KVM: arm64: hyp: Use ctxt_sys_reg/__vcpu_sys_reg instead of raw sys_regs access

Switch the hypervisor code to using ctxt_sys_reg/__vcpu_sys_reg instead
of raw sys_regs accesses. No intended functionnal change.

Signed-off-by: Marc Zyngier <maz@kernel.org>

5 files changed, 62 insertions, 65 deletions

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 5b168226088e..d9360f91ef44 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -561,7 +561,7 @@ DECLARE_PER_CPU(kvm_host_data_t, kvm_host_data);
 static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt)
 {
 	/* The host's MPIDR is immutable, so let's set it up at boot time */
-	cpu_ctxt->sys_regs[MPIDR_EL1] = read_cpuid_mpidr();
+	ctxt_sys_reg(cpu_ctxt, MPIDR_EL1) = read_cpuid_mpidr();
 }
 
 static inline bool kvm_arch_requires_vhe(void)
diff --git a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
index 24e8acf9ec10..5499d6c1fd9f 100644
--- a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
+++ b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
@@ -104,7 +104,7 @@ static inline void __debug_save_state(struct kvm_vcpu *vcpu,
 	save_debug(dbg->dbg_wcr, dbgwcr, wrps);
 	save_debug(dbg->dbg_wvr, dbgwvr, wrps);
 
-	ctxt->sys_regs[MDCCINT_EL1] = read_sysreg(mdccint_el1);
+	ctxt_sys_reg(ctxt, MDCCINT_EL1) = read_sysreg(mdccint_el1);
 }
 
 static inline void __debug_restore_state(struct kvm_vcpu *vcpu,
@@ -124,7 +124,7 @@ static inline void __debug_restore_state(struct kvm_vcpu *vcpu,
 	restore_debug(dbg->dbg_wcr, dbgwcr, wrps);
 	restore_debug(dbg->dbg_wvr, dbgwvr, wrps);
 
-	write_sysreg(ctxt->sys_regs[MDCCINT_EL1], mdccint_el1);
+	write_sysreg(ctxt_sys_reg(ctxt, MDCCINT_EL1), mdccint_el1);
 }
 
 static inline void __debug_switch_to_guest_common(struct kvm_vcpu *vcpu)
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index 5c03441b5b6c..7cf14e4f9f77 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -53,7 +53,7 @@ static inline void __fpsimd_save_fpexc32(struct kvm_vcpu *vcpu)
 	if (!vcpu_el1_is_32bit(vcpu))
 		return;
 
-	vcpu->arch.ctxt.sys_regs[FPEXC32_EL2] = read_sysreg(fpexc32_el2);
+	__vcpu_sys_reg(vcpu, FPEXC32_EL2) = read_sysreg(fpexc32_el2);
 }
 
 static inline void __activate_traps_fpsimd32(struct kvm_vcpu *vcpu)
@@ -268,15 +268,14 @@ static inline bool __hyp_handle_fpsimd(struct kvm_vcpu *vcpu)
 		sve_load_state(vcpu_sve_pffr(vcpu),
 			       &vcpu->arch.ctxt.gp_regs.fp_regs.fpsr,
 			       sve_vq_from_vl(vcpu->arch.sve_max_vl) - 1);
-		write_sysreg_s(vcpu->arch.ctxt.sys_regs[ZCR_EL1], SYS_ZCR_EL12);
+		write_sysreg_s(__vcpu_sys_reg(vcpu, ZCR_EL1), SYS_ZCR_EL12);
 	} else {
 		__fpsimd_restore_state(&vcpu->arch.ctxt.gp_regs.fp_regs);
 	}
 
 	/* Skip restoring fpexc32 for AArch64 guests */
 	if (!(read_sysreg(hcr_el2) & HCR_RW))
-		write_sysreg(vcpu->arch.ctxt.sys_regs[FPEXC32_EL2],
-			     fpexc32_el2);
+		write_sysreg(__vcpu_sys_reg(vcpu, FPEXC32_EL2), fpexc32_el2);
 
 	vcpu->arch.flags |= KVM_ARM64_FP_ENABLED;
 
diff --git a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h
index 6e04e061f762..37ef3e2cdbef 100644
--- a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h
+++ b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h
@@ -17,34 +17,34 @@
 
 static inline void __sysreg_save_common_state(struct kvm_cpu_context *ctxt)
 {
-	ctxt->sys_regs[MDSCR_EL1]	= read_sysreg(mdscr_el1);
+	ctxt_sys_reg(ctxt, MDSCR_EL1)	= read_sysreg(mdscr_el1);
 }
 
 static inline void __sysreg_save_user_state(struct kvm_cpu_context *ctxt)
 {
-	ctxt->sys_regs[TPIDR_EL0]	= read_sysreg(tpidr_el0);
-	ctxt->sys_regs[TPIDRRO_EL0]	= read_sysreg(tpidrro_el0);
+	ctxt_sys_reg(ctxt, TPIDR_EL0)	= read_sysreg(tpidr_el0);
+	ctxt_sys_reg(ctxt, TPIDRRO_EL0)	= read_sysreg(tpidrro_el0);
 }
 
 static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt)
 {
-	ctxt->sys_regs[CSSELR_EL1]	= read_sysreg(csselr_el1);
-	ctxt->sys_regs[SCTLR_EL1]	= read_sysreg_el1(SYS_SCTLR);
-	ctxt->sys_regs[CPACR_EL1]	= read_sysreg_el1(SYS_CPACR);
-	ctxt->sys_regs[TTBR0_EL1]	= read_sysreg_el1(SYS_TTBR0);
-	ctxt->sys_regs[TTBR1_EL1]	= read_sysreg_el1(SYS_TTBR1);
-	ctxt->sys_regs[TCR_EL1]		= read_sysreg_el1(SYS_TCR);
-	ctxt->sys_regs[ESR_EL1]		= read_sysreg_el1(SYS_ESR);
-	ctxt->sys_regs[AFSR0_EL1]	= read_sysreg_el1(SYS_AFSR0);
-	ctxt->sys_regs[AFSR1_EL1]	= read_sysreg_el1(SYS_AFSR1);
-	ctxt->sys_regs[FAR_EL1]		= read_sysreg_el1(SYS_FAR);
-	ctxt->sys_regs[MAIR_EL1]	= read_sysreg_el1(SYS_MAIR);
-	ctxt->sys_regs[VBAR_EL1]	= read_sysreg_el1(SYS_VBAR);
-	ctxt->sys_regs[CONTEXTIDR_EL1]	= read_sysreg_el1(SYS_CONTEXTIDR);
-	ctxt->sys_regs[AMAIR_EL1]	= read_sysreg_el1(SYS_AMAIR);
-	ctxt->sys_regs[CNTKCTL_EL1]	= read_sysreg_el1(SYS_CNTKCTL);
-	ctxt->sys_regs[PAR_EL1]		= read_sysreg(par_el1);
-	ctxt->sys_regs[TPIDR_EL1]	= read_sysreg(tpidr_el1);
+	ctxt_sys_reg(ctxt, CSSELR_EL1)	= read_sysreg(csselr_el1);
+	ctxt_sys_reg(ctxt, SCTLR_EL1)	= read_sysreg_el1(SYS_SCTLR);
+	ctxt_sys_reg(ctxt, CPACR_EL1)	= read_sysreg_el1(SYS_CPACR);
+	ctxt_sys_reg(ctxt, TTBR0_EL1)	= read_sysreg_el1(SYS_TTBR0);
+	ctxt_sys_reg(ctxt, TTBR1_EL1)	= read_sysreg_el1(SYS_TTBR1);
+	ctxt_sys_reg(ctxt, TCR_EL1)	= read_sysreg_el1(SYS_TCR);
+	ctxt_sys_reg(ctxt, ESR_EL1)	= read_sysreg_el1(SYS_ESR);
+	ctxt_sys_reg(ctxt, AFSR0_EL1)	= read_sysreg_el1(SYS_AFSR0);
+	ctxt_sys_reg(ctxt, AFSR1_EL1)	= read_sysreg_el1(SYS_AFSR1);
+	ctxt_sys_reg(ctxt, FAR_EL1)	= read_sysreg_el1(SYS_FAR);
+	ctxt_sys_reg(ctxt, MAIR_EL1)	= read_sysreg_el1(SYS_MAIR);
+	ctxt_sys_reg(ctxt, VBAR_EL1)	= read_sysreg_el1(SYS_VBAR);
+	ctxt_sys_reg(ctxt, CONTEXTIDR_EL1) = read_sysreg_el1(SYS_CONTEXTIDR);
+	ctxt_sys_reg(ctxt, AMAIR_EL1)	= read_sysreg_el1(SYS_AMAIR);
+	ctxt_sys_reg(ctxt, CNTKCTL_EL1)	= read_sysreg_el1(SYS_CNTKCTL);
+	ctxt_sys_reg(ctxt, PAR_EL1)	= read_sysreg(par_el1);
+	ctxt_sys_reg(ctxt, TPIDR_EL1)	= read_sysreg(tpidr_el1);
 
 	ctxt->gp_regs.sp_el1		= read_sysreg(sp_el1);
 	ctxt->gp_regs.elr_el1		= read_sysreg_el1(SYS_ELR);
@@ -57,55 +57,55 @@ static inline void __sysreg_save_el2_return_state(struct kvm_cpu_context *ctxt)
 	ctxt->gp_regs.regs.pstate	= read_sysreg_el2(SYS_SPSR);
 
 	if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN))
-		ctxt->sys_regs[DISR_EL1] = read_sysreg_s(SYS_VDISR_EL2);
+		ctxt_sys_reg(ctxt, DISR_EL1) = read_sysreg_s(SYS_VDISR_EL2);
 }
 
 static inline void __sysreg_restore_common_state(struct kvm_cpu_context *ctxt)
 {
-	write_sysreg(ctxt->sys_regs[MDSCR_EL1],	  mdscr_el1);
+	write_sysreg(ctxt_sys_reg(ctxt, MDSCR_EL1),  mdscr_el1);
 }
 
 static inline void __sysreg_restore_user_state(struct kvm_cpu_context *ctxt)
 {
-	write_sysreg(ctxt->sys_regs[TPIDR_EL0],		tpidr_el0);
-	write_sysreg(ctxt->sys_regs[TPIDRRO_EL0],	tpidrro_el0);
+	write_sysreg(ctxt_sys_reg(ctxt, TPIDR_EL0),	tpidr_el0);
+	write_sysreg(ctxt_sys_reg(ctxt, TPIDRRO_EL0),	tpidrro_el0);
 }
 
 static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
 {
-	write_sysreg(ctxt->sys_regs[MPIDR_EL1],		vmpidr_el2);
-	write_sysreg(ctxt->sys_regs[CSSELR_EL1],	csselr_el1);
+	write_sysreg(ctxt_sys_reg(ctxt, MPIDR_EL1),	vmpidr_el2);
+	write_sysreg(ctxt_sys_reg(ctxt, CSSELR_EL1),	csselr_el1);
 
 	if (has_vhe() ||
 	    !cpus_have_final_cap(ARM64_WORKAROUND_SPECULATIVE_AT)) {
-		write_sysreg_el1(ctxt->sys_regs[SCTLR_EL1],	SYS_SCTLR);
-		write_sysreg_el1(ctxt->sys_regs[TCR_EL1],	SYS_TCR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, SCTLR_EL1),	SYS_SCTLR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, TCR_EL1),	SYS_TCR);
 	} else	if (!ctxt->__hyp_running_vcpu) {
 		/*
 		 * Must only be done for guest registers, hence the context
 		 * test. We're coming from the host, so SCTLR.M is already
 		 * set. Pairs with nVHE's __activate_traps().
 		 */
-		write_sysreg_el1((ctxt->sys_regs[TCR_EL1] |
+		write_sysreg_el1((ctxt_sys_reg(ctxt, TCR_EL1) |
 				  TCR_EPD1_MASK | TCR_EPD0_MASK),
 				 SYS_TCR);
 		isb();
 	}
 
-	write_sysreg_el1(ctxt->sys_regs[CPACR_EL1],	SYS_CPACR);
-	write_sysreg_el1(ctxt->sys_regs[TTBR0_EL1],	SYS_TTBR0);
-	write_sysreg_el1(ctxt->sys_regs[TTBR1_EL1],	SYS_TTBR1);
-	write_sysreg_el1(ctxt->sys_regs[ESR_EL1],	SYS_ESR);
-	write_sysreg_el1(ctxt->sys_regs[AFSR0_EL1],	SYS_AFSR0);
-	write_sysreg_el1(ctxt->sys_regs[AFSR1_EL1],	SYS_AFSR1);
-	write_sysreg_el1(ctxt->sys_regs[FAR_EL1],	SYS_FAR);
-	write_sysreg_el1(ctxt->sys_regs[MAIR_EL1],	SYS_MAIR);
-	write_sysreg_el1(ctxt->sys_regs[VBAR_EL1],	SYS_VBAR);
-	write_sysreg_el1(ctxt->sys_regs[CONTEXTIDR_EL1],SYS_CONTEXTIDR);
-	write_sysreg_el1(ctxt->sys_regs[AMAIR_EL1],	SYS_AMAIR);
-	write_sysreg_el1(ctxt->sys_regs[CNTKCTL_EL1],	SYS_CNTKCTL);
-	write_sysreg(ctxt->sys_regs[PAR_EL1],		par_el1);
-	write_sysreg(ctxt->sys_regs[TPIDR_EL1],		tpidr_el1);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, CPACR_EL1),	SYS_CPACR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, TTBR0_EL1),	SYS_TTBR0);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, TTBR1_EL1),	SYS_TTBR1);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, ESR_EL1),	SYS_ESR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, AFSR0_EL1),	SYS_AFSR0);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, AFSR1_EL1),	SYS_AFSR1);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, FAR_EL1),	SYS_FAR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, MAIR_EL1),	SYS_MAIR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, VBAR_EL1),	SYS_VBAR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, CONTEXTIDR_EL1), SYS_CONTEXTIDR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, AMAIR_EL1),	SYS_AMAIR);
+	write_sysreg_el1(ctxt_sys_reg(ctxt, CNTKCTL_EL1), SYS_CNTKCTL);
+	write_sysreg(ctxt_sys_reg(ctxt, PAR_EL1),	par_el1);
+	write_sysreg(ctxt_sys_reg(ctxt, TPIDR_EL1),	tpidr_el1);
 
 	if (!has_vhe() &&
 	    cpus_have_final_cap(ARM64_WORKAROUND_SPECULATIVE_AT) &&
@@ -120,9 +120,9 @@ static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
 		 * deconfigured and disabled. We can now restore the host's
 		 * S1 configuration: SCTLR, and only then TCR.
 		 */
-		write_sysreg_el1(ctxt->sys_regs[SCTLR_EL1],	SYS_SCTLR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, SCTLR_EL1),	SYS_SCTLR);
 		isb();
-		write_sysreg_el1(ctxt->sys_regs[TCR_EL1],	SYS_TCR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, TCR_EL1),	SYS_TCR);
 	}
 
 	write_sysreg(ctxt->gp_regs.sp_el1,		sp_el1);
@@ -153,51 +153,49 @@ static inline void __sysreg_restore_el2_return_state(struct kvm_cpu_context *ctx
 	write_sysreg_el2(pstate,			SYS_SPSR);
 
 	if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN))
-		write_sysreg_s(ctxt->sys_regs[DISR_EL1], SYS_VDISR_EL2);
+		write_sysreg_s(ctxt_sys_reg(ctxt, DISR_EL1), SYS_VDISR_EL2);
 }
 
 static inline void __sysreg32_save_state(struct kvm_vcpu *vcpu)
 {
-	u64 *spsr, *sysreg;
+	u64 *spsr;
 
 	if (!vcpu_el1_is_32bit(vcpu))
 		return;
 
 	spsr = vcpu->arch.ctxt.gp_regs.spsr;
-	sysreg = vcpu->arch.ctxt.sys_regs;
 
 	spsr[KVM_SPSR_ABT] = read_sysreg(spsr_abt);
 	spsr[KVM_SPSR_UND] = read_sysreg(spsr_und);
 	spsr[KVM_SPSR_IRQ] = read_sysreg(spsr_irq);
 	spsr[KVM_SPSR_FIQ] = read_sysreg(spsr_fiq);
 
-	sysreg[DACR32_EL2] = read_sysreg(dacr32_el2);
-	sysreg[IFSR32_EL2] = read_sysreg(ifsr32_el2);
+	__vcpu_sys_reg(vcpu, DACR32_EL2) = read_sysreg(dacr32_el2);
+	__vcpu_sys_reg(vcpu, IFSR32_EL2) = read_sysreg(ifsr32_el2);
 
 	if (has_vhe() || vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY)
-		sysreg[DBGVCR32_EL2] = read_sysreg(dbgvcr32_el2);
+		__vcpu_sys_reg(vcpu, DBGVCR32_EL2) = read_sysreg(dbgvcr32_el2);
 }
 
 static inline void __sysreg32_restore_state(struct kvm_vcpu *vcpu)
 {
-	u64 *spsr, *sysreg;
+	u64 *spsr;
 
 	if (!vcpu_el1_is_32bit(vcpu))
 		return;
 
 	spsr = vcpu->arch.ctxt.gp_regs.spsr;
-	sysreg = vcpu->arch.ctxt.sys_regs;
 
 	write_sysreg(spsr[KVM_SPSR_ABT], spsr_abt);
 	write_sysreg(spsr[KVM_SPSR_UND], spsr_und);
 	write_sysreg(spsr[KVM_SPSR_IRQ], spsr_irq);
 	write_sysreg(spsr[KVM_SPSR_FIQ], spsr_fiq);
 
-	write_sysreg(sysreg[DACR32_EL2], dacr32_el2);
-	write_sysreg(sysreg[IFSR32_EL2], ifsr32_el2);
+	write_sysreg(__vcpu_sys_reg(vcpu, DACR32_EL2), dacr32_el2);
+	write_sysreg(__vcpu_sys_reg(vcpu, IFSR32_EL2), ifsr32_el2);
 
 	if (has_vhe() || vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY)
-		write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2);
+		write_sysreg(__vcpu_sys_reg(vcpu, DBGVCR32_EL2), dbgvcr32_el2);
 }
 
 #endif /* __ARM64_KVM_HYP_SYSREG_SR_H__ */
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 37321b2157d9..341be2f2f312 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -52,9 +52,9 @@ static void __activate_traps(struct kvm_vcpu *vcpu)
 		 * configured and enabled. We can now restore the guest's S1
 		 * configuration: SCTLR, and only then TCR.
 		 */
-		write_sysreg_el1(ctxt->sys_regs[SCTLR_EL1],	SYS_SCTLR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, SCTLR_EL1),	SYS_SCTLR);
 		isb();
-		write_sysreg_el1(ctxt->sys_regs[TCR_EL1],	SYS_TCR);
+		write_sysreg_el1(ctxt_sys_reg(ctxt, TCR_EL1),	SYS_TCR);
 	}
 }