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arch: Move initial page table addresses to layout module

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These are part of RAM and are used as the initial page table entries for
booting the OS and firmware (identity mapping.)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2019-09-27 16:59:49 +01:00 committed by Sebastien Boeuf
parent 5ba61f6d5e
commit 1bc47507b7
2 changed files with 6 additions and 5 deletions
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5
arch/src/x86_64/layout.rs
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@ -29,6 +29,11 @@ pub const ZERO_PAGE_START: GuestAddress = GuestAddress(0x7000);
pub const BOOT_STACK_START: GuestAddress = GuestAddress(0x8000);
pub const BOOT_STACK_POINTER: GuestAddress = GuestAddress(0x8ff0);
// Initial pagetables.
pub const PML4_START: GuestAddress = GuestAddress(0x9000);
pub const PDPTE_START: GuestAddress = GuestAddress(0xa000);
pub const PDE_START: GuestAddress = GuestAddress(0xb000);
/// Kernel command line start address.
pub const CMDLINE_START: GuestAddress = GuestAddress(0x20000);
/// Kernel command line start address maximum size.

6
arch/src/x86_64/regs.rs
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@ -11,13 +11,9 @@ use super::gdt::{gdt_entry, kvm_segment_from_gdt};
use arch_gen::x86::msr_index;
use kvm_bindings::{kvm_fpu, kvm_msr_entry, kvm_msrs, kvm_regs, kvm_sregs};
use kvm_ioctls::VcpuFd;
use layout::{PDE_START, PDPTE_START, PML4_START};
use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestMemoryMmap};
// Initial pagetables.
const PML4_START: GuestAddress = GuestAddress(0x9000);
const PDPTE_START: GuestAddress = GuestAddress(0xa000);
const PDE_START: GuestAddress = GuestAddress(0xb000);
// MTRR constants
const MTRR_ENABLE: u64 = 0x800; // IA32_MTRR_DEF_TYPE MSR: E (MTRRs enabled) flag, bit 11
const MTRR_MEM_TYPE_WB: u64 = 0x6;