The patch below does not apply to the 5.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 1bc603af73dd8fb2934306e861009c54f973dcc2 Mon Sep 17 00:00:00 2001
From: Christian Borntraeger borntraeger@de.ibm.com Date: Tue, 8 Jun 2021 14:39:54 +0200 Subject: [PATCH] KVM: selftests: introduce P47V64 for s390x
s390x can have up to 47bits of physical guest and 64bits of virtual address bits. Add a new address mode to avoid errors of testcases going beyond 47bits.
Signed-off-by: Christian Borntraeger borntraeger@de.ibm.com Message-Id: 20210608123954.10991-1-borntraeger@de.ibm.com Fixes: ef4c9f4f6546 ("KVM: selftests: Fix 32-bit truncation of vm_get_max_gfn()") Cc: stable@vger.kernel.org Reviewed-by: David Matlack dmatlack@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index fcd8e3855111..b602552b1ed0 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -43,6 +43,7 @@ enum vm_guest_mode { VM_MODE_P40V48_4K, VM_MODE_P40V48_64K, VM_MODE_PXXV48_4K, /* For 48bits VA but ANY bits PA */ + VM_MODE_P47V64_4K, NUM_VM_MODES, };
@@ -60,7 +61,7 @@ enum vm_guest_mode {
#elif defined(__s390x__)
-#define VM_MODE_DEFAULT VM_MODE_P52V48_4K +#define VM_MODE_DEFAULT VM_MODE_P47V64_4K #define MIN_PAGE_SHIFT 12U #define ptes_per_page(page_size) ((page_size) / 16)
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 28e528c19d28..b126fab6c4e1 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -175,6 +175,7 @@ const char *vm_guest_mode_string(uint32_t i) [VM_MODE_P40V48_4K] = "PA-bits:40, VA-bits:48, 4K pages", [VM_MODE_P40V48_64K] = "PA-bits:40, VA-bits:48, 64K pages", [VM_MODE_PXXV48_4K] = "PA-bits:ANY, VA-bits:48, 4K pages", + [VM_MODE_P47V64_4K] = "PA-bits:47, VA-bits:64, 4K pages", }; _Static_assert(sizeof(strings)/sizeof(char *) == NUM_VM_MODES, "Missing new mode strings?"); @@ -192,6 +193,7 @@ const struct vm_guest_mode_params vm_guest_mode_params[] = { { 40, 48, 0x1000, 12 }, { 40, 48, 0x10000, 16 }, { 0, 0, 0x1000, 12 }, + { 47, 64, 0x1000, 12 }, }; _Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params) == NUM_VM_MODES, "Missing new mode params?"); @@ -277,6 +279,9 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm) TEST_FAIL("VM_MODE_PXXV48_4K not supported on non-x86 platforms"); #endif break; + case VM_MODE_P47V64_4K: + vm->pgtable_levels = 5; + break; default: TEST_FAIL("Unknown guest mode, mode: 0x%x", mode); }