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| author | Marc Zyngier <maz@kernel.org> | 2020-10-21 21:52:54 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-11-27 11:32:44 +0000 |
| commit | 29052f1b92f2bcb0419c544459f4c919bfb20898 (patch) | |
| tree | ddb7910c8bc242787b6638f75baa11461593850c /arch/arm64/kvm | |
| parent | 68b824e428c5fb5c3dc5ef80b1543e767534b58e (diff) | |
| download | linux-29052f1b92f2bcb0419c544459f4c919bfb20898.tar.gz linux-29052f1b92f2bcb0419c544459f4c919bfb20898.tar.bz2 linux-29052f1b92f2bcb0419c544459f4c919bfb20898.zip | |
KVM: arm64: Simplify __kvm_enable_ssbs()
Move the setting of SSBS directly into the HVC handler, using
the C helpers rather than the inline asssembly code.
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/hyp-main.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/sysreg-sr.c | 11 |
2 files changed, 5 insertions, 12 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c index c0543b2e760e..82df7fc24760 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -58,7 +58,11 @@ static void handle___kvm_timer_set_cntvoff(struct kvm_cpu_context *host_ctxt) static void handle___kvm_enable_ssbs(struct kvm_cpu_context *host_ctxt) { - __kvm_enable_ssbs(); + u64 tmp; + + tmp = read_sysreg_el2(SYS_SCTLR); + tmp |= SCTLR_ELx_DSSBS; + write_sysreg_el2(tmp, SYS_SCTLR); } static void handle___vgic_v3_get_ich_vtr_el2(struct kvm_cpu_context *host_ctxt) diff --git a/arch/arm64/kvm/hyp/nvhe/sysreg-sr.c b/arch/arm64/kvm/hyp/nvhe/sysreg-sr.c index 88a25fc8fcd3..29305022bc04 100644 --- a/arch/arm64/kvm/hyp/nvhe/sysreg-sr.c +++ b/arch/arm64/kvm/hyp/nvhe/sysreg-sr.c @@ -33,14 +33,3 @@ void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt) __sysreg_restore_user_state(ctxt); __sysreg_restore_el2_return_state(ctxt); } - -void __kvm_enable_ssbs(void) -{ - u64 tmp; - - asm volatile( - "mrs %0, sctlr_el2\n" - "orr %0, %0, %1\n" - "msr sctlr_el2, %0" - : "=&r" (tmp) : "L" (SCTLR_ELx_DSSBS)); -} |