From: Elliot Berman <quic_eberman@quicinc.com>
To: Alex Elder <elder@linaro.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Murali Nalajal <quic_mnalajal@quicinc.com>,
Trilok Soni <quic_tsoni@quicinc.com>,
Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
Carl van Schaik <quic_cvanscha@quicinc.com>,
Philip Derrin <quic_pderrin@quicinc.com>,
Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>,
Jonathan Corbet <corbet@lwn.net>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
"Fuad Tabba" <tabba@google.com>,
Sean Christopherson <seanjc@google.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Cc: <linux-arm-msm@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <linux-mm@kvack.org>,
Elliot Berman <quic_eberman@quicinc.com>
Subject: [PATCH v17 14/35] virt: gunyah: Add hypercalls for running a vCPU
Date: Thu, 22 Feb 2024 15:16:37 -0800 [thread overview]
Message-ID: <20240222-gunyah-v17-14-1e9da6763d38@quicinc.com> (raw)
In-Reply-To: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com>
Add hypercall to donate CPU time to a vCPU.
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
---
arch/arm64/gunyah/gunyah_hypercall.c | 37 ++++++++++++++++++++++++++++++++++++
include/linux/gunyah.h | 35 ++++++++++++++++++++++++++++++++++
2 files changed, 72 insertions(+)
diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c
index 1302e128be6e9..fee21df42c176 100644
--- a/arch/arm64/gunyah/gunyah_hypercall.c
+++ b/arch/arm64/gunyah/gunyah_hypercall.c
@@ -39,6 +39,7 @@ EXPORT_SYMBOL_GPL(arch_is_gunyah_guest);
#define GUNYAH_HYPERCALL_HYP_IDENTIFY GUNYAH_HYPERCALL(0x8000)
#define GUNYAH_HYPERCALL_MSGQ_SEND GUNYAH_HYPERCALL(0x801B)
#define GUNYAH_HYPERCALL_MSGQ_RECV GUNYAH_HYPERCALL(0x801C)
+#define GUNYAH_HYPERCALL_VCPU_RUN GUNYAH_HYPERCALL(0x8065)
/* clang-format on */
/**
@@ -113,5 +114,41 @@ enum gunyah_error gunyah_hypercall_msgq_recv(u64 capid, void *buff, size_t size,
}
EXPORT_SYMBOL_GPL(gunyah_hypercall_msgq_recv);
+/**
+ * gunyah_hypercall_vcpu_run() - Donate CPU time to a vcpu
+ * @capid: capability ID of the vCPU to run
+ * @resume_data: Array of 3 state-specific resume data
+ * @resp: Filled reason why vCPU exited when return value is GUNYAH_ERROR_OK
+ *
+ * See also:
+ * https://github.com/quic/gunyah-hypervisor/blob/develop/docs/api/gunyah_api.md#run-a-proxy-scheduled-vcpu-thread
+ */
+enum gunyah_error
+gunyah_hypercall_vcpu_run(u64 capid, unsigned long *resume_data,
+ struct gunyah_hypercall_vcpu_run_resp *resp)
+{
+ struct arm_smccc_1_2_regs args = {
+ .a0 = GUNYAH_HYPERCALL_VCPU_RUN,
+ .a1 = capid,
+ .a2 = resume_data[0],
+ .a3 = resume_data[1],
+ .a4 = resume_data[2],
+ /* C language says this will be implictly zero. Gunyah requires 0, so be explicit */
+ .a5 = 0,
+ };
+ struct arm_smccc_1_2_regs res;
+
+ arm_smccc_1_2_hvc(&args, &res);
+ if (res.a0 == GUNYAH_ERROR_OK) {
+ resp->sized_state = res.a1;
+ resp->state_data[0] = res.a2;
+ resp->state_data[1] = res.a3;
+ resp->state_data[2] = res.a4;
+ }
+
+ return res.a0;
+}
+EXPORT_SYMBOL_GPL(gunyah_hypercall_vcpu_run);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls");
diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
index 18ecebf41a3ff..6c24544f38dc9 100644
--- a/include/linux/gunyah.h
+++ b/include/linux/gunyah.h
@@ -273,4 +273,39 @@ enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff,
enum gunyah_error gunyah_hypercall_msgq_recv(u64 capid, void *buff, size_t size,
size_t *recv_size, bool *ready);
+struct gunyah_hypercall_vcpu_run_resp {
+ union {
+ enum {
+ /* clang-format off */
+ /* VCPU is ready to run */
+ GUNYAH_VCPU_STATE_READY = 0,
+ /* VCPU is sleeping until an interrupt arrives */
+ GUNYAH_VCPU_STATE_EXPECTS_WAKEUP = 1,
+ /* VCPU is powered off */
+ GUNYAH_VCPU_STATE_POWERED_OFF = 2,
+ /* VCPU is blocked in EL2 for unspecified reason */
+ GUNYAH_VCPU_STATE_BLOCKED = 3,
+ /* VCPU has returned for MMIO READ */
+ GUNYAH_VCPU_ADDRSPACE_VMMIO_READ = 4,
+ /* VCPU has returned for MMIO WRITE */
+ GUNYAH_VCPU_ADDRSPACE_VMMIO_WRITE = 5,
+ /* VCPU blocked on fault where we can demand page */
+ GUNYAH_VCPU_ADDRSPACE_PAGE_FAULT = 7,
+ /* clang-format on */
+ } state;
+ u64 sized_state;
+ };
+ u64 state_data[3];
+};
+
+enum {
+ GUNYAH_ADDRSPACE_VMMIO_ACTION_EMULATE = 0,
+ GUNYAH_ADDRSPACE_VMMIO_ACTION_RETRY = 1,
+ GUNYAH_ADDRSPACE_VMMIO_ACTION_FAULT = 2,
+};
+
+enum gunyah_error
+gunyah_hypercall_vcpu_run(u64 capid, unsigned long *resume_data,
+ struct gunyah_hypercall_vcpu_run_resp *resp);
+
#endif
--
2.34.1
next prev parent reply other threads:[~2024-02-22 23:17 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 23:16 [PATCH v17 00/35] Drivers for Gunyah hypervisor Elliot Berman
2024-02-22 23:16 ` [PATCH v17 01/35] docs: gunyah: Introduce Gunyah Hypervisor Elliot Berman
2024-03-05 10:53 ` Pavan Kondeti
2024-03-07 15:37 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 02/35] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2024-02-22 23:16 ` [PATCH v17 03/35] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2024-02-22 23:16 ` [PATCH v17 04/35] virt: gunyah: Add hypercalls to identify Gunyah Elliot Berman
2024-02-22 23:16 ` [PATCH v17 05/35] virt: gunyah: Add hypervisor driver Elliot Berman
2024-02-23 21:10 ` Konrad Dybcio
2024-02-23 22:58 ` Elliot Berman
2024-02-23 23:46 ` Konrad Dybcio
2024-03-07 15:38 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 06/35] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2024-02-22 23:16 ` [PATCH v17 07/35] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2024-03-07 15:38 ` Srivatsa Vaddagiri
2024-03-07 16:41 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 08/35] gunyah: vm_mgr: Introduce basic VM Manager Elliot Berman
2024-03-07 15:39 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 09/35] gunyah: rsc_mgr: Add VM lifecycle RPC Elliot Berman
2024-03-07 15:39 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 10/35] gunyah: vm_mgr: Add VM start/stop Elliot Berman
2024-03-11 5:38 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 11/35] virt: gunyah: Translate gh_rm_hyp_resource into gunyah_resource Elliot Berman
2024-03-11 5:39 ` Srivatsa Vaddagiri
2024-03-11 17:19 ` Elliot Berman
2024-04-05 3:10 ` Pavan Kondeti
2024-04-05 15:18 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 12/35] virt: gunyah: Add resource tickets Elliot Berman
2024-03-11 5:38 ` Srivatsa Vaddagiri
2024-03-11 17:13 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 13/35] gunyah: vm_mgr: Add framework for VM Functions Elliot Berman
2024-03-13 9:20 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` Elliot Berman [this message]
2024-03-13 9:21 ` [PATCH v17 14/35] virt: gunyah: Add hypercalls for running a vCPU Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 15/35] virt: gunyah: Add proxy-scheduled vCPUs Elliot Berman
2024-03-13 9:21 ` Srivatsa Vaddagiri
2024-04-24 9:39 ` Srivatsa Vaddagiri
2024-04-24 17:01 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 16/35] gunyah: Add hypercalls for demand paging Elliot Berman
2024-03-13 15:35 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 17/35] gunyah: rsc_mgr: Add memory parcel RPC Elliot Berman
2024-03-14 14:02 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 18/35] mm/interval_tree: Export iter_first/iter_next Elliot Berman
2024-02-22 23:16 ` [PATCH v17 19/35] arch/mm: Export direct {un,}map functions Elliot Berman
2024-02-23 7:09 ` Christoph Hellwig
2024-02-24 0:37 ` Elliot Berman
2024-02-26 11:06 ` Christoph Hellwig
2024-02-26 11:53 ` David Hildenbrand
2024-02-26 17:27 ` Elliot Berman
2024-02-27 9:49 ` David Hildenbrand
2024-03-01 1:35 ` Elliot Berman
2024-03-04 13:10 ` Quentin Perret
2024-03-04 23:37 ` Elliot Berman
2024-03-05 15:30 ` Quentin Perret
2024-03-05 20:26 ` Elliot Berman
2024-03-06 12:05 ` Quentin Perret
2024-03-08 19:55 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 20/35] virt: gunyah: Add interfaces to map memory into guest address space Elliot Berman
2024-02-22 23:16 ` [PATCH v17 21/35] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Elliot Berman
2024-02-22 23:16 ` [PATCH v17 22/35] virt: gunyah: Add Qualcomm Gunyah platform ops Elliot Berman
2024-02-22 23:16 ` [PATCH v17 23/35] virt: gunyah: Implement guestmemfd Elliot Berman
2024-02-22 23:16 ` [PATCH v17 24/35] virt: gunyah: Add ioctl to bind guestmem to VMs Elliot Berman
2024-02-22 23:16 ` [PATCH v17 25/35] virt: gunyah: guestmem: Initialize RM mem parcels from guestmem Elliot Berman
2024-02-22 23:16 ` [PATCH v17 26/35] virt: gunyah: Share guest VM dtb configuration to Gunyah Elliot Berman
2024-02-22 23:16 ` [PATCH v17 27/35] gunyah: rsc_mgr: Add RPC to enable demand paging Elliot Berman
2024-02-22 23:16 ` [PATCH v17 28/35] virt: gunyah: Enable " Elliot Berman
2024-02-22 23:16 ` [PATCH v17 29/35] gunyah: rsc_mgr: Add RPC to set VM boot context Elliot Berman
2024-03-14 14:02 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 30/35] virt: gunyah: Allow userspace to initialize context of primary vCPU Elliot Berman
2024-03-14 14:03 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 31/35] virt: gunyah: Add hypercalls for sending doorbell Elliot Berman
2024-02-22 23:16 ` [PATCH v17 32/35] virt: gunyah: Add irqfd interface Elliot Berman
2024-02-22 23:16 ` [PATCH v17 33/35] virt: gunyah: Add IO handlers Elliot Berman
2024-02-22 23:16 ` [PATCH v17 34/35] virt: gunyah: Add ioeventfd Elliot Berman
2024-02-22 23:16 ` [PATCH v17 35/35] MAINTAINERS: Add Gunyah hypervisor drivers section Elliot Berman
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