| Message ID | 20220907145240.1683088-10-sudeep.holla@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | firmware: arm_ffa: Refactoring and initial/minor v1.1 update | expand |
On Wed, Sep 7, 2022 at 4:53 PM Sudeep Holla <sudeep.holla@arm.com> wrote: > > FF-A v1.1 adds a flag in the partition properties to indicate if the > partition runs in the AArch32 or AArch64 execution state. Use the same > to set-up the 32-bit execution flag mode in the ffa_dev automatically > and ignore any requests to do the same from the ffa_driver. > > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > --- > drivers/firmware/arm_ffa/driver.c | 13 ++++++++++++- > include/linux/arm_ffa.h | 2 ++ > 2 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c > index 42bc22220c69..34e12a2a98fe 100644 > --- a/drivers/firmware/arm_ffa/driver.c > +++ b/drivers/firmware/arm_ffa/driver.c > @@ -648,11 +648,19 @@ static int ffa_partition_info_get(const char *uuid_str, > return 0; > } > > -static void ffa_mode_32bit_set(struct ffa_device *dev) > +static void _ffa_mode_32bit_set(struct ffa_device *dev) > { > dev->mode_32bit = true; > } > > +static void ffa_mode_32bit_set(struct ffa_device *dev) > +{ > + if (drv_info->version > FFA_VERSION_1_0) > + return; > + > + _ffa_mode_32bit_set(dev); > +} > + > static int ffa_sync_send_receive(struct ffa_device *dev, > struct ffa_send_direct_data *data) > { > @@ -744,6 +752,9 @@ static void ffa_setup_partitions(void) > __func__, tpbuf->id); > continue; > } > + > + if (!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC)) > + _ffa_mode_32bit_set(ffa_dev); For FF-A 1.0 it looks like we change the dev->mode_32bit default value from false to true. Or am I missing something? Cheers, Jens > } > kfree(pbuf); > } > diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h > index 09567ffd1f49..5964b6104996 100644 > --- a/include/linux/arm_ffa.h > +++ b/include/linux/arm_ffa.h > @@ -106,6 +106,8 @@ struct ffa_partition_info { > #define FFA_PARTITION_DIRECT_SEND BIT(1) > /* partition can send and receive indirect messages. */ > #define FFA_PARTITION_INDIRECT_MSG BIT(2) > +/* partition runs in the AArch64 execution state. */ > +#define FFA_PARTITION_AARCH64_EXEC BIT(8) > u32 properties; > u32 uuid[4]; > }; > -- > 2.37.3 >
On Thu, Sep 08, 2022 at 12:08:00PM +0200, Jens Wiklander wrote: > On Wed, Sep 7, 2022 at 4:53 PM Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > FF-A v1.1 adds a flag in the partition properties to indicate if the > > partition runs in the AArch32 or AArch64 execution state. Use the same > > to set-up the 32-bit execution flag mode in the ffa_dev automatically > > and ignore any requests to do the same from the ffa_driver. > > > > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > > --- > > drivers/firmware/arm_ffa/driver.c | 13 ++++++++++++- > > include/linux/arm_ffa.h | 2 ++ > > 2 files changed, 14 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c > > index 42bc22220c69..34e12a2a98fe 100644 > > --- a/drivers/firmware/arm_ffa/driver.c > > +++ b/drivers/firmware/arm_ffa/driver.c > > @@ -648,11 +648,19 @@ static int ffa_partition_info_get(const char *uuid_str, > > return 0; > > } > > > > -static void ffa_mode_32bit_set(struct ffa_device *dev) > > +static void _ffa_mode_32bit_set(struct ffa_device *dev) > > { > > dev->mode_32bit = true; > > } > > > > +static void ffa_mode_32bit_set(struct ffa_device *dev) > > +{ > > + if (drv_info->version > FFA_VERSION_1_0) > > + return; > > + > > + _ffa_mode_32bit_set(dev); > > +} > > + > > static int ffa_sync_send_receive(struct ffa_device *dev, > > struct ffa_send_direct_data *data) > > { > > @@ -744,6 +752,9 @@ static void ffa_setup_partitions(void) > > __func__, tpbuf->id); > > continue; > > } > > + > > + if (!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC)) > > + _ffa_mode_32bit_set(ffa_dev); > > For FF-A 1.0 it looks like we change the dev->mode_32bit default value > from false to true. Or am I missing something? > You are right, was trying to avoid additional check on version but we need that to keep the behaviour unchanged. I will add the check. Thanks again for spotting this.
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 42bc22220c69..34e12a2a98fe 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -648,11 +648,19 @@ static int ffa_partition_info_get(const char *uuid_str, return 0; } -static void ffa_mode_32bit_set(struct ffa_device *dev) +static void _ffa_mode_32bit_set(struct ffa_device *dev) { dev->mode_32bit = true; } +static void ffa_mode_32bit_set(struct ffa_device *dev) +{ + if (drv_info->version > FFA_VERSION_1_0) + return; + + _ffa_mode_32bit_set(dev); +} + static int ffa_sync_send_receive(struct ffa_device *dev, struct ffa_send_direct_data *data) { @@ -744,6 +752,9 @@ static void ffa_setup_partitions(void) __func__, tpbuf->id); continue; } + + if (!(tpbuf->properties & FFA_PARTITION_AARCH64_EXEC)) + _ffa_mode_32bit_set(ffa_dev); } kfree(pbuf); } diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 09567ffd1f49..5964b6104996 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -106,6 +106,8 @@ struct ffa_partition_info { #define FFA_PARTITION_DIRECT_SEND BIT(1) /* partition can send and receive indirect messages. */ #define FFA_PARTITION_INDIRECT_MSG BIT(2) +/* partition runs in the AArch64 execution state. */ +#define FFA_PARTITION_AARCH64_EXEC BIT(8) u32 properties; u32 uuid[4]; };
FF-A v1.1 adds a flag in the partition properties to indicate if the partition runs in the AArch32 or AArch64 execution state. Use the same to set-up the 32-bit execution flag mode in the ffa_dev automatically and ignore any requests to do the same from the ffa_driver. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/firmware/arm_ffa/driver.c | 13 ++++++++++++- include/linux/arm_ffa.h | 2 ++ 2 files changed, 14 insertions(+), 1 deletion(-)