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
  ...

5 files changed, 16 insertions, 17 deletions

diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index af1f060533f2..7f765d5ad436 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -124,9 +124,9 @@ void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info)
 		 info->virt, (long)info->order, kvm->arch.lpid);
 }
 
-long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order)
+int kvmppc_alloc_reset_hpt(struct kvm *kvm, int order)
 {
-	long err = -EBUSY;
+	int err = -EBUSY;
 	struct kvm_hpt_info info;
 
 	mutex_lock(&kvm->arch.mmu_setup_lock);
@@ -1482,8 +1482,8 @@ static void resize_hpt_prepare_work(struct work_struct *work)
 	mutex_unlock(&kvm->arch.mmu_setup_lock);
 }
 
-long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
-				     struct kvm_ppc_resize_hpt *rhpt)
+int kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
+				    struct kvm_ppc_resize_hpt *rhpt)
 {
 	unsigned long flags = rhpt->flags;
 	unsigned long shift = rhpt->shift;
@@ -1548,13 +1548,13 @@ static void resize_hpt_boot_vcpu(void *opaque)
 	/* Nothing to do, just force a KVM exit */
 }
 
-long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
-				    struct kvm_ppc_resize_hpt *rhpt)
+int kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
+				   struct kvm_ppc_resize_hpt *rhpt)
 {
 	unsigned long flags = rhpt->flags;
 	unsigned long shift = rhpt->shift;
 	struct kvm_resize_hpt *resize;
-	long ret;
+	int ret;
 
 	if (flags != 0 || kvm_is_radix(kvm))
 		return -EINVAL;
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c
index 95e738ef9062..93b695b289e9 100644
--- a/arch/powerpc/kvm/book3s_64_vio.c
+++ b/arch/powerpc/kvm/book3s_64_vio.c
@@ -288,8 +288,8 @@ static const struct file_operations kvm_spapr_tce_fops = {
 	.release	= kvm_spapr_tce_release,
 };
 
-long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
-				   struct kvm_create_spapr_tce_64 *args)
+int kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
+				  struct kvm_create_spapr_tce_64 *args)
 {
 	struct kvmppc_spapr_tce_table *stt = NULL;
 	struct kvmppc_spapr_tce_table *siter;
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 36b295e908ca..130bafdb1430 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -5799,12 +5799,12 @@ static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons,
 }
 #endif
 
-static long kvm_arch_vm_ioctl_hv(struct file *filp,
-				 unsigned int ioctl, unsigned long arg)
+static int kvm_arch_vm_ioctl_hv(struct file *filp,
+				unsigned int ioctl, unsigned long arg)
 {
 	struct kvm *kvm __maybe_unused = filp->private_data;
 	void __user *argp = (void __user *)arg;
-	long r;
+	int r;
 
 	switch (ioctl) {
 
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index da0e888e2521..9118242063fb 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -2044,8 +2044,8 @@ static int kvmppc_core_check_processor_compat_pr(void)
 	return 0;
 }
 
-static long kvm_arch_vm_ioctl_pr(struct file *filp,
-				 unsigned int ioctl, unsigned long arg)
+static int kvm_arch_vm_ioctl_pr(struct file *filp,
+				unsigned int ioctl, unsigned long arg)
 {
 	return -ENOTTY;
 }
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 2a956b5bab98..7197c8256668 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -2379,12 +2379,11 @@ static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
 }
 #endif
 
-long kvm_arch_vm_ioctl(struct file *filp,
-                       unsigned int ioctl, unsigned long arg)
+int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
 {
 	struct kvm *kvm __maybe_unused = filp->private_data;
 	void __user *argp = (void __user *)arg;
-	long r;
+	int r;
 
 	switch (ioctl) {
 	case KVM_PPC_GET_PVINFO: {