1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel-based Virtual Machine driver for Linux
7 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
10 #include <linux/kvm_types.h>
11 #include <linux/kvm_host.h>
12 #include <linux/kernel.h>
13 #include <linux/highmem.h>
14 #include <linux/psp-sev.h>
15 #include <linux/pagemap.h>
16 #include <linux/swap.h>
17 #include <linux/processor.h>
18 #include <linux/trace_events.h>
25 static u8 sev_enc_bit;
26 static int sev_flush_asids(void);
27 static DECLARE_RWSEM(sev_deactivate_lock);
28 static DEFINE_MUTEX(sev_bitmap_lock);
29 unsigned int max_sev_asid;
30 static unsigned int min_sev_asid;
31 static unsigned long *sev_asid_bitmap;
32 static unsigned long *sev_reclaim_asid_bitmap;
33 #define __sme_page_pa(x) __sme_set(page_to_pfn(x) << PAGE_SHIFT)
36 struct list_head list;
43 static int sev_flush_asids(void)
48 * DEACTIVATE will clear the WBINVD indicator causing DF_FLUSH to fail,
49 * so it must be guarded.
51 down_write(&sev_deactivate_lock);
54 ret = sev_guest_df_flush(&error);
56 up_write(&sev_deactivate_lock);
59 pr_err("SEV: DF_FLUSH failed, ret=%d, error=%#x\n", ret, error);
64 /* Must be called with the sev_bitmap_lock held */
65 static bool __sev_recycle_asids(void)
69 /* Check if there are any ASIDs to reclaim before performing a flush */
70 pos = find_next_bit(sev_reclaim_asid_bitmap,
71 max_sev_asid, min_sev_asid - 1);
72 if (pos >= max_sev_asid)
75 if (sev_flush_asids())
78 bitmap_xor(sev_asid_bitmap, sev_asid_bitmap, sev_reclaim_asid_bitmap,
80 bitmap_zero(sev_reclaim_asid_bitmap, max_sev_asid);
85 static int sev_asid_new(void)
90 mutex_lock(&sev_bitmap_lock);
93 * SEV-enabled guest must use asid from min_sev_asid to max_sev_asid.
96 pos = find_next_zero_bit(sev_asid_bitmap, max_sev_asid, min_sev_asid - 1);
97 if (pos >= max_sev_asid) {
98 if (retry && __sev_recycle_asids()) {
102 mutex_unlock(&sev_bitmap_lock);
106 __set_bit(pos, sev_asid_bitmap);
108 mutex_unlock(&sev_bitmap_lock);
113 static int sev_get_asid(struct kvm *kvm)
115 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
120 static void sev_asid_free(int asid)
122 struct svm_cpu_data *sd;
125 mutex_lock(&sev_bitmap_lock);
128 __set_bit(pos, sev_reclaim_asid_bitmap);
130 for_each_possible_cpu(cpu) {
131 sd = per_cpu(svm_data, cpu);
132 sd->sev_vmcbs[pos] = NULL;
135 mutex_unlock(&sev_bitmap_lock);
138 static void sev_unbind_asid(struct kvm *kvm, unsigned int handle)
140 struct sev_data_decommission *decommission;
141 struct sev_data_deactivate *data;
146 data = kzalloc(sizeof(*data), GFP_KERNEL);
150 /* deactivate handle */
151 data->handle = handle;
153 /* Guard DEACTIVATE against WBINVD/DF_FLUSH used in ASID recycling */
154 down_read(&sev_deactivate_lock);
155 sev_guest_deactivate(data, NULL);
156 up_read(&sev_deactivate_lock);
160 decommission = kzalloc(sizeof(*decommission), GFP_KERNEL);
164 /* decommission handle */
165 decommission->handle = handle;
166 sev_guest_decommission(decommission, NULL);
171 static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
173 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
177 if (unlikely(sev->active))
180 asid = sev_asid_new();
184 ret = sev_platform_init(&argp->error);
190 INIT_LIST_HEAD(&sev->regions_list);
199 static int sev_bind_asid(struct kvm *kvm, unsigned int handle, int *error)
201 struct sev_data_activate *data;
202 int asid = sev_get_asid(kvm);
205 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
209 /* activate ASID on the given handle */
210 data->handle = handle;
212 ret = sev_guest_activate(data, error);
218 static int __sev_issue_cmd(int fd, int id, void *data, int *error)
227 ret = sev_issue_cmd_external_user(f.file, id, data, error);
233 static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
235 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
237 return __sev_issue_cmd(sev->fd, id, data, error);
240 static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
242 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
243 struct sev_data_launch_start *start;
244 struct kvm_sev_launch_start params;
245 void *dh_blob, *session_blob;
246 int *error = &argp->error;
252 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
255 start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
260 if (params.dh_uaddr) {
261 dh_blob = psp_copy_user_blob(params.dh_uaddr, params.dh_len);
262 if (IS_ERR(dh_blob)) {
263 ret = PTR_ERR(dh_blob);
267 start->dh_cert_address = __sme_set(__pa(dh_blob));
268 start->dh_cert_len = params.dh_len;
272 if (params.session_uaddr) {
273 session_blob = psp_copy_user_blob(params.session_uaddr, params.session_len);
274 if (IS_ERR(session_blob)) {
275 ret = PTR_ERR(session_blob);
279 start->session_address = __sme_set(__pa(session_blob));
280 start->session_len = params.session_len;
283 start->handle = params.handle;
284 start->policy = params.policy;
286 /* create memory encryption context */
287 ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
291 /* Bind ASID to this guest */
292 ret = sev_bind_asid(kvm, start->handle, error);
296 /* return handle to userspace */
297 params.handle = start->handle;
298 if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms, sizeof(params))) {
299 sev_unbind_asid(kvm, start->handle);
304 sev->handle = start->handle;
305 sev->fd = argp->sev_fd;
316 static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
317 unsigned long ulen, unsigned long *n,
320 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
321 unsigned long npages, size;
323 unsigned long locked, lock_limit;
325 unsigned long first, last;
328 if (ulen == 0 || uaddr + ulen < uaddr)
329 return ERR_PTR(-EINVAL);
331 /* Calculate number of pages. */
332 first = (uaddr & PAGE_MASK) >> PAGE_SHIFT;
333 last = ((uaddr + ulen - 1) & PAGE_MASK) >> PAGE_SHIFT;
334 npages = (last - first + 1);
336 locked = sev->pages_locked + npages;
337 lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
338 if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
339 pr_err("SEV: %lu locked pages exceed the lock limit of %lu.\n", locked, lock_limit);
340 return ERR_PTR(-ENOMEM);
343 if (WARN_ON_ONCE(npages > INT_MAX))
344 return ERR_PTR(-EINVAL);
346 /* Avoid using vmalloc for smaller buffers. */
347 size = npages * sizeof(struct page *);
348 if (size > PAGE_SIZE)
349 pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
351 pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
354 return ERR_PTR(-ENOMEM);
356 /* Pin the user virtual address. */
357 npinned = pin_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages);
358 if (npinned != npages) {
359 pr_err("SEV: Failure locking %lu pages.\n", npages);
365 sev->pages_locked = locked;
371 unpin_user_pages(pages, npinned);
377 static void sev_unpin_memory(struct kvm *kvm, struct page **pages,
378 unsigned long npages)
380 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
382 unpin_user_pages(pages, npages);
384 sev->pages_locked -= npages;
387 static void sev_clflush_pages(struct page *pages[], unsigned long npages)
389 uint8_t *page_virtual;
392 if (this_cpu_has(X86_FEATURE_SME_COHERENT) || npages == 0 ||
396 for (i = 0; i < npages; i++) {
397 page_virtual = kmap_atomic(pages[i]);
398 clflush_cache_range(page_virtual, PAGE_SIZE);
399 kunmap_atomic(page_virtual);
403 static unsigned long get_num_contig_pages(unsigned long idx,
404 struct page **inpages, unsigned long npages)
406 unsigned long paddr, next_paddr;
407 unsigned long i = idx + 1, pages = 1;
409 /* find the number of contiguous pages starting from idx */
410 paddr = __sme_page_pa(inpages[idx]);
412 next_paddr = __sme_page_pa(inpages[i++]);
413 if ((paddr + PAGE_SIZE) == next_paddr) {
424 static int sev_launch_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp)
426 unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
427 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
428 struct kvm_sev_launch_update_data params;
429 struct sev_data_launch_update_data *data;
430 struct page **inpages;
436 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
439 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
443 vaddr = params.uaddr;
445 vaddr_end = vaddr + size;
447 /* Lock the user memory. */
448 inpages = sev_pin_memory(kvm, vaddr, size, &npages, 1);
449 if (IS_ERR(inpages)) {
450 ret = PTR_ERR(inpages);
455 * Flush (on non-coherent CPUs) before LAUNCH_UPDATE encrypts pages in
456 * place; the cache may contain the data that was written unencrypted.
458 sev_clflush_pages(inpages, npages);
460 for (i = 0; vaddr < vaddr_end; vaddr = next_vaddr, i += pages) {
464 * If the user buffer is not page-aligned, calculate the offset
467 offset = vaddr & (PAGE_SIZE - 1);
469 /* Calculate the number of pages that can be encrypted in one go. */
470 pages = get_num_contig_pages(i, inpages, npages);
472 len = min_t(size_t, ((pages * PAGE_SIZE) - offset), size);
474 data->handle = sev->handle;
476 data->address = __sme_page_pa(inpages[i]) + offset;
477 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_DATA, data, &argp->error);
482 next_vaddr = vaddr + len;
486 /* content of memory is updated, mark pages dirty */
487 for (i = 0; i < npages; i++) {
488 set_page_dirty_lock(inpages[i]);
489 mark_page_accessed(inpages[i]);
491 /* unlock the user pages */
492 sev_unpin_memory(kvm, inpages, npages);
498 static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
500 void __user *measure = (void __user *)(uintptr_t)argp->data;
501 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
502 struct sev_data_launch_measure *data;
503 struct kvm_sev_launch_measure params;
504 void __user *p = NULL;
511 if (copy_from_user(¶ms, measure, sizeof(params)))
514 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
518 /* User wants to query the blob length */
522 p = (void __user *)(uintptr_t)params.uaddr;
524 if (params.len > SEV_FW_BLOB_MAX_SIZE) {
530 blob = kmalloc(params.len, GFP_KERNEL);
534 data->address = __psp_pa(blob);
535 data->len = params.len;
539 data->handle = sev->handle;
540 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_MEASURE, data, &argp->error);
543 * If we query the session length, FW responded with expected data.
552 if (copy_to_user(p, blob, params.len))
557 params.len = data->len;
558 if (copy_to_user(measure, ¶ms, sizeof(params)))
567 static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
569 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
570 struct sev_data_launch_finish *data;
576 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
580 data->handle = sev->handle;
581 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_FINISH, data, &argp->error);
587 static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
589 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
590 struct kvm_sev_guest_status params;
591 struct sev_data_guest_status *data;
597 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
601 data->handle = sev->handle;
602 ret = sev_issue_cmd(kvm, SEV_CMD_GUEST_STATUS, data, &argp->error);
606 params.policy = data->policy;
607 params.state = data->state;
608 params.handle = data->handle;
610 if (copy_to_user((void __user *)(uintptr_t)argp->data, ¶ms, sizeof(params)))
617 static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
618 unsigned long dst, int size,
619 int *error, bool enc)
621 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
622 struct sev_data_dbg *data;
625 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
629 data->handle = sev->handle;
630 data->dst_addr = dst;
631 data->src_addr = src;
634 ret = sev_issue_cmd(kvm,
635 enc ? SEV_CMD_DBG_ENCRYPT : SEV_CMD_DBG_DECRYPT,
641 static int __sev_dbg_decrypt(struct kvm *kvm, unsigned long src_paddr,
642 unsigned long dst_paddr, int sz, int *err)
647 * Its safe to read more than we are asked, caller should ensure that
648 * destination has enough space.
650 src_paddr = round_down(src_paddr, 16);
651 offset = src_paddr & 15;
652 sz = round_up(sz + offset, 16);
654 return __sev_issue_dbg_cmd(kvm, src_paddr, dst_paddr, sz, err, false);
657 static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr,
658 unsigned long __user dst_uaddr,
659 unsigned long dst_paddr,
662 struct page *tpage = NULL;
665 /* if inputs are not 16-byte then use intermediate buffer */
666 if (!IS_ALIGNED(dst_paddr, 16) ||
667 !IS_ALIGNED(paddr, 16) ||
668 !IS_ALIGNED(size, 16)) {
669 tpage = (void *)alloc_page(GFP_KERNEL);
673 dst_paddr = __sme_page_pa(tpage);
676 ret = __sev_dbg_decrypt(kvm, paddr, dst_paddr, size, err);
682 if (copy_to_user((void __user *)(uintptr_t)dst_uaddr,
683 page_address(tpage) + offset, size))
694 static int __sev_dbg_encrypt_user(struct kvm *kvm, unsigned long paddr,
695 unsigned long __user vaddr,
696 unsigned long dst_paddr,
697 unsigned long __user dst_vaddr,
698 int size, int *error)
700 struct page *src_tpage = NULL;
701 struct page *dst_tpage = NULL;
704 /* If source buffer is not aligned then use an intermediate buffer */
705 if (!IS_ALIGNED(vaddr, 16)) {
706 src_tpage = alloc_page(GFP_KERNEL);
710 if (copy_from_user(page_address(src_tpage),
711 (void __user *)(uintptr_t)vaddr, size)) {
712 __free_page(src_tpage);
716 paddr = __sme_page_pa(src_tpage);
720 * If destination buffer or length is not aligned then do read-modify-write:
721 * - decrypt destination in an intermediate buffer
722 * - copy the source buffer in an intermediate buffer
723 * - use the intermediate buffer as source buffer
725 if (!IS_ALIGNED(dst_vaddr, 16) || !IS_ALIGNED(size, 16)) {
728 dst_tpage = alloc_page(GFP_KERNEL);
734 ret = __sev_dbg_decrypt(kvm, dst_paddr,
735 __sme_page_pa(dst_tpage), size, error);
740 * If source is kernel buffer then use memcpy() otherwise
743 dst_offset = dst_paddr & 15;
746 memcpy(page_address(dst_tpage) + dst_offset,
747 page_address(src_tpage), size);
749 if (copy_from_user(page_address(dst_tpage) + dst_offset,
750 (void __user *)(uintptr_t)vaddr, size)) {
756 paddr = __sme_page_pa(dst_tpage);
757 dst_paddr = round_down(dst_paddr, 16);
758 len = round_up(size, 16);
761 ret = __sev_issue_dbg_cmd(kvm, paddr, dst_paddr, len, error, true);
765 __free_page(src_tpage);
767 __free_page(dst_tpage);
771 static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
773 unsigned long vaddr, vaddr_end, next_vaddr;
774 unsigned long dst_vaddr;
775 struct page **src_p, **dst_p;
776 struct kvm_sev_dbg debug;
784 if (copy_from_user(&debug, (void __user *)(uintptr_t)argp->data, sizeof(debug)))
787 if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
789 if (!debug.dst_uaddr)
792 vaddr = debug.src_uaddr;
794 vaddr_end = vaddr + size;
795 dst_vaddr = debug.dst_uaddr;
797 for (; vaddr < vaddr_end; vaddr = next_vaddr) {
798 int len, s_off, d_off;
800 /* lock userspace source and destination page */
801 src_p = sev_pin_memory(kvm, vaddr & PAGE_MASK, PAGE_SIZE, &n, 0);
803 return PTR_ERR(src_p);
805 dst_p = sev_pin_memory(kvm, dst_vaddr & PAGE_MASK, PAGE_SIZE, &n, 1);
807 sev_unpin_memory(kvm, src_p, n);
808 return PTR_ERR(dst_p);
812 * Flush (on non-coherent CPUs) before DBG_{DE,EN}CRYPT read or modify
813 * the pages; flush the destination too so that future accesses do not
816 sev_clflush_pages(src_p, 1);
817 sev_clflush_pages(dst_p, 1);
820 * Since user buffer may not be page aligned, calculate the
821 * offset within the page.
823 s_off = vaddr & ~PAGE_MASK;
824 d_off = dst_vaddr & ~PAGE_MASK;
825 len = min_t(size_t, (PAGE_SIZE - s_off), size);
828 ret = __sev_dbg_decrypt_user(kvm,
829 __sme_page_pa(src_p[0]) + s_off,
831 __sme_page_pa(dst_p[0]) + d_off,
834 ret = __sev_dbg_encrypt_user(kvm,
835 __sme_page_pa(src_p[0]) + s_off,
837 __sme_page_pa(dst_p[0]) + d_off,
841 sev_unpin_memory(kvm, src_p, n);
842 sev_unpin_memory(kvm, dst_p, n);
847 next_vaddr = vaddr + len;
848 dst_vaddr = dst_vaddr + len;
855 static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
857 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
858 struct sev_data_launch_secret *data;
859 struct kvm_sev_launch_secret params;
868 if (copy_from_user(¶ms, (void __user *)(uintptr_t)argp->data, sizeof(params)))
871 pages = sev_pin_memory(kvm, params.guest_uaddr, params.guest_len, &n, 1);
873 return PTR_ERR(pages);
876 * Flush (on non-coherent CPUs) before LAUNCH_SECRET encrypts pages in
877 * place; the cache may contain the data that was written unencrypted.
879 sev_clflush_pages(pages, n);
882 * The secret must be copied into contiguous memory region, lets verify
883 * that userspace memory pages are contiguous before we issue command.
885 if (get_num_contig_pages(0, pages, n) != n) {
891 data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
895 offset = params.guest_uaddr & (PAGE_SIZE - 1);
896 data->guest_address = __sme_page_pa(pages[0]) + offset;
897 data->guest_len = params.guest_len;
899 blob = psp_copy_user_blob(params.trans_uaddr, params.trans_len);
905 data->trans_address = __psp_pa(blob);
906 data->trans_len = params.trans_len;
908 hdr = psp_copy_user_blob(params.hdr_uaddr, params.hdr_len);
913 data->hdr_address = __psp_pa(hdr);
914 data->hdr_len = params.hdr_len;
916 data->handle = sev->handle;
917 ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_SECRET, data, &argp->error);
926 /* content of memory is updated, mark pages dirty */
927 for (i = 0; i < n; i++) {
928 set_page_dirty_lock(pages[i]);
929 mark_page_accessed(pages[i]);
931 sev_unpin_memory(kvm, pages, n);
935 int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
937 struct kvm_sev_cmd sev_cmd;
940 if (!svm_sev_enabled() || !sev)
946 if (copy_from_user(&sev_cmd, argp, sizeof(struct kvm_sev_cmd)))
949 mutex_lock(&kvm->lock);
951 switch (sev_cmd.id) {
953 r = sev_guest_init(kvm, &sev_cmd);
955 case KVM_SEV_LAUNCH_START:
956 r = sev_launch_start(kvm, &sev_cmd);
958 case KVM_SEV_LAUNCH_UPDATE_DATA:
959 r = sev_launch_update_data(kvm, &sev_cmd);
961 case KVM_SEV_LAUNCH_MEASURE:
962 r = sev_launch_measure(kvm, &sev_cmd);
964 case KVM_SEV_LAUNCH_FINISH:
965 r = sev_launch_finish(kvm, &sev_cmd);
967 case KVM_SEV_GUEST_STATUS:
968 r = sev_guest_status(kvm, &sev_cmd);
970 case KVM_SEV_DBG_DECRYPT:
971 r = sev_dbg_crypt(kvm, &sev_cmd, true);
973 case KVM_SEV_DBG_ENCRYPT:
974 r = sev_dbg_crypt(kvm, &sev_cmd, false);
976 case KVM_SEV_LAUNCH_SECRET:
977 r = sev_launch_secret(kvm, &sev_cmd);
984 if (copy_to_user(argp, &sev_cmd, sizeof(struct kvm_sev_cmd)))
988 mutex_unlock(&kvm->lock);
992 int svm_register_enc_region(struct kvm *kvm,
993 struct kvm_enc_region *range)
995 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
996 struct enc_region *region;
1002 if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
1005 region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
1009 region->pages = sev_pin_memory(kvm, range->addr, range->size, ®ion->npages, 1);
1010 if (IS_ERR(region->pages)) {
1011 ret = PTR_ERR(region->pages);
1016 * The guest may change the memory encryption attribute from C=0 -> C=1
1017 * or vice versa for this memory range. Lets make sure caches are
1018 * flushed to ensure that guest data gets written into memory with
1021 sev_clflush_pages(region->pages, region->npages);
1023 region->uaddr = range->addr;
1024 region->size = range->size;
1026 mutex_lock(&kvm->lock);
1027 list_add_tail(®ion->list, &sev->regions_list);
1028 mutex_unlock(&kvm->lock);
1037 static struct enc_region *
1038 find_enc_region(struct kvm *kvm, struct kvm_enc_region *range)
1040 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1041 struct list_head *head = &sev->regions_list;
1042 struct enc_region *i;
1044 list_for_each_entry(i, head, list) {
1045 if (i->uaddr == range->addr &&
1046 i->size == range->size)
1053 static void __unregister_enc_region_locked(struct kvm *kvm,
1054 struct enc_region *region)
1056 sev_unpin_memory(kvm, region->pages, region->npages);
1057 list_del(®ion->list);
1061 int svm_unregister_enc_region(struct kvm *kvm,
1062 struct kvm_enc_region *range)
1064 struct enc_region *region;
1067 mutex_lock(&kvm->lock);
1069 if (!sev_guest(kvm)) {
1074 region = find_enc_region(kvm, range);
1081 * Ensure that all guest tagged cache entries are flushed before
1082 * releasing the pages back to the system for use. CLFLUSH will
1083 * not do this, so issue a WBINVD.
1085 wbinvd_on_all_cpus();
1087 __unregister_enc_region_locked(kvm, region);
1089 mutex_unlock(&kvm->lock);
1093 mutex_unlock(&kvm->lock);
1097 void sev_vm_destroy(struct kvm *kvm)
1099 struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1100 struct list_head *head = &sev->regions_list;
1101 struct list_head *pos, *q;
1103 if (!sev_guest(kvm))
1106 mutex_lock(&kvm->lock);
1109 * Ensure that all guest tagged cache entries are flushed before
1110 * releasing the pages back to the system for use. CLFLUSH will
1111 * not do this, so issue a WBINVD.
1113 wbinvd_on_all_cpus();
1116 * if userspace was terminated before unregistering the memory regions
1117 * then lets unpin all the registered memory.
1119 if (!list_empty(head)) {
1120 list_for_each_safe(pos, q, head) {
1121 __unregister_enc_region_locked(kvm,
1122 list_entry(pos, struct enc_region, list));
1127 mutex_unlock(&kvm->lock);
1129 sev_unbind_asid(kvm, sev->handle);
1130 sev_asid_free(sev->asid);
1133 void __init sev_hardware_setup(void)
1135 unsigned int eax, ebx, ecx, edx;
1136 bool sev_es_supported = false;
1137 bool sev_supported = false;
1139 /* Does the CPU support SEV? */
1140 if (!boot_cpu_has(X86_FEATURE_SEV))
1143 /* Retrieve SEV CPUID information */
1144 cpuid(0x8000001f, &eax, &ebx, &ecx, &edx);
1146 /* Set encryption bit location for SEV-ES guests */
1147 sev_enc_bit = ebx & 0x3f;
1149 /* Maximum number of encrypted guests supported simultaneously */
1152 if (!svm_sev_enabled())
1155 /* Minimum ASID value that should be used for SEV guest */
1158 /* Initialize SEV ASID bitmaps */
1159 sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
1160 if (!sev_asid_bitmap)
1163 sev_reclaim_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
1164 if (!sev_reclaim_asid_bitmap)
1167 pr_info("SEV supported: %u ASIDs\n", max_sev_asid - min_sev_asid + 1);
1168 sev_supported = true;
1170 /* SEV-ES support requested? */
1174 /* Does the CPU support SEV-ES? */
1175 if (!boot_cpu_has(X86_FEATURE_SEV_ES))
1178 /* Has the system been allocated ASIDs for SEV-ES? */
1179 if (min_sev_asid == 1)
1182 pr_info("SEV-ES supported: %u ASIDs\n", min_sev_asid - 1);
1183 sev_es_supported = true;
1186 sev = sev_supported;
1187 sev_es = sev_es_supported;
1190 void sev_hardware_teardown(void)
1192 if (!svm_sev_enabled())
1195 bitmap_free(sev_asid_bitmap);
1196 bitmap_free(sev_reclaim_asid_bitmap);
1202 * Pages used by hardware to hold guest encrypted state must be flushed before
1203 * returning them to the system.
1205 static void sev_flush_guest_memory(struct vcpu_svm *svm, void *va,
1209 * If hardware enforced cache coherency for encrypted mappings of the
1210 * same physical page is supported, nothing to do.
1212 if (boot_cpu_has(X86_FEATURE_SME_COHERENT))
1216 * If the VM Page Flush MSR is supported, use it to flush the page
1217 * (using the page virtual address and the guest ASID).
1219 if (boot_cpu_has(X86_FEATURE_VM_PAGE_FLUSH)) {
1220 struct kvm_sev_info *sev;
1221 unsigned long va_start;
1224 /* Align start and stop to page boundaries. */
1225 va_start = (unsigned long)va;
1226 start = (u64)va_start & PAGE_MASK;
1227 stop = PAGE_ALIGN((u64)va_start + len);
1230 sev = &to_kvm_svm(svm->vcpu.kvm)->sev_info;
1232 while (start < stop) {
1233 wrmsrl(MSR_AMD64_VM_PAGE_FLUSH,
1242 WARN(1, "Address overflow, using WBINVD\n");
1246 * Hardware should always have one of the above features,
1247 * but if not, use WBINVD and issue a warning.
1249 WARN_ONCE(1, "Using WBINVD to flush guest memory\n");
1250 wbinvd_on_all_cpus();
1253 void sev_free_vcpu(struct kvm_vcpu *vcpu)
1255 struct vcpu_svm *svm;
1257 if (!sev_es_guest(vcpu->kvm))
1262 if (vcpu->arch.guest_state_protected)
1263 sev_flush_guest_memory(svm, svm->vmsa, PAGE_SIZE);
1264 __free_page(virt_to_page(svm->vmsa));
1266 if (svm->ghcb_sa_free)
1267 kfree(svm->ghcb_sa);
1270 static void dump_ghcb(struct vcpu_svm *svm)
1272 struct ghcb *ghcb = svm->ghcb;
1275 /* Re-use the dump_invalid_vmcb module parameter */
1276 if (!dump_invalid_vmcb) {
1277 pr_warn_ratelimited("set kvm_amd.dump_invalid_vmcb=1 to dump internal KVM state.\n");
1281 nbits = sizeof(ghcb->save.valid_bitmap) * 8;
1283 pr_err("GHCB (GPA=%016llx):\n", svm->vmcb->control.ghcb_gpa);
1284 pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_code",
1285 ghcb->save.sw_exit_code, ghcb_sw_exit_code_is_valid(ghcb));
1286 pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_info_1",
1287 ghcb->save.sw_exit_info_1, ghcb_sw_exit_info_1_is_valid(ghcb));
1288 pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_info_2",
1289 ghcb->save.sw_exit_info_2, ghcb_sw_exit_info_2_is_valid(ghcb));
1290 pr_err("%-20s%016llx is_valid: %u\n", "sw_scratch",
1291 ghcb->save.sw_scratch, ghcb_sw_scratch_is_valid(ghcb));
1292 pr_err("%-20s%*pb\n", "valid_bitmap", nbits, ghcb->save.valid_bitmap);
1295 static void sev_es_sync_to_ghcb(struct vcpu_svm *svm)
1297 struct kvm_vcpu *vcpu = &svm->vcpu;
1298 struct ghcb *ghcb = svm->ghcb;
1301 * The GHCB protocol so far allows for the following data
1303 * GPRs RAX, RBX, RCX, RDX
1305 * Copy their values to the GHCB if they are dirty.
1307 if (kvm_register_is_dirty(vcpu, VCPU_REGS_RAX))
1308 ghcb_set_rax(ghcb, vcpu->arch.regs[VCPU_REGS_RAX]);
1309 if (kvm_register_is_dirty(vcpu, VCPU_REGS_RBX))
1310 ghcb_set_rbx(ghcb, vcpu->arch.regs[VCPU_REGS_RBX]);
1311 if (kvm_register_is_dirty(vcpu, VCPU_REGS_RCX))
1312 ghcb_set_rcx(ghcb, vcpu->arch.regs[VCPU_REGS_RCX]);
1313 if (kvm_register_is_dirty(vcpu, VCPU_REGS_RDX))
1314 ghcb_set_rdx(ghcb, vcpu->arch.regs[VCPU_REGS_RDX]);
1317 static void sev_es_sync_from_ghcb(struct vcpu_svm *svm)
1319 struct vmcb_control_area *control = &svm->vmcb->control;
1320 struct kvm_vcpu *vcpu = &svm->vcpu;
1321 struct ghcb *ghcb = svm->ghcb;
1325 * The GHCB protocol so far allows for the following data
1327 * GPRs RAX, RBX, RCX, RDX
1331 * VMMCALL allows the guest to provide extra registers. KVM also
1332 * expects RSI for hypercalls, so include that, too.
1334 * Copy their values to the appropriate location if supplied.
1336 memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs));
1338 vcpu->arch.regs[VCPU_REGS_RAX] = ghcb_get_rax_if_valid(ghcb);
1339 vcpu->arch.regs[VCPU_REGS_RBX] = ghcb_get_rbx_if_valid(ghcb);
1340 vcpu->arch.regs[VCPU_REGS_RCX] = ghcb_get_rcx_if_valid(ghcb);
1341 vcpu->arch.regs[VCPU_REGS_RDX] = ghcb_get_rdx_if_valid(ghcb);
1342 vcpu->arch.regs[VCPU_REGS_RSI] = ghcb_get_rsi_if_valid(ghcb);
1344 svm->vmcb->save.cpl = ghcb_get_cpl_if_valid(ghcb);
1346 if (ghcb_xcr0_is_valid(ghcb)) {
1347 vcpu->arch.xcr0 = ghcb_get_xcr0(ghcb);
1348 kvm_update_cpuid_runtime(vcpu);
1351 /* Copy the GHCB exit information into the VMCB fields */
1352 exit_code = ghcb_get_sw_exit_code(ghcb);
1353 control->exit_code = lower_32_bits(exit_code);
1354 control->exit_code_hi = upper_32_bits(exit_code);
1355 control->exit_info_1 = ghcb_get_sw_exit_info_1(ghcb);
1356 control->exit_info_2 = ghcb_get_sw_exit_info_2(ghcb);
1358 /* Clear the valid entries fields */
1359 memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
1362 static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
1364 struct kvm_vcpu *vcpu;
1370 /* Only GHCB Usage code 0 is supported */
1371 if (ghcb->ghcb_usage)
1375 * Retrieve the exit code now even though is may not be marked valid
1376 * as it could help with debugging.
1378 exit_code = ghcb_get_sw_exit_code(ghcb);
1380 if (!ghcb_sw_exit_code_is_valid(ghcb) ||
1381 !ghcb_sw_exit_info_1_is_valid(ghcb) ||
1382 !ghcb_sw_exit_info_2_is_valid(ghcb))
1385 switch (ghcb_get_sw_exit_code(ghcb)) {
1386 case SVM_EXIT_READ_DR7:
1388 case SVM_EXIT_WRITE_DR7:
1389 if (!ghcb_rax_is_valid(ghcb))
1392 case SVM_EXIT_RDTSC:
1394 case SVM_EXIT_RDPMC:
1395 if (!ghcb_rcx_is_valid(ghcb))
1398 case SVM_EXIT_CPUID:
1399 if (!ghcb_rax_is_valid(ghcb) ||
1400 !ghcb_rcx_is_valid(ghcb))
1402 if (ghcb_get_rax(ghcb) == 0xd)
1403 if (!ghcb_xcr0_is_valid(ghcb))
1409 if (ghcb_get_sw_exit_info_1(ghcb) & SVM_IOIO_STR_MASK) {
1410 if (!ghcb_sw_scratch_is_valid(ghcb))
1413 if (!(ghcb_get_sw_exit_info_1(ghcb) & SVM_IOIO_TYPE_MASK))
1414 if (!ghcb_rax_is_valid(ghcb))
1419 if (!ghcb_rcx_is_valid(ghcb))
1421 if (ghcb_get_sw_exit_info_1(ghcb)) {
1422 if (!ghcb_rax_is_valid(ghcb) ||
1423 !ghcb_rdx_is_valid(ghcb))
1427 case SVM_EXIT_VMMCALL:
1428 if (!ghcb_rax_is_valid(ghcb) ||
1429 !ghcb_cpl_is_valid(ghcb))
1432 case SVM_EXIT_RDTSCP:
1434 case SVM_EXIT_WBINVD:
1436 case SVM_EXIT_MONITOR:
1437 if (!ghcb_rax_is_valid(ghcb) ||
1438 !ghcb_rcx_is_valid(ghcb) ||
1439 !ghcb_rdx_is_valid(ghcb))
1442 case SVM_EXIT_MWAIT:
1443 if (!ghcb_rax_is_valid(ghcb) ||
1444 !ghcb_rcx_is_valid(ghcb))
1447 case SVM_VMGEXIT_MMIO_READ:
1448 case SVM_VMGEXIT_MMIO_WRITE:
1449 if (!ghcb_sw_scratch_is_valid(ghcb))
1452 case SVM_VMGEXIT_UNSUPPORTED_EVENT:
1463 if (ghcb->ghcb_usage) {
1464 vcpu_unimpl(vcpu, "vmgexit: ghcb usage %#x is not valid\n",
1467 vcpu_unimpl(vcpu, "vmgexit: exit reason %#llx is not valid\n",
1472 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1473 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON;
1474 vcpu->run->internal.ndata = 2;
1475 vcpu->run->internal.data[0] = exit_code;
1476 vcpu->run->internal.data[1] = vcpu->arch.last_vmentry_cpu;
1481 static void pre_sev_es_run(struct vcpu_svm *svm)
1486 if (svm->ghcb_sa_free) {
1488 * The scratch area lives outside the GHCB, so there is a
1489 * buffer that, depending on the operation performed, may
1490 * need to be synced, then freed.
1492 if (svm->ghcb_sa_sync) {
1493 kvm_write_guest(svm->vcpu.kvm,
1494 ghcb_get_sw_scratch(svm->ghcb),
1495 svm->ghcb_sa, svm->ghcb_sa_len);
1496 svm->ghcb_sa_sync = false;
1499 kfree(svm->ghcb_sa);
1500 svm->ghcb_sa = NULL;
1501 svm->ghcb_sa_free = false;
1504 trace_kvm_vmgexit_exit(svm->vcpu.vcpu_id, svm->ghcb);
1506 sev_es_sync_to_ghcb(svm);
1508 kvm_vcpu_unmap(&svm->vcpu, &svm->ghcb_map, true);
1512 void pre_sev_run(struct vcpu_svm *svm, int cpu)
1514 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
1515 int asid = sev_get_asid(svm->vcpu.kvm);
1517 /* Perform any SEV-ES pre-run actions */
1518 pre_sev_es_run(svm);
1520 /* Assign the asid allocated with this SEV guest */
1526 * 1) when different VMCB for the same ASID is to be run on the same host CPU.
1527 * 2) or this VMCB was executed on different host CPU in previous VMRUNs.
1529 if (sd->sev_vmcbs[asid] == svm->vmcb &&
1530 svm->vcpu.arch.last_vmentry_cpu == cpu)
1533 sd->sev_vmcbs[asid] = svm->vmcb;
1534 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
1535 vmcb_mark_dirty(svm->vmcb, VMCB_ASID);
1538 #define GHCB_SCRATCH_AREA_LIMIT (16ULL * PAGE_SIZE)
1539 static bool setup_vmgexit_scratch(struct vcpu_svm *svm, bool sync, u64 len)
1541 struct vmcb_control_area *control = &svm->vmcb->control;
1542 struct ghcb *ghcb = svm->ghcb;
1543 u64 ghcb_scratch_beg, ghcb_scratch_end;
1544 u64 scratch_gpa_beg, scratch_gpa_end;
1547 scratch_gpa_beg = ghcb_get_sw_scratch(ghcb);
1548 if (!scratch_gpa_beg) {
1549 pr_err("vmgexit: scratch gpa not provided\n");
1553 scratch_gpa_end = scratch_gpa_beg + len;
1554 if (scratch_gpa_end < scratch_gpa_beg) {
1555 pr_err("vmgexit: scratch length (%#llx) not valid for scratch address (%#llx)\n",
1556 len, scratch_gpa_beg);
1560 if ((scratch_gpa_beg & PAGE_MASK) == control->ghcb_gpa) {
1561 /* Scratch area begins within GHCB */
1562 ghcb_scratch_beg = control->ghcb_gpa +
1563 offsetof(struct ghcb, shared_buffer);
1564 ghcb_scratch_end = control->ghcb_gpa +
1565 offsetof(struct ghcb, reserved_1);
1568 * If the scratch area begins within the GHCB, it must be
1569 * completely contained in the GHCB shared buffer area.
1571 if (scratch_gpa_beg < ghcb_scratch_beg ||
1572 scratch_gpa_end > ghcb_scratch_end) {
1573 pr_err("vmgexit: scratch area is outside of GHCB shared buffer area (%#llx - %#llx)\n",
1574 scratch_gpa_beg, scratch_gpa_end);
1578 scratch_va = (void *)svm->ghcb;
1579 scratch_va += (scratch_gpa_beg - control->ghcb_gpa);
1582 * The guest memory must be read into a kernel buffer, so
1585 if (len > GHCB_SCRATCH_AREA_LIMIT) {
1586 pr_err("vmgexit: scratch area exceeds KVM limits (%#llx requested, %#llx limit)\n",
1587 len, GHCB_SCRATCH_AREA_LIMIT);
1590 scratch_va = kzalloc(len, GFP_KERNEL);
1594 if (kvm_read_guest(svm->vcpu.kvm, scratch_gpa_beg, scratch_va, len)) {
1595 /* Unable to copy scratch area from guest */
1596 pr_err("vmgexit: kvm_read_guest for scratch area failed\n");
1603 * The scratch area is outside the GHCB. The operation will
1604 * dictate whether the buffer needs to be synced before running
1605 * the vCPU next time (i.e. a read was requested so the data
1606 * must be written back to the guest memory).
1608 svm->ghcb_sa_sync = sync;
1609 svm->ghcb_sa_free = true;
1612 svm->ghcb_sa = scratch_va;
1613 svm->ghcb_sa_len = len;
1618 static void set_ghcb_msr_bits(struct vcpu_svm *svm, u64 value, u64 mask,
1621 svm->vmcb->control.ghcb_gpa &= ~(mask << pos);
1622 svm->vmcb->control.ghcb_gpa |= (value & mask) << pos;
1625 static u64 get_ghcb_msr_bits(struct vcpu_svm *svm, u64 mask, unsigned int pos)
1627 return (svm->vmcb->control.ghcb_gpa >> pos) & mask;
1630 static void set_ghcb_msr(struct vcpu_svm *svm, u64 value)
1632 svm->vmcb->control.ghcb_gpa = value;
1635 static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
1637 struct vmcb_control_area *control = &svm->vmcb->control;
1638 struct kvm_vcpu *vcpu = &svm->vcpu;
1642 ghcb_info = control->ghcb_gpa & GHCB_MSR_INFO_MASK;
1644 trace_kvm_vmgexit_msr_protocol_enter(svm->vcpu.vcpu_id,
1647 switch (ghcb_info) {
1648 case GHCB_MSR_SEV_INFO_REQ:
1649 set_ghcb_msr(svm, GHCB_MSR_SEV_INFO(GHCB_VERSION_MAX,
1653 case GHCB_MSR_CPUID_REQ: {
1654 u64 cpuid_fn, cpuid_reg, cpuid_value;
1656 cpuid_fn = get_ghcb_msr_bits(svm,
1657 GHCB_MSR_CPUID_FUNC_MASK,
1658 GHCB_MSR_CPUID_FUNC_POS);
1660 /* Initialize the registers needed by the CPUID intercept */
1661 vcpu->arch.regs[VCPU_REGS_RAX] = cpuid_fn;
1662 vcpu->arch.regs[VCPU_REGS_RCX] = 0;
1664 ret = svm_invoke_exit_handler(svm, SVM_EXIT_CPUID);
1670 cpuid_reg = get_ghcb_msr_bits(svm,
1671 GHCB_MSR_CPUID_REG_MASK,
1672 GHCB_MSR_CPUID_REG_POS);
1674 cpuid_value = vcpu->arch.regs[VCPU_REGS_RAX];
1675 else if (cpuid_reg == 1)
1676 cpuid_value = vcpu->arch.regs[VCPU_REGS_RBX];
1677 else if (cpuid_reg == 2)
1678 cpuid_value = vcpu->arch.regs[VCPU_REGS_RCX];
1680 cpuid_value = vcpu->arch.regs[VCPU_REGS_RDX];
1682 set_ghcb_msr_bits(svm, cpuid_value,
1683 GHCB_MSR_CPUID_VALUE_MASK,
1684 GHCB_MSR_CPUID_VALUE_POS);
1686 set_ghcb_msr_bits(svm, GHCB_MSR_CPUID_RESP,
1691 case GHCB_MSR_TERM_REQ: {
1692 u64 reason_set, reason_code;
1694 reason_set = get_ghcb_msr_bits(svm,
1695 GHCB_MSR_TERM_REASON_SET_MASK,
1696 GHCB_MSR_TERM_REASON_SET_POS);
1697 reason_code = get_ghcb_msr_bits(svm,
1698 GHCB_MSR_TERM_REASON_MASK,
1699 GHCB_MSR_TERM_REASON_POS);
1700 pr_info("SEV-ES guest requested termination: %#llx:%#llx\n",
1701 reason_set, reason_code);
1708 trace_kvm_vmgexit_msr_protocol_exit(svm->vcpu.vcpu_id,
1709 control->ghcb_gpa, ret);
1714 int sev_handle_vmgexit(struct vcpu_svm *svm)
1716 struct vmcb_control_area *control = &svm->vmcb->control;
1717 u64 ghcb_gpa, exit_code;
1721 /* Validate the GHCB */
1722 ghcb_gpa = control->ghcb_gpa;
1723 if (ghcb_gpa & GHCB_MSR_INFO_MASK)
1724 return sev_handle_vmgexit_msr_protocol(svm);
1727 vcpu_unimpl(&svm->vcpu, "vmgexit: GHCB gpa is not set\n");
1731 if (kvm_vcpu_map(&svm->vcpu, ghcb_gpa >> PAGE_SHIFT, &svm->ghcb_map)) {
1732 /* Unable to map GHCB from guest */
1733 vcpu_unimpl(&svm->vcpu, "vmgexit: error mapping GHCB [%#llx] from guest\n",
1738 svm->ghcb = svm->ghcb_map.hva;
1739 ghcb = svm->ghcb_map.hva;
1741 trace_kvm_vmgexit_enter(svm->vcpu.vcpu_id, ghcb);
1743 exit_code = ghcb_get_sw_exit_code(ghcb);
1745 ret = sev_es_validate_vmgexit(svm);
1749 sev_es_sync_from_ghcb(svm);
1750 ghcb_set_sw_exit_info_1(ghcb, 0);
1751 ghcb_set_sw_exit_info_2(ghcb, 0);
1754 switch (exit_code) {
1755 case SVM_VMGEXIT_MMIO_READ:
1756 if (!setup_vmgexit_scratch(svm, true, control->exit_info_2))
1759 ret = kvm_sev_es_mmio_read(&svm->vcpu,
1760 control->exit_info_1,
1761 control->exit_info_2,
1764 case SVM_VMGEXIT_MMIO_WRITE:
1765 if (!setup_vmgexit_scratch(svm, false, control->exit_info_2))
1768 ret = kvm_sev_es_mmio_write(&svm->vcpu,
1769 control->exit_info_1,
1770 control->exit_info_2,
1773 case SVM_VMGEXIT_UNSUPPORTED_EVENT:
1774 vcpu_unimpl(&svm->vcpu,
1775 "vmgexit: unsupported event - exit_info_1=%#llx, exit_info_2=%#llx\n",
1776 control->exit_info_1, control->exit_info_2);
1779 ret = svm_invoke_exit_handler(svm, exit_code);
1785 int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in)
1787 if (!setup_vmgexit_scratch(svm, in, svm->vmcb->control.exit_info_2))
1790 return kvm_sev_es_string_io(&svm->vcpu, size, port,
1791 svm->ghcb_sa, svm->ghcb_sa_len, in);