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hypervisor: Re-order vCPU state for storing and restoring

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Some vCPU states such as MP_STATE can be modified while retrieving
other states. For this reason, it's important to follow a specific
order that will ensure a state won't be modified after it has been
saved. Comments about ordering requirements have been copied over
from Firecracker commit 57f4c7ca14a31c5536f188cacb669d2cad32b9ca.

This patch also set the previously saved VCPU_EVENTS, as this was
missing from the restore codepath.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2020-06-24 16:52:41 +02:00
committed by Rob Bradford
parent 2b8accf49a
commit e2b5c78dc5
3 changed files with 82 additions and 23 deletions
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2
vmm/src/seccomp_filters.rs
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@@ -63,6 +63,7 @@ const KVM_IRQFD: u64 = 0x4020_ae76;
const KVM_SET_CLOCK: u64 = 0x4030_ae7b;
const KVM_CREATE_PIT2: u64 = 0x4040_ae77;
const KVM_IOEVENTFD: u64 = 0x4040_ae79;
const KVM_SET_VCPU_EVENTS: u64 = 0x4040_aea0;
const KVM_ENABLE_CAP: u64 = 0x4068_aea3;
const KVM_SET_REGS: u64 = 0x4090_ae82;
const KVM_SET_SREGS: u64 = 0x4138_ae84;
@@ -154,6 +155,7 @@ fn create_vmm_ioctl_seccomp_rule() -> Result<Vec<SeccompRule>, Error> {
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_SREGS)?],
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_TSS_ADDR,)?],
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_USER_MEMORY_REGION,)?],
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_VCPU_EVENTS,)?],
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_XSAVE,)?],
and![Cond::new(1, ArgLen::DWORD, Eq, KVM_SET_XCRS,)?],
and![Cond::new(1, ArgLen::DWORD, Eq, SIOCGIFFLAGS)?],