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From: shuo.a.liu@intel.com
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Yu Wang <yu1.wang@intel.com>,
	Reinette Chatre <reinette.chatre@intel.com>,
	Shuo Liu <shuo.a.liu@intel.com>, Zhi Wang <zhi.a.wang@intel.com>,
	Zhenyu Wang <zhenyuw@linux.intel.com>
Subject: [PATCH v6 07/18] virt: acrn: Introduce an ioctl to set vCPU registers state
Date: Tue,  1 Dec 2020 17:38:42 +0800	[thread overview]
Message-ID: <20201201093853.12070-8-shuo.a.liu@intel.com> (raw)
In-Reply-To: <20201201093853.12070-1-shuo.a.liu@intel.com>

From: Shuo Liu <shuo.a.liu@intel.com>

A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state (e.g. giving a initial registers state to a virtual
BSP of a User VM).

HSM provides an ioctl ACRN_IOCTL_SET_VCPU_REGS to do the virtual CPU
registers state setting. The ioctl passes the registers state from ACRN
userspace to the hypervisor directly.

Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/virt/acrn/hsm.c       | 16 ++++++++
 drivers/virt/acrn/hypercall.h | 13 +++++++
 include/uapi/linux/acrn.h     | 69 +++++++++++++++++++++++++++++++++++
 3 files changed, 98 insertions(+)

diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c
index e618ac6aadaf..77c749fe1fc2 100644
--- a/drivers/virt/acrn/hsm.c
+++ b/drivers/virt/acrn/hsm.c
@@ -9,6 +9,7 @@
  *	Yakui Zhao <yakui.zhao@intel.com>
  */
 
+#include <linux/io.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -46,6 +47,7 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
 {
 	struct acrn_vm *vm = filp->private_data;
 	struct acrn_vm_creation *vm_param;
+	struct acrn_vcpu_regs *cpu_regs;
 	int ret = 0;
 
 	if (vm->vmid == ACRN_INVALID_VMID && cmd != ACRN_IOCTL_CREATE_VM) {
@@ -99,6 +101,20 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
 	case ACRN_IOCTL_DESTROY_VM:
 		ret = acrn_vm_destroy(vm);
 		break;
+	case ACRN_IOCTL_SET_VCPU_REGS:
+		cpu_regs = memdup_user((void __user *)ioctl_param,
+				       sizeof(struct acrn_vcpu_regs));
+		if (IS_ERR(cpu_regs))
+			return PTR_ERR(cpu_regs);
+
+		memset(cpu_regs->reserved, 0, sizeof(cpu_regs->reserved));
+		ret = hcall_set_vcpu_regs(vm->vmid, virt_to_phys(cpu_regs));
+		if (ret < 0)
+			dev_dbg(acrn_dev.this_device,
+				"Failed to set regs state of VM%u!\n",
+				vm->vmid);
+		kfree(cpu_regs);
+		break;
 	default:
 		dev_dbg(acrn_dev.this_device, "Unknown IOCTL 0x%x!\n", cmd);
 		ret = -ENOTTY;
diff --git a/drivers/virt/acrn/hypercall.h b/drivers/virt/acrn/hypercall.h
index 426b66cadb1f..f29cfae08862 100644
--- a/drivers/virt/acrn/hypercall.h
+++ b/drivers/virt/acrn/hypercall.h
@@ -19,6 +19,7 @@
 #define HC_START_VM			_HC_ID(HC_ID, HC_ID_VM_BASE + 0x02)
 #define HC_PAUSE_VM			_HC_ID(HC_ID, HC_ID_VM_BASE + 0x03)
 #define HC_RESET_VM			_HC_ID(HC_ID, HC_ID_VM_BASE + 0x05)
+#define HC_SET_VCPU_REGS		_HC_ID(HC_ID, HC_ID_VM_BASE + 0x06)
 
 /**
  * hcall_create_vm() - Create a User VM
@@ -75,4 +76,16 @@ static inline long hcall_reset_vm(u64 vmid)
 	return acrn_hypercall1(HC_RESET_VM, vmid);
 }
 
+/**
+ * hcall_set_vcpu_regs() - Set up registers of virtual CPU of a User VM
+ * @vmid:	User VM ID
+ * @regs_state:	Service VM GPA of registers state
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_set_vcpu_regs(u64 vmid, u64 regs_state)
+{
+	return acrn_hypercall2(HC_SET_VCPU_REGS, vmid, regs_state);
+}
+
 #endif /* __ACRN_HSM_HYPERCALL_H */
diff --git a/include/uapi/linux/acrn.h b/include/uapi/linux/acrn.h
index e1608b8a50a2..d5d66b93586e 100644
--- a/include/uapi/linux/acrn.h
+++ b/include/uapi/linux/acrn.h
@@ -35,6 +35,73 @@ struct acrn_vm_creation {
 	__u64	cpu_affinity;
 };
 
+struct acrn_gp_regs {
+	__le64	rax;
+	__le64	rcx;
+	__le64	rdx;
+	__le64	rbx;
+	__le64	rsp;
+	__le64	rbp;
+	__le64	rsi;
+	__le64	rdi;
+	__le64	r8;
+	__le64	r9;
+	__le64	r10;
+	__le64	r11;
+	__le64	r12;
+	__le64	r13;
+	__le64	r14;
+	__le64	r15;
+};
+
+struct acrn_descriptor_ptr {
+	__le16	limit;
+	__le64	base;
+	__le16	reserved[3];
+} __attribute__ ((__packed__));
+
+struct acrn_regs {
+	struct acrn_gp_regs		gprs;
+	struct acrn_descriptor_ptr	gdt;
+	struct acrn_descriptor_ptr	idt;
+
+	__le64				rip;
+	__le64				cs_base;
+	__le64				cr0;
+	__le64				cr4;
+	__le64				cr3;
+	__le64				ia32_efer;
+	__le64				rflags;
+	__le64				reserved_64[4];
+
+	__le32				cs_ar;
+	__le32				cs_limit;
+	__le32				reserved_32[3];
+
+	__le16				cs_sel;
+	__le16				ss_sel;
+	__le16				ds_sel;
+	__le16				es_sel;
+	__le16				fs_sel;
+	__le16				gs_sel;
+	__le16				ldt_sel;
+	__le16				tr_sel;
+};
+
+/**
+ * struct acrn_vcpu_regs - Info of vCPU registers state
+ * @vcpu_id:	vCPU ID
+ * @reserved:	Reserved and must be 0
+ * @vcpu_regs:	vCPU registers state
+ *
+ * This structure will be passed to hypervisor directly.
+ */
+struct acrn_vcpu_regs {
+	__u16			vcpu_id;
+	__u16			reserved[3];
+	struct acrn_regs	vcpu_regs;
+};
+
 /* The ioctl type, documented in ioctl-number.rst */
 #define ACRN_IOCTL_TYPE			0xA2
 
@@ -51,5 +118,7 @@ struct acrn_vm_creation {
 	_IO(ACRN_IOCTL_TYPE, 0x13)
 #define ACRN_IOCTL_RESET_VM		\
 	_IO(ACRN_IOCTL_TYPE, 0x15)
+#define ACRN_IOCTL_SET_VCPU_REGS	\
+	_IOW(ACRN_IOCTL_TYPE, 0x16, struct acrn_vcpu_regs)
 
 #endif /* _UAPI_ACRN_H */
-- 
2.28.0


  parent reply	other threads:[~2020-12-01  9:40 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-01  9:38 [PATCH v6 00/18] HSM driver for ACRN hypervisor shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 01/18] docs: acrn: Introduce ACRN shuo.a.liu
2020-12-08 11:52   ` Borislav Petkov
2020-12-09  1:36     ` Shuo A Liu
2020-12-01  9:38 ` [PATCH v6 02/18] x86/acrn: Introduce acrn_{setup, remove}_intr_handler() shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 03/18] x86/acrn: Introduce acrn_cpuid_base() and hypervisor feature bits shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 04/18] x86/acrn: Introduce hypercall interfaces shuo.a.liu
2020-12-30 17:33   ` Borislav Petkov
2021-01-06  7:52     ` Shuo A Liu
2020-12-01  9:38 ` [PATCH v6 05/18] virt: acrn: Introduce ACRN HSM basic driver shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 06/18] virt: acrn: Introduce VM management interfaces shuo.a.liu
2020-12-01 10:09   ` Greg Kroah-Hartman
2020-12-02  2:14     ` Shuo A Liu
2020-12-15  9:52       ` Shuo A Liu
2020-12-15 10:00         ` Greg Kroah-Hartman
2020-12-15 10:02           ` Shuo A Liu
2021-01-05 14:03             ` Greg Kroah-Hartman
2021-01-06  7:56               ` Shuo A Liu
2020-12-01  9:38 ` shuo.a.liu [this message]
2020-12-01  9:38 ` [PATCH v6 08/18] virt: acrn: Introduce EPT mapping management shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 09/18] virt: acrn: Introduce I/O request management shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 10/18] virt: acrn: Introduce PCI configuration space PIO accesses combiner shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 11/18] virt: acrn: Introduce interfaces for PCI device passthrough shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 12/18] virt: acrn: Introduce interrupt injection interfaces shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 13/18] virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 14/18] virt: acrn: Introduce I/O ranges operation interfaces shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 15/18] virt: acrn: Introduce ioeventfd shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 16/18] virt: acrn: Introduce irqfd shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 17/18] virt: acrn: Introduce an interface for Service VM to control vCPU shuo.a.liu
2020-12-01  9:38 ` [PATCH v6 18/18] sample/acrn: Introduce a sample of HSM ioctl interface usage shuo.a.liu

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