[PATCH v2 12/12] KVM: selftests: arm64: Support P52V48 4K and 16K guest_modes
Ryan Roberts
ryan.roberts at arm.com
Mon Mar 6 11:54:38 PST 2023
Add support for VM_MODE_P52V48_4K and VM_MODE_P52V48_16K guest modes by
using the FEAT_LPA2 pte format for stage1, when FEAT_LPA2 is available.
Signed-off-by: Ryan Roberts <ryan.roberts at arm.com>
---
.../selftests/kvm/include/kvm_util_base.h | 1 +
.../selftests/kvm/lib/aarch64/processor.c | 39 ++++++++++++++-----
tools/testing/selftests/kvm/lib/guest_modes.c | 2 +
tools/testing/selftests/kvm/lib/kvm_util.c | 3 ++
4 files changed, 36 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index fbc2a79369b8..b8678bf4a980 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -150,6 +150,7 @@ static inline struct userspace_mem_region *vm_get_mem_region(struct kvm_vm *vm,
enum vm_guest_mode {
VM_MODE_P52V48_4K,
+ VM_MODE_P52V48_16K,
VM_MODE_P52V48_64K,
VM_MODE_P48V48_4K,
VM_MODE_P48V48_16K,
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index b2d80396b8f8..934f8baa7d0e 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -12,6 +12,7 @@
#include "kvm_util.h"
#include "processor.h"
#include <linux/bitfield.h>
+#include <linux/sizes.h>
#define DEFAULT_ARM64_GUEST_STACK_VADDR_MIN 0xac0000
@@ -58,13 +59,25 @@ static uint64_t pte_index(struct kvm_vm *vm, vm_vaddr_t gva)
return (gva >> vm->page_shift) & mask;
}
+static inline bool use_lpa2_pte_format(struct kvm_vm *vm)
+{
+ return (vm->page_size == SZ_4K || vm->page_size == SZ_16K) &&
+ (vm->pa_bits > 48 || vm->va_bits > 48);
+}
+
static uint64_t addr_pte(struct kvm_vm *vm, uint64_t pa, uint64_t attrs)
{
uint64_t pte;
- pte = pa & GENMASK(47, vm->page_shift);
- if (vm->page_shift == 16)
- pte |= (pa & GENMASK(51, 48)) >> (48 - 12);
+ if (use_lpa2_pte_format(vm)) {
+ pte = pa & GENMASK(49, vm->page_shift);
+ pte |= (pa & GENMASK(51, 50)) >> (50 - 8);
+ attrs &= ~GENMASK(9, 8);
+ } else {
+ pte = pa & GENMASK(47, vm->page_shift);
+ if (vm->page_shift == 16)
+ pte |= (pa & GENMASK(51, 48)) >> (48 - 12);
+ }
pte |= attrs;
return pte;
@@ -74,9 +87,14 @@ static uint64_t pte_addr(struct kvm_vm *vm, uint64_t pte)
{
uint64_t pa;
- pa = pte & GENMASK(47, vm->page_shift);
- if (vm->page_shift == 16)
- pa |= (pte & GENMASK(15, 12)) << (48 - 12);
+ if (use_lpa2_pte_format(vm)) {
+ pa = pte & GENMASK(49, vm->page_shift);
+ pa |= (pte & GENMASK(9, 8)) << (50 - 8);
+ } else {
+ pa = pte & GENMASK(47, vm->page_shift);
+ if (vm->page_shift == 16)
+ pa |= (pte & GENMASK(15, 12)) << (48 - 12);
+ }
return pa;
}
@@ -266,9 +284,6 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
/* Configure base granule size */
switch (vm->mode) {
- case VM_MODE_P52V48_4K:
- TEST_FAIL("AArch64 does not support 4K sized pages "
- "with 52-bit physical address ranges");
case VM_MODE_PXXV48_4K:
TEST_FAIL("AArch64 does not support 4K sized pages "
"with ANY-bit physical address ranges");
@@ -278,12 +293,14 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
case VM_MODE_P36V48_64K:
tcr_el1 |= 1ul << 14; /* TG0 = 64KB */
break;
+ case VM_MODE_P52V48_16K:
case VM_MODE_P48V48_16K:
case VM_MODE_P40V48_16K:
case VM_MODE_P36V48_16K:
case VM_MODE_P36V47_16K:
tcr_el1 |= 2ul << 14; /* TG0 = 16KB */
break;
+ case VM_MODE_P52V48_4K:
case VM_MODE_P48V48_4K:
case VM_MODE_P40V48_4K:
case VM_MODE_P36V48_4K:
@@ -297,6 +314,8 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
/* Configure output size */
switch (vm->mode) {
+ case VM_MODE_P52V48_4K:
+ case VM_MODE_P52V48_16K:
case VM_MODE_P52V48_64K:
tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
ttbr0_el1 |= (vm->pgd & GENMASK(51, 48)) >> (48 - 2);
@@ -325,6 +344,8 @@ void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init)
/* TCR_EL1 |= IRGN0:WBWA | ORGN0:WBWA | SH0:Inner-Shareable */;
tcr_el1 |= (1 << 8) | (1 << 10) | (3 << 12);
tcr_el1 |= (64 - vm->va_bits) /* T0SZ */;
+ if (use_lpa2_pte_format(vm))
+ tcr_el1 |= (1ul << 59) /* DS */;
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_SCTLR_EL1), sctlr_el1);
vcpu_set_reg(vcpu, KVM_ARM64_SYS_REG(SYS_TCR_EL1), tcr_el1);
diff --git a/tools/testing/selftests/kvm/lib/guest_modes.c b/tools/testing/selftests/kvm/lib/guest_modes.c
index c64c5cf49942..6634afc22137 100644
--- a/tools/testing/selftests/kvm/lib/guest_modes.c
+++ b/tools/testing/selftests/kvm/lib/guest_modes.c
@@ -23,6 +23,8 @@ void guest_modes_append_default(void)
aarch64_get_supported_page_sizes(limit, &ipa4k, &ipa16k, &ipa64k);
+ guest_mode_append(VM_MODE_P52V48_4K, ipa4k >= 52, ipa4k >= 52);
+ guest_mode_append(VM_MODE_P52V48_16K, ipa16k >= 52, ipa16k >= 52);
guest_mode_append(VM_MODE_P52V48_64K, ipa64k >= 52, ipa64k >= 52);
guest_mode_append(VM_MODE_P48V48_4K, ipa4k >= 48, ipa4k >= 48);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 3ea24a5f4c43..0e4905b75825 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -143,6 +143,7 @@ const char *vm_guest_mode_string(uint32_t i)
{
static const char * const strings[] = {
[VM_MODE_P52V48_4K] = "PA-bits:52, VA-bits:48, 4K pages",
+ [VM_MODE_P52V48_16K] = "PA-bits:52, VA-bits:48, 16K pages",
[VM_MODE_P52V48_64K] = "PA-bits:52, VA-bits:48, 64K pages",
[VM_MODE_P48V48_4K] = "PA-bits:48, VA-bits:48, 4K pages",
[VM_MODE_P48V48_16K] = "PA-bits:48, VA-bits:48, 16K pages",
@@ -168,6 +169,7 @@ const char *vm_guest_mode_string(uint32_t i)
const struct vm_guest_mode_params vm_guest_mode_params[] = {
[VM_MODE_P52V48_4K] = { 52, 48, 0x1000, 12 },
+ [VM_MODE_P52V48_16K] = { 52, 48, 0x4000, 14 },
[VM_MODE_P52V48_64K] = { 52, 48, 0x10000, 16 },
[VM_MODE_P48V48_4K] = { 48, 48, 0x1000, 12 },
[VM_MODE_P48V48_16K] = { 48, 48, 0x4000, 14 },
@@ -246,6 +248,7 @@ struct kvm_vm *____vm_create(enum vm_guest_mode mode)
case VM_MODE_P36V48_64K:
vm->pgtable_levels = 3;
break;
+ case VM_MODE_P52V48_16K:
case VM_MODE_P48V48_16K:
case VM_MODE_P40V48_16K:
case VM_MODE_P36V48_16K:
--
2.25.1
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