On Tue, Jun 14, 2022 at 12:12:58PM -0400, Stefan Berger wrote: > Simplify tpm_read_log_of() and call of_tpm_get_sml_parameters() to get > the base and size of the TPM log. > > Signed-off-by: Stefan Berger <[email protected]> > Cc: Jarkko Sakkinen <[email protected]> > Cc: Jason Gunthorpe <[email protected]> > --- > drivers/char/tpm/eventlog/of.c | 31 +++++-------------------------- > 1 file changed, 5 insertions(+), 26 deletions(-) > > diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c > index a9ce66d09a75..e272c7a0765f 100644 > --- a/drivers/char/tpm/eventlog/of.c > +++ b/drivers/char/tpm/eventlog/of.c > @@ -12,6 +12,7 @@ > > #include <linux/slab.h> > #include <linux/of.h> > +#include <linux/of_device.h> > #include <linux/tpm_eventlog.h> > > #include "../tpm.h" > @@ -20,11 +21,10 @@ > int tpm_read_log_of(struct tpm_chip *chip) > { > struct device_node *np; > - const u32 *sizep; > - const u64 *basep; > struct tpm_bios_log *log; > u32 size; > u64 base; > + int ret; > > log = &chip->log; > if (chip->dev.parent && chip->dev.parent->of_node) > @@ -35,30 +35,9 @@ int tpm_read_log_of(struct tpm_chip *chip) > if (of_property_read_bool(np, "powered-while-suspended")) > chip->flags |= TPM_CHIP_FLAG_ALWAYS_POWERED; > > - sizep = of_get_property(np, "linux,sml-size", NULL); > - basep = of_get_property(np, "linux,sml-base", NULL); > - if (sizep == NULL && basep == NULL) > - return -ENODEV; > - if (sizep == NULL || basep == NULL) > - return -EIO; > - > - /* > - * For both vtpm/tpm, firmware has log addr and log size in big > - * endian format. But in case of vtpm, there is a method called > - * sml-handover which is run during kernel init even before > - * device tree is setup. This sml-handover function takes care > - * of endianness and writes to sml-base and sml-size in little > - * endian format. For this reason, vtpm doesn't need conversion > - * but physical tpm needs the conversion. > - */ > - if (of_property_match_string(np, "compatible", "IBM,vtpm") < 0 && > - of_property_match_string(np, "compatible", "IBM,vtpm20") < 0) { > - size = be32_to_cpup((__force __be32 *)sizep); > - base = be64_to_cpup((__force __be64 *)basep); > - } else { > - size = *sizep; > - base = *basep; > - } > + ret = of_tpm_get_sml_parameters(np, &base, &size); > + if (ret < 0) > + return ret; > > if (size == 0) { > dev_warn(&chip->dev, "%s: Event log area empty\n", __func__); > -- > 2.35.1 >
Looks good to me. Reviewed-by: Jarkko Sakkinen <[email protected]> BR, Jarkko _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
