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[PATCH 3/4] xen/xsm: Use __init_data_cf_clobber for xsm_ops
- To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 26 Nov 2021 21:22:57 +0000
- Authentication-results: esa5.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>, Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, "Jan Beulich" <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Fri, 26 Nov 2021 21:23:33 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
All calls through xsm_ops are fully altcall'd. Harden all fnptr targets.
This yields:
(XEN) altcall: Optimised away 197 endbr64 instructions
of 1655 on an everything-enabled build of Xen, which is ~12%.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
CC: Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
---
xen/xsm/dummy.c | 2 +-
xen/xsm/flask/hooks.c | 2 +-
xen/xsm/silo.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c
index 4d29a9aa5b9f..4f1d352d5507 100644
--- a/xen/xsm/dummy.c
+++ b/xen/xsm/dummy.c
@@ -13,7 +13,7 @@
#define XSM_NO_WRAPPERS
#include <xsm/dummy.h>
-static const struct xsm_ops __initconstrel dummy_ops = {
+static struct xsm_ops __initdata_cf_clobber dummy_ops = {
.security_domaininfo = xsm_security_domaininfo,
.domain_create = xsm_domain_create,
.getdomaininfo = xsm_getdomaininfo,
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index 63484e323c09..b1c917113ec3 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1765,7 +1765,7 @@ static int cf_check flask_argo_send(
#endif
-static const struct xsm_ops __initconstrel flask_ops = {
+static struct xsm_ops __initdata_cf_clobber flask_ops = {
.security_domaininfo = flask_security_domaininfo,
.domain_create = flask_domain_create,
.getdomaininfo = flask_getdomaininfo,
diff --git a/xen/xsm/silo.c b/xen/xsm/silo.c
index 4d5fc98e7e54..7a17595888bb 100644
--- a/xen/xsm/silo.c
+++ b/xen/xsm/silo.c
@@ -102,7 +102,7 @@ static int cf_check silo_argo_send(
#endif
-static const struct xsm_ops __initconstrel silo_xsm_ops = {
+static struct xsm_ops __initdata_cf_clobber silo_xsm_ops = {
.evtchn_unbound = silo_evtchn_unbound,
.evtchn_interdomain = silo_evtchn_interdomain,
.grant_mapref = silo_grant_mapref,
--
2.11.0
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