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authorLinus Torvalds <torvalds@linux-foundation.org>2023-05-01 22:06:20 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-05-01 22:06:20 +0300
commitc8c655c34e33544aec9d64b660872ab33c29b5f1 (patch)
tree4aad88f698f04cef9e5d9d573a6df6283085dadd /virt/kvm
parentd75439d64a1e2b35e0f08906205b00279753cbed (diff)
parentb3c98052d46948a8d65d2778c7f306ff38366aac (diff)
downloadlinux-c8c655c34e33544aec9d64b660872ab33c29b5f1.tar.xz
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini: "s390: - More phys_to_virt conversions - Improvement of AP management for VSIE (nested virtualization) ARM64: - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements. x86: - Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled, and by giving the guest control of CR0.WP when EPT is enabled on VMX (VMX-only because SVM doesn't support per-bit controls) - Add CR0/CR4 helpers to query single bits, and clean up related code where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return as a bool - Move AMD_PSFD to cpufeatures.h and purge KVM's definition - Avoid unnecessary writes+flushes when the guest is only adding new PTEs - Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations when emulating invalidations - Clean up the range-based flushing APIs - Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle changed SPTE" overhead associated with writing the entire entry - Track the number of "tail" entries in a pte_list_desc to avoid having to walk (potentially) all descriptors during insertion and deletion, which gets quite expensive if the guest is spamming fork() - Disallow virtualizing legacy LBRs if architectural LBRs are available, the two are mutually exclusive in hardware - Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features - Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES - Apply PMU filters to emulated events and add test coverage to the pmu_event_filter selftest - AMD SVM: - Add support for virtual NMIs - Fixes for edge cases related to virtual interrupts - Intel AMX: - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() - Fix a bug in emulation of ENCLS in compatibility mode - Allow emulation of NOP and PAUSE for L2 - AMX selftests improvements - Misc cleanups MIPS: - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) Generic: - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole Documentation: - Fix goof introduced by the conversion to rST" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits) KVM: s390: pci: fix virtual-physical confusion on module unload/load KVM: s390: vsie: clarifications on setting the APCB KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init() KVM: selftests: Test the PMU event "Instructions retired" KVM: selftests: Copy full counter values from guest in PMU event filter test KVM: selftests: Use error codes to signal errors in PMU event filter test KVM: selftests: Print detailed info in PMU event filter asserts KVM: selftests: Add helpers for PMC asserts in PMU event filter test KVM: selftests: Add a common helper for the PMU event filter guest code KVM: selftests: Fix spelling mistake "perrmited" -> "permitted" KVM: arm64: vhe: Drop extra isb() on guest exit KVM: arm64: vhe: Synchronise with page table walker on MMU update KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc() KVM: arm64: nvhe: Synchronise with page table walker on TLBI KVM: arm64: Handle 32bit CNTPCTSS traps KVM: arm64: nvhe: Synchronise with page table walker on vcpu run KVM: arm64: vgic: Don't acquire its_lock before config_lock KVM: selftests: Add test to verify KVM's supported XCR0 ...
Diffstat (limited to 'virt/kvm')
-rw-r--r--virt/kvm/kvm_main.c30
1 files changed, 14 insertions, 16 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 537f33ac49de..cb5c13eee193 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1301,7 +1301,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
* At this point, pending calls to invalidate_range_start()
* have completed but no more MMU notifiers will run, so
* mn_active_invalidate_count may remain unbalanced.
- * No threads can be waiting in install_new_memslots as the
+ * No threads can be waiting in kvm_swap_active_memslots() as the
* last reference on KVM has been dropped, but freeing
* memslots would deadlock without this manual intervention.
*/
@@ -1745,13 +1745,13 @@ static void kvm_invalidate_memslot(struct kvm *kvm,
kvm_arch_flush_shadow_memslot(kvm, old);
kvm_arch_guest_memory_reclaimed(kvm);
- /* Was released by kvm_swap_active_memslots, reacquire. */
+ /* Was released by kvm_swap_active_memslots(), reacquire. */
mutex_lock(&kvm->slots_arch_lock);
/*
* Copy the arch-specific field of the newly-installed slot back to the
* old slot as the arch data could have changed between releasing
- * slots_arch_lock in install_new_memslots() and re-acquiring the lock
+ * slots_arch_lock in kvm_swap_active_memslots() and re-acquiring the lock
* above. Writers are required to retrieve memslots *after* acquiring
* slots_arch_lock, thus the active slot's data is guaranteed to be fresh.
*/
@@ -1813,11 +1813,11 @@ static int kvm_set_memslot(struct kvm *kvm,
int r;
/*
- * Released in kvm_swap_active_memslots.
+ * Released in kvm_swap_active_memslots().
*
- * Must be held from before the current memslots are copied until
- * after the new memslots are installed with rcu_assign_pointer,
- * then released before the synchronize srcu in kvm_swap_active_memslots.
+ * Must be held from before the current memslots are copied until after
+ * the new memslots are installed with rcu_assign_pointer, then
+ * released before the synchronize srcu in kvm_swap_active_memslots().
*
* When modifying memslots outside of the slots_lock, must be held
* before reading the pointer to the current memslots until after all
@@ -3869,7 +3869,7 @@ static int create_vcpu_fd(struct kvm_vcpu *vcpu)
#ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
static int vcpu_get_pid(void *data, u64 *val)
{
- struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
+ struct kvm_vcpu *vcpu = data;
*val = pid_nr(rcu_access_pointer(vcpu->pid));
return 0;
}
@@ -4470,7 +4470,7 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
return 0;
}
-static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
+static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
{
switch (arg) {
case KVM_CAP_USER_MEMORY:
@@ -5047,7 +5047,7 @@ put_fd:
static long kvm_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
- long r = -EINVAL;
+ int r = -EINVAL;
switch (ioctl) {
case KVM_GET_API_VERSION:
@@ -5574,8 +5574,7 @@ static int kvm_debugfs_open(struct inode *inode, struct file *file,
const char *fmt)
{
int ret;
- struct kvm_stat_data *stat_data = (struct kvm_stat_data *)
- inode->i_private;
+ struct kvm_stat_data *stat_data = inode->i_private;
/*
* The debugfs files are a reference to the kvm struct which
@@ -5596,8 +5595,7 @@ static int kvm_debugfs_open(struct inode *inode, struct file *file,
static int kvm_debugfs_release(struct inode *inode, struct file *file)
{
- struct kvm_stat_data *stat_data = (struct kvm_stat_data *)
- inode->i_private;
+ struct kvm_stat_data *stat_data = inode->i_private;
simple_attr_release(inode, file);
kvm_put_kvm(stat_data->kvm);
@@ -5646,7 +5644,7 @@ static int kvm_clear_stat_per_vcpu(struct kvm *kvm, size_t offset)
static int kvm_stat_data_get(void *data, u64 *val)
{
int r = -EFAULT;
- struct kvm_stat_data *stat_data = (struct kvm_stat_data *)data;
+ struct kvm_stat_data *stat_data = data;
switch (stat_data->kind) {
case KVM_STAT_VM:
@@ -5665,7 +5663,7 @@ static int kvm_stat_data_get(void *data, u64 *val)
static int kvm_stat_data_clear(void *data, u64 val)
{
int r = -EFAULT;
- struct kvm_stat_data *stat_data = (struct kvm_stat_data *)data;
+ struct kvm_stat_data *stat_data = data;
if (val)
return -EINVAL;