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

Pull more KVM updates from Paolo Bonzini:
 "x86 KVM changes:

   - The usual accuracy improvements for nested virtualization

   - The usual round of code cleanups from Sean

   - Added back optimizations that were prematurely removed in 5.2 (the
     bare minimum needed to fix the regression was in 5.3-rc8, here
     comes the rest)

   - Support for UMWAIT/UMONITOR/TPAUSE

   - Direct L2->L0 TLB flushing when L0 is Hyper-V and L1 is KVM

   - Tell Windows guests if SMT is disabled on the host

   - More accurate detection of vmexit cost

   - Revert a pvqspinlock pessimization"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (56 commits)
  KVM: nVMX: cleanup and fix host 64-bit mode checks
  KVM: vmx: fix build warnings in hv_enable_direct_tlbflush() on i386
  KVM: x86: Don't check kvm_rebooting in __kvm_handle_fault_on_reboot()
  KVM: x86: Drop ____kvm_handle_fault_on_reboot()
  KVM: VMX: Add error handling to VMREAD helper
  KVM: VMX: Optimize VMX instruction error and fault handling
  KVM: x86: Check kvm_rebooting in kvm_spurious_fault()
  KVM: selftests: fix ucall on x86
  Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"
  kvm: nvmx: limit atomic switch MSRs
  kvm: svm: Intercept RDPRU
  kvm: x86: Add "significant index" flag to a few CPUID leaves
  KVM: x86/mmu: Skip invalid pages during zapping iff root_count is zero
  KVM: x86/mmu: Explicitly track only a single invalid mmu generation
  KVM: x86/mmu: Revert "KVM: x86/mmu: Remove is_obsolete() call"
  KVM: x86/mmu: Revert "Revert "KVM: MMU: reclaim the zapped-obsolete page first""
  KVM: x86/mmu: Revert "Revert "KVM: MMU: collapse TLB flushes when zap all pages""
  KVM: x86/mmu: Revert "Revert "KVM: MMU: zap pages in batch""
  KVM: x86/mmu: Revert "Revert "KVM: MMU: add tracepoint for kvm_mmu_invalidate_all_pages""
  KVM: x86/mmu: Revert "Revert "KVM: MMU: show mmu_valid_gen in shadow page related tracepoints""
  ...

1 files changed, 53 insertions, 14 deletions

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 6e49bb039376..80a338b5403c 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -8,6 +8,7 @@
 #include "test_util.h"
 #include "kvm_util.h"
 #include "kvm_util_internal.h"
+#include "processor.h"
 
 #include <assert.h>
 #include <sys/mman.h>
@@ -84,7 +85,7 @@ int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap)
 	return ret;
 }
 
-static void vm_open(struct kvm_vm *vm, int perm, unsigned long type)
+static void vm_open(struct kvm_vm *vm, int perm)
 {
 	vm->kvm_fd = open(KVM_DEV_PATH, perm);
 	if (vm->kvm_fd < 0)
@@ -95,18 +96,19 @@ static void vm_open(struct kvm_vm *vm, int perm, unsigned long type)
 		exit(KSFT_SKIP);
 	}
 
-	vm->fd = ioctl(vm->kvm_fd, KVM_CREATE_VM, type);
+	vm->fd = ioctl(vm->kvm_fd, KVM_CREATE_VM, vm->type);
 	TEST_ASSERT(vm->fd >= 0, "KVM_CREATE_VM ioctl failed, "
 		"rc: %i errno: %i", vm->fd, errno);
 }
 
 const char * const vm_guest_mode_string[] = {
-	"PA-bits:52, VA-bits:48, 4K pages",
-	"PA-bits:52, VA-bits:48, 64K pages",
-	"PA-bits:48, VA-bits:48, 4K pages",
-	"PA-bits:48, VA-bits:48, 64K pages",
-	"PA-bits:40, VA-bits:48, 4K pages",
-	"PA-bits:40, VA-bits:48, 64K pages",
+	"PA-bits:52,  VA-bits:48,  4K pages",
+	"PA-bits:52,  VA-bits:48, 64K pages",
+	"PA-bits:48,  VA-bits:48,  4K pages",
+	"PA-bits:48,  VA-bits:48, 64K pages",
+	"PA-bits:40,  VA-bits:48,  4K pages",
+	"PA-bits:40,  VA-bits:48, 64K pages",
+	"PA-bits:ANY, VA-bits:48,  4K pages",
 };
 _Static_assert(sizeof(vm_guest_mode_string)/sizeof(char *) == NUM_VM_MODES,
 	       "Missing new mode strings?");
@@ -130,17 +132,17 @@ _Static_assert(sizeof(vm_guest_mode_string)/sizeof(char *) == NUM_VM_MODES,
  * descriptor to control the created VM is created with the permissions
  * given by perm (e.g. O_RDWR).
  */
-struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
-			  int perm, unsigned long type)
+struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 {
 	struct kvm_vm *vm;
 
+	DEBUG("Testing guest mode: %s\n", vm_guest_mode_string(mode));
+
 	vm = calloc(1, sizeof(*vm));
 	TEST_ASSERT(vm != NULL, "Insufficient Memory");
 
 	vm->mode = mode;
-	vm->type = type;
-	vm_open(vm, perm, type);
+	vm->type = 0;
 
 	/* Setup mode specific traits. */
 	switch (vm->mode) {
@@ -186,10 +188,32 @@ struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
 		vm->page_size = 0x10000;
 		vm->page_shift = 16;
 		break;
+	case VM_MODE_PXXV48_4K:
+#ifdef __x86_64__
+		kvm_get_cpu_address_width(&vm->pa_bits, &vm->va_bits);
+		TEST_ASSERT(vm->va_bits == 48, "Linear address width "
+			    "(%d bits) not supported", vm->va_bits);
+		vm->pgtable_levels = 4;
+		vm->page_size = 0x1000;
+		vm->page_shift = 12;
+		DEBUG("Guest physical address width detected: %d\n",
+		      vm->pa_bits);
+#else
+		TEST_ASSERT(false, "VM_MODE_PXXV48_4K not supported on "
+			    "non-x86 platforms");
+#endif
+		break;
 	default:
 		TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", mode);
 	}
 
+#ifdef __aarch64__
+	if (vm->pa_bits != 40)
+		vm->type = KVM_VM_TYPE_ARM_IPA_SIZE(vm->pa_bits);
+#endif
+
+	vm_open(vm, perm);
+
 	/* Limit to VA-bit canonical virtual addresses. */
 	vm->vpages_valid = sparsebit_alloc();
 	sparsebit_set_num(vm->vpages_valid,
@@ -212,7 +236,7 @@ struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
 
 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 {
-	return _vm_create(mode, phy_pages, perm, 0);
+	return _vm_create(mode, phy_pages, perm);
 }
 
 /*
@@ -232,7 +256,7 @@ void kvm_vm_restart(struct kvm_vm *vmp, int perm)
 {
 	struct userspace_mem_region *region;
 
-	vm_open(vmp, perm, vmp->type);
+	vm_open(vmp, perm);
 	if (vmp->has_irqchip)
 		vm_create_irqchip(vmp);
 
@@ -1628,3 +1652,18 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm)
 
 	return val == 'Y';
 }
+
+unsigned int vm_get_page_size(struct kvm_vm *vm)
+{
+	return vm->page_size;
+}
+
+unsigned int vm_get_page_shift(struct kvm_vm *vm)
+{
+	return vm->page_shift;
+}
+
+unsigned int vm_get_max_gfn(struct kvm_vm *vm)
+{
+	return vm->max_gfn;
+}