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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>
57 lines
1.3 KiB
C
57 lines
1.3 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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* Copyright 2016 Google, Inc.
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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 QEMU_HAX_H
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#define QEMU_HAX_H
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#include "qemu-common.h"
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int hax_sync_vcpus(void);
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int hax_init_vcpu(CPUState *cpu);
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int hax_smp_cpu_exec(CPUState *cpu);
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int hax_populate_ram(uint64_t va, uint64_t size);
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void hax_cpu_synchronize_state(CPUState *cpu);
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void hax_cpu_synchronize_post_reset(CPUState *cpu);
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void hax_cpu_synchronize_post_init(CPUState *cpu);
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void hax_cpu_synchronize_pre_loadvm(CPUState *cpu);
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#ifdef CONFIG_HAX
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int hax_enabled(void);
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#include "hw/hw.h"
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#include "qemu/bitops.h"
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#include "exec/memory.h"
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int hax_vcpu_destroy(CPUState *cpu);
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void hax_raise_event(CPUState *cpu);
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void hax_reset_vcpu_state(void *opaque);
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#include "target/i386/hax-interface.h"
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#include "target/i386/hax-i386.h"
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#else /* CONFIG_HAX */
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#define hax_enabled() (0)
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#endif /* CONFIG_HAX */
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#endif /* QEMU_HAX_H */
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