From: Christian Borntraeger <borntraeger@de.ibm.com>
To: pbonzini@redhat.com
Cc: bgardon@google.com, dmatlack@google.com, drjones@redhat.com,
frankja@linux.ibm.com, kvm@vger.kernel.org,
linux-s390@vger.kernel.org, peterx@redhat.com,
venkateshs@chromium.org
Subject: Re: [PATCH] KVM: selftests: introduce P47V64 for s390x
Date: Tue, 8 Jun 2021 14:18:21 +0200 [thread overview]
Message-ID: <264e8e21-059b-d869-28bb-3d8f33b8459c@de.ibm.com> (raw)
In-Reply-To: <20210608114546.6419-1-borntraeger@de.ibm.com>
On 08.06.21 13:45, Christian Borntraeger wrote:
> 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>
> ---
> tools/testing/selftests/kvm/include/kvm_util.h | 3 ++-
> tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
> index fcd8e3855111..6d3f71822976 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, /* For 48bits VA but ANY bits PA */
> 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..d61ad15b1979 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 = 4;
I will change that to 5 as well.
next prev parent reply other threads:[~2021-06-08 12:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 17:38 [PATCH v2] KVM: selftests: Fix 32-bit truncation of vm_get_max_gfn() David Matlack
2021-05-21 17:49 ` Peter Xu
2021-05-22 10:59 ` Andrew Jones
2021-05-24 12:30 ` Paolo Bonzini
2021-06-08 8:39 ` Christian Borntraeger
2021-06-08 10:03 ` Christian Borntraeger
2021-06-08 11:45 ` [PATCH] KVM: selftests: introduce P47V64 for s390x Christian Borntraeger
2021-06-08 11:49 ` Janosch Frank
2021-06-08 11:55 ` Christian Borntraeger
2021-06-08 12:18 ` Christian Borntraeger [this message]
2021-06-08 12:39 ` [PATCH v2] " Christian Borntraeger
2021-06-08 16:41 ` David Matlack
2021-06-08 17:19 ` Paolo Bonzini
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