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[129.215.164.122]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a06d4a8150sm2199951f8f.7.2025.04.24.07.14.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Apr 2025 07:14:24 -0700 (PDT) From: Karim Manaouil To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Cc: Karim Manaouil , Alexander Graf , Alex Elder , Catalin Marinas , Fuad Tabba , Joey Gouly , Jonathan Corbet , Marc Zyngier , Mark Brown , Mark Rutland , Oliver Upton , Paolo Bonzini , Prakruthi Deepak Heragu , Quentin Perret , Rob Herring , Srinivas Kandagatla , Srivatsa Vaddagiri , Will Deacon , Haripranesh S , Carl van Schaik , Murali Nalajala , Sreenivasulu Chalamcharla , Trilok Soni , Stefan Schmidt , Elliot Berman Subject: [RFC PATCH 30/34] gunyah: Add RPC to set VM boot context Date: Thu, 24 Apr 2025 15:13:37 +0100 Message-Id: <20250424141341.841734-31-karim.manaouil@linaro.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250424141341.841734-1-karim.manaouil@linaro.org> References: <20250424141341.841734-1-karim.manaouil@linaro.org> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Elliot Berman The initial context of a the primary vCPU can be initialized by performing RM RPC calls. Signed-off-by: Elliot Berman Reviewed-by: Srivatsa Vaddagiri Signed-off-by: Karim Manaouil --- drivers/virt/gunyah/rsc_mgr_rpc.c | 32 +++++++++++++++++++++++++++++++ include/linux/gunyah_rsc_mgr.h | 2 ++ 2 files changed, 34 insertions(+) diff --git a/drivers/virt/gunyah/rsc_mgr_rpc.c b/drivers/virt/gunyah/rsc_mgr_rpc.c index 7fccd871cc0b..78c4d1d5d42a 100644 --- a/drivers/virt/gunyah/rsc_mgr_rpc.c +++ b/drivers/virt/gunyah/rsc_mgr_rpc.c @@ -106,6 +106,15 @@ struct gunyah_rm_vm_config_image_req { __le64 dtb_size; } __packed; +/* Call: VM_SET_BOOT_CONTEXT */ +struct gunyah_rm_vm_set_boot_context_req { + __le16 vmid; + u8 reg_set; + u8 reg_index; + __le32 _padding; + __le64 value; +} __packed; + /* Call: VM_SET_DEMAND_PAGING */ struct gunyah_rm_vm_set_demand_paging_req { __le16 vmid; @@ -447,6 +456,29 @@ int gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid) } ALLOW_ERROR_INJECTION(gunyah_rm_vm_init, ERRNO); +/** + * gunyah_rm_vm_set_boot_context() - set the initial boot context of the primary vCPU + * @rm: Handle to a Gunyah resource manager + * @vmid: VM identifier + * @reg_set: See &enum gunyah_vm_boot_context_reg + * @reg_index: Which register to set; must be 0 for REG_SET_PC + * @value: Value to set in the register + */ +int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set, + u8 reg_index, u64 value) +{ + struct gunyah_rm_vm_set_boot_context_req req_payload = { + .vmid = cpu_to_le16(vmid), + .reg_set = reg_set, + .reg_index = reg_index, + .value = cpu_to_le64(value), + }; + + return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_SET_BOOT_CONTEXT, + &req_payload, sizeof(req_payload), NULL, NULL); +} +ALLOW_ERROR_INJECTION(gunyah_rm_vm_set_boot_context, ERRNO); + /** * gunyah_rm_get_hyp_resources() - Retrieve hypervisor resources (capabilities) associated with a VM * @rm: Handle to a Gunyah resource manager diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index f16e64af9273..6a07fe25b0ba 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -126,6 +126,8 @@ int gunyah_rm_vm_configure(struct gunyah_rm *rm, u16 vmid, u32 mem_handle, u64 image_offset, u64 image_size, u64 dtb_offset, u64 dtb_size); int gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid); +int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set, + u8 reg_index, u64 value); struct gunyah_rm_hyp_resource { u8 type;