update to zerocopy 0.8

Cargo.toml

@@ -44,7 +44,7 @@ log = "0.4.17"
 p384 = { version = "0.13.0" }
 uuid = "1.6.1"
 # Add the derive feature by default because all crates use it.
-zerocopy = { version = "0.7.32", features = ["derive"] }
+zerocopy = { version = "0.8.2", features = ["alloc", "derive"] }
 
 # other repos
 packit = { git = "https://github.com/coconut-svsm/packit", version = "0.1.1" }

bootlib/src/igvm_params.rs

@@ -7,12 +7,12 @@
 //! This crate provides definitions of IGVM parameters to be parsed by
 //! COCONUT-SVSM to determine its configuration.
 
-use zerocopy::AsBytes;
+use zerocopy::{Immutable, IntoBytes};
 
 /// The IGVM parameter page is an unmeasured page containing individual
 /// parameters that are provided by the host loader.
 #[repr(C, packed)]
-#[derive(AsBytes, Clone, Copy, Debug, Default)]
+#[derive(IntoBytes, Clone, Copy, Debug, Default)]
 pub struct IgvmParamPage {
     /// The number of vCPUs that are configured for the guest VM.
     pub cpu_count: u32,
@@ -26,7 +26,7 @@ pub struct IgvmParamPage {
 /// An entry that represents an area of pre-validated memory defined by the
 /// firmware in the IGVM file.
 #[repr(C, packed)]
-#[derive(AsBytes, Clone, Copy, Debug, Default)]
+#[derive(IntoBytes, Immutable, Clone, Copy, Debug, Default)]
 pub struct IgvmParamBlockFwMem {
     /// The base physical address of the prevalidated memory region.
     pub base: u32,
@@ -38,7 +38,7 @@ pub struct IgvmParamBlockFwMem {
 /// The portion of the IGVM parameter block that describes metadata about
 /// the firmware image embedded in the IGVM file.
 #[repr(C, packed)]
-#[derive(AsBytes, Clone, Copy, Debug, Default)]
+#[derive(IntoBytes, Immutable, Clone, Copy, Debug, Default)]
 pub struct IgvmParamBlockFwInfo {
     /// The guest physical address of the start of the guest firmware. The
     /// permissions on the pages in the firmware range are adjusted to the guest
@@ -88,7 +88,7 @@ pub struct IgvmParamBlockFwInfo {
 /// builder which describes where the additional IGVM parameter information
 /// has been placed into the guest address space.
 #[repr(C, packed)]
-#[derive(AsBytes, Clone, Copy, Debug, Default)]
+#[derive(IntoBytes, Immutable, Clone, Copy, Debug, Default)]
 pub struct IgvmParamBlock {
     /// The total size of the parameter area, beginning with the parameter
     /// block itself and including any additional parameter pages which follow.
@@ -145,7 +145,7 @@ pub struct IgvmParamBlock {
 /// The IGVM context page is a measured page that is used to specify the start
 /// context for the guest VMPL.  If present, it overrides the processor state
 /// initialized at reset.
-#[derive(AsBytes, Copy, Debug, Clone, Default)]
+#[derive(IntoBytes, Immutable, Copy, Debug, Clone, Default)]
 #[repr(C, packed)]
 pub struct IgvmGuestContext {
     pub cr0: u64,

bootlib/src/kernel_launch.rs

@@ -6,7 +6,7 @@
 
 use crate::platform::SvsmPlatformType;
 
-use zerocopy::AsBytes;
+use zerocopy::{Immutable, IntoBytes};
 
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
@@ -46,7 +46,7 @@ impl KernelLaunchInfo {
 // Stage 2 launch info from stage1
 // The layout has to match the order in which the parts are pushed to the stack
 // in stage1/stage1.S
-#[derive(AsBytes, Default, Debug, Clone, Copy)]
+#[derive(IntoBytes, Immutable, Default, Debug, Clone, Copy)]
 #[repr(C, packed)]
 pub struct Stage2LaunchInfo {
     // VTOM must be the first field.

cpuarch/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2021"
 
 [dependencies]
 bitfield-struct.workspace = true
+zerocopy.workspace = true
 
 [lints]
 workspace = true

cpuarch/src/vmsa.rs

@@ -4,14 +4,18 @@
 //
 // Author: Joerg Roedel <[email protected]>
 
+#![allow(non_camel_case_types)]
+
 use bitfield_struct::bitfield;
+use zerocopy::FromZeros;
 
 // AE Exitcodes
 // Table 15-35, AMD64 Architecture Programmer’s Manual, Vol. 2
 #[repr(u64)]
-#[derive(Clone, Copy, Default, Debug)]
-#[allow(dead_code, non_camel_case_types)]
+#[derive(Clone, Copy, Default, Debug, FromZeros)]
+#[allow(dead_code)]
 pub enum GuestVMExit {
+    CR0_READ = 0,
     MC = 0x52,
     INTR = 0x60,
     NMI = 0x61,
@@ -46,6 +50,7 @@ pub enum GuestVMExit {
 }
 
 #[bitfield(u64)]
+#[derive(FromZeros)]
 pub struct VIntrCtrl {
     pub v_tpr: u8,
     pub v_irq: bool,
@@ -92,6 +97,7 @@ impl VmsaEventType {
 }
 
 #[bitfield(u64)]
+#[derive(FromZeros)]
 pub struct VmsaEventInject {
     pub vector: u8,
     #[bits(3)]
@@ -104,7 +110,7 @@ pub struct VmsaEventInject {
 }
 
 #[repr(C, packed)]
-#[derive(Debug, Default, Clone, Copy)]
+#[derive(Debug, Default, Clone, Copy, FromZeros)]
 pub struct VMSASegment {
     pub selector: u16,
     pub flags: u16,
@@ -113,7 +119,7 @@ pub struct VMSASegment {
 }
 
 #[repr(C, packed)]
-#[derive(Debug)]
+#[derive(Debug, FromZeros)]
 pub struct VMSA {
     pub es: VMSASegment,
     pub cs: VMSASegment,

igvmbuilder/Cargo.toml

@@ -13,6 +13,7 @@ igvm_defs.workspace = true
 igvm.workspace = true
 uuid.workspace = true
 zerocopy.workspace = true
+zerocopy07 = { package = "zerocopy", version = "0.7" }
 
 [lints]
 workspace = true

igvmbuilder/src/cpuid.rs

@@ -9,10 +9,10 @@ use std::mem::size_of;
 
 use igvm::IgvmDirectiveHeader;
 use igvm_defs::{IgvmPageDataFlags, IgvmPageDataType, PAGE_SIZE_4K};
-use zerocopy::AsBytes;
+use zerocopy::{Immutable, IntoBytes};
 
 #[repr(C, packed(1))]
-#[derive(AsBytes, Copy, Clone, Default)]
+#[derive(IntoBytes, Immutable, Copy, Clone, Default)]
 struct SnpCpuidLeaf {
     eax_in: u32,
     ecx_in: u32,
@@ -56,7 +56,7 @@ impl SnpCpuidLeaf {
 }
 
 #[repr(C, packed(1))]
-#[derive(AsBytes)]
+#[derive(IntoBytes, Immutable)]
 pub struct SnpCpuidPage {
     count: u32,
     reserved: [u32; 3],

igvmbuilder/src/igvm_builder.rs

@@ -20,7 +20,7 @@ use igvm_defs::{
     IgvmNativeVpContextX64, IgvmPageDataFlags, IgvmPageDataType, IgvmPlatformType,
     IGVM_VHS_PARAMETER, IGVM_VHS_PARAMETER_INSERT, IGVM_VHS_SUPPORTED_PLATFORM, PAGE_SIZE_4K,
 };
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 use crate::cmd_options::{CmdOptions, Hypervisor};
 use crate::cpuid::SnpCpuidPage;

igvmbuilder/src/igvm_firmware.rs

@@ -15,7 +15,7 @@ use igvm_defs::{
     IgvmPageDataType, IgvmVariableHeaderType, IGVM_VHS_PARAMETER, IGVM_VHS_PARAMETER_INSERT,
     PAGE_SIZE_4K,
 };
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 use crate::firmware::Firmware;
 

igvmbuilder/src/stage2_stack.rs

@@ -10,7 +10,7 @@ use bootlib::kernel_launch::Stage2LaunchInfo;
 use bootlib::platform::SvsmPlatformType;
 use igvm::IgvmDirectiveHeader;
 use igvm_defs::{IgvmPageDataFlags, IgvmPageDataType, PAGE_SIZE_4K};
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 use crate::gpa_map::GpaMap;
 use crate::igvm_builder::{

igvmbuilder/src/vmsa.rs

@@ -7,7 +7,7 @@
 use igvm::snp_defs::{SevFeatures, SevVmsa};
 use igvm::IgvmDirectiveHeader;
 use igvm_defs::IgvmNativeVpContextX64;
-use zerocopy::FromZeroes;
+use zerocopy07::FromZeroes;
 
 use crate::cmd_options::SevExtraFeatures;
 

igvmmeasure/Cargo.toml

@@ -12,6 +12,8 @@ igvm.workspace = true
 igvm_defs.workspace = true
 p384.workspace = true
 zerocopy.workspace = true
+# igvm_defs still uses 0.7, so we need to import the zerocopy 0.7 traits to use them.
+zerocopy07 = { package = "zerocopy", version = "0.7" }
 
 [lints]
 workspace = true

igvmmeasure/src/id_block.rs

@@ -15,13 +15,14 @@ use p384::ecdsa::signature::Signer;
 use p384::ecdsa::{Signature, SigningKey};
 use p384::elliptic_curve::bigint::ArrayEncoding;
 use p384::{EncodedPoint, SecretKey};
-use zerocopy::{AsBytes, FromZeroes};
+use zerocopy::{Immutable, IntoBytes};
+use zerocopy07::FromZeroes;
 
 use crate::igvm_measure::IgvmMeasure;
 use crate::utils::{get_compatibility_mask, get_policy};
 
 #[repr(C, packed)]
-#[derive(AsBytes, Clone, Copy, Debug)]
+#[derive(IntoBytes, Immutable, Clone, Copy, Debug)]
 pub struct SevIdBlock {
     pub ld: [u8; 48],
     pub family_id: [u8; 16],

igvmmeasure/src/igvm_measure.rs

@@ -10,7 +10,7 @@ use igvm::snp_defs::SevVmsa;
 use igvm::{IgvmDirectiveHeader, IgvmFile};
 use igvm_defs::{IgvmPageDataFlags, IgvmPageDataType, IgvmPlatformType, PAGE_SIZE_4K};
 use sha2::{Digest, Sha256};
-use zerocopy::AsBytes;
+use zerocopy07::AsBytes;
 
 use crate::page_info::PageInfo;
 

igvmmeasure/src/main.rs

@@ -14,7 +14,7 @@ use igvm::IgvmFile;
 use igvm_defs::IgvmPlatformType;
 use igvm_measure::IgvmMeasure;
 use utils::get_compatibility_mask;
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 use crate::id_block::SevIdBlockBuilder;
 

igvmmeasure/src/page_info.rs

@@ -5,10 +5,10 @@
 // Author: Roy Hopkins <[email protected]>
 
 use sha2::{Digest, Sha384};
-use zerocopy::AsBytes;
+use zerocopy::{Immutable, IntoBytes};
 
 #[repr(u8)]
-#[derive(AsBytes, Debug, Copy, Clone)]
+#[derive(IntoBytes, Immutable, Debug, Copy, Clone)]
 pub enum PageType {
     Normal = 1,
     Vmsa = 2,
@@ -19,7 +19,7 @@ pub enum PageType {
 }
 
 #[repr(C, packed)]
-#[derive(AsBytes, Debug, Copy, Clone)]
+#[derive(IntoBytes, Immutable, Debug, Copy, Clone)]
 pub struct PageInfo {
     digest_cur: [u8; 48],
     contents: [u8; 48],