Messages in this thread | | | Subject | Re: [PATCH] riscv: Disallow to build XIP_KERNEL with SOC_SIFIVE | From | Alex Ghiti <> | Date | Thu, 29 Apr 2021 08:13:30 -0400 |
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Le 4/29/21 à 5:11 AM, Vitaly Wool a écrit : > On Thu, Apr 29, 2021 at 10:47 AM Alexandre Ghiti <alex@ghiti.fr> wrote: >> >> RISCV_ERRATA_ALTERNATIVE patches text at runtime which is not possible when >> the kernel is executed from the flash in XIP mode, and as the SIFIVE >> errata must be fixed somehow, disallow to build a XIP kernel that >> supports SIFIVE socs. > > Could you please hold off this patch for a bit? I will try to come up > with an alternative solution. It should be possible to define a > special section within the RW area and place the functions that need > such patching there. > Not that I like that much but at least we'll keep the ability to use > XIP on SiFive.
Ok, I'm wondering why I did not think of that...I'll give it a try just to punish myself.
Thanks Vitaly,
Alex
> > Best regards, > Vitaly > >> Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> >> --- >> arch/riscv/Kconfig.erratas | 2 +- >> arch/riscv/Kconfig.socs | 1 + >> 2 files changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/arch/riscv/Kconfig.erratas b/arch/riscv/Kconfig.erratas >> index d5d03ae8d685..9537dbd67357 100644 >> --- a/arch/riscv/Kconfig.erratas >> +++ b/arch/riscv/Kconfig.erratas >> @@ -2,7 +2,7 @@ menu "CPU errata selection" >> >> config RISCV_ERRATA_ALTERNATIVE >> bool "RISC-V alternative scheme" >> - default y >> + default y if !XIP_KERNEL >> help >> This Kconfig allows the kernel to automatically patch the >> errata required by the execution platform at run time. The >> diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs >> index 00c2b205654c..9cb38bc9d7cd 100644 >> --- a/arch/riscv/Kconfig.socs >> +++ b/arch/riscv/Kconfig.socs >> @@ -9,6 +9,7 @@ config SOC_MICROCHIP_POLARFIRE >> >> config SOC_SIFIVE >> bool "SiFive SoCs" >> + depends on !XIP_KERNEL >> select SERIAL_SIFIVE if TTY >> select SERIAL_SIFIVE_CONSOLE if TTY >> select CLK_SIFIVE >> -- >> 2.20.1 >> >> >> _______________________________________________ >> linux-riscv mailing list >> linux-riscv@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-riscv > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv >
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