From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 47A2E28F2; Fri, 27 Jan 2023 11:30:34 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CE14E1596; Fri, 27 Jan 2023 03:31:15 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.35.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A62613F64C; Fri, 27 Jan 2023 03:30:31 -0800 (PST) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev Subject: [RFC PATCH 20/28] KVM: arm64: Handle Realm PSCI requests Date: Fri, 27 Jan 2023 11:29:24 +0000 Message-Id: <20230127112932.38045-21-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112932.38045-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112932.38045-1-steven.price@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The RMM needs to be informed of the target REC when a PSCI call is made with an MPIDR argument. Signed-off-by: Steven Price --- arch/arm64/include/asm/kvm_rme.h | 1 + arch/arm64/kvm/psci.c | 23 +++++++++++++++++++++++ arch/arm64/kvm/rme.c | 13 +++++++++++++ 3 files changed, 37 insertions(+) diff --git a/arch/arm64/include/asm/kvm_rme.h b/arch/arm64/include/asm/kvm_rme.h index 303e4a5e5704..2254e28c855e 100644 --- a/arch/arm64/include/asm/kvm_rme.h +++ b/arch/arm64/include/asm/kvm_rme.h @@ -65,6 +65,7 @@ int realm_map_non_secure(struct realm *realm, int realm_set_ipa_state(struct kvm_vcpu *vcpu, unsigned long addr, unsigned long end, unsigned long ripas); +int realm_psci_complete(struct kvm_vcpu *calling, struct kvm_vcpu *target); #define RME_RTT_BLOCK_LEVEL 2 #define RME_RTT_MAX_LEVEL 3 diff --git a/arch/arm64/kvm/psci.c b/arch/arm64/kvm/psci.c index 7fbc4c1b9df0..e2061cab9b26 100644 --- a/arch/arm64/kvm/psci.c +++ b/arch/arm64/kvm/psci.c @@ -76,6 +76,10 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) */ if (!vcpu) return PSCI_RET_INVALID_PARAMS; + + if (vcpu_is_rec(vcpu)) + realm_psci_complete(source_vcpu, vcpu); + if (!kvm_arm_vcpu_stopped(vcpu)) { if (kvm_psci_version(source_vcpu) != KVM_ARM_PSCI_0_1) return PSCI_RET_ALREADY_ON; @@ -135,6 +139,25 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) /* Ignore other bits of target affinity */ target_affinity &= target_affinity_mask; + if (vcpu_is_rec(vcpu)) { + struct kvm_vcpu *target_vcpu; + + /* RMM supports only zero affinity level */ + if (lowest_affinity_level != 0) + return PSCI_RET_INVALID_PARAMS; + + target_vcpu = kvm_mpidr_to_vcpu(kvm, target_affinity); + if (!target_vcpu) + return PSCI_RET_INVALID_PARAMS; + + /* + * Provide the references of running and target RECs to the RMM + * so that the RMM can complete the PSCI request. + */ + realm_psci_complete(vcpu, target_vcpu); + return PSCI_RET_SUCCESS; + } + /* * If one or more VCPU matching target affinity are running * then ON else OFF diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c index 3d46191798e5..6ac50481a138 100644 --- a/arch/arm64/kvm/rme.c +++ b/arch/arm64/kvm/rme.c @@ -126,6 +126,19 @@ static void free_delegated_page(struct realm *realm, phys_addr_t phys) free_page((unsigned long)phys_to_virt(phys)); } +int realm_psci_complete(struct kvm_vcpu *calling, struct kvm_vcpu *target) +{ + int ret; + + ret = rmi_psci_complete(virt_to_phys(calling->arch.rec.rec_page), + virt_to_phys(target->arch.rec.rec_page)); + + if (ret) + return -EINVAL; + + return 0; +} + static void realm_destroy_undelegate_range(struct realm *realm, unsigned long ipa, unsigned long addr, -- 2.34.1