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| author |   Shuo Liu <shuo.a.liu@intel.com> | 2021-02-07 11:10:30 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-09 10:58:19 +0100 |
| commit | 88f537d5e8ddc89c2622f4a2bc1eb28455e8339c (patch) | |
| tree | d9e1d3422babc5606dc6a8d4f5d7af1777660007 /drivers/virt/acrn/hypercall.h | |
| parent | virt: acrn: Introduce an ioctl to set vCPU registers state (diff) | |
| download | linux-dev-88f537d5e8ddc89c2622f4a2bc1eb28455e8339c.tar.xz linux-dev-88f537d5e8ddc89c2622f4a2bc1eb28455e8339c.zip | |
virt: acrn: Introduce EPT mapping management
The HSM provides hypervisor services to the ACRN userspace. While
launching a User VM, ACRN userspace needs to allocate memory and request
the ACRN Hypervisor to set up the EPT mapping for the VM.
A mapping cache is introduced for accelerating the translation between
the Service VM kernel virtual address and User VM physical address.
>From the perspective of the hypervisor, the types of GPA of User VM can be
listed as following:
1) RAM region, which is used by User VM as system ram.
2) MMIO region, which is recognized by User VM as MMIO. MMIO region is
used to be utilized for devices emulation.
Generally, User VM RAM regions mapping is set up before VM started and
is released in the User VM destruction. MMIO regions mapping may be set
and unset dynamically during User VM running.
To achieve this, ioctls ACRN_IOCTL_SET_MEMSEG and ACRN_IOCTL_UNSET_MEMSEG
are introduced in HSM.
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/20210207031040.49576-9-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virt/acrn/hypercall.h')
| -rw-r--r-- | drivers/virt/acrn/hypercall.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/virt/acrn/hypercall.h b/drivers/virt/acrn/hypercall.h index f29cfae08862..a1a70a071713 100644 --- a/drivers/virt/acrn/hypercall.h +++ b/drivers/virt/acrn/hypercall.h @@ -21,6 +21,9 @@ #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) +#define HC_ID_MEM_BASE 0x40UL +#define HC_VM_SET_MEMORY_REGIONS _HC_ID(HC_ID, HC_ID_MEM_BASE + 0x02) + /** * hcall_create_vm() - Create a User VM * @vminfo: Service VM GPA of info of User VM creation @@ -88,4 +91,15 @@ static inline long hcall_set_vcpu_regs(u64 vmid, u64 regs_state) return acrn_hypercall2(HC_SET_VCPU_REGS, vmid, regs_state); } +/** + * hcall_set_memory_regions() - Inform the hypervisor to set up EPT mappings + * @regions_pa: Service VM GPA of &struct vm_memory_region_batch + * + * Return: 0 on success, <0 on failure + */ +static inline long hcall_set_memory_regions(u64 regions_pa) +{ + return acrn_hypercall1(HC_VM_SET_MEMORY_REGIONS, regions_pa); +} + #endif /* __ACRN_HSM_HYPERCALL_H */ |