'struct meson_secure_pwrc_domain_desc' is not modified in this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security.
On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
4909 4072 0 8981 2315 drivers/pmdomain/amlogic/meson-secure-pwrc.o
After:
=====
text data bss dec hex filename
8605 392 0 8997 2325 drivers/pmdomain/amlogic/meson-secure-pwrc.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
Compile tested-only.
The .is_off() function is *always* set as pwrc_secure_is_off(), so it could
make sense to remove this function pointer and call pwrc_secure_is_off()
directly when needed.
This would save some memory and useless indirection.
I leave it as-is because it is maybe here for future use.
---
drivers/pmdomain/amlogic/meson-secure-pwrc.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/pmdomain/amlogic/meson-secure-pwrc.c b/drivers/pmdomain/amlogic/meson-secure-pwrc.c
index df5567418226..62857482f874 100644
--- a/drivers/pmdomain/amlogic/meson-secure-pwrc.c
+++ b/drivers/pmdomain/amlogic/meson-secure-pwrc.c
@@ -46,7 +46,7 @@ struct meson_secure_pwrc_domain_desc {
struct meson_secure_pwrc_domain_data {
unsigned int count;
- struct meson_secure_pwrc_domain_desc *domains;
+ const struct meson_secure_pwrc_domain_desc *domains;
};
static bool pwrc_secure_is_off(struct meson_secure_pwrc_domain *pwrc_domain)
@@ -110,7 +110,7 @@ static int meson_secure_pwrc_on(struct generic_pm_domain *domain)
.parent = __parent, \
}
-static struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
+static const struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
SEC_PD(DSPA, 0),
SEC_PD(DSPB, 0),
/* UART should keep working in ATF after suspend and before resume */
@@ -137,7 +137,7 @@ static struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
SEC_PD(RSA, 0),
};
-static struct meson_secure_pwrc_domain_desc a4_pwrc_domains[] = {
+static const struct meson_secure_pwrc_domain_desc a4_pwrc_domains[] = {
SEC_PD(A4_AUDIO, 0),
SEC_PD(A4_SDIOA, 0),
SEC_PD(A4_EMMC, 0),
@@ -155,7 +155,7 @@ static struct meson_secure_pwrc_domain_desc a4_pwrc_domains[] = {
SEC_PD(A4_AO_IR, GENPD_FLAG_ALWAYS_ON),
};
-static struct meson_secure_pwrc_domain_desc c3_pwrc_domains[] = {
+static const struct meson_secure_pwrc_domain_desc c3_pwrc_domains[] = {
SEC_PD(C3_NNA, 0),
SEC_PD(C3_AUDIO, 0),
SEC_PD(C3_SDIOA, 0),
@@ -172,7 +172,7 @@ static struct meson_secure_pwrc_domain_desc c3_pwrc_domains[] = {
SEC_PD(C3_VCODEC, 0),
};
-static struct meson_secure_pwrc_domain_desc s4_pwrc_domains[] = {
+static const struct meson_secure_pwrc_domain_desc s4_pwrc_domains[] = {
SEC_PD(S4_DOS_HEVC, 0),
SEC_PD(S4_DOS_VDEC, 0),
SEC_PD(S4_VPU_HDMI, 0),
@@ -184,7 +184,7 @@ static struct meson_secure_pwrc_domain_desc s4_pwrc_domains[] = {
SEC_PD(S4_AUDIO, 0),
};
-static struct meson_secure_pwrc_domain_desc t7_pwrc_domains[] = {
+static const struct meson_secure_pwrc_domain_desc t7_pwrc_domains[] = {
SEC_PD(T7_DSPA, 0),
SEC_PD(T7_DSPB, 0),
TOP_PD(T7_DOS_HCODEC, 0, PWRC_T7_NIC3_ID),
