From: Bai Yingjie <[email protected]>
When CONFIG_RELOCATABLE=y is set, VIRT_PHYS_OFFSET is a 64bit variable,
thus __pa() returns as 64bit value.
But when CONFIG_RELOCATABLE=n, __pa() returns 32bit value.
When CONFIG_PHYS_64BIT is set, __pa() should consistently return as
64bit value irrelevant to CONFIG_RELOCATABLE.
So we'd make __pa() consistently return phys_addr_t, which is 64bit
when CONFIG_PHYS_64BIT is set.
Signed-off-by: Bai Yingjie <[email protected]>
---
arch/powerpc/include/asm/page.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 7f1fd41e3065..86332080399a 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -209,7 +209,7 @@ static inline bool pfn_valid(unsigned long pfn)
*/
#if defined(CONFIG_PPC32) && defined(CONFIG_BOOKE)
#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + VIRT_PHYS_OFFSET))
-#define __pa(x) ((unsigned long)(x) - VIRT_PHYS_OFFSET)
+#define __pa(x) ((phys_addr_t)(unsigned long)(x) - VIRT_PHYS_OFFSET)
#else
#ifdef CONFIG_PPC64
/*
--
2.17.1
From: Bai Yingjie <[email protected]>
CPU like P4080 has 36bit physical address, its DDR physical
start address can be configured above 4G by LAW registers.
For such systems in which their physical memory start address was
configured higher than 4G, we need also to write addr_h into the spin
table of the target secondary CPU, so that addr_h and addr_l together
represent a 64bit physical address.
Otherwise the secondary core can not get correct entry to start from.
Signed-off-by: Bai Yingjie <[email protected]>
---
arch/powerpc/platforms/85xx/smp.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c
index 8c7ea2486bc0..48f7d96ae37d 100644
--- a/arch/powerpc/platforms/85xx/smp.c
+++ b/arch/powerpc/platforms/85xx/smp.c
@@ -252,6 +252,15 @@ static int smp_85xx_start_cpu(int cpu)
out_be64((u64 *)(&spin_table->addr_h),
__pa(ppc_function_entry(generic_secondary_smp_init)));
#else
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+ /*
+ * We need also to write addr_h to spin table for systems
+ * in which their physical memory start address was configured
+ * to above 4G, otherwise the secondary core can not get
+ * correct entry to start from.
+ */
+ out_be32(&spin_table->addr_h, __pa(__early_start) >> 32);
+#endif
out_be32(&spin_table->addr_l, __pa(__early_start));
#endif
flush_spin_table(spin_table);
--
2.17.1
On Mon, 2020-01-06 at 12:29 +0800, [email protected] wrote:
> From: Bai Yingjie <[email protected]>
>
> CPU like P4080 has 36bit physical address, its DDR physical
> start address can be configured above 4G by LAW registers.
>
> For such systems in which their physical memory start address was
> configured higher than 4G, we need also to write addr_h into the spin
> table of the target secondary CPU, so that addr_h and addr_l together
> represent a 64bit physical address.
> Otherwise the secondary core can not get correct entry to start from.
>
> Signed-off-by: Bai Yingjie <[email protected]>
> ---
> arch/powerpc/platforms/85xx/smp.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
Acked-by: Scott Wood <[email protected]>
-Scott
On Mon, 2020-01-06 at 04:29:53 UTC, [email protected] wrote:
> From: Bai Yingjie <[email protected]>
>
> When CONFIG_RELOCATABLE=y is set, VIRT_PHYS_OFFSET is a 64bit variable,
> thus __pa() returns as 64bit value.
> But when CONFIG_RELOCATABLE=n, __pa() returns 32bit value.
>
> When CONFIG_PHYS_64BIT is set, __pa() should consistently return as
> 64bit value irrelevant to CONFIG_RELOCATABLE.
> So we'd make __pa() consistently return phys_addr_t, which is 64bit
> when CONFIG_PHYS_64BIT is set.
>
> Signed-off-by: Bai Yingjie <[email protected]>
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/6ad4afc97bc6c5cca9786030492ddfab871ce79e
cheers