| Message ID | 20180520101542.12206-5-digetx@gmail.com |
|---|---|
| State | Deferred |
| Headers | show |
| Series | Initial support of Trusted Foundations on Tegra30 | expand |
On 20.05.2018 13:15, Dmitry Osipenko wrote: > CPU isn't allowed to touch secure registers while running under secure > monitor. Hence skip applying CPU erratas in the reset handler if Trusted > Foundations firmware presents. > > Signed-off-by: Dmitry Osipenko <digetx@gmail.com> > --- > arch/arm/mach-tegra/reset-handler.S | 27 +++++++++++++++++++-------- > arch/arm/mach-tegra/reset.c | 3 +++ > arch/arm/mach-tegra/reset.h | 4 +++- > 3 files changed, 25 insertions(+), 9 deletions(-) > > diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S > index 805f306fa6f7..d84c74a95806 100644 > --- a/arch/arm/mach-tegra/reset-handler.S > +++ b/arch/arm/mach-tegra/reset-handler.S > @@ -121,6 +121,12 @@ ENTRY(__tegra_cpu_reset_handler) > cpsid aif, 0x13 @ SVC mode, interrupts disabled > > tegra_get_soc_id TEGRA_APB_MISC_BASE, r6 > + > + adr r12, __tegra_cpu_reset_handler_data > + ldr r0, [r12, #RESET_DATA(TF_PRESENT)] > + cmp r0, #0 > + bne after_errata > + > #ifdef CONFIG_ARCH_TEGRA_2x_SOC > t20_check: > cmp r6, #TEGRA20 > @@ -155,7 +161,6 @@ after_errata: > and r10, r10, #0x3 @ R10 = CPU number > mov r11, #1 > mov r11, r11, lsl r10 @ R11 = CPU mask > - adr r12, __tegra_cpu_reset_handler_data > > #ifdef CONFIG_SMP > /* Does the OS know about this CPU? */ > @@ -169,10 +174,9 @@ after_errata: > cmp r6, #TEGRA20 > bne 1f > /* If not CPU0, don't let CPU0 reset CPU1 now that CPU1 is coming up. */ > - mov32 r5, TEGRA_IRAM_BASE + TEGRA_IRAM_RESET_HANDLER_OFFSET > mov r0, #CPU_NOT_RESETTABLE > cmp r10, #0 > - strneb r0, [r5, #__tegra20_cpu1_resettable_status_offset] > + strneb r0, [r12, #RESET_DATA(RESETTABLE_STATUS)] > 1: > #endif > > @@ -278,13 +282,20 @@ ENDPROC(__tegra_cpu_reset_handler) > .type __tegra_cpu_reset_handler_data, %object > .globl __tegra_cpu_reset_handler_data > __tegra_cpu_reset_handler_data: > - .rept TEGRA_RESET_DATA_SIZE > - .long 0 > - .endr > + .long 0 /* TEGRA_RESET_MASK_PRESENT */ > + .long 0 /* TEGRA_RESET_MASK_LP1 */ > + .long 0 /* TEGRA_RESET_MASK_LP2 */ > + .long 0 /* TEGRA_RESET_STARTUP_SECONDARY */ > + .long 0 /* TEGRA_RESET_STARTUP_LP2 */ > + .long 0 /* TEGRA_RESET_STARTUP_LP1 */ > + > .globl __tegra20_cpu1_resettable_status_offset > .equ __tegra20_cpu1_resettable_status_offset, \ > . - __tegra_cpu_reset_handler_start > - .byte 0 > - .align L1_CACHE_SHIFT > + .long 0 /* TEGRA_RESET_RESETTABLE_STATUS */ > > + .globl __tegra_tf_present > + .equ __tegra_tf_present, . - __tegra_cpu_reset_handler_start I've noticed that __tegra_tf_present shouldn't belong to this patch, I've missed to remove it while was rebasing. Also, it occurred to me that it will be much better to remove the whole array __tegra_cpu_reset_handler_data definition in the asm and get back to the original ".rept TEGRA_RESET_DATA_SIZE" instead. That will make this part of code much nicer, I'll change that in v2. Russell / Thierry, please give you acks-reviews where appropriate and let me know if I should change anything else in v2, thanks. > + .long 0 /* TEGRA_RESET_TF_PRESENT */ > + .align L1_CACHE_SHIFT > ENTRY(__tegra_cpu_reset_handler_end) > diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c > index dc558892753c..b02ae7699842 100644 > --- a/arch/arm/mach-tegra/reset.c > +++ b/arch/arm/mach-tegra/reset.c > @@ -24,6 +24,7 @@ > #include <asm/cacheflush.h> > #include <asm/firmware.h> > #include <asm/hardware/cache-l2x0.h> > +#include <asm/trusted_foundations.h> > > #include "iomap.h" > #include "irammap.h" > @@ -89,6 +90,8 @@ static void __init tegra_cpu_reset_handler_enable(void) > > void __init tegra_cpu_reset_handler_init(void) > { > + __tegra_cpu_reset_handler_data[TEGRA_RESET_TF_PRESENT] = > + trusted_foundations_registered(); > > #ifdef CONFIG_SMP > __tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_PRESENT] = > diff --git a/arch/arm/mach-tegra/reset.h b/arch/arm/mach-tegra/reset.h > index 9c479c7925b8..0d9ddc022ece 100644 > --- a/arch/arm/mach-tegra/reset.h > +++ b/arch/arm/mach-tegra/reset.h > @@ -25,7 +25,9 @@ > #define TEGRA_RESET_STARTUP_SECONDARY 3 > #define TEGRA_RESET_STARTUP_LP2 4 > #define TEGRA_RESET_STARTUP_LP1 5 > -#define TEGRA_RESET_DATA_SIZE 6 > +#define TEGRA_RESET_RESETTABLE_STATUS 6 > +#define TEGRA_RESET_TF_PRESENT 7 > +#define TEGRA_RESET_DATA_SIZE 8 > > #ifndef __ASSEMBLY__ > > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S index 805f306fa6f7..d84c74a95806 100644 --- a/arch/arm/mach-tegra/reset-handler.S +++ b/arch/arm/mach-tegra/reset-handler.S @@ -121,6 +121,12 @@ ENTRY(__tegra_cpu_reset_handler) cpsid aif, 0x13 @ SVC mode, interrupts disabled tegra_get_soc_id TEGRA_APB_MISC_BASE, r6 + + adr r12, __tegra_cpu_reset_handler_data + ldr r0, [r12, #RESET_DATA(TF_PRESENT)] + cmp r0, #0 + bne after_errata + #ifdef CONFIG_ARCH_TEGRA_2x_SOC t20_check: cmp r6, #TEGRA20 @@ -155,7 +161,6 @@ after_errata: and r10, r10, #0x3 @ R10 = CPU number mov r11, #1 mov r11, r11, lsl r10 @ R11 = CPU mask - adr r12, __tegra_cpu_reset_handler_data #ifdef CONFIG_SMP /* Does the OS know about this CPU? */ @@ -169,10 +174,9 @@ after_errata: cmp r6, #TEGRA20 bne 1f /* If not CPU0, don't let CPU0 reset CPU1 now that CPU1 is coming up. */ - mov32 r5, TEGRA_IRAM_BASE + TEGRA_IRAM_RESET_HANDLER_OFFSET mov r0, #CPU_NOT_RESETTABLE cmp r10, #0 - strneb r0, [r5, #__tegra20_cpu1_resettable_status_offset] + strneb r0, [r12, #RESET_DATA(RESETTABLE_STATUS)] 1: #endif @@ -278,13 +282,20 @@ ENDPROC(__tegra_cpu_reset_handler) .type __tegra_cpu_reset_handler_data, %object .globl __tegra_cpu_reset_handler_data __tegra_cpu_reset_handler_data: - .rept TEGRA_RESET_DATA_SIZE - .long 0 - .endr + .long 0 /* TEGRA_RESET_MASK_PRESENT */ + .long 0 /* TEGRA_RESET_MASK_LP1 */ + .long 0 /* TEGRA_RESET_MASK_LP2 */ + .long 0 /* TEGRA_RESET_STARTUP_SECONDARY */ + .long 0 /* TEGRA_RESET_STARTUP_LP2 */ + .long 0 /* TEGRA_RESET_STARTUP_LP1 */ + .globl __tegra20_cpu1_resettable_status_offset .equ __tegra20_cpu1_resettable_status_offset, \ . - __tegra_cpu_reset_handler_start - .byte 0 - .align L1_CACHE_SHIFT + .long 0 /* TEGRA_RESET_RESETTABLE_STATUS */ + .globl __tegra_tf_present + .equ __tegra_tf_present, . - __tegra_cpu_reset_handler_start + .long 0 /* TEGRA_RESET_TF_PRESENT */ + .align L1_CACHE_SHIFT ENTRY(__tegra_cpu_reset_handler_end) diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c index dc558892753c..b02ae7699842 100644 --- a/arch/arm/mach-tegra/reset.c +++ b/arch/arm/mach-tegra/reset.c @@ -24,6 +24,7 @@ #include <asm/cacheflush.h> #include <asm/firmware.h> #include <asm/hardware/cache-l2x0.h> +#include <asm/trusted_foundations.h> #include "iomap.h" #include "irammap.h" @@ -89,6 +90,8 @@ static void __init tegra_cpu_reset_handler_enable(void) void __init tegra_cpu_reset_handler_init(void) { + __tegra_cpu_reset_handler_data[TEGRA_RESET_TF_PRESENT] = + trusted_foundations_registered(); #ifdef CONFIG_SMP __tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_PRESENT] = diff --git a/arch/arm/mach-tegra/reset.h b/arch/arm/mach-tegra/reset.h index 9c479c7925b8..0d9ddc022ece 100644 --- a/arch/arm/mach-tegra/reset.h +++ b/arch/arm/mach-tegra/reset.h @@ -25,7 +25,9 @@ #define TEGRA_RESET_STARTUP_SECONDARY 3 #define TEGRA_RESET_STARTUP_LP2 4 #define TEGRA_RESET_STARTUP_LP1 5 -#define TEGRA_RESET_DATA_SIZE 6 +#define TEGRA_RESET_RESETTABLE_STATUS 6 +#define TEGRA_RESET_TF_PRESENT 7 +#define TEGRA_RESET_DATA_SIZE 8 #ifndef __ASSEMBLY__
CPU isn't allowed to touch secure registers while running under secure monitor. Hence skip applying CPU erratas in the reset handler if Trusted Foundations firmware presents. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- arch/arm/mach-tegra/reset-handler.S | 27 +++++++++++++++++++-------- arch/arm/mach-tegra/reset.c | 3 +++ arch/arm/mach-tegra/reset.h | 4 +++- 3 files changed, 25 insertions(+), 9 deletions(-)