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| author | Marc Zyngier <maz@kernel.org> | 2020-10-21 22:52:54 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-11-27 12:32:44 +0100 |
| commit | 29052f1b92f2bcb0419c544459f4c919bfb20898 (patch) | |
| tree | ddb7910c8bc242787b6638f75baa11461593850c /arch | |
| parent | KVM: arm64: Patch kimage_voffset instead of loading the EL1 value (diff) | |
| download | linux-29052f1b92f2bcb0419c544459f4c919bfb20898.tar.xz 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')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/hyp-main.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/sysreg-sr.c | 11 |
4 files changed, 6 insertions, 14 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 54387ccd1ab2..a542c422a036 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -189,8 +189,6 @@ extern void __kvm_timer_set_cntvoff(u64 cntvoff); extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); -extern void __kvm_enable_ssbs(void); - extern u64 __vgic_v3_get_ich_vtr_el2(void); extern u64 __vgic_v3_read_vmcr(void); extern void __vgic_v3_write_vmcr(u32 vmcr); diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 174817ba119c..153faa15d490 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -461,6 +461,7 @@ #define SYS_PMCCFILTR_EL0 sys_reg(3, 3, 14, 15, 7) +#define SYS_SCTLR_EL2 sys_reg(3, 4, 1, 0, 0) #define SYS_ZCR_EL2 sys_reg(3, 4, 1, 2, 0) #define SYS_DACR32_EL2 sys_reg(3, 4, 3, 0, 0) #define SYS_SPSR_EL2 sys_reg(3, 4, 4, 0, 0) 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)); -} |