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x86_64 configure_vcpu handles image type

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Regardless of what image type crosvm is running, it must set the cpuid
since the cpuid is not set by software. This missing setting was
preventing uboot from jumping to the 64 bit kernel since it thought
the cpu was not long mode capable.

BUG=b:153027511
TEST=Booted cuttlefish with and without uboot

Change-Id: Ib8902b324532daf2a0e8ff462603207ff0c64bad
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2298171
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Ram Muthiah <rammuthiah@google.com>
This commit is contained in:
Ram Muthiah 2020-07-14 10:46:24 -07:00 committed by Commit Bot
parent 906b43c5c9
commit d7c1591e54
1 changed files with 28 additions and 27 deletions
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11
x86_64/src/lib.rs
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@ -371,7 +371,6 @@ impl arch::LinuxArch for X8664arch {
let mut vcpus = Vec::with_capacity(vcpu_count as usize);
for cpu_id in 0..vcpu_count {
let vcpu = Vcpu::new(cpu_id as libc::c_ulong, &kvm, &vm).map_err(Error::CreateVcpu)?;
if let VmImage::Kernel(_) = components.vm_image {
Self::configure_vcpu(
vm.get_memory(),
&kvm,
@ -379,8 +378,8 @@ impl arch::LinuxArch for X8664arch {
&vcpu,
cpu_id as u64,
vcpu_count as u64,
&components.vm_image,
)?;
}
vcpus.push(vcpu);
}
@ -941,13 +940,12 @@ impl X8664arch {
/// # Arguments
///
/// * `guest_mem` - The memory to be used by the guest.
/// * `kernel_load_offset` - Offset in bytes from `guest_mem` at which the
/// kernel starts.
/// * `kvm` - The /dev/kvm object that created vcpu.
/// * `vm` - The VM object associated with this VCPU.
/// * `vcpu` - The VCPU object to configure.
/// * `cpu_id` - The id of the given `vcpu`.
/// * `num_cpus` - Number of virtual CPUs the guest will have.
/// * `image_type` - Type of image being run on vcpu
fn configure_vcpu(
guest_mem: &GuestMemory,
kvm: &Kvm,
@ -955,9 +953,11 @@ impl X8664arch {
vcpu: &Vcpu,
cpu_id: u64,
num_cpus: u64,
image_type: &VmImage,
) -> Result<()> {
let kernel_load_addr = GuestAddress(KERNEL_START_OFFSET);
cpuid::setup_cpuid(kvm, vcpu, cpu_id, num_cpus).map_err(Error::SetupCpuid)?;
if let VmImage::Kernel(_) = image_type {
let kernel_load_addr = GuestAddress(KERNEL_START_OFFSET);
regs::setup_msrs(vcpu, END_ADDR_BEFORE_32BITS).map_err(Error::SetupMsrs)?;
let kernel_end = guest_mem
.checked_offset(kernel_load_addr, KERNEL_64BIT_ENTRY_OFFSET)
@ -972,6 +972,7 @@ impl X8664arch {
regs::setup_fpu(vcpu).map_err(Error::SetupFpu)?;
regs::setup_sregs(guest_mem, vcpu).map_err(Error::SetupSregs)?;
interrupts::set_lint(vcpu).map_err(Error::SetLint)?;
}
Ok(())
}
}