Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "Quite a large pull request due to a selftest API overhaul and some
  patches that had come in too late for 5.19.

  ARM:

   - Unwinder implementations for both nVHE modes (classic and
     protected), complete with an overflow stack

   - Rework of the sysreg access from userspace, with a complete rewrite
     of the vgic-v3 view to allign with the rest of the infrastructure

   - Disagregation of the vcpu flags in separate sets to better track
     their use model.

   - A fix for the GICv2-on-v3 selftest

   - A small set of cosmetic fixes

  RISC-V:

   - Track ISA extensions used by Guest using bitmap

   - Added system instruction emulation framework

   - Added CSR emulation framework

   - Added gfp_custom flag in struct kvm_mmu_memory_cache

   - Added G-stage ioremap() and iounmap() functions

   - Added support for Svpbmt inside Guest

  s390:

   - add an interface to provide a hypervisor dump for secure guests

   - improve selftests to use TAP interface

   - enable interpretive execution of zPCI instructions (for PCI
     passthrough)

   - First part of deferred teardown

   - CPU Topology

   - PV attestation

   - Minor fixes

  x86:

   - Permit guests to ignore single-bit ECC errors

   - Intel IPI virtualization

   - Allow getting/setting pending triple fault with
     KVM_GET/SET_VCPU_EVENTS

   - PEBS virtualization

   - Simplify PMU emulation by just using PERF_TYPE_RAW events

   - More accurate event reinjection on SVM (avoid retrying
     instructions)

   - Allow getting/setting the state of the speaker port data bit

   - Refuse starting the kvm-intel module if VM-Entry/VM-Exit controls
     are inconsistent

   - "Notify" VM exit (detect microarchitectural hangs) for Intel

   - Use try_cmpxchg64 instead of cmpxchg64

   - Ignore benign host accesses to PMU MSRs when PMU is disabled

   - Allow disabling KVM's "MONITOR/MWAIT are NOPs!" behavior

   - Allow NX huge page mitigation to be disabled on a per-vm basis

   - Port eager page splitting to shadow MMU as well

   - Enable CMCI capability by default and handle injected UCNA errors

   - Expose pid of vcpu threads in debugfs

   - x2AVIC support for AMD

   - cleanup PIO emulation

   - Fixes for LLDT/LTR emulation

   - Don't require refcounted "struct page" to create huge SPTEs

   - Miscellaneous cleanups:
      - MCE MSR emulation
      - Use separate namespaces for guest PTEs and shadow PTEs bitmasks
      - PIO emulation
      - Reorganize rmap API, mostly around rmap destruction
      - Do not workaround very old KVM bugs for L0 that runs with nesting enabled
      - new selftests API for CPUID

  Generic:

   - Fix races in gfn->pfn cache refresh; do not pin pages tracked by
     the cache

   - new selftests API using struct kvm_vcpu instead of a (vm, id)
     tuple"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (606 commits)
  selftests: kvm: set rax before vmcall
  selftests: KVM: Add exponent check for boolean stats
  selftests: KVM: Provide descriptive assertions in kvm_binary_stats_test
  selftests: KVM: Check stat name before other fields
  KVM: x86/mmu: remove unused variable
  RISC-V: KVM: Add support for Svpbmt inside Guest/VM
  RISC-V: KVM: Use PAGE_KERNEL_IO in kvm_riscv_gstage_ioremap()
  RISC-V: KVM: Add G-stage ioremap() and iounmap() functions
  KVM: Add gfp_custom flag in struct kvm_mmu_memory_cache
  RISC-V: KVM: Add extensible CSR emulation framework
  RISC-V: KVM: Add extensible system instruction emulation framework
  RISC-V: KVM: Factor-out instruction emulation into separate sources
  RISC-V: KVM: move preempt_disable() call in kvm_arch_vcpu_ioctl_run
  RISC-V: KVM: Make kvm_riscv_guest_timer_init a void function
  RISC-V: KVM: Fix variable spelling mistake
  RISC-V: KVM: Improve ISA extension by using a bitmap
  KVM, x86/mmu: Fix the comment around kvm_tdp_mmu_zap_leafs()
  KVM: SVM: Dump Virtual Machine Save Area (VMSA) to klog
  KVM: x86/mmu: Treat NX as a valid SPTE bit for NPT
  KVM: x86: Do not block APIC write for non ICR registers
  ...

1 files changed, 11 insertions, 106 deletions

diff --git a/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
index 8aed0db1331d..d09b3cbcadc6 100644
--- a/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
+++ b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
@@ -15,116 +15,21 @@
 #include "kvm_util.h"
 #include "processor.h"
 
-static int kvm_num_index_msrs(int kvm_fd, int nmsrs)
-{
-	struct kvm_msr_list *list;
-	int r;
-
-	list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0]));
-	list->nmsrs = nmsrs;
-	r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list);
-	TEST_ASSERT(r == -1 && errno == E2BIG,
-				"Unexpected result from KVM_GET_MSR_INDEX_LIST probe, r: %i",
-				r);
-
-	r = list->nmsrs;
-	free(list);
-	return r;
-}
-
-static void test_get_msr_index(void)
-{
-	int old_res, res, kvm_fd, r;
-	struct kvm_msr_list *list;
-
-	kvm_fd = open_kvm_dev_path_or_exit();
-
-	old_res = kvm_num_index_msrs(kvm_fd, 0);
-	TEST_ASSERT(old_res != 0, "Expecting nmsrs to be > 0");
-
-	if (old_res != 1) {
-		res = kvm_num_index_msrs(kvm_fd, 1);
-		TEST_ASSERT(res > 1, "Expecting nmsrs to be > 1");
-		TEST_ASSERT(res == old_res, "Expecting nmsrs to be identical");
-	}
-
-	list = malloc(sizeof(*list) + old_res * sizeof(list->indices[0]));
-	list->nmsrs = old_res;
-	r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list);
-
-	TEST_ASSERT(r == 0,
-		    "Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST, r: %i",
-		    r);
-	TEST_ASSERT(list->nmsrs == old_res, "Expecting nmsrs to be identical");
-	free(list);
-
-	close(kvm_fd);
-}
-
-static int kvm_num_feature_msrs(int kvm_fd, int nmsrs)
-{
-	struct kvm_msr_list *list;
-	int r;
-
-	list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0]));
-	list->nmsrs = nmsrs;
-	r = ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, list);
-	TEST_ASSERT(r == -1 && errno == E2BIG,
-		"Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST probe, r: %i",
-				r);
-
-	r = list->nmsrs;
-	free(list);
-	return r;
-}
-
-struct kvm_msr_list *kvm_get_msr_feature_list(int kvm_fd, int nmsrs)
-{
-	struct kvm_msr_list *list;
-	int r;
-
-	list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0]));
-	list->nmsrs = nmsrs;
-	r = ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, list);
-
-	TEST_ASSERT(r == 0,
-		"Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST, r: %i",
-		r);
-
-	return list;
-}
-
-static void test_get_msr_feature(void)
+int main(int argc, char *argv[])
 {
-	int res, old_res, i, kvm_fd;
-	struct kvm_msr_list *feature_list;
+	const struct kvm_msr_list *feature_list;
+	int i;
 
-	kvm_fd = open_kvm_dev_path_or_exit();
+	/*
+	 * Skip the entire test if MSR_FEATURES isn't supported, other tests
+	 * will cover the "regular" list of MSRs, the coverage here is purely
+	 * opportunistic and not interesting on its own.
+	 */
+	TEST_REQUIRE(kvm_has_cap(KVM_CAP_GET_MSR_FEATURES));
 
-	old_res = kvm_num_feature_msrs(kvm_fd, 0);
-	TEST_ASSERT(old_res != 0, "Expecting nmsrs to be > 0");
-
-	if (old_res != 1) {
-		res = kvm_num_feature_msrs(kvm_fd, 1);
-		TEST_ASSERT(res > 1, "Expecting nmsrs to be > 1");
-		TEST_ASSERT(res == old_res, "Expecting nmsrs to be identical");
-	}
-
-	feature_list = kvm_get_msr_feature_list(kvm_fd, old_res);
-	TEST_ASSERT(old_res == feature_list->nmsrs,
-				"Unmatching number of msr indexes");
+	(void)kvm_get_msr_index_list();
 
+	feature_list = kvm_get_feature_msr_index_list();
 	for (i = 0; i < feature_list->nmsrs; i++)
 		kvm_get_feature_msr(feature_list->indices[i]);
-
-	free(feature_list);
-	close(kvm_fd);
-}
-
-int main(int argc, char *argv[])
-{
-	if (kvm_check_cap(KVM_CAP_GET_MSR_FEATURES))
-		test_get_msr_feature();
-
-	test_get_msr_index();
 }