Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* rust: miscellaneous changes
* target/i386: small code generation improvements
* target/i386: various cleanups and fixes
* cpu: remove env->nr_cores

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# gpg: Signature made Fri 10 Jan 2025 17:34:48 EST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (38 commits)
  i386/cpu: Set and track CPUID_EXT3_CMP_LEG in env->features[FEAT_8000_0001_ECX]
  i386/cpu: Set up CPUID_HT in x86_cpu_expand_features() instead of cpu_x86_cpuid()
  cpu: Remove nr_cores from struct CPUState
  i386/cpu: Hoist check of CPUID_EXT3_TOPOEXT against threads_per_core
  i386/cpu: Track a X86CPUTopoInfo directly in CPUX86State
  i386/topology: Introduce helpers for various topology info of different level
  i386/topology: Update the comment of x86_apicid_from_topo_ids()
  i386/cpu: Drop cores_per_pkg in cpu_x86_cpuid()
  i386/cpu: Drop the variable smp_cores and smp_threads in x86_cpu_pre_plug()
  i386/cpu: Extract a common fucntion to setup value of MSR_CORE_THREAD_COUNT
  target/i386/kvm: Replace ARRAY_SIZE(msr_handlers) with KVM_MSR_FILTER_MAX_RANGES
  target/i386/kvm: Clean up error handling in kvm_arch_init()
  target/i386/kvm: Return -1 when kvm_msr_energy_thread_init() fails
  target/i386/kvm: Clean up return values of MSR filter related functions
  target/i386/confidential-guest: Fix comment of x86_confidential_guest_kvm_type()
  target/i386/kvm: Drop workaround for KVM_X86_DISABLE_EXITS_HTL typo
  target/i386/kvm: Only save/load kvmclock MSRs when kvmclock enabled
  target/i386/kvm: Remove local MSR_KVM_WALL_CLOCK and MSR_KVM_SYSTEM_TIME definitions
  target/i386/kvm: Add feature bit definitions for KVM CPUID
  i386/cpu: Mark avx10_version filtered when prefix is NULL
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Author: stefanhaRH

hw/core/cpu-common.c

@@ -243,7 +243,6 @@ static void cpu_common_initfn(Object *obj)
     cpu->cluster_index = UNASSIGNED_CLUSTER_INDEX;
     /* user-mode doesn't have configurable SMP topology */
     /* the default value is changed by qemu_init_vcpu() for system-mode */
-    cpu->nr_cores = 1;
     cpu->nr_threads = 1;
     cpu->cflags_next_tb = -1;
 

hw/i386/kvm/clock.c

@@ -27,7 +27,6 @@
 #include "qapi/error.h"
 
 #include <linux/kvm.h>
-#include "standard-headers/asm-x86/kvm_para.h"
 #include "qom/object.h"
 
 #define TYPE_KVM_CLOCK "kvmclock"
@@ -333,8 +332,8 @@ void kvmclock_create(bool create_always)
 
     assert(kvm_enabled());
     if (create_always ||
-        cpu->env.features[FEAT_KVM] & ((1ULL << KVM_FEATURE_CLOCKSOURCE) |
-                                       (1ULL << KVM_FEATURE_CLOCKSOURCE2))) {
+        cpu->env.features[FEAT_KVM] & (CPUID_KVM_CLOCK |
+                                       CPUID_KVM_CLOCK2)) {
         sysbus_create_simple(TYPE_KVM_CLOCK, -1, NULL);
     }
 }

hw/i386/x86-common.c

@@ -248,9 +248,7 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
     CPUX86State *env = &cpu->env;
     MachineState *ms = MACHINE(hotplug_dev);
     X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
-    unsigned int smp_cores = ms->smp.cores;
-    unsigned int smp_threads = ms->smp.threads;
-    X86CPUTopoInfo topo_info;
+    X86CPUTopoInfo *topo_info = &env->topo_info;
 
     if (!object_dynamic_cast(OBJECT(cpu), ms->cpu_type)) {
         error_setg(errp, "Invalid CPU type, expected cpu type: '%s'",
@@ -269,15 +267,13 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
         }
     }
 
-    init_topo_info(&topo_info, x86ms);
+    init_topo_info(topo_info, x86ms);
 
     if (ms->smp.modules > 1) {
-        env->nr_modules = ms->smp.modules;
         set_bit(CPU_TOPOLOGY_LEVEL_MODULE, env->avail_cpu_topo);
     }
 
     if (ms->smp.dies > 1) {
-        env->nr_dies = ms->smp.dies;
         set_bit(CPU_TOPOLOGY_LEVEL_DIE, env->avail_cpu_topo);
     }
 
@@ -329,17 +325,17 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
         if (cpu->core_id < 0) {
             error_setg(errp, "CPU core-id is not set");
             return;
-        } else if (cpu->core_id > (smp_cores - 1)) {
+        } else if (cpu->core_id > (ms->smp.cores - 1)) {
             error_setg(errp, "Invalid CPU core-id: %u must be in range 0:%u",
-                       cpu->core_id, smp_cores - 1);
+                       cpu->core_id, ms->smp.cores - 1);
             return;
         }
         if (cpu->thread_id < 0) {
             error_setg(errp, "CPU thread-id is not set");
             return;
-        } else if (cpu->thread_id > (smp_threads - 1)) {
+        } else if (cpu->thread_id > (ms->smp.threads - 1)) {
             error_setg(errp, "Invalid CPU thread-id: %u must be in range 0:%u",
-                       cpu->thread_id, smp_threads - 1);
+                       cpu->thread_id, ms->smp.threads - 1);
             return;
         }
 
@@ -348,12 +344,12 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
         topo_ids.module_id = cpu->module_id;
         topo_ids.core_id = cpu->core_id;
         topo_ids.smt_id = cpu->thread_id;
-        cpu->apic_id = x86_apicid_from_topo_ids(&topo_info, &topo_ids);
+        cpu->apic_id = x86_apicid_from_topo_ids(topo_info, &topo_ids);
     }
 
     cpu_slot = x86_find_cpu_slot(MACHINE(x86ms), cpu->apic_id, &idx);
     if (!cpu_slot) {
-        x86_topo_ids_from_apicid(cpu->apic_id, &topo_info, &topo_ids);
+        x86_topo_ids_from_apicid(cpu->apic_id, topo_info, &topo_ids);
 
         error_setg(errp,
             "Invalid CPU [socket: %u, die: %u, module: %u, core: %u, thread: %u]"
@@ -376,7 +372,7 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
     /* TODO: move socket_id/core_id/thread_id checks into x86_cpu_realizefn()
      * once -smp refactoring is complete and there will be CPU private
      * CPUState::nr_cores and CPUState::nr_threads fields instead of globals */
-    x86_topo_ids_from_apicid(cpu->apic_id, &topo_info, &topo_ids);
+    x86_topo_ids_from_apicid(cpu->apic_id, topo_info, &topo_ids);
     if (cpu->socket_id != -1 && cpu->socket_id != topo_ids.pkg_id) {
         error_setg(errp, "property socket-id: %u doesn't match set apic-id:"
             " 0x%x (socket-id: %u)", cpu->socket_id, cpu->apic_id,

include/hw/core/cpu.h

@@ -407,7 +407,6 @@ struct qemu_work_item;
  *   Under TCG this value is propagated to @tcg_cflags.
  *   See TranslationBlock::TCG CF_CLUSTER_MASK.
  * @tcg_cflags: Pre-computed cflags for this cpu.
- * @nr_cores: Number of cores within this CPU package.
  * @nr_threads: Number of threads within this CPU core.
  * @thread: Host thread details, only live once @created is #true
  * @sem: WIN32 only semaphore used only for qtest
@@ -466,7 +465,6 @@ struct CPUState {
     CPUClass *cc;
     /*< public >*/
 
-    int nr_cores;
     int nr_threads;
 
     struct QemuThread *thread;

include/hw/i386/topology.h

@@ -121,9 +121,10 @@ static inline unsigned apicid_pkg_offset(X86CPUTopoInfo *topo_info)
 }
 
 /*
- * Make APIC ID for the CPU based on Pkg_ID, Core_ID, SMT_ID
+ * Make APIC ID for the CPU based on topology and IDs of each topology level.
  *
- * The caller must make sure core_id < nr_cores and smt_id < nr_threads.
+ * The caller must make sure the ID of each level doesn't exceed the width of
+ * the level.
  */
 static inline apic_id_t x86_apicid_from_topo_ids(X86CPUTopoInfo *topo_info,
                                                  const X86CPUTopoIDs *topo_ids)
@@ -202,4 +203,29 @@ static inline bool x86_has_extended_topo(unsigned long *topo_bitmap)
            test_bit(CPU_TOPOLOGY_LEVEL_DIE, topo_bitmap);
 }
 
+static inline unsigned x86_module_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->modules_per_die * topo_info->dies_per_pkg;
+}
+
+static inline unsigned x86_cores_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->cores_per_module * x86_module_per_pkg(topo_info);
+}
+
+static inline unsigned x86_threads_per_pkg(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->threads_per_core * x86_cores_per_pkg(topo_info);
+}
+
+static inline unsigned x86_threads_per_module(X86CPUTopoInfo *topo_info)
+{
+    return topo_info->threads_per_core * topo_info->cores_per_module;
+}
+
+static inline unsigned x86_threads_per_die(X86CPUTopoInfo *topo_info)
+{
+    return x86_threads_per_module(topo_info) * topo_info->modules_per_die;
+}
+
 #endif /* HW_I386_TOPOLOGY_H */

rust/hw/char/pl011/src/device.rs

@@ -5,7 +5,7 @@
 use core::ptr::{addr_of_mut, NonNull};
 use std::{
     ffi::CStr,
-    os::raw::{c_int, c_uchar, c_uint, c_void},
+    os::raw::{c_int, c_uint, c_void},
 };
 
 use qemu_api::{
@@ -14,7 +14,7 @@ use qemu_api::{
     irq::InterruptSource,
     prelude::*,
     qdev::DeviceImpl,
-    qom::ObjectImpl,
+    qom::{ClassInitImpl, ObjectImpl, ParentField},
 };
 
 use crate::{
@@ -33,27 +33,20 @@ const FBRD_MASK: u32 = 0x3f;
 /// QEMU sourced constant.
 pub const PL011_FIFO_DEPTH: u32 = 16;
 
-#[derive(Clone, Copy, Debug)]
-enum DeviceId {
-    #[allow(dead_code)]
-    Arm = 0,
-    Luminary,
-}
+#[derive(Clone, Copy)]
+struct DeviceId(&'static [u8; 8]);
 
 impl std::ops::Index<hwaddr> for DeviceId {
-    type Output = c_uchar;
+    type Output = u8;
 
     fn index(&self, idx: hwaddr) -> &Self::Output {
-        match self {
-            Self::Arm => &Self::PL011_ID_ARM[idx as usize],
-            Self::Luminary => &Self::PL011_ID_LUMINARY[idx as usize],
-        }
+        &self.0[idx as usize]
     }
 }
 
 impl DeviceId {
-    const PL011_ID_ARM: [c_uchar; 8] = [0x11, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1];
-    const PL011_ID_LUMINARY: [c_uchar; 8] = [0x11, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1];
+    const ARM: Self = Self(&[0x11, 0x10, 0x14, 0x00, 0x0d, 0xf0, 0x05, 0xb1]);
+    const LUMINARY: Self = Self(&[0x11, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1]);
 }
 
 // FIFOs use 32-bit indices instead of usize, for compatibility with
@@ -86,7 +79,7 @@ impl std::ops::Index<u32> for Fifo {
 #[derive(Debug, qemu_api_macros::Object, qemu_api_macros::offsets)]
 /// PL011 Device Model in QEMU
 pub struct PL011State {
-    pub parent_obj: SysBusDevice,
+    pub parent_obj: ParentField<SysBusDevice>,
     pub iomem: MemoryRegion,
     #[doc(alias = "fr")]
     pub flags: registers::Flags,
@@ -126,21 +119,33 @@ pub struct PL011State {
     pub clock: NonNull<Clock>,
     #[doc(alias = "migrate_clk")]
     pub migrate_clock: bool,
-    /// The byte string that identifies the device.
-    device_id: DeviceId,
 }
 
 qom_isa!(PL011State : SysBusDevice, DeviceState, Object);
 
+pub struct PL011Class {
+    parent_class: <SysBusDevice as ObjectType>::Class,
+    /// The byte string that identifies the device.
+    device_id: DeviceId,
+}
+
 unsafe impl ObjectType for PL011State {
-    type Class = <SysBusDevice as ObjectType>::Class;
+    type Class = PL011Class;
     const TYPE_NAME: &'static CStr = crate::TYPE_PL011;
 }
 
+impl ClassInitImpl<PL011Class> for PL011State {
+    fn class_init(klass: &mut PL011Class) {
+        klass.device_id = DeviceId::ARM;
+        <Self as ClassInitImpl<SysBusDeviceClass>>::class_init(&mut klass.parent_class);
+    }
+}
+
 impl ObjectImpl for PL011State {
     type ParentType = SysBusDevice;
 
     const INSTANCE_INIT: Option<unsafe fn(&mut Self)> = Some(Self::init);
+    const INSTANCE_POST_INIT: Option<fn(&Self)> = Some(Self::post_init);
 }
 
 impl DeviceImpl for PL011State {
@@ -179,14 +184,6 @@ impl PL011State {
                 Self::TYPE_NAME.as_ptr(),
                 0x1000,
             );
-
-            let sbd: &mut SysBusDevice = self.upcast_mut();
-            sysbus_init_mmio(sbd, addr_of_mut!(self.iomem));
-        }
-
-        for irq in self.interrupts.iter() {
-            let sbd: &SysBusDevice = self.upcast();
-            sbd.init_irq(irq);
         }
 
         // SAFETY:
@@ -209,12 +206,20 @@ impl PL011State {
         }
     }
 
+    fn post_init(&self) {
+        self.init_mmio(&self.iomem);
+        for irq in self.interrupts.iter() {
+            self.init_irq(irq);
+        }
+    }
+
     pub fn read(&mut self, offset: hwaddr, _size: c_uint) -> std::ops::ControlFlow<u64, u64> {
         use RegisterOffset::*;
 
         let value = match RegisterOffset::try_from(offset) {
             Err(v) if (0x3f8..0x400).contains(&(v >> 2)) => {
-                u32::from(self.device_id[(offset - 0xfe0) >> 2])
+                let device_id = self.get_class().device_id;
+                u32::from(device_id[(offset - 0xfe0) >> 2])
             }
             Err(_) => {
                 // qemu_log_mask(LOG_GUEST_ERROR, "pl011_read: Bad offset 0x%x\n", (int)offset);
@@ -645,19 +650,13 @@ pub unsafe extern "C" fn pl011_create(
 #[derive(Debug, qemu_api_macros::Object)]
 /// PL011 Luminary device model.
 pub struct PL011Luminary {
-    parent_obj: PL011State,
+    parent_obj: ParentField<PL011State>,
 }
 
-impl PL011Luminary {
-    /// Initializes a pre-allocated, unitialized instance of `PL011Luminary`.
-    ///
-    /// # Safety
-    ///
-    /// We expect the FFI user of this function to pass a valid pointer, that
-    /// has the same size as [`PL011Luminary`]. We also expect the device is
-    /// readable/writeable from one thread at any time.
-    unsafe fn init(&mut self) {
-        self.parent_obj.device_id = DeviceId::Luminary;
+impl ClassInitImpl<PL011Class> for PL011Luminary {
+    fn class_init(klass: &mut PL011Class) {
+        klass.device_id = DeviceId::LUMINARY;
+        <Self as ClassInitImpl<SysBusDeviceClass>>::class_init(&mut klass.parent_class);
     }
 }
 
@@ -670,8 +669,6 @@ unsafe impl ObjectType for PL011Luminary {
 
 impl ObjectImpl for PL011Luminary {
     type ParentType = PL011State;
-
-    const INSTANCE_INIT: Option<unsafe fn(&mut Self)> = Some(Self::init);
 }
 
 impl DeviceImpl for PL011Luminary {}

rust/hw/char/pl011/src/lib.rs

@@ -45,7 +45,7 @@ pub const TYPE_PL011_LUMINARY: &::std::ffi::CStr = c_str!("pl011_luminary");
 #[doc(alias = "offset")]
 #[allow(non_camel_case_types)]
 #[repr(u64)]
-#[derive(Debug)]
+#[derive(Debug, qemu_api_macros::TryInto)]
 pub enum RegisterOffset {
     /// Data Register
     ///
@@ -102,32 +102,6 @@ pub enum RegisterOffset {
     //Reserved = 0x04C,
 }
 
-impl core::convert::TryFrom<u64> for RegisterOffset {
-    type Error = u64;
-
-    fn try_from(value: u64) -> Result<Self, Self::Error> {
-        macro_rules! case {
-            ($($discriminant:ident),*$(,)*) => {
-                /* check that matching on all macro arguments compiles, which means we are not
-                 * missing any enum value; if the type definition ever changes this will stop
-                 * compiling.
-                 */
-                const fn _assert_exhaustive(val: RegisterOffset) {
-                    match val {
-                        $(RegisterOffset::$discriminant => (),)*
-                    }
-                }
-
-                match value {
-                    $(x if x == Self::$discriminant as u64 => Ok(Self::$discriminant),)*
-                     _ => Err(value),
-                }
-            }
-        }
-        case! { DR, RSR, FR, FBRD, ILPR, IBRD, LCR_H, CR, FLS, IMSC, RIS, MIS, ICR, DMACR }
-    }
-}
-
 pub mod registers {
     //! Device registers exposed as typed structs which are backed by arbitrary
     //! integer bitmaps. [`Data`], [`Control`], [`LineControl`], etc.