Commit Graph

531 Commits

Author SHA1 Message Date
Rob Bradford
6d6e290000 arch: Move APIC and IOAPIC addresses into layout
Move the addresses used for the APIC and IOAPIC into our new memory
layout module.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-27 11:48:30 -07:00
Rob Bradford
0e7a1fc923 arch, vmm: Start documenting major regions of RAM and reserved memory
Using the existing layout module start documenting the major regions of
RAM and those areas that are reserved. Some of the constants have also
been renamed to be more consistent and some functions that returned
constant variables have been replaced.

Future commits will move more constants into this file to make it the
canonical source of information about the memory layout.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-27 08:55:47 -07:00
Rob Bradford
ff1cb11946 arch: Use if-let notation
To keep updated clippy happy.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-27 08:05:56 -07:00
Rob Bradford
b488d4859b arch: x86_64: Fix E820 table for RAM
The last byte was missing from the E820 RAM area. This was due to the
function using the last address relative to the first address in the
range to calculate the size. This incorrectly calculated the size by
one. This produced incorrect E820 tables like this:

[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009ffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001ffffffe] usable

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-19 10:43:55 +01:00
Rob Bradford
f0360c92d9 arch: acpi: Set the upper device range based on RAM levels
After the 32-bit gap the memory is shared between the devices and the
RAM. Ensure that the ACPI tables correctly indicate where the RAM ends
and the device area starts by patching the precompiled tables. We get
the following valid output now from the PCI bus probing (8GiB guest)

[    0.317757] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7 window]
[    0.319035] pci_bus 0000:00: resource 5 [io  0x0d00-0xffff window]
[    0.320215] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
[    0.321431] pci_bus 0000:00: resource 7 [mem 0xc0000000-0xfebfffff window]
[    0.322613] pci_bus 0000:00: resource 8 [mem 0x240000000-0xfffffffff window]

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-19 10:43:55 +01:00
Rob Bradford
f9b0875a60 arch: acpi: Correct range for the 32-bit device hole
There was an off-by-error in the result making the hole one byte too
big and ending at an address too high.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-19 10:43:55 +01:00
Rob Bradford
eb60106159 arch: acpi: Correct starting length of MCFG table
The starting length of the MCFG table was too long resulting in the
kernel trying to get extra MCFG entries from the table that weren't
there resulting in the following error message from the kernel:

PCI: no memory for MCFG entries

The MCFG table also has an 8 bytes of padding at the start before the
table begins.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-18 06:27:59 +02:00
Rob Bradford
9661e8da5d build: Really make the acpi feature disableable
The command "cargo build --no-default-features" does not recursively
disable the default features across the workspace. Instead add an acpi
feature at the top-level, making it default, and then make that feature
conditional on all the crate acpi features.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-05 08:58:47 -07:00
Rob Bradford
9e764fc091 vmm, arch, devices: Put ACPI support behind a default feature
Put the ACPI support behind a feature and ensure that the code compiles
without that feature by adding an extra build to Travis.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
5a187ee2c2 x86_64/devices: acpi: Add support for ACPI shutdown & reboot
Add an I/O port "device" to handle requests from the kernel to shutdown
or trigger a reboot, borrowing an I/O used for ACPI on the Q35 platform.
The details of this I/O port are included in the FADT
(SLEEP_STATUS_REG/SLEEP_CONTROL_REG/RESET_REG) with the details of the
value to write in the FADT for reset (RESET_VALUE) and in the DSDT for
shutdown (S5 -> 0x05)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Sebastien Boeuf
011496bda0 arch: acpi: Fix legacy interrupt for serial device
The DSDT must declare the interrupt used by the serial device. This
helps the guest kernel matching the right interrupt to the 8250 serial
device. This is mandatory in case the IRQ routing is handled by ACPI, as
we must let ACPI know what do do with pin based interrupts.

One thing to notice, if we were using acpi=noirq from the kernel command
line, this would mean ACPI is not in charge of the IRQ routing, and the
device COM1 declaration would not be needed.

One additional requirement is to provide the appropriate interrupt
source override for the legacy ISA interrupts (0-15), which will give
the right information to the guest kernel about how to allocate the
associated IRQs.

Because we want to keep the MADT as simple as possible, and given that
our only device requiring pin based interrupt is the serial device, we
choose to only define the pin 4.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
2610f4353d arch: acpi: Only add ACPI COM1 device if serial is turned on
Only add the ACPI PNP device for the COM1 serial port if it is not
turned off with "--serial off"

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
15387cd96a arch: x86_64: acpi: Add DSDT table entries for PCI and COM1
Currently this has a hardcoded range from 32GiB to 64GiB for the 64-bit PCI
range. It should range from the top of ram to 64GiB.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
638bf0378c arch: x86_64: acpi: Generate MCFG table
The MCFG table contains some PCI configuration details in particular
details of where the enhanced configuration space is.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
98f81c36ec arch: x86_64: acpi: Generate MADT aka APIC table
This provides important APIC configuration details for the CPU. Even
though it duplicates some of the information already included in the
mptable it is necessary when booting with ACPI as the mptable is not
used.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
ee83c2d44e arch: x86_64: Generate basic ACPI tables
Generate very basic ACPI tables for HW reduced ACPI.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
26a210a83a arch: x86_64: Fix EBDA adddress
This was set to the MP table address rather than the start of the EBDA.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-19 16:04:34 +01:00
Sebastien Boeuf
658c076eb2 linters: Fix clippy issues
Latest clippy version complains about our existing code for the
following reasons:

- trait objects without an explicit `dyn` are deprecated
- `...` range patterns are deprecated
- lint `clippy::const_static_lifetime` has been renamed to
  `clippy::redundant_static_lifetimes`
- unnecessary `unsafe` block
- unneeded return statement

All these issues have been fixed through this patch, and rustfmt has
been run to cleanup potential formatting errors due to those changes.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-15 09:10:04 -07:00
Rob Bradford
513d2fdcf6 arch: x86_64: Update linux-loader crate
The linux-loader crate has been updated with a regnerated bootparams.rs
which has changed the API slightly. Update to the latest linux-loader
and adapt the code to reflect the changes:

* e820_map is renamed to e820_table (and all similar variables updated)
* e820entry is renamed to boot_e820_entry
* The E820 type constants are not no longer included

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-15 10:42:44 +02:00
Rob Bradford
ac950d9a97 build: Bulk update dependencies
Update all dependencies with "cargo upgrade" with the exception of
vmm-sys-utils which needs some extra porting work.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-02 15:22:37 +02:00
Sebastien Boeuf
8c4c162109 arch: x86_64: Set MTRR default memory type as WB
In the context of VFIO, we use Vt-d, which means we rely on an IOMMU.
Depending on the IOMMU capability, and in particular if it is not able
to perform SC (Snooping Control), the memory will not be tagged as WB
by KVM, but instead the vCPU will rely on its MTRR/PAT MSRs to find the
appropriate way of interact with specific memory regions.

Because when Vt-d is not involved KVM sets the memory as WB (write-back)
the VMM should set the memory default as WB. That's why this patch sets
the MSR MTRRdefType with the default memory type being WB.

One thing that it is worth noting is that we might have to specifically
create some UC (uncacheable) regions if we see some issues with the
ranges corresponding to the MMIO ranges that should trap.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-01 20:14:46 +02:00
Samuel Ortiz
fa41ddd94f arch: Add a Reserved memory region to the memory hole
We add a Reserved region type at the end of the memory hole to prevent
32-bit devices allocations to overlap with architectural address ranges
like IOAPIC, TSS or APIC ones.

Eventually we should remove that reserved range by allocating all the
architectural ranges before letting 32-bit devices use the memory hole.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-25 11:45:38 +01:00
Samuel Ortiz
299d887856 arch: Add SubRegion memory type
We want to be able to differentiate between memory regions that must be
managed separately from the main address space (e.g. the 32-bit memory
hole) and ones that are reserved (i.e. from which we don't want to allow
the VMM to allocate address ranges.

We are going to use a reserved memory region for restricting the 32-bit
memory hole from expanding beyond the IOAPIC and TSS addresses.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-25 11:45:38 +01:00
Sebastien Boeuf
f98a69f42e vm-allocator: Introduce an MMIO hole address allocator
With this new AddressAllocator as part of the SystemAllocator, the
VMM can now decide with finer granularity where to place memory.

By allocating the RAM and the hole into the MMIO address space, we
ensure that no memory will be allocated by accident where the RAM or
where the hole is.
And by creating the new MMIO hole address space, we create a subset
of the entire MMIO address space where we can place 32 bits BARs for
example.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-22 09:51:16 -07:00
Rob Bradford
18d52869c5 arch: x86_64: Make unit tests pass
With the adoption for rust-vmm linux-loader crate some small changes
were needed to update the unit tests to reflect this change:

* configure_system now takes an extra parameter
* the e820 entry structure comes from the linux-loader crate

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-07-16 17:09:05 +02:00
Rob Bradford
c4c8b9314d build: Switch over to using rust-vmm linux-loader crate
With everything now merged upstream we no longer need to rely on Cathy's
fork.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-06-13 11:28:20 +01:00
Cathy Zhang
429b53a672 vmm: Add bzimage loader support
VMM may load different format kernel image to start guest, we currently
only have elf loader support, so add bzimage loader support in case
that VMM would like to load bzimage.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-06-13 11:28:20 +01:00
Sebastien Boeuf
13a065d2cd dep: Rely on latest kvm-ioctls crate
In order to have access to the newly added signal_msi() function
from the kvm-ioctls crate, this commit updates the version of the
kvm-ioctls to the latest one.

Because set_user_memory_region() has been swtiched to "unsafe", we
also need to handle this small change in our cloud-hypervisor code
directly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-06 15:27:35 +01:00
Samuel Ortiz
9299502955 cloud-hypervisor: Switch to crates.io kvm-ioctls
Fixes: #15

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-15 05:59:08 +01:00
Samuel Ortiz
040ea5432d cloud-hypervisor: Add proper licensing
Add the BSD and Apache license.
Make all crosvm references point to the BSD license.
Add the right copyrights and identifier to our VMM code.
Add Intel copyright to the vm-virtio and pci crates.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-09 15:44:17 +02:00
Samuel Ortiz
b56b4ca834 cloud-hypervisor: Add the architecture crates
Both crates are based on Firecracker commit 9cdb5b2.
They are ported to the new memory model and tests have been fixed
accordingly.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-07 18:40:40 +02:00