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Since HAX_VM_IOCTL_ALLOC_RAM takes a 32-bit size, it cannot handle RAM blocks of 4GB or larger, which is why HAXM can only run guests with less than 4GB of RAM. Solve this problem by utilizing the new HAXM API, HAX_VM_IOCTL_ADD_RAMBLOCK, which takes a 64-bit size, to register RAM blocks with the HAXM kernel module. The new API is first added in HAXM 7.0.0, and its availablility and be confirmed by the presence of the HAX_CAP_64BIT_RAMBLOCK capability flag. When the guest RAM size reaches 7GB, QEMU will ask HAXM to set up a memory mapping that covers a 4GB region, which will fail, because HAX_VM_IOCTL_SET_RAM also takes a 32-bit size. Work around this limitation by splitting the large mapping into small ones and calling HAX_VM_IOCTL_SET_RAM multiple times. Bug: https://bugs.launchpad.net/qemu/+bug/1735576 Signed-off-by: Yu Ning <yu.ning@intel.com> Message-Id: <1515752555-12784-1-git-send-email-yu.ning@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
87 lines
3.5 KiB
C
87 lines
3.5 KiB
C
/*
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* QEMU HAXM support
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* Copyright (c) 2011 Intel Corporation
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* Written by:
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* Jiang Yunhong<yunhong.jiang@intel.com>
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* Xin Xiaohui<xiaohui.xin@intel.com>
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* Zhang Xiantao<xiantao.zhang@intel.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef TARGET_I386_HAX_WINDOWS_H
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#define TARGET_I386_HAX_WINDOWS_H
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#include <winioctl.h>
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#include <windef.h>
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#define HAX_INVALID_FD INVALID_HANDLE_VALUE
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static inline void hax_mod_close(struct hax_state *hax)
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{
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CloseHandle(hax->fd);
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}
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static inline void hax_close_fd(hax_fd fd)
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{
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CloseHandle(fd);
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}
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static inline int hax_invalid_fd(hax_fd fd)
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{
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return (fd == INVALID_HANDLE_VALUE);
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}
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#define HAX_DEVICE_TYPE 0x4000
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#define HAX_IOCTL_VERSION CTL_CODE(HAX_DEVICE_TYPE, 0x900, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_IOCTL_CREATE_VM CTL_CODE(HAX_DEVICE_TYPE, 0x901, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_IOCTL_CAPABILITY CTL_CODE(HAX_DEVICE_TYPE, 0x910, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_VCPU_CREATE CTL_CODE(HAX_DEVICE_TYPE, 0x902, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_ALLOC_RAM CTL_CODE(HAX_DEVICE_TYPE, 0x903, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_SET_RAM CTL_CODE(HAX_DEVICE_TYPE, 0x904, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_VCPU_DESTROY CTL_CODE(HAX_DEVICE_TYPE, 0x905, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_ADD_RAMBLOCK CTL_CODE(HAX_DEVICE_TYPE, 0x913, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_RUN CTL_CODE(HAX_DEVICE_TYPE, 0x906, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_SET_MSRS CTL_CODE(HAX_DEVICE_TYPE, 0x907, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_GET_MSRS CTL_CODE(HAX_DEVICE_TYPE, 0x908, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_SET_FPU CTL_CODE(HAX_DEVICE_TYPE, 0x909, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_GET_FPU CTL_CODE(HAX_DEVICE_TYPE, 0x90a, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_SETUP_TUNNEL CTL_CODE(HAX_DEVICE_TYPE, 0x90b, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_IOCTL_INTERRUPT CTL_CODE(HAX_DEVICE_TYPE, 0x90c, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_SET_REGS CTL_CODE(HAX_DEVICE_TYPE, 0x90d, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VCPU_GET_REGS CTL_CODE(HAX_DEVICE_TYPE, 0x90e, \
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METHOD_BUFFERED, FILE_ANY_ACCESS)
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#define HAX_VM_IOCTL_NOTIFY_QEMU_VERSION CTL_CODE(HAX_DEVICE_TYPE, 0x910, \
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METHOD_BUFFERED, \
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FILE_ANY_ACCESS)
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#endif /* TARGET_I386_HAX_WINDOWS_H */
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