[RFC kvmtool 08/31] linux: Update kernel headers for RME support

Suzuki K Poulose
2023-01-27T11:41:29Z

Update the RME specific ABI bits from the kernel headers.

Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
arm/aarch64/include/asm/kvm.h | 64 +++++++++++++++++++++++++++++++++++
include/linux/kvm.h | 22 +++++++++---
include/linux/virtio_blk.h | 19 -----------
include/linux/virtio_net.h | 14 ++++----
include/linux/virtio_ring.h | 16 +++------
5 files changed, 93 insertions(+), 42 deletions(-)

diff --git a/arm/aarch64/include/asm/kvm.h b/arm/aarch64/include/asm/kvm.h
index 316917b9..653a08fb 100644
--- a/arm/aarch64/include/asm/kvm.h
+++ b/arm/aarch64/include/asm/kvm.h
@@ -108,6 +108,7 @@ struct kvm_regs {
#define KVM_ARM_VCPU_SVE 4 /* enable SVE for this CPU */
#define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5 /* VCPU uses address authentication */
#define KVM_ARM_VCPU_PTRAUTH_GENERIC 6 /* VCPU uses generic authentication */
+#define KVM_ARM_VCPU_REC 7 /* VCPU REC state as part of Realm */

struct kvm_vcpu_init {
__u32 target;
@@ -400,6 +401,69 @@ enum {
#define KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES 3
#define KVM_DEV_ARM_ITS_CTRL_RESET 4

+/* KVM_CAP_ARM_RME kvm_enable_cap->args[0] points to this */
+#define KVM_CAP_ARM_RME_CONFIG_REALM 0
+#define KVM_CAP_ARM_RME_CREATE_RD 1
+#define KVM_CAP_ARM_RME_INIT_IPA_REALM 2
+#define KVM_CAP_ARM_RME_POPULATE_REALM 3
+#define KVM_CAP_ARM_RME_ACTIVATE_REALM 4
+
+#define KVM_CAP_ARM_RME_MEASUREMENT_ALGO_ZERO (0x01ULL << 7)
+#define KVM_CAP_ARM_RME_MEASUREMENT_ALGO_SHA256 0
+#define KVM_CAP_ARM_RME_MEASUREMENT_ALGO_SHA512 1
+
+#define KVM_CAP_ARM_RME_RPV_SIZE 64
+
+/* List of configuration items accepted for KVM_CAP_ARM_RME_CONFIG_REALM */
+#define KVM_CAP_ARM_RME_CFG_RPV 0
+#define KVM_CAP_ARM_RME_CFG_HASH_ALGO 1
+#define KVM_CAP_ARM_RME_CFG_SVE 2
+#define KVM_CAP_ARM_RME_CFG_DBG 3
+#define KVM_CAP_ARM_RME_CFG_PMU 4
+
+struct kvm_cap_arm_rme_config_item {
+ __u32 cfg;
+ union {
+ /* cfg == KVM_CAP_ARM_RME_CFG_RPV */
+ struct {
+ __u8 rpv[KVM_CAP_ARM_RME_RPV_SIZE];
+ };
+
+ /* cfg == KVM_CAP_ARM_RME_CFG_HASH_ALGO */
+ struct {
+ __u32 hash_algo;
+ };
+
+ /* cfg == KVM_CAP_ARM_RME_CFG_SVE */
+ struct {
+ __u32 sve_vq;
+ };
+
+ /* cfg == KVM_CAP_ARM_RME_CFG_DBG */
+ struct {
+ __u32 num_brps;
+ __u32 num_wrps;
+ };
+
+ /* cfg == KVM_CAP_ARM_RME_CFG_PMU */
+ struct {
+ __u32 num_pmu_cntrs;
+ };
+ /* Fix the size of the union */
+ __u8 reserved[256];
+ };
+};
+
+struct kvm_cap_arm_rme_populate_realm_args {
+ __u64 populate_ipa_base;
+ __u64 populate_ipa_size;
+};
+
+struct kvm_cap_arm_rme_init_ipa_args {
+ __u64 init_ipa_base;
+ __u64 init_ipa_size;
+};
+
/* Device Control API on vcpu fd */
#define KVM_ARM_VCPU_PMU_V3_CTRL 0
#define KVM_ARM_VCPU_PMU_V3_IRQ 0
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 0d5d4419..789c7f89 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -903,14 +903,25 @@ struct kvm_ppc_resize_hpt {
#define KVM_S390_SIE_PAGE_OFFSET 1

/*
- * On arm64, machine type can be used to request the physical
- * address size for the VM. Bits[7-0] are reserved for the guest
- * PA size shift (i.e, log2(PA_Size)). For backward compatibility,
- * value 0 implies the default IPA size, 40bits.
+ * On arm64, machine type can be used to request both the machine type and
+ * the physical address size for the VM.
+ *
+ * Bits[11-8] are reserved for the ARM specific machine type.
+ *
+ * Bits[7-0] are reserved for the guest PA size shift (i.e, log2(PA_Size)).
+ * For backward compatibility, value 0 implies the default IPA size, 40bits.
*/
+#define KVM_VM_TYPE_ARM_SHIFT 8
+#define KVM_VM_TYPE_ARM_MASK (0xfULL << KVM_VM_TYPE_ARM_SHIFT)
+#define KVM_VM_TYPE_ARM(_type) \
+ (((_type) << KVM_VM_TYPE_ARM_SHIFT) & KVM_VM_TYPE_ARM_MASK)
+#define KVM_VM_TYPE_ARM_NORMAL KVM_VM_TYPE_ARM(0)
+#define KVM_VM_TYPE_ARM_REALM KVM_VM_TYPE_ARM(1)
+
#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK 0xffULL
#define KVM_VM_TYPE_ARM_IPA_SIZE(x) \
((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK)
+
/*
* ioctls for /dev/kvm fds:
*/
@@ -1177,7 +1188,8 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_DISABLE_NX_HUGE_PAGES 220
#define KVM_CAP_S390_ZPCI_OP 221
#define KVM_CAP_S390_CPU_TOPOLOGY 222
-#define KVM_CAP_DIRTY_LOG_RING_ACQ_REL 223
+
+#define KVM_CAP_ARM_RME 300 // FIXME: Large number to prevent conflicts

#ifdef KVM_CAP_IRQ_ROUTING

diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index 58e70b24..d888f013 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -40,7 +40,6 @@
#define VIRTIO_BLK_F_MQ 12 /* support more than one vq */
#define VIRTIO_BLK_F_DISCARD 13 /* DISCARD is supported */
#define VIRTIO_BLK_F_WRITE_ZEROES 14 /* WRITE ZEROES is supported */
-#define VIRTIO_BLK_F_SECURE_ERASE 16 /* Secure Erase is supported */

/* Legacy feature bits */
#ifndef VIRTIO_BLK_NO_LEGACY
@@ -122,21 +121,6 @@ struct virtio_blk_config {
__u8 write_zeroes_may_unmap;

__u8 unused1[3];
-
- /* the next 3 entries are guarded by VIRTIO_BLK_F_SECURE_ERASE */
- /*
- * The maximum secure erase sectors (in 512-byte sectors) for
- * one segment.
- */
- __virtio32 max_secure_erase_sectors;
- /*
- * The maximum number of secure erase segments in a
- * secure erase command.
- */
- __virtio32 max_secure_erase_seg;
- /* Secure erase commands must be aligned to this number of sectors. */
- __virtio32 secure_erase_sector_alignment;
-
} __attribute__((packed));

/*
@@ -171,9 +155,6 @@ struct virtio_blk_config {
/* Write zeroes command */
#define VIRTIO_BLK_T_WRITE_ZEROES 13

-/* Secure erase command */
-#define VIRTIO_BLK_T_SECURE_ERASE 14
-
#ifndef VIRTIO_BLK_NO_LEGACY
/* Barrier before this op. */
#define VIRTIO_BLK_T_BARRIER 0x80000000
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index 6cb842ea..29ced555 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -56,7 +56,7 @@
#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow
* Steering */
#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
-#define VIRTIO_NET_F_NOTF_COAL 53 /* Device supports notifications coalescing */
+#define VIRTIO_NET_F_NOTF_COAL 53 /* Guest can handle notifications coalescing */
#define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */
#define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */
#define VIRTIO_NET_F_RSC_EXT 61 /* extended coalescing info */
@@ -364,24 +364,24 @@ struct virtio_net_hash_config {
*/
#define VIRTIO_NET_CTRL_NOTF_COAL 6
/*
- * Set the tx-usecs/tx-max-packets parameters.
+ * Set the tx-usecs/tx-max-packets patameters.
+ * tx-usecs - Maximum number of usecs to delay a TX notification.
+ * tx-max-packets - Maximum number of packets to send before a TX notification.
*/
struct virtio_net_ctrl_coal_tx {
- /* Maximum number of packets to send before a TX notification */
__le32 tx_max_packets;
- /* Maximum number of usecs to delay a TX notification */
__le32 tx_usecs;
};

#define VIRTIO_NET_CTRL_NOTF_COAL_TX_SET 0

/*
- * Set the rx-usecs/rx-max-packets parameters.
+ * Set the rx-usecs/rx-max-packets patameters.
+ * rx-usecs - Maximum number of usecs to delay a RX notification.
+ * rx-max-frames - Maximum number of packets to receive before a RX notification.
*/
struct virtio_net_ctrl_coal_rx {
- /* Maximum number of packets to receive before a RX notification */
__le32 rx_max_packets;
- /* Maximum number of usecs to delay a RX notification */
__le32 rx_usecs;
};

diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index f8c20d3d..476d3e5c 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -93,21 +93,15 @@
#define VRING_USED_ALIGN_SIZE 4
#define VRING_DESC_ALIGN_SIZE 16

-/**
- * struct vring_desc - Virtio ring descriptors,
- * 16 bytes long. These can chain together via @next.
- *
- * @addr: buffer address (guest-physical)
- * @len: buffer length
- * @flags: descriptor flags
- * @next: index of the next descriptor in the chain,
- * if the VRING_DESC_F_NEXT flag is set. We chain unused
- * descriptors via this, too.
- */
+/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
struct vring_desc {
+ /* Address (guest-physical). */
__virtio64 addr;
+ /* Length. */
__virtio32 len;
+ /* The flags as indicated above. */
__virtio16 flags;
+ /* We chain unused descriptors via this, too */
__virtio16 next;
};

--
2.34.1