diff options
| author | Shuo Liu <shuo.a.liu@intel.com> | 2021-02-07 06:10:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-09 12:58:19 +0300 |
| commit | 2ad2aaee1bc9568d0c146463483d2c926ef20055 (patch) | |
| tree | 7dd2b2c147724a3dd4237f7d06b2a9f0774115eb /drivers/virt/acrn | |
| parent | 9c5137aedd112f78a968bdd2325de2ea06df46c0 (diff) | |
| download | linux-2ad2aaee1bc9568d0c146463483d2c926ef20055.tar.xz | |
virt: acrn: Introduce an ioctl to set vCPU registers state
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.
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>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210207031040.49576-8-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virt/acrn')
| -rw-r--r-- | drivers/virt/acrn/hsm.c | 34 | ||||
| -rw-r--r-- | drivers/virt/acrn/hypercall.h | 13 |
2 files changed, 46 insertions, 1 deletions
diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c index 5fd933471683..ee5cc7413239 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> @@ -46,7 +47,8 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd, { struct acrn_vm *vm = filp->private_data; struct acrn_vm_creation *vm_param; - int ret = 0; + struct acrn_vcpu_regs *cpu_regs; + int i, ret = 0; if (vm->vmid == ACRN_INVALID_VMID && cmd != ACRN_IOCTL_CREATE_VM) { dev_dbg(acrn_dev.this_device, @@ -100,6 +102,36 @@ 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); + + for (i = 0; i < ARRAY_SIZE(cpu_regs->reserved); i++) + if (cpu_regs->reserved[i]) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.reserved_32); i++) + if (cpu_regs->vcpu_regs.reserved_32[i]) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.reserved_64); i++) + if (cpu_regs->vcpu_regs.reserved_64[i]) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.gdt.reserved); i++) + if (cpu_regs->vcpu_regs.gdt.reserved[i] | + cpu_regs->vcpu_regs.idt.reserved[i]) + return -EINVAL; + + 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 */ |