From: zhaoshenglong@huawei•com (Shannon Zhao)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 08/21] KVM: ARM64: Add reset and access handlers for PMXEVTYPER register
Date: Tue, 1 Dec 2015 10:42:30 +0800 [thread overview]
Message-ID: <565D0916.5030300@huawei.com> (raw)
In-Reply-To: <20151130181247.55649fc7@arm.com>
On 2015/12/1 2:12, Marc Zyngier wrote:
> On Fri, 30 Oct 2015 14:21:50 +0800
> Shannon Zhao <zhaoshenglong@huawei•com> wrote:
>
>> > From: Shannon Zhao <shannon.zhao@linaro•org>
>> >
>> > Since the reset value of PMXEVTYPER is UNKNOWN, use reset_unknown or
>> > reset_unknown_cp15 for its reset handler. Add access handler which
>> > emulates writing and reading PMXEVTYPER register. When writing to
>> > PMXEVTYPER, call kvm_pmu_set_counter_event_type to create a perf_event
>> > for the selected event type.
>> >
>> > Signed-off-by: Shannon Zhao <shannon.zhao@linaro•org>
>> > ---
>> > arch/arm64/kvm/sys_regs.c | 26 ++++++++++++++++++++++++--
>> > 1 file changed, 24 insertions(+), 2 deletions(-)
>> >
>> > diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
>> > index cb82b15..4e606ea 100644
>> > --- a/arch/arm64/kvm/sys_regs.c
>> > +++ b/arch/arm64/kvm/sys_regs.c
>> > @@ -491,6 +491,17 @@ static bool access_pmu_regs(struct kvm_vcpu *vcpu,
>> >
>> > if (p->is_write) {
>> > switch (r->reg) {
>> > + case PMXEVTYPER_EL0: {
>> > + val = vcpu_sys_reg(vcpu, PMSELR_EL0);
>> > + kvm_pmu_set_counter_event_type(vcpu,
>> > + *vcpu_reg(vcpu, p->Rt),
>> > + val);
> You are blindingly truncating 64bit values to u32. Is that intentional?
>
Yeah, the register PMXEVTYPER_EL0 and PMSELR_EL0 are all 32bit.
--
Shannon
next prev parent reply other threads:[~2015-12-01 2:42 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-30 6:21 [PATCH v4 00/21] KVM: ARM64: Add guest PMU support Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 01/21] ARM64: Move PMU register related defines to asm/pmu.h Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 02/21] KVM: ARM64: Define PMU data structure for each vcpu Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 03/21] KVM: ARM64: Add offset defines for PMU registers Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 04/21] KVM: ARM64: Add reset and access handlers for PMCR_EL0 register Shannon Zhao
2015-11-30 18:11 ` Marc Zyngier
2015-10-30 6:21 ` [PATCH v4 05/21] KVM: ARM64: Add reset and access handlers for PMSELR register Shannon Zhao
2015-11-02 20:06 ` Christopher Covington
2015-11-30 17:56 ` Marc Zyngier
2015-12-01 1:51 ` Shannon Zhao
2015-12-01 8:49 ` Marc Zyngier
2015-12-01 12:46 ` Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 06/21] KVM: ARM64: Add reset and access handlers for PMCEID0 and PMCEID1 register Shannon Zhao
2015-11-30 11:42 ` Marc Zyngier
2015-11-30 11:59 ` Shannon Zhao
2015-11-30 13:19 ` Marc Zyngier
2015-10-30 6:21 ` [PATCH v4 07/21] KVM: ARM64: PMU: Add perf event map and introduce perf event creating function Shannon Zhao
2015-11-02 20:13 ` Christopher Covington
2015-11-03 2:33 ` Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 08/21] KVM: ARM64: Add reset and access handlers for PMXEVTYPER register Shannon Zhao
2015-11-02 20:54 ` Christopher Covington
2015-11-03 2:41 ` Shannon Zhao
2015-11-30 18:12 ` Marc Zyngier
2015-12-01 2:42 ` Shannon Zhao [this message]
2015-10-30 6:21 ` [PATCH v4 09/21] KVM: ARM64: Add reset and access handlers for PMXEVCNTR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 10/21] KVM: ARM64: Add reset and access handlers for PMCCNTR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 11/21] KVM: ARM64: Add reset and access handlers for PMCNTENSET and PMCNTENCLR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 12/21] KVM: ARM64: Add reset and access handlers for PMINTENSET and PMINTENCLR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 13/21] KVM: ARM64: Add reset and access handlers for PMOVSSET and PMOVSCLR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 14/21] KVM: ARM64: Add reset and access handlers for PMUSERENR register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 15/21] KVM: ARM64: Add reset and access handlers for PMSWINC register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 16/21] KVM: ARM64: Add access handlers for PMEVCNTRn and PMEVTYPERn register Shannon Zhao
2015-10-30 6:21 ` [PATCH v4 17/21] KVM: ARM64: Add helper to handle PMCR register bits Shannon Zhao
2015-11-02 21:20 ` Christopher Covington
2015-10-30 6:22 ` [PATCH v4 18/21] KVM: ARM64: Add PMU overflow interrupt routing Shannon Zhao
2015-10-30 12:08 ` kbuild test robot
2015-10-31 2:06 ` Shannon Zhao
2015-11-30 18:22 ` Marc Zyngier
2015-12-01 14:35 ` Shannon Zhao
2015-12-01 14:50 ` Marc Zyngier
2015-12-01 15:13 ` Shannon Zhao
2015-12-01 15:41 ` Marc Zyngier
2015-12-01 16:26 ` Shannon Zhao
2015-12-01 16:57 ` Marc Zyngier
2015-12-02 2:40 ` Shannon Zhao
2015-12-02 8:45 ` Marc Zyngier
2015-12-02 9:49 ` Shannon Zhao
2015-12-02 10:22 ` Marc Zyngier
2015-12-02 16:27 ` Christoffer Dall
2015-10-30 6:22 ` [PATCH v4 19/21] KVM: ARM64: Reset PMU state when resetting vcpu Shannon Zhao
2015-10-30 6:22 ` [PATCH v4 20/21] KVM: ARM64: Free perf event of PMU when destroying vcpu Shannon Zhao
2015-10-30 6:22 ` [PATCH v4 21/21] KVM: ARM64: Add a new kvm ARM PMU device Shannon Zhao
2015-11-30 18:31 ` Marc Zyngier
2015-11-30 18:34 ` [PATCH v4 00/21] KVM: ARM64: Add guest PMU support Marc Zyngier
2015-12-01 1:52 ` Shannon Zhao
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