From: Marc Zyngier <marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: Shannon Zhao <shannon.zhao@linaro.org> Subject: [PATCH v2 3/9] arm64: KVM: PMU: Inject UNDEF on non-privileged accesses Date: Mon, 27 Mar 2017 17:03:39 +0100 [thread overview] Message-ID: <20170327160345.12402-4-marc.zyngier@arm.com> (raw) In-Reply-To: <20170327160345.12402-1-marc.zyngier@arm.com> access_pminten() and access_pmuserenr() can only be accessed when the CPU is in a priviledged mode. If it is not, let's inject an UNDEF exception. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/kvm/sys_regs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index d98ce9a52291..5e3ce7890b35 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -709,8 +709,10 @@ static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, if (!kvm_arm_pmu_v3_ready(vcpu)) return trap_raz_wi(vcpu, p, r); - if (!vcpu_mode_priv(vcpu)) + if (!vcpu_mode_priv(vcpu)) { + kvm_inject_undefined(vcpu); return false; + } if (p->is_write) { u64 val = p->regval & mask; @@ -780,8 +782,10 @@ static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, return trap_raz_wi(vcpu, p, r); if (p->is_write) { - if (!vcpu_mode_priv(vcpu)) + if (!vcpu_mode_priv(vcpu)) { + kvm_inject_undefined(vcpu); return false; + } vcpu_sys_reg(vcpu, PMUSERENR_EL0) = p->regval & ARMV8_PMU_USERENR_MASK; -- 2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: marc.zyngier@arm.com (Marc Zyngier) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 3/9] arm64: KVM: PMU: Inject UNDEF on non-privileged accesses Date: Mon, 27 Mar 2017 17:03:39 +0100 [thread overview] Message-ID: <20170327160345.12402-4-marc.zyngier@arm.com> (raw) In-Reply-To: <20170327160345.12402-1-marc.zyngier@arm.com> access_pminten() and access_pmuserenr() can only be accessed when the CPU is in a priviledged mode. If it is not, let's inject an UNDEF exception. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm64/kvm/sys_regs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index d98ce9a52291..5e3ce7890b35 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -709,8 +709,10 @@ static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, if (!kvm_arm_pmu_v3_ready(vcpu)) return trap_raz_wi(vcpu, p, r); - if (!vcpu_mode_priv(vcpu)) + if (!vcpu_mode_priv(vcpu)) { + kvm_inject_undefined(vcpu); return false; + } if (p->is_write) { u64 val = p->regval & mask; @@ -780,8 +782,10 @@ static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, return trap_raz_wi(vcpu, p, r); if (p->is_write) { - if (!vcpu_mode_priv(vcpu)) + if (!vcpu_mode_priv(vcpu)) { + kvm_inject_undefined(vcpu); return false; + } vcpu_sys_reg(vcpu, PMUSERENR_EL0) = p->regval & ARMV8_PMU_USERENR_MASK; -- 2.11.0
next prev parent reply other threads:[~2017-03-27 16:03 UTC|newest] Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-03-27 16:03 [PATCH v2 0/9] arm64: KVM: Fix PMU exception generation Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-27 16:03 ` [PATCH v2 1/9] arm64: KVM: PMU: Refactor pmu_*_el0_disabled Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-27 17:03 ` Suzuki K Poulose 2017-03-27 17:03 ` Suzuki K Poulose 2017-03-27 17:11 ` Marc Zyngier 2017-03-27 17:11 ` Marc Zyngier 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 13:21 ` Marc Zyngier 2017-03-28 13:21 ` Marc Zyngier 2017-03-27 16:03 ` [PATCH v2 2/9] arm64: KVM: PMU: Inject UNDEF exception on illegal register access Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:44 ` Christoffer Dall 2017-03-28 12:44 ` Christoffer Dall 2017-03-27 16:03 ` Marc Zyngier [this message] 2017-03-27 16:03 ` [PATCH v2 3/9] arm64: KVM: PMU: Inject UNDEF on non-privileged accesses Marc Zyngier 2017-03-28 12:45 ` Christoffer Dall 2017-03-28 12:45 ` Christoffer Dall 2017-03-27 16:03 ` [PATCH v2 4/9] arm64: KVM: Make unexpected reads from WO registers inject an undef Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:45 ` Christoffer Dall 2017-03-28 12:45 ` Christoffer Dall 2017-03-27 16:03 ` [PATCH v2 5/9] arm64: KVM: PMU: Inject UNDEF on read access to PMSWINC_EL0 Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:45 ` Christoffer Dall 2017-03-28 12:45 ` Christoffer Dall 2017-03-27 16:03 ` [PATCH v2 6/9] arm64: KVM: Treat sysreg accessors returning false as successful Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:45 ` Christoffer Dall 2017-03-28 12:45 ` Christoffer Dall 2017-03-27 16:03 ` [PATCH v2 7/9] arm64: KVM: Do not corrupt registers on failed 64bit CP read Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 13:24 ` Marc Zyngier 2017-03-28 13:24 ` Marc Zyngier 2017-03-27 16:03 ` [PATCH v2 8/9] arm: KVM: Make unexpected register accesses inject an undef Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 12:46 ` Christoffer Dall 2017-03-27 16:03 ` [PATCH v2 9/9] arm: KVM: Treat CP15 accessors returning false as successful Marc Zyngier 2017-03-27 16:03 ` Marc Zyngier 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 12:46 ` Christoffer Dall 2017-03-28 13:37 ` [PATCH v2 0/9] arm64: KVM: Fix PMU exception generation Christoffer Dall 2017-03-28 13:37 ` Christoffer Dall
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