For AMD SEV use correct command mask in ccp(4) driver.

According to AMD SEV API specification, the mask for command ID is
supposed to be of length 10 (Bits [25:16]), rather than length 6.
This ensures that all commands are properly processed by the PSP.

from Aaron Debebe; OK hshoexer@

diff --git a/sys/dev/ic/ccp.c b/sys/dev/ic/ccp.c
index 79650a6..5981ae4 100644 (file)
--- a/sys/dev/ic/ccp.c
+++ b/sys/dev/ic/ccp.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ccp.c,v 1.5 2024/06/13 17:59:08 bluhm Exp $ */
+/*     $OpenBSD: ccp.c,v 1.6 2024/08/13 20:48:00 bluhm Exp $ */
 
 /*
  * Copyright (c) 2018 David Gwynne <dlg@openbsd.org>
@@ -228,7 +228,7 @@ ccp_docmd(struct ccp_softc *sc, int cmd, uint64_t paddr)
 
        plo = ((paddr >> 0) & 0xffffffff);
        phi = ((paddr >> 32) & 0xffffffff);
-       cmdword = (cmd & 0x3f) << 16;
+       cmdword = (cmd & 0x3ff) << 16;
        if (!cold)
                cmdword |= PSP_CMDRESP_IOC;