From: Marc Zyngier <marc.zyngier@arm.com> To: "Paolo Bonzini" <pbonzini@redhat.com>, "Radim Krčmář" <rkrcmar@redhat.com> Cc: Punit Agrawal <punit.agrawal@arm.com>, kvm@vger.kernel.org, "Gustavo A . R . Silva" <gustavo@embeddedor.com>, Will Deacon <will.deacon@arm.com>, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Lukas Braun <koomi@moshbit.net> Subject: [PATCH 22/28] KVM: arm64: Make vcpu const in vcpu_read_sys_reg Date: Wed, 19 Dec 2018 18:03:43 +0000 [thread overview] Message-ID: <20181219180349.242681-23-marc.zyngier@arm.com> (raw) In-Reply-To: <20181219180349.242681-1-marc.zyngier@arm.com> From: Christoffer Dall <christoffer.dall@arm.com> vcpu_read_sys_reg should not be modifying the VCPU structure. Eventually, to handle EL2 sysregs for nested virtualization, we will call vcpu_read_sys_reg from places that have a const vcpu pointer, which will complain about the lack of the const modifier on the read path. Signed-off-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/kvm/sys_regs.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 7a5035f9c5c3..c22e50ba3473 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -319,7 +319,7 @@ struct kvm_vcpu_arch { */ #define __vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) -u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg); +u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg); void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg); /* diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index ecbf67ccabf5..965c6f1706d6 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -76,7 +76,7 @@ static bool write_to_read_only(struct kvm_vcpu *vcpu, return false; } -u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg) +u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg) { if (!vcpu->arch.sysregs_loaded_on_cpu) goto immediate_read; -- 2.19.2
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com> To: "Paolo Bonzini" <pbonzini@redhat.com>, "Radim Krčmář" <rkrcmar@redhat.com> Cc: "Mark Rutland" <mark.rutland@arm.com>, "Punit Agrawal" <punit.agrawal@arm.com>, kvm@vger.kernel.org, "Julien Thierry" <julien.thierry@arm.com>, "Gustavo A . R . Silva" <gustavo@embeddedor.com>, "Will Deacon" <will.deacon@arm.com>, "Christoffer Dall" <christoffer.dall@arm.com>, linux-arm-kernel@lists.infradead.org, punitagrawal@gmail.com, "Alex Bennée" <alex.bennee@linaro.org>, kvmarm@lists.cs.columbia.edu, "Suzuki Poulose" <suzuki.poulose@arm.com>, "Lukas Braun" <koomi@moshbit.net> Subject: [PATCH 22/28] KVM: arm64: Make vcpu const in vcpu_read_sys_reg Date: Wed, 19 Dec 2018 18:03:43 +0000 [thread overview] Message-ID: <20181219180349.242681-23-marc.zyngier@arm.com> (raw) In-Reply-To: <20181219180349.242681-1-marc.zyngier@arm.com> From: Christoffer Dall <christoffer.dall@arm.com> vcpu_read_sys_reg should not be modifying the VCPU structure. Eventually, to handle EL2 sysregs for nested virtualization, we will call vcpu_read_sys_reg from places that have a const vcpu pointer, which will complain about the lack of the const modifier on the read path. Signed-off-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/kvm/sys_regs.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 7a5035f9c5c3..c22e50ba3473 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -319,7 +319,7 @@ struct kvm_vcpu_arch { */ #define __vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) -u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg); +u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg); void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg); /* diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index ecbf67ccabf5..965c6f1706d6 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -76,7 +76,7 @@ static bool write_to_read_only(struct kvm_vcpu *vcpu, return false; } -u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg) +u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg) { if (!vcpu->arch.sysregs_loaded_on_cpu) goto immediate_read; -- 2.19.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2018-12-19 18:03 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-12-19 18:03 [GIT PULL] KVM/arm updates for 4.21 Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 01/28] arm64: KVM: Skip MMIO insn after emulation Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 02/28] arm64: KVM: Consistently advance singlestep when emulating instructions Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 03/28] KVM: arm/arm64: Fix VMID alloc race by reverting to lock-less Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 04/28] KVM: arm/arm64: Log PSTATE for unhandled sysregs Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 05/28] KVM: arm/arm64: vgic-v2: Set active_source to 0 when restoring state Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 06/28] KVM: arm/arm64: Share common code in user_mem_abort() Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 07/28] KVM: arm/arm64: Re-factor setting the Stage 2 entry to exec on fault Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 08/28] KVM: arm/arm64: Introduce helpers to manipulate page table entries Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 09/28] KVM: arm64: Support dirty page tracking for PUD hugepages Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 10/28] KVM: arm64: Support PUD hugepage in stage2_is_exec() Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 11/28] KVM: arm64: Support handling access faults for PUD hugepages Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 12/28] KVM: arm64: Update age handlers to support " Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 13/28] KVM: arm64: Add support for creating PUD hugepages at stage 2 Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 14/28] KVM: arm/arm64: vgic: Do not cond_resched_lock() with IRQs disabled Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 15/28] KVM: arm64: Clarify explanation of STAGE2_PGTABLE_LEVELS Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 16/28] KVM: arm/arm64: vgic: Cap SPIs to the VM-defined maximum Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 17/28] KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq() Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 18/28] KVM: arm/arm64: vgic: Consider priority and active state for pending irq Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 19/28] KVM: arm/arm64: Fixup the kvm_exit tracepoint Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 20/28] KVM: arm/arm64: Remove arch timer workqueue Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 21/28] KVM: arm/arm64: arch_timer: Simplify kvm_timer_vcpu_terminate Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier [this message] 2018-12-19 18:03 ` [PATCH 22/28] KVM: arm64: Make vcpu const in vcpu_read_sys_reg Marc Zyngier 2018-12-19 18:03 ` [PATCH 23/28] arm64: KVM: Add trapped system register access tracepoint Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 24/28] arm/arm64: KVM: vgic: Force VM halt when changing the active state of GICv3 PPIs/SGIs Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 25/28] KVM: arm/arm64: Fix unintended stage 2 PMD mappings Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 26/28] arm64: KVM: Avoid setting the upper 32 bits of VTCR_EL2 to 1 Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 27/28] arm/arm64: KVM: Add ARM_EXCEPTION_IS_TRAP macro Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 18:03 ` [PATCH 28/28] arm: KVM: Add S2_PMD_{MASK,SIZE} constants Marc Zyngier 2018-12-19 18:03 ` Marc Zyngier 2018-12-19 19:34 ` [GIT PULL] KVM/arm updates for 4.21 Paolo Bonzini 2018-12-19 19:34 ` Paolo Bonzini
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