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| author | Remi Denis-Courmont <remi.denis.courmont@huawei.com> | 2020-03-04 11:36:31 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-03-24 11:48:24 +0000 |
| commit | dc374b477f9233296bf2da31854e486e1781169e (patch) | |
| tree | a61ee700139111432d262ab6e071f822f59d9c1d /arch/arm64/kvm/hyp-init.S | |
| parent | 9a25136a61179fe79689abf3c3fc67f89ce9ec13 (diff) | |
| download | lwn-dc374b477f9233296bf2da31854e486e1781169e.tar.gz lwn-dc374b477f9233296bf2da31854e486e1781169e.zip | |
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 95b3f74bec203804658e17f86fe20755bb8abcb9.
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>
Diffstat (limited to 'arch/arm64/kvm/hyp-init.S')
| -rw-r--r-- | arch/arm64/kvm/hyp-init.S | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S index 84f32cf5abc7..6e6ed5581eed 100644 --- a/arch/arm64/kvm/hyp-init.S +++ b/arch/arm64/kvm/hyp-init.S @@ -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 |