From: Igor Mammedov <imammedo@redhat.com>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Eduardo Habkost <ehabkost@redhat.com>,
Sergio Lopez <slp@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org, Shannon Zhao <shannon.zhaosl@gmail.com>,
qemu-arm@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v3 14/22] microvm: use 2G split unconditionally
Date: Thu, 21 May 2020 11:14:36 +0200 [thread overview]
Message-ID: <20200521111436.5c742fde@redhat.com> (raw)
In-Reply-To: <20200520132003.9492-15-kraxel@redhat.com>
On Wed, 20 May 2020 15:19:55 +0200
Gerd Hoffmann <kraxel@redhat.com> wrote:
> Looks like the logiv was copied over from q35.
>
> q35 does this for backward compatibility, there is no reason to do this
> on microvm though. So split @ 2G unconditionally.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> ---
> hw/i386/microvm.c | 16 +---------------
> 1 file changed, 1 insertion(+), 15 deletions(-)
>
> diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
> index 867d3d652145..b8f0d3283758 100644
> --- a/hw/i386/microvm.c
> +++ b/hw/i386/microvm.c
> @@ -170,23 +170,9 @@ static void microvm_memory_init(MicrovmMachineState *mms)
> MemoryRegion *ram_below_4g, *ram_above_4g;
> MemoryRegion *system_memory = get_system_memory();
> FWCfgState *fw_cfg;
> - ram_addr_t lowmem;
> + ram_addr_t lowmem = 0x80000000; /* 2G */
> int i;
>
> - /*
> - * Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory
> - * and 256 Mbytes for PCI Express Enhanced Configuration Access Mapping
> - * also known as MMCFG).
> - * If it doesn't, we need to split it in chunks below and above 4G.
> - * In any case, try to make sure that guest addresses aligned at
> - * 1G boundaries get mapped to host addresses aligned at 1G boundaries.
> - */
> - if (machine->ram_size >= 0xb0000000) {
> - lowmem = 0x80000000;
> - } else {
> - lowmem = 0xb0000000;
> - }
> -
> /*
> * Handle the machine opt max-ram-below-4g. It is basically doing
> * min(qemu limit, user limit).
next prev parent reply other threads:[~2020-05-21 9:17 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 13:19 [PATCH v3 00/22] microvm: add acpi support Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 01/22] microvm: name qboot binary qboot.bin Gerd Hoffmann
2020-05-20 13:25 ` Philippe Mathieu-Daudé
2020-05-25 11:02 ` Gerd Hoffmann
2020-05-25 12:26 ` Philippe Mathieu-Daudé
2020-05-20 13:19 ` [PATCH v3 02/22] [testing] seabios: update submodule to master snapshot Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 03/22] [testing] seabios: update config & build rules Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 04/22] [testing] seabios: update binaries to master snapshot Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 05/22] acpi: make build_madt() more generic Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 06/22] acpi: create acpi-common.c and move madt code Gerd Hoffmann
2020-05-20 13:31 ` Philippe Mathieu-Daudé
2020-05-20 13:19 ` [PATCH v3 07/22] acpi: madt: skip pci override on pci-less systems Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 08/22] acpi: fadt: add hw-reduced sleep register support Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 09/22] acpi: ged: rename event memory region Gerd Hoffmann
2020-05-20 13:33 ` Philippe Mathieu-Daudé
2020-05-21 7:58 ` Igor Mammedow
2020-05-20 13:19 ` [PATCH v3 10/22] acpi: ged: add control regs Gerd Hoffmann
2020-05-21 8:58 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 11/22] acpi: ged: add x86 device variant Gerd Hoffmann
2020-05-21 9:01 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 12/22] acpi: move acpi_dsdt_add_power_button() to ged Gerd Hoffmann
2020-05-20 13:32 ` Philippe Mathieu-Daudé
2020-05-21 9:03 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 13/22] x86: coldplug cpus Gerd Hoffmann
2020-05-20 14:07 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 14/22] microvm: use 2G split unconditionally Gerd Hoffmann
2020-05-20 13:34 ` Philippe Mathieu-Daudé
2020-05-21 9:14 ` Igor Mammedov [this message]
2020-05-21 9:29 ` Igor Mammedov
2020-05-25 11:45 ` Gerd Hoffmann
2020-05-25 16:36 ` Igor Mammedov
2020-05-26 4:48 ` Gerd Hoffmann
2020-05-27 12:25 ` Igor Mammedov
2020-05-27 13:06 ` Paolo Bonzini
2020-05-27 14:26 ` Igor Mammedov
2020-05-27 14:35 ` Igor Mammedov
2020-05-27 14:54 ` Paolo Bonzini
2020-05-28 7:19 ` Gerd Hoffmann
2020-05-28 7:17 ` Gerd Hoffmann
2020-05-20 13:19 ` [PATCH v3 15/22] microvm: make virtio irq base runtime configurable Gerd Hoffmann
2020-05-20 13:29 ` Philippe Mathieu-Daudé
2020-05-25 11:49 ` Gerd Hoffmann
2020-05-25 12:27 ` Philippe Mathieu-Daudé
2020-05-20 13:19 ` [PATCH v3 16/22] microvm/acpi: add minimal acpi support Gerd Hoffmann
2020-05-21 10:09 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 17/22] microvm/acpi: add acpi_dsdt_add_virtio() for x86 Gerd Hoffmann
2020-05-21 10:12 ` Igor Mammedov
2020-05-20 13:19 ` [PATCH v3 18/22] microvm/acpi: use GSI 16-23 for virtio Gerd Hoffmann
2020-05-21 10:13 ` Igor Mammedov
2020-05-20 13:20 ` [PATCH v3 19/22] microvm/acpi: use seabios with acpi=on Gerd Hoffmann
2020-05-21 10:14 ` Igor Mammedov
2020-05-20 13:20 ` [PATCH v3 20/22] microvm/acpi: disable virtio-mmio cmdline hack Gerd Hoffmann
2020-05-20 13:20 ` [PATCH v3 21/22] [RfC] acpi: add per machine type acpi default Gerd Hoffmann
2020-05-21 10:26 ` Igor Mammedov
2020-05-20 13:20 ` [PATCH v3 22/22] [RfC] acpi: flip default to off for microvm Gerd Hoffmann
2020-05-21 10:36 ` Igor Mammedov
2020-05-25 12:11 ` Gerd Hoffmann
2020-05-20 15:46 ` [PATCH v3 00/22] microvm: add acpi support no-reply
2020-05-20 15:50 ` no-reply
2020-05-20 15:51 ` no-reply
2020-05-20 15:53 ` no-reply
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