KVM: SEV: Do cache maintenance on the source VM during intra-host migrationgrafted

Manually perform cache maintenance on the source VM during intra-host
migration to ensure no stale data is left in CPU caches after the VM is
destroyed.  Because the source VM is "converted" to a non-SEV VM, KVM's
memory reclaim flows won't trigger cache maintenance, e.g. when all guest
memory is reclaimed in response to detaching from the mmu_notifier.

Note, relying on the destination VM to do cache maintenance isn't an option
as KVM doesn't require identical guest memory configurations, i.e. the
source VM may have access to memory that the destination VM does not.
Enforcing equivalent memory configurations is infeasible, as it would
require a *deep* comparison of memslots, e.g. to verify that not only are
the memslot identical, but what the memslots point at is also identical.

Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration")
Cc: stable@vger.kernel.org
Reported-by: Stefan Teodorescu <fane@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260923163721.1584779-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 882 insertions, 0 deletions

diff --git a/io_uring/opdef.c b/io_uring/opdef.c
new file mode 100644
index 000000000..cf3aa2242
--- /dev/null
+++ b/io_uring/opdef.c
@@ -0,0 +1,882 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * io_uring opcode handling table
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/io_uring.h>
+#include <linux/io_uring/cmd.h>
+
+#include "io_uring.h"
+#include "opdef.h"
+#include "refs.h"
+#include "tctx.h"
+#include "sqpoll.h"
+#include "fdinfo.h"
+#include "kbuf.h"
+#include "rsrc.h"
+
+#include "xattr.h"
+#include "nop.h"
+#include "fs.h"
+#include "splice.h"
+#include "sync.h"
+#include "advise.h"
+#include "openclose.h"
+#include "uring_cmd.h"
+#include "epoll.h"
+#include "statx.h"
+#include "net.h"
+#include "msg_ring.h"
+#include "timeout.h"
+#include "poll.h"
+#include "cancel.h"
+#include "rw.h"
+#include "waitid.h"
+#include "futex.h"
+#include "truncate.h"
+#include "zcrx.h"
+
+static int io_no_issue(struct io_kiocb *req, unsigned int issue_flags)
+{
+	WARN_ON_ONCE(1);
+	return -ECANCELED;
+}
+
+static __maybe_unused int io_eopnotsupp_prep(struct io_kiocb *kiocb,
+					     const struct io_uring_sqe *sqe)
+{
+	return -EOPNOTSUPP;
+}
+
+const struct io_issue_def io_issue_defs[] = {
+	[IORING_OP_NOP] = {
+		.audit_skip		= 1,
+		.iopoll			= 1,
+		.prep			= io_nop_prep,
+		.issue			= io_nop,
+	},
+	[IORING_OP_READV] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.buffer_select		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.vectored		= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_readv,
+		.issue			= io_read,
+	},
+	[IORING_OP_WRITEV] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.vectored		= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_writev,
+		.issue			= io_write,
+	},
+	[IORING_OP_FSYNC] = {
+		.needs_file		= 1,
+		.audit_skip		= 1,
+		.prep			= io_fsync_prep,
+		.issue			= io_fsync,
+	},
+	[IORING_OP_READ_FIXED] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_read_fixed,
+		.issue			= io_read_fixed,
+	},
+	[IORING_OP_WRITE_FIXED] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_write_fixed,
+		.issue			= io_write_fixed,
+	},
+	[IORING_OP_POLL_ADD] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.audit_skip		= 1,
+		.prep			= io_poll_add_prep,
+		.issue			= io_poll_add,
+	},
+	[IORING_OP_POLL_REMOVE] = {
+		.audit_skip		= 1,
+		.prep			= io_poll_remove_prep,
+		.issue			= io_poll_remove,
+	},
+	[IORING_OP_SYNC_FILE_RANGE] = {
+		.needs_file		= 1,
+		.audit_skip		= 1,
+		.prep			= io_sfr_prep,
+		.issue			= io_sync_file_range,
+	},
+	[IORING_OP_SENDMSG] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_sendmsg_prep,
+		.issue			= io_sendmsg,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_RECVMSG] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.buffer_select		= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_recvmsg_prep,
+		.issue			= io_recvmsg,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_TIMEOUT] = {
+		.audit_skip		= 1,
+		.async_size		= sizeof(struct io_timeout_data),
+		.prep			= io_timeout_prep,
+		.issue			= io_timeout,
+	},
+	[IORING_OP_TIMEOUT_REMOVE] = {
+		/* used by timeout updates' prep() */
+		.audit_skip		= 1,
+		.prep			= io_timeout_remove_prep,
+		.issue			= io_timeout_remove,
+	},
+	[IORING_OP_ACCEPT] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.poll_exclusive		= 1,
+		.ioprio			= 1,	/* used for flags */
+#if defined(CONFIG_NET)
+		.prep			= io_accept_prep,
+		.issue			= io_accept,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_ASYNC_CANCEL] = {
+		.audit_skip		= 1,
+		.prep			= io_async_cancel_prep,
+		.issue			= io_async_cancel,
+	},
+	[IORING_OP_LINK_TIMEOUT] = {
+		.audit_skip		= 1,
+		.async_size		= sizeof(struct io_timeout_data),
+		.prep			= io_link_timeout_prep,
+		.issue			= io_no_issue,
+	},
+	[IORING_OP_CONNECT] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+#if defined(CONFIG_NET)
+		.filter_pdu_size	= sizeof_field(struct io_uring_bpf_ctx, connect),
+		.async_size		= sizeof(struct sockaddr_storage),
+		.prep			= io_connect_prep,
+		.issue			= io_connect,
+		.filter_populate	= io_connect_bpf_populate,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_FALLOCATE] = {
+		.needs_file		= 1,
+		.hash_reg_file          = 1,
+		.prep			= io_fallocate_prep,
+		.issue			= io_fallocate,
+	},
+	[IORING_OP_OPENAT] = {
+		.filter_pdu_size	= sizeof_field(struct io_uring_bpf_ctx, open),
+		.prep			= io_openat_prep,
+		.issue			= io_openat,
+		.filter_populate	= io_openat_bpf_populate,
+	},
+	[IORING_OP_CLOSE] = {
+		.prep			= io_close_prep,
+		.issue			= io_close,
+	},
+	[IORING_OP_FILES_UPDATE] = {
+		.audit_skip		= 1,
+		.iopoll			= 1,
+		.prep			= io_files_update_prep,
+		.issue			= io_files_update,
+	},
+	[IORING_OP_STATX] = {
+		.audit_skip		= 1,
+		.prep			= io_statx_prep,
+		.issue			= io_statx,
+	},
+	[IORING_OP_READ] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.buffer_select		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_read,
+		.issue			= io_read,
+	},
+	[IORING_OP_WRITE] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_write,
+		.issue			= io_write,
+	},
+	[IORING_OP_FADVISE] = {
+		.needs_file		= 1,
+		.audit_skip		= 1,
+		.prep			= io_fadvise_prep,
+		.issue			= io_fadvise,
+	},
+	[IORING_OP_MADVISE] = {
+		.audit_skip		= 1,
+		.prep			= io_madvise_prep,
+		.issue			= io_madvise,
+	},
+	[IORING_OP_SEND] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.buffer_select		= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_sendmsg_prep,
+		.issue			= io_send,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_RECV] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.buffer_select		= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_recvmsg_prep,
+		.issue			= io_recv,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_OPENAT2] = {
+		.filter_pdu_size	= sizeof_field(struct io_uring_bpf_ctx, open),
+		.prep			= io_openat2_prep,
+		.issue			= io_openat2,
+		.filter_populate	= io_openat_bpf_populate,
+	},
+	[IORING_OP_EPOLL_CTL] = {
+		.unbound_nonreg_file	= 1,
+		.audit_skip		= 1,
+#if defined(CONFIG_EPOLL)
+		.prep			= io_epoll_ctl_prep,
+		.issue			= io_epoll_ctl,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_SPLICE] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.audit_skip		= 1,
+		.prep			= io_splice_prep,
+		.issue			= io_splice,
+	},
+	[IORING_OP_PROVIDE_BUFFERS] = {
+		.audit_skip		= 1,
+		.iopoll			= 1,
+		.prep			= io_provide_buffers_prep,
+		.issue			= io_manage_buffers_legacy,
+	},
+	[IORING_OP_REMOVE_BUFFERS] = {
+		.audit_skip		= 1,
+		.iopoll			= 1,
+		.prep			= io_remove_buffers_prep,
+		.issue			= io_manage_buffers_legacy,
+	},
+	[IORING_OP_TEE] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.audit_skip		= 1,
+		.prep			= io_tee_prep,
+		.issue			= io_tee,
+	},
+	[IORING_OP_SHUTDOWN] = {
+		.needs_file		= 1,
+#if defined(CONFIG_NET)
+		.prep			= io_shutdown_prep,
+		.issue			= io_shutdown,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_RENAMEAT] = {
+		.prep			= io_renameat_prep,
+		.issue			= io_renameat,
+	},
+	[IORING_OP_UNLINKAT] = {
+		.prep			= io_unlinkat_prep,
+		.issue			= io_unlinkat,
+	},
+	[IORING_OP_MKDIRAT] = {
+		.prep			= io_mkdirat_prep,
+		.issue			= io_mkdirat,
+	},
+	[IORING_OP_SYMLINKAT] = {
+		.prep			= io_symlinkat_prep,
+		.issue			= io_symlinkat,
+	},
+	[IORING_OP_LINKAT] = {
+		.prep			= io_linkat_prep,
+		.issue			= io_linkat,
+	},
+	[IORING_OP_MSG_RING] = {
+		.needs_file		= 1,
+		.iopoll			= 1,
+		.prep			= io_msg_ring_prep,
+		.issue			= io_msg_ring,
+	},
+	[IORING_OP_FSETXATTR] = {
+		.needs_file = 1,
+		.prep			= io_fsetxattr_prep,
+		.issue			= io_fsetxattr,
+	},
+	[IORING_OP_SETXATTR] = {
+		.prep			= io_setxattr_prep,
+		.issue			= io_setxattr,
+	},
+	[IORING_OP_FGETXATTR] = {
+		.needs_file = 1,
+		.prep			= io_fgetxattr_prep,
+		.issue			= io_fgetxattr,
+	},
+	[IORING_OP_GETXATTR] = {
+		.prep			= io_getxattr_prep,
+		.issue			= io_getxattr,
+	},
+	[IORING_OP_SOCKET] = {
+		.audit_skip		= 1,
+#if defined(CONFIG_NET)
+		.filter_pdu_size	= sizeof_field(struct io_uring_bpf_ctx, socket),
+		.prep			= io_socket_prep,
+		.issue			= io_socket,
+		.filter_populate	= io_socket_bpf_populate,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_URING_CMD] = {
+		.buffer_select		= 1,
+		.needs_file		= 1,
+		.plug			= 1,
+		.iopoll			= 1,
+		.async_size		= sizeof(struct io_async_cmd),
+		.prep			= io_uring_cmd_prep,
+		.issue			= io_uring_cmd,
+	},
+	[IORING_OP_SEND_ZC] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_send_zc_prep,
+		.issue			= io_sendmsg_zc,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_SENDMSG_ZC] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.async_size		= sizeof(struct io_async_msghdr),
+		.prep			= io_send_zc_prep,
+		.issue			= io_sendmsg_zc,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_READ_MULTISHOT] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.buffer_select		= 1,
+		.audit_skip		= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_read_mshot_prep,
+		.issue			= io_read_mshot,
+	},
+	[IORING_OP_WAITID] = {
+		.async_size		= sizeof(struct io_waitid_async),
+		.prep			= io_waitid_prep,
+		.issue			= io_waitid,
+	},
+	[IORING_OP_FUTEX_WAIT] = {
+#if defined(CONFIG_FUTEX)
+		.prep			= io_futex_wait_prep,
+		.issue			= io_futex_wait,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_FUTEX_WAKE] = {
+#if defined(CONFIG_FUTEX)
+		.prep			= io_futex_prep,
+		.issue			= io_futex_wake,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_FUTEX_WAITV] = {
+#if defined(CONFIG_FUTEX)
+		.prep			= io_futexv_prep,
+		.issue			= io_futexv_wait,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_FIXED_FD_INSTALL] = {
+		.needs_file		= 1,
+		.prep			= io_install_fixed_fd_prep,
+		.issue			= io_install_fixed_fd,
+	},
+	[IORING_OP_FTRUNCATE] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.prep			= io_ftruncate_prep,
+		.issue			= io_ftruncate,
+	},
+	[IORING_OP_BIND] = {
+#if defined(CONFIG_NET)
+		.needs_file		= 1,
+		.prep			= io_bind_prep,
+		.issue			= io_bind,
+		.async_size		= sizeof(struct sockaddr_storage),
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_LISTEN] = {
+#if defined(CONFIG_NET)
+		.needs_file		= 1,
+		.prep			= io_listen_prep,
+		.issue			= io_listen,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_RECV_ZC] = {
+		.audit_skip		= 1,
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.ioprio			= 1,
+#if defined(CONFIG_NET)
+		.prep			= io_recvzc_prep,
+		.issue			= io_recvzc,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_EPOLL_WAIT] = {
+		.needs_file		= 1,
+		.audit_skip		= 1,
+		.pollin			= 1,
+#if defined(CONFIG_EPOLL)
+		.prep			= io_epoll_wait_prep,
+		.issue			= io_epoll_wait,
+#else
+		.prep			= io_eopnotsupp_prep,
+#endif
+	},
+	[IORING_OP_READV_FIXED] = {
+		.needs_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollin			= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.vectored		= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_readv_fixed,
+		.issue			= io_read,
+	},
+	[IORING_OP_WRITEV_FIXED] = {
+		.needs_file		= 1,
+		.hash_reg_file		= 1,
+		.unbound_nonreg_file	= 1,
+		.pollout		= 1,
+		.plug			= 1,
+		.audit_skip		= 1,
+		.ioprio			= 1,
+		.iopoll			= 1,
+		.vectored		= 1,
+		.async_size		= sizeof(struct io_async_rw),
+		.prep			= io_prep_writev_fixed,
+		.issue			= io_write,
+	},
+	[IORING_OP_PIPE] = {
+		.prep			= io_pipe_prep,
+		.issue			= io_pipe,
+	},
+	[IORING_OP_NOP128] = {
+		.audit_skip		= 1,
+		.iopoll			= 1,
+		.is_128			= 1,
+		.prep			= io_nop_prep,
+		.issue			= io_nop,
+	},
+	[IORING_OP_URING_CMD128] = {
+		.buffer_select		= 1,
+		.needs_file		= 1,
+		.plug			= 1,
+		.iopoll			= 1,
+		.is_128			= 1,
+		.async_size		= sizeof(struct io_async_cmd),
+		.prep			= io_uring_cmd_prep,
+		.issue			= io_uring_cmd,
+	},
+};
+
+const struct io_cold_def io_cold_defs[] = {
+	[IORING_OP_NOP] = {
+		.name			= "NOP",
+	},
+	[IORING_OP_READV] = {
+		.name			= "READV",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_WRITEV] = {
+		.name			= "WRITEV",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_FSYNC] = {
+		.name			= "FSYNC",
+	},
+	[IORING_OP_READ_FIXED] = {
+		.name			= "READ_FIXED",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_WRITE_FIXED] = {
+		.name			= "WRITE_FIXED",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_POLL_ADD] = {
+		.name			= "POLL_ADD",
+	},
+	[IORING_OP_POLL_REMOVE] = {
+		.name			= "POLL_REMOVE",
+	},
+	[IORING_OP_SYNC_FILE_RANGE] = {
+		.name			= "SYNC_FILE_RANGE",
+	},
+	[IORING_OP_SENDMSG] = {
+		.name			= "SENDMSG",
+#if defined(CONFIG_NET)
+		.cleanup		= io_sendmsg_recvmsg_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_RECVMSG] = {
+		.name			= "RECVMSG",
+#if defined(CONFIG_NET)
+		.cleanup		= io_sendmsg_recvmsg_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_TIMEOUT] = {
+		.name			= "TIMEOUT",
+	},
+	[IORING_OP_TIMEOUT_REMOVE] = {
+		.name			= "TIMEOUT_REMOVE",
+	},
+	[IORING_OP_ACCEPT] = {
+		.name			= "ACCEPT",
+	},
+	[IORING_OP_ASYNC_CANCEL] = {
+		.name			= "ASYNC_CANCEL",
+	},
+	[IORING_OP_LINK_TIMEOUT] = {
+		.name			= "LINK_TIMEOUT",
+	},
+	[IORING_OP_CONNECT] = {
+		.name			= "CONNECT",
+	},
+	[IORING_OP_FALLOCATE] = {
+		.name			= "FALLOCATE",
+	},
+	[IORING_OP_OPENAT] = {
+		.name			= "OPENAT",
+		.cleanup		= io_open_cleanup,
+	},
+	[IORING_OP_CLOSE] = {
+		.name			= "CLOSE",
+	},
+	[IORING_OP_FILES_UPDATE] = {
+		.name			= "FILES_UPDATE",
+	},
+	[IORING_OP_STATX] = {
+		.name			= "STATX",
+		.cleanup		= io_statx_cleanup,
+	},
+	[IORING_OP_READ] = {
+		.name			= "READ",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_WRITE] = {
+		.name			= "WRITE",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_FADVISE] = {
+		.name			= "FADVISE",
+	},
+	[IORING_OP_MADVISE] = {
+		.name			= "MADVISE",
+	},
+	[IORING_OP_SEND] = {
+		.name			= "SEND",
+#if defined(CONFIG_NET)
+		.cleanup		= io_sendmsg_recvmsg_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_RECV] = {
+		.name			= "RECV",
+#if defined(CONFIG_NET)
+		.cleanup		= io_sendmsg_recvmsg_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_OPENAT2] = {
+		.name			= "OPENAT2",
+		.cleanup		= io_open_cleanup,
+	},
+	[IORING_OP_EPOLL_CTL] = {
+		.name			= "EPOLL",
+	},
+	[IORING_OP_SPLICE] = {
+		.name			= "SPLICE",
+		.cleanup		= io_splice_cleanup,
+	},
+	[IORING_OP_PROVIDE_BUFFERS] = {
+		.name			= "PROVIDE_BUFFERS",
+	},
+	[IORING_OP_REMOVE_BUFFERS] = {
+		.name			= "REMOVE_BUFFERS",
+	},
+	[IORING_OP_TEE] = {
+		.name			= "TEE",
+		.cleanup		= io_splice_cleanup,
+	},
+	[IORING_OP_SHUTDOWN] = {
+		.name			= "SHUTDOWN",
+	},
+	[IORING_OP_RENAMEAT] = {
+		.name			= "RENAMEAT",
+		.cleanup		= io_renameat_cleanup,
+	},
+	[IORING_OP_UNLINKAT] = {
+		.name			= "UNLINKAT",
+		.cleanup		= io_unlinkat_cleanup,
+	},
+	[IORING_OP_MKDIRAT] = {
+		.name			= "MKDIRAT",
+		.cleanup		= io_mkdirat_cleanup,
+	},
+	[IORING_OP_SYMLINKAT] = {
+		.name			= "SYMLINKAT",
+		.cleanup		= io_link_cleanup,
+	},
+	[IORING_OP_LINKAT] = {
+		.name			= "LINKAT",
+		.cleanup		= io_link_cleanup,
+	},
+	[IORING_OP_MSG_RING] = {
+		.name			= "MSG_RING",
+		.cleanup		= io_msg_ring_cleanup,
+	},
+	[IORING_OP_FSETXATTR] = {
+		.name			= "FSETXATTR",
+		.cleanup		= io_xattr_cleanup,
+	},
+	[IORING_OP_SETXATTR] = {
+		.name			= "SETXATTR",
+		.cleanup		= io_xattr_cleanup,
+	},
+	[IORING_OP_FGETXATTR] = {
+		.name			= "FGETXATTR",
+		.cleanup		= io_xattr_cleanup,
+	},
+	[IORING_OP_GETXATTR] = {
+		.name			= "GETXATTR",
+		.cleanup		= io_xattr_cleanup,
+	},
+	[IORING_OP_SOCKET] = {
+		.name			= "SOCKET",
+	},
+	[IORING_OP_URING_CMD] = {
+		.name			= "URING_CMD",
+		.sqe_copy		= io_uring_cmd_sqe_copy,
+		.cleanup		= io_uring_cmd_cleanup,
+	},
+	[IORING_OP_SEND_ZC] = {
+		.name			= "SEND_ZC",
+#if defined(CONFIG_NET)
+		.cleanup		= io_send_zc_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_SENDMSG_ZC] = {
+		.name			= "SENDMSG_ZC",
+#if defined(CONFIG_NET)
+		.cleanup		= io_send_zc_cleanup,
+		.fail			= io_sendrecv_fail,
+#endif
+	},
+	[IORING_OP_READ_MULTISHOT] = {
+		.name			= "READ_MULTISHOT",
+		.cleanup		= io_readv_writev_cleanup,
+	},
+	[IORING_OP_WAITID] = {
+		.name			= "WAITID",
+	},
+	[IORING_OP_FUTEX_WAIT] = {
+		.name			= "FUTEX_WAIT",
+	},
+	[IORING_OP_FUTEX_WAKE] = {
+		.name			= "FUTEX_WAKE",
+	},
+	[IORING_OP_FUTEX_WAITV] = {
+		.name			= "FUTEX_WAITV",
+	},
+	[IORING_OP_FIXED_FD_INSTALL] = {
+		.name			= "FIXED_FD_INSTALL",
+	},
+	[IORING_OP_FTRUNCATE] = {
+		.name			= "FTRUNCATE",
+	},
+	[IORING_OP_BIND] = {
+		.name			= "BIND",
+	},
+	[IORING_OP_LISTEN] = {
+		.name			= "LISTEN",
+	},
+	[IORING_OP_RECV_ZC] = {
+		.name			= "RECV_ZC",
+	},
+	[IORING_OP_EPOLL_WAIT] = {
+		.name			= "EPOLL_WAIT",
+	},
+	[IORING_OP_READV_FIXED] = {
+		.name			= "READV_FIXED",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_WRITEV_FIXED] = {
+		.name			= "WRITEV_FIXED",
+		.cleanup		= io_readv_writev_cleanup,
+		.fail			= io_rw_fail,
+	},
+	[IORING_OP_PIPE] = {
+		.name			= "PIPE",
+	},
+	[IORING_OP_NOP128] = {
+		.name			= "NOP128",
+	},
+	[IORING_OP_URING_CMD128] = {
+		.name			= "URING_CMD128",
+		.sqe_copy		= io_uring_cmd_sqe_copy,
+		.cleanup		= io_uring_cmd_cleanup,
+	},
+};
+
+const char *io_uring_get_opcode(u8 opcode)
+{
+	if (opcode < IORING_OP_LAST)
+		return io_cold_defs[opcode].name;
+	return "INVALID";
+}
+
+bool io_uring_op_supported(u8 opcode)
+{
+	if (opcode < IORING_OP_LAST &&
+	    io_issue_defs[opcode].prep != io_eopnotsupp_prep)
+		return true;
+	return false;
+}
+
+void __init io_uring_optable_init(void)
+{
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(io_cold_defs) != IORING_OP_LAST);
+	BUILD_BUG_ON(ARRAY_SIZE(io_issue_defs) != IORING_OP_LAST);
+
+	for (i = 0; i < ARRAY_SIZE(io_issue_defs); i++) {
+		BUG_ON(!io_issue_defs[i].prep);
+		if (io_issue_defs[i].prep != io_eopnotsupp_prep)
+			BUG_ON(!io_issue_defs[i].issue);
+		WARN_ON_ONCE(!io_cold_defs[i].name);
+	}
+}