| Message ID | a6c9b1bcdf259adabbcaf91183d3f5ab87a98600.1719644292.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | ACPI: PMIC: Constify struct pmic_table | expand |
Hi, On 6/29/24 8:58 AM, Christophe JAILLET wrote: > 'struct pmic_table' is not modified in these drivers. > > 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 > 3811 786 0 4597 11f5 drivers/acpi/pmic/intel_pmic_xpower.o > > text data bss dec hex filename > 4147 450 0 4597 11f5 drivers/acpi/pmic/intel_pmic_xpower.o > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > --- > Compile tested-only Thanks, patch looks good to me: Reviewed-by: Hans de Goede <hdegoede@redhat.com> Regards, Hans > --- > drivers/acpi/pmic/intel_pmic.c | 2 +- > drivers/acpi/pmic/intel_pmic.h | 4 ++-- > drivers/acpi/pmic/intel_pmic_bxtwc.c | 4 ++-- > drivers/acpi/pmic/intel_pmic_bytcrc.c | 4 ++-- > drivers/acpi/pmic/intel_pmic_chtdc_ti.c | 4 ++-- > drivers/acpi/pmic/intel_pmic_chtwc.c | 2 +- > drivers/acpi/pmic/intel_pmic_xpower.c | 4 ++-- > 7 files changed, 12 insertions(+), 12 deletions(-) > > diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c > index f20dbda1a831..134e9ca8eaa2 100644 > --- a/drivers/acpi/pmic/intel_pmic.c > +++ b/drivers/acpi/pmic/intel_pmic.c > @@ -31,7 +31,7 @@ struct intel_pmic_opregion { > > static struct intel_pmic_opregion *intel_pmic_opregion; > > -static int pmic_get_reg_bit(int address, struct pmic_table *table, > +static int pmic_get_reg_bit(int address, const struct pmic_table *table, > int count, int *reg, int *bit) > { > int i; > diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h > index d956b03a6ca0..006f0780ffab 100644 > --- a/drivers/acpi/pmic/intel_pmic.h > +++ b/drivers/acpi/pmic/intel_pmic.h > @@ -21,9 +21,9 @@ struct intel_pmic_opregion_data { > u32 reg_address, u32 value, u32 mask); > int (*lpat_raw_to_temp)(struct acpi_lpat_conversion_table *lpat_table, > int raw); > - struct pmic_table *power_table; > + const struct pmic_table *power_table; > int power_table_count; > - struct pmic_table *thermal_table; > + const struct pmic_table *thermal_table; > int thermal_table_count; > /* For generic exec_mipi_pmic_seq_element handling */ > int pmic_i2c_address; > diff --git a/drivers/acpi/pmic/intel_pmic_bxtwc.c b/drivers/acpi/pmic/intel_pmic_bxtwc.c > index e247615189fa..c332afbf82bd 100644 > --- a/drivers/acpi/pmic/intel_pmic_bxtwc.c > +++ b/drivers/acpi/pmic/intel_pmic_bxtwc.c > @@ -24,7 +24,7 @@ > #define VSWITCH1_OUTPUT BIT(4) > #define VUSBPHY_CHARGE BIT(1) > > -static struct pmic_table power_table[] = { > +static const struct pmic_table power_table[] = { > { > .address = 0x0, > .reg = 0x63, > @@ -177,7 +177,7 @@ static struct pmic_table power_table[] = { > } /* MOFF -> MODEMCTRL Bit 0 */ > }; > > -static struct pmic_table thermal_table[] = { > +static const struct pmic_table thermal_table[] = { > { > .address = 0x00, > .reg = 0x4F39 > diff --git a/drivers/acpi/pmic/intel_pmic_bytcrc.c b/drivers/acpi/pmic/intel_pmic_bytcrc.c > index 2b09f8da5400..b4c21a75294a 100644 > --- a/drivers/acpi/pmic/intel_pmic_bytcrc.c > +++ b/drivers/acpi/pmic/intel_pmic_bytcrc.c > @@ -16,7 +16,7 @@ > > #define PMIC_A0LOCK_REG 0xc5 > > -static struct pmic_table power_table[] = { > +static const struct pmic_table power_table[] = { > /* { > .address = 0x00, > .reg = ??, > @@ -134,7 +134,7 @@ static struct pmic_table power_table[] = { > }, /* V105 -> V1P05S, L2 SRAM */ > }; > > -static struct pmic_table thermal_table[] = { > +static const struct pmic_table thermal_table[] = { > { > .address = 0x00, > .reg = 0x75 > diff --git a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c > index 79f9df552524..ecb36fbc1e7f 100644 > --- a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c > +++ b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c > @@ -23,7 +23,7 @@ > #define CHTDC_TI_BPTHERM 0x58 > #define CHTDC_TI_GPADC 0x5a > > -static struct pmic_table chtdc_ti_power_table[] = { > +static const struct pmic_table chtdc_ti_power_table[] = { > { .address = 0x00, .reg = 0x41 }, /* LDO1 */ > { .address = 0x04, .reg = 0x42 }, /* LDO2 */ > { .address = 0x08, .reg = 0x43 }, /* LDO3 */ > @@ -39,7 +39,7 @@ static struct pmic_table chtdc_ti_power_table[] = { > { .address = 0x30, .reg = 0x4e }, /* LD14 */ > }; > > -static struct pmic_table chtdc_ti_thermal_table[] = { > +static const struct pmic_table chtdc_ti_thermal_table[] = { > { > .address = 0x00, > .reg = CHTDC_TI_GPADC > diff --git a/drivers/acpi/pmic/intel_pmic_chtwc.c b/drivers/acpi/pmic/intel_pmic_chtwc.c > index 25aa3e33b09a..81caede51ca2 100644 > --- a/drivers/acpi/pmic/intel_pmic_chtwc.c > +++ b/drivers/acpi/pmic/intel_pmic_chtwc.c > @@ -70,7 +70,7 @@ > * "regulator: whiskey_cove: implements Whiskey Cove pmic VRF support" > * https://github.com/intel-aero/meta-intel-aero/blob/master/recipes-kernel/linux/linux-yocto/0019-regulator-whiskey_cove-implements-WhiskeyCove-pmic-V.patch > */ > -static struct pmic_table power_table[] = { > +static const struct pmic_table power_table[] = { > { > .address = 0x0, > .reg = CHT_WC_V1P8A_CTRL, > diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c > index 43c5850b4bf3..49bda5e0c8aa 100644 > --- a/drivers/acpi/pmic/intel_pmic_xpower.c > +++ b/drivers/acpi/pmic/intel_pmic_xpower.c > @@ -26,7 +26,7 @@ > #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0) > #define AXP288_ADC_TS_CURRENT_ON (3 << 0) > > -static struct pmic_table power_table[] = { > +static const struct pmic_table power_table[] = { > { > .address = 0x00, > .reg = 0x13, > @@ -129,7 +129,7 @@ static struct pmic_table power_table[] = { > }; > > /* TMP0 - TMP5 are the same, all from GPADC */ > -static struct pmic_table thermal_table[] = { > +static const struct pmic_table thermal_table[] = { > { > .address = 0x00, > .reg = XPOWER_GPADC_LOW
diff --git a/drivers/acpi/pmic/intel_pmic.c b/drivers/acpi/pmic/intel_pmic.c index f20dbda1a831..134e9ca8eaa2 100644 --- a/drivers/acpi/pmic/intel_pmic.c +++ b/drivers/acpi/pmic/intel_pmic.c @@ -31,7 +31,7 @@ struct intel_pmic_opregion { static struct intel_pmic_opregion *intel_pmic_opregion; -static int pmic_get_reg_bit(int address, struct pmic_table *table, +static int pmic_get_reg_bit(int address, const struct pmic_table *table, int count, int *reg, int *bit) { int i; diff --git a/drivers/acpi/pmic/intel_pmic.h b/drivers/acpi/pmic/intel_pmic.h index d956b03a6ca0..006f0780ffab 100644 --- a/drivers/acpi/pmic/intel_pmic.h +++ b/drivers/acpi/pmic/intel_pmic.h @@ -21,9 +21,9 @@ struct intel_pmic_opregion_data { u32 reg_address, u32 value, u32 mask); int (*lpat_raw_to_temp)(struct acpi_lpat_conversion_table *lpat_table, int raw); - struct pmic_table *power_table; + const struct pmic_table *power_table; int power_table_count; - struct pmic_table *thermal_table; + const struct pmic_table *thermal_table; int thermal_table_count; /* For generic exec_mipi_pmic_seq_element handling */ int pmic_i2c_address; diff --git a/drivers/acpi/pmic/intel_pmic_bxtwc.c b/drivers/acpi/pmic/intel_pmic_bxtwc.c index e247615189fa..c332afbf82bd 100644 --- a/drivers/acpi/pmic/intel_pmic_bxtwc.c +++ b/drivers/acpi/pmic/intel_pmic_bxtwc.c @@ -24,7 +24,7 @@ #define VSWITCH1_OUTPUT BIT(4) #define VUSBPHY_CHARGE BIT(1) -static struct pmic_table power_table[] = { +static const struct pmic_table power_table[] = { { .address = 0x0, .reg = 0x63, @@ -177,7 +177,7 @@ static struct pmic_table power_table[] = { } /* MOFF -> MODEMCTRL Bit 0 */ }; -static struct pmic_table thermal_table[] = { +static const struct pmic_table thermal_table[] = { { .address = 0x00, .reg = 0x4F39 diff --git a/drivers/acpi/pmic/intel_pmic_bytcrc.c b/drivers/acpi/pmic/intel_pmic_bytcrc.c index 2b09f8da5400..b4c21a75294a 100644 --- a/drivers/acpi/pmic/intel_pmic_bytcrc.c +++ b/drivers/acpi/pmic/intel_pmic_bytcrc.c @@ -16,7 +16,7 @@ #define PMIC_A0LOCK_REG 0xc5 -static struct pmic_table power_table[] = { +static const struct pmic_table power_table[] = { /* { .address = 0x00, .reg = ??, @@ -134,7 +134,7 @@ static struct pmic_table power_table[] = { }, /* V105 -> V1P05S, L2 SRAM */ }; -static struct pmic_table thermal_table[] = { +static const struct pmic_table thermal_table[] = { { .address = 0x00, .reg = 0x75 diff --git a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c index 79f9df552524..ecb36fbc1e7f 100644 --- a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c +++ b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c @@ -23,7 +23,7 @@ #define CHTDC_TI_BPTHERM 0x58 #define CHTDC_TI_GPADC 0x5a -static struct pmic_table chtdc_ti_power_table[] = { +static const struct pmic_table chtdc_ti_power_table[] = { { .address = 0x00, .reg = 0x41 }, /* LDO1 */ { .address = 0x04, .reg = 0x42 }, /* LDO2 */ { .address = 0x08, .reg = 0x43 }, /* LDO3 */ @@ -39,7 +39,7 @@ static struct pmic_table chtdc_ti_power_table[] = { { .address = 0x30, .reg = 0x4e }, /* LD14 */ }; -static struct pmic_table chtdc_ti_thermal_table[] = { +static const struct pmic_table chtdc_ti_thermal_table[] = { { .address = 0x00, .reg = CHTDC_TI_GPADC diff --git a/drivers/acpi/pmic/intel_pmic_chtwc.c b/drivers/acpi/pmic/intel_pmic_chtwc.c index 25aa3e33b09a..81caede51ca2 100644 --- a/drivers/acpi/pmic/intel_pmic_chtwc.c +++ b/drivers/acpi/pmic/intel_pmic_chtwc.c @@ -70,7 +70,7 @@ * "regulator: whiskey_cove: implements Whiskey Cove pmic VRF support" * https://github.com/intel-aero/meta-intel-aero/blob/master/recipes-kernel/linux/linux-yocto/0019-regulator-whiskey_cove-implements-WhiskeyCove-pmic-V.patch */ -static struct pmic_table power_table[] = { +static const struct pmic_table power_table[] = { { .address = 0x0, .reg = CHT_WC_V1P8A_CTRL, diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c index 43c5850b4bf3..49bda5e0c8aa 100644 --- a/drivers/acpi/pmic/intel_pmic_xpower.c +++ b/drivers/acpi/pmic/intel_pmic_xpower.c @@ -26,7 +26,7 @@ #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0) #define AXP288_ADC_TS_CURRENT_ON (3 << 0) -static struct pmic_table power_table[] = { +static const struct pmic_table power_table[] = { { .address = 0x00, .reg = 0x13, @@ -129,7 +129,7 @@ static struct pmic_table power_table[] = { }; /* TMP0 - TMP5 are the same, all from GPADC */ -static struct pmic_table thermal_table[] = { +static const struct pmic_table thermal_table[] = { { .address = 0x00, .reg = XPOWER_GPADC_LOW
'struct pmic_table' is not modified in these drivers. 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 3811 786 0 4597 11f5 drivers/acpi/pmic/intel_pmic_xpower.o text data bss dec hex filename 4147 450 0 4597 11f5 drivers/acpi/pmic/intel_pmic_xpower.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- Compile tested-only --- drivers/acpi/pmic/intel_pmic.c | 2 +- drivers/acpi/pmic/intel_pmic.h | 4 ++-- drivers/acpi/pmic/intel_pmic_bxtwc.c | 4 ++-- drivers/acpi/pmic/intel_pmic_bytcrc.c | 4 ++-- drivers/acpi/pmic/intel_pmic_chtdc_ti.c | 4 ++-- drivers/acpi/pmic/intel_pmic_chtwc.c | 2 +- drivers/acpi/pmic/intel_pmic_xpower.c | 4 ++-- 7 files changed, 12 insertions(+), 12 deletions(-)