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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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hypervisor: mshv: make SoftTLB part of MshvEmulatorContext
This avoids code complexity down the line when we get around implementing Windows support. No functional change. Signed-off-by: Wei Liu <liuwe@microsoft.com>
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c27d6df233
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@ -128,38 +128,6 @@ impl hypervisor::Hypervisor for MshvHypervisor {
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}
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}
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}
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}
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#[derive(Clone)]
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// A software emulated TLB.
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// This is mostly used by the instruction emulator to cache gva to gpa translations
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// passed from the hypervisor.
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struct SoftTLB {
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addr_map: HashMap<u64, u64>,
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}
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impl SoftTLB {
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fn new() -> SoftTLB {
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SoftTLB {
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addr_map: HashMap::new(),
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}
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}
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// Adds a gva -> gpa mapping into the TLB.
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fn add_mapping(&mut self, gva: u64, gpa: u64) {
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*self.addr_map.entry(gva).or_insert(gpa) = gpa;
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}
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// Do the actual gva -> gpa translation
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fn translate(&self, gva: u64) -> Result<u64, PlatformError> {
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self.addr_map
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.get(&gva)
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.ok_or_else(|| PlatformError::UnmappedGVA(anyhow!("{:#?}", gva)))
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.map(|v| *v)
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// TODO Check if we could fallback to e.g. an hypercall for doing
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// the translation for us.
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}
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}
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#[allow(dead_code)]
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#[allow(dead_code)]
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/// Vcpu struct for Microsoft Hypervisor
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/// Vcpu struct for Microsoft Hypervisor
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pub struct MshvVcpu {
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pub struct MshvVcpu {
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@ -411,13 +379,11 @@ impl cpu::Vcpu for MshvVcpu {
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let mut context = MshvEmulatorContext {
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let mut context = MshvEmulatorContext {
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vcpu: self,
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vcpu: self,
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tlb: SoftTLB::new(),
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addr_map: HashMap::new(),
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};
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};
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// Add the GVA <-> GPA mapping.
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// Add the GVA <-> GPA mapping.
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context
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context.add_mapping(info.guest_virtual_address, info.guest_physical_address);
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.tlb
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.add_mapping(info.guest_virtual_address, info.guest_physical_address);
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// Create a new emulator.
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// Create a new emulator.
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let mut emul = Emulator::new(&mut context);
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let mut emul = Emulator::new(&mut context);
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@ -569,7 +535,25 @@ impl cpu::Vcpu for MshvVcpu {
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struct MshvEmulatorContext<'a> {
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struct MshvEmulatorContext<'a> {
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vcpu: &'a MshvVcpu,
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vcpu: &'a MshvVcpu,
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tlb: SoftTLB,
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addr_map: HashMap<u64, u64>,
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}
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impl<'a> MshvEmulatorContext<'a> {
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// Adds a gva -> gpa mapping into the TLB.
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fn add_mapping(&mut self, gva: u64, gpa: u64) {
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*self.addr_map.entry(gva).or_insert(gpa) = gpa;
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}
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// Do the actual gva -> gpa translation
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fn translate(&self, gva: u64) -> Result<u64, PlatformError> {
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self.addr_map
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.get(&gva)
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.ok_or_else(|| PlatformError::UnmappedGVA(anyhow!("{:#?}", gva)))
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.map(|v| *v)
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// TODO Check if we could fallback to e.g. an hypercall for doing
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// the translation for us.
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}
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}
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}
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/// Platform emulation for Hyper-V
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/// Platform emulation for Hyper-V
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@ -577,7 +561,7 @@ impl<'a> PlatformEmulator for MshvEmulatorContext<'a> {
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type CpuState = EmulatorCpuState;
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type CpuState = EmulatorCpuState;
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fn read_memory(&self, gva: u64, data: &mut [u8]) -> Result<(), PlatformError> {
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fn read_memory(&self, gva: u64, data: &mut [u8]) -> Result<(), PlatformError> {
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let gpa = self.tlb.translate(gva)?;
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let gpa = self.translate(gva)?;
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debug!(
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debug!(
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"mshv emulator: memory read {} bytes from [{:#x} -> {:#x}]",
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"mshv emulator: memory read {} bytes from [{:#x} -> {:#x}]",
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data.len(),
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data.len(),
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@ -597,7 +581,7 @@ impl<'a> PlatformEmulator for MshvEmulatorContext<'a> {
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}
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}
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fn write_memory(&mut self, gva: u64, data: &[u8]) -> Result<(), PlatformError> {
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fn write_memory(&mut self, gva: u64, data: &[u8]) -> Result<(), PlatformError> {
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let gpa = self.tlb.translate(gva)?;
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let gpa = self.translate(gva)?;
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debug!(
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debug!(
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"mshv emulator: memory write {} bytes at [{:#x} -> {:#x}]",
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"mshv emulator: memory write {} bytes at [{:#x} -> {:#x}]",
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data.len(),
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data.len(),
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@ -661,7 +645,7 @@ impl<'a> PlatformEmulator for MshvEmulatorContext<'a> {
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}
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}
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fn gva_to_gpa(&self, gva: u64) -> Result<u64, PlatformError> {
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fn gva_to_gpa(&self, gva: u64) -> Result<u64, PlatformError> {
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self.tlb.translate(gva)
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self.translate(gva)
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}
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}
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fn fetch(&self, _ip: u64, _instruction_bytes: &mut [u8]) -> Result<(), PlatformError> {
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fn fetch(&self, _ip: u64, _instruction_bytes: &mut [u8]) -> Result<(), PlatformError> {
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