Commit 0ddfb1cf authored by Tom Lendacky's avatar Tom Lendacky Committed by Borislav Petkov

x86/sev-es: Use GHCB accessor for setting the MMIO scratch buffer

Use ghcb_set_sw_scratch() to set the GHCB scratch field, which will also
set the corresponding bit in the GHCB valid_bitmap field to denote that
sw_scratch is actually valid.
Signed-off-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarJoerg Roedel <jroedel@suse.de>
Link: https://lkml.kernel.org/r/ba84deabdf44a7a880454fb351d189c6ad79d4ba.1601041106.git.thomas.lendacky@amd.com
parent f5ed7775
......@@ -751,7 +751,7 @@ static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
/* Can never be greater than 8 */
exit_info_2 = bytes;
ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer);
ghcb_set_sw_scratch(ghcb, ghcb_pa + offsetof(struct ghcb, shared_buffer));
return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2);
}
......
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