From: Marc Zyngier <maz@kernel.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
kernel-team@android.com, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 03/11] KVM: arm64: Make kvm_skip_instr() and co private to HYP
Date: Tue, 27 Oct 2020 11:08:15 +0000 [thread overview]
Message-ID: <3ae9d792ea381ba42874ebe5f7c08347@kernel.org> (raw)
In-Reply-To: <a2b942e5-651b-4733-4332-98b33fc6689b@arm.com>
On 2020-10-27 10:55, Suzuki K Poulose wrote:
> On 10/26/20 1:34 PM, Marc Zyngier wrote:
>> In an effort to remove the vcpu PC manipulations from EL1 on nVHE
>> systems, move kvm_skip_instr() to be HYP-specific. EL1's intent
>> to increment PC post emulation is now signalled via a flag in the
>> vcpu structure.
>>
>> Signed-off-by: Marc Zyngier <maz@kernel.org>
[...]
>> +static inline void kvm_skip_instr(struct kvm_vcpu *vcpu)
>> +{
>> + if (vcpu_mode_is_32bit(vcpu)) {
>> + kvm_skip_instr32(vcpu);
>> + } else {
>> + *vcpu_pc(vcpu) += 4;
>> + *vcpu_cpsr(vcpu) &= ~PSR_BTYPE_MASK;
>> + }
>> +
>> + /* advance the singlestep state machine */
>> + *vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS;
>> +}
>> +
>> +/*
>> + * Skip an instruction which has been emulated at hyp while most
>> guest sysregs
>> + * are live.
>> + */
>> +static inline void __kvm_skip_instr(struct kvm_vcpu *vcpu)
>> +{
>> + *vcpu_pc(vcpu) = read_sysreg_el2(SYS_ELR);
>> + vcpu_gp_regs(vcpu)->pstate = read_sysreg_el2(SYS_SPSR);
>> +
>> + __kvm_skip_instr(vcpu);
>
> Did you mean kvm_skip_instr() instead ?
Damn. How embarrassing! Yes, of course. I should have thrown my TX1 at
it!
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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next prev parent reply other threads:[~2020-10-27 11:08 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 13:34 [PATCH 00/11] KVM: arm64: Move PC/ELR/SPSR/PSTATE updatess to EL2 Marc Zyngier
2020-10-26 13:34 ` [PATCH 01/11] KVM: arm64: Don't adjust PC on SError during SMC trap Marc Zyngier
2020-10-26 13:53 ` Mark Rutland
2020-10-26 14:08 ` Marc Zyngier
2020-10-26 14:22 ` Mark Rutland
2020-10-26 13:34 ` [PATCH 02/11] KVM: arm64: Move kvm_vcpu_trap_il_is32bit into kvm_skip_instr32() Marc Zyngier
2020-10-26 13:55 ` Mark Rutland
2020-10-26 13:34 ` [PATCH 03/11] KVM: arm64: Make kvm_skip_instr() and co private to HYP Marc Zyngier
2020-10-26 14:04 ` Mark Rutland
2020-10-27 16:17 ` Marc Zyngier
2020-10-27 10:55 ` Suzuki K Poulose
2020-10-27 11:08 ` Marc Zyngier [this message]
2020-10-26 13:34 ` [PATCH 04/11] KVM: arm64: Move PC rollback on SError " Marc Zyngier
2020-10-26 14:06 ` Mark Rutland
2020-10-27 14:56 ` James Morse
2020-10-27 14:59 ` Marc Zyngier
2020-10-26 13:34 ` [PATCH 05/11] KVM: arm64: Move VHE direct sysreg accessors into kvm_host.h Marc Zyngier
2020-10-26 14:07 ` Mark Rutland
2020-10-26 13:34 ` [PATCH 06/11] KVM: arm64: Add basic hooks for injecting exceptions from EL2 Marc Zyngier
2020-10-26 13:34 ` [PATCH 07/11] KVM: arm64: Inject AArch64 exceptions from HYP Marc Zyngier
2020-10-26 14:22 ` Mark Rutland
2020-10-27 16:21 ` Marc Zyngier
2020-10-27 17:41 ` James Morse
2020-10-27 18:49 ` Marc Zyngier
2020-10-26 13:34 ` [PATCH 08/11] KVM: arm64: Inject AArch32 " Marc Zyngier
2020-10-26 14:26 ` Mark Rutland
2020-10-27 17:41 ` James Morse
2020-10-27 19:21 ` Marc Zyngier
2020-10-28 19:20 ` James Morse
2020-10-28 20:24 ` Marc Zyngier
2020-10-26 13:34 ` [PATCH 09/11] KVM: arm64: Remove SPSR manipulation primitives Marc Zyngier
2020-10-26 14:30 ` Mark Rutland
2020-10-26 13:34 ` [PATCH 10/11] KVM: arm64: Consolidate exception injection Marc Zyngier
2020-10-26 13:34 ` [PATCH 11/11] KVM: arm64: Get rid of the AArch32 register mapping code Marc Zyngier
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