| Message ID | 1496901944-42140-1-git-send-email-xieyisheng1@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, 8 Jun 2017, Yisheng Xie wrote: > When both enable CONFIG_ARM_LPAE=y and CONFIG_VMSPLIT_3G_OPT=y, which > means use PAGE_OFFSET=0xB0000000 with ARM_LPAE, the kernel will boot > fail and stop after uncompressed: > > Starting kernel ... > > Uart base = 0x20001000 > watchdog reg = 0x20013000 > dtb addr = 0x80840308 > Uncompressing Linux... done, booting the kernel. > > For ARM_LPAE only support 3:1, 2:2, 1:3 split of TTBR1, which mention in: > http://elinux.org/images/6/6a/Elce11_marinas.pdf - p16 > > So we should make VMSPLIT_3G_OPT depends on !ARM_LPAE to avoid trigger > this bug. > > Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Acked-by: Nicolas Pitre <nico@linaro.org> > --- > arch/arm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 4c1a35f..c0fcab6 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -1416,6 +1416,7 @@ choice > config VMSPLIT_3G > bool "3G/1G user/kernel split" > config VMSPLIT_3G_OPT > + depends on !ARM_LPAE > bool "3G/1G user/kernel split (for full 1G low memory)" > config VMSPLIT_2G > bool "2G/2G user/kernel split" > -- > 1.7.12.4 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >
On Thu, Jun 08, 2017 at 02:05:44PM +0800, Yisheng Xie wrote: > When both enable CONFIG_ARM_LPAE=y and CONFIG_VMSPLIT_3G_OPT=y, which > means use PAGE_OFFSET=0xB0000000 with ARM_LPAE, the kernel will boot > fail and stop after uncompressed: > > Starting kernel ... > > Uart base = 0x20001000 > watchdog reg = 0x20013000 > dtb addr = 0x80840308 > Uncompressing Linux... done, booting the kernel. > > For ARM_LPAE only support 3:1, 2:2, 1:3 split of TTBR1, which mention in: > http://elinux.org/images/6/6a/Elce11_marinas.pdf - p16 > > So we should make VMSPLIT_3G_OPT depends on !ARM_LPAE to avoid trigger > this bug. Yes, this is much more preferable. Please drop it into the patch system, thanks.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 4c1a35f..c0fcab6 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1416,6 +1416,7 @@ choice config VMSPLIT_3G bool "3G/1G user/kernel split" config VMSPLIT_3G_OPT + depends on !ARM_LPAE bool "3G/1G user/kernel split (for full 1G low memory)" config VMSPLIT_2G bool "2G/2G user/kernel split"
When both enable CONFIG_ARM_LPAE=y and CONFIG_VMSPLIT_3G_OPT=y, which means use PAGE_OFFSET=0xB0000000 with ARM_LPAE, the kernel will boot fail and stop after uncompressed: Starting kernel ... Uart base = 0x20001000 watchdog reg = 0x20013000 dtb addr = 0x80840308 Uncompressing Linux... done, booting the kernel. For ARM_LPAE only support 3:1, 2:2, 1:3 split of TTBR1, which mention in: http://elinux.org/images/6/6a/Elce11_marinas.pdf - p16 So we should make VMSPLIT_3G_OPT depends on !ARM_LPAE to avoid trigger this bug. Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> --- arch/arm/Kconfig | 1 + 1 file changed, 1 insertion(+)