_STUB_ERR
eret
SYM_CODE_END(__kvm_handle_stub_hvc)
.ltorg
.popsection

2
arch/arm64/mm/proc.S
View File

@ -436,7 +436,7 @@ SYM_FUNC_START(__cpu_setup)
* Set/prepare TCR and TTBR. We use 512GB (39-bit) address range for
* both user and kernel.
*/
ldr x10, =TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
mov_q x10, TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \
TCR_TBI0 | TCR_A1 | TCR_KASAN_FLAGS
tcr_clear_errata_bits x10, x9, x5