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    Subject[RFC qemu 1/4] pc: Add code to get the lowmem form PCMachineState
    Date
    The lowmem will be used by the following patch to get
    a correct free pages bitmap.

    Signed-off-by: Liang Li <liang.z.li@intel.com>
    ---
    hw/i386/pc.c | 5 +++++
    hw/i386/pc_piix.c | 1 +
    hw/i386/pc_q35.c | 1 +
    include/hw/i386/pc.h | 3 ++-
    4 files changed, 9 insertions(+), 1 deletion(-)

    diff --git a/hw/i386/pc.c b/hw/i386/pc.c
    index 0aeefd2..f794a84 100644
    --- a/hw/i386/pc.c
    +++ b/hw/i386/pc.c
    @@ -1115,6 +1115,11 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
    object_unref(OBJECT(cpu));
    }

    +ram_addr_t pc_get_lowmem(PCMachineState *pcms)
    +{
    + return pcms->lowmem;
    +}
    +
    void pc_cpus_init(PCMachineState *pcms)
    {
    int i;
    diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
    index 6f8c2cd..268a08c 100644
    --- a/hw/i386/pc_piix.c
    +++ b/hw/i386/pc_piix.c
    @@ -113,6 +113,7 @@ static void pc_init1(MachineState *machine,
    }
    }

    + pcms->lowmem = lowmem;
    if (machine->ram_size >= lowmem) {
    pcms->above_4g_mem_size = machine->ram_size - lowmem;
    pcms->below_4g_mem_size = lowmem;
    diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
    index 46522c9..8d9bd39 100644
    --- a/hw/i386/pc_q35.c
    +++ b/hw/i386/pc_q35.c
    @@ -101,6 +101,7 @@ static void pc_q35_init(MachineState *machine)
    }
    }

    + pcms->lowmem = lowmem;
    if (machine->ram_size >= lowmem) {
    pcms->above_4g_mem_size = machine->ram_size - lowmem;
    pcms->below_4g_mem_size = lowmem;
    diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
    index 8b3546e..3694c91 100644
    --- a/include/hw/i386/pc.h
    +++ b/include/hw/i386/pc.h
    @@ -60,7 +60,7 @@ struct PCMachineState {
    bool nvdimm;

    /* RAM information (sizes, addresses, configuration): */
    - ram_addr_t below_4g_mem_size, above_4g_mem_size;
    + ram_addr_t below_4g_mem_size, above_4g_mem_size, lowmem;

    /* CPU and apic information: */
    bool apic_xrupt_override;
    @@ -229,6 +229,7 @@ void pc_hot_add_cpu(const int64_t id, Error **errp);
    void pc_acpi_init(const char *default_dsdt);

    void pc_guest_info_init(PCMachineState *pcms);
    +ram_addr_t pc_get_lowmem(PCMachineState *pcms);

    #define PCI_HOST_PROP_PCI_HOLE_START "pci-hole-start"
    #define PCI_HOST_PROP_PCI_HOLE_END "pci-hole-end"
    --
    1.8.3.1
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