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powerpc/fsl_booke: Tell map_mem_in_cams() if init is done 

In order to be able to call map_mem_in_cams() once more
after init for STRICT_KERNEL_RWX, add an argument.

For now, map_mem_in_cams() is always called only during init.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3b69a7e0b393b16984ade882a5eae5d727717459.1634292136.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-10-15 12:02:46 +02:00 committed by Michael Ellerman
parent a97dd9e2f7
commit 52bda69ae8
4 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/mm/mmu_decl.h
View File

@ -126,7 +126,7 @@ unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
#ifdef CONFIG_PPC_FSL_BOOK3E
extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
bool dryrun);
bool dryrun, bool init);
extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
phys_addr_t phys);
#ifdef CONFIG_PPC32

12
arch/powerpc/mm/nohash/fsl_book3e.c
View File

@ -167,7 +167,7 @@ unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
unsigned long ram, int max_cam_idx,
bool dryrun)
bool dryrun, bool init)
{
int i;
unsigned long amount_mapped = 0;
@ -202,12 +202,12 @@ static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
return amount_mapped;
}
unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun)
unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun, bool init)
{
unsigned long virt = PAGE_OFFSET;
phys_addr_t phys = memstart_addr;
return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun);
return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun, init);
}
#ifdef CONFIG_PPC32
@ -248,7 +248,7 @@ void __init adjust_total_lowmem(void)
ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
i = switch_to_as1();
__max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false);
__max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false, true);
restore_to_as0(i, 0, 0, 1);
pr_info("Memory CAM mapping: ");
@ -319,11 +319,11 @@ notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
/* map a 64M area for the second relocation */
if (memstart_addr > start)
map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM,
false);
false, true);
else
map_mem_in_cams_addr(start, PAGE_OFFSET + offset,
0x4000000, CONFIG_LOWMEM_CAM_NUM,
false);
false, true);
restore_to_as0(n, offset, __va(dt_ptr), 1);
/* We should never reach here */
panic("Relocation error");

2
arch/powerpc/mm/nohash/kaslr_booke.c
View File

@ -314,7 +314,7 @@ static unsigned long __init kaslr_choose_location(void *dt_ptr, phys_addr_t size
pr_warn("KASLR: No safe seed for randomizing the kernel base.\n");
ram = min_t(phys_addr_t, __max_low_memory, size);
ram = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, true);
ram = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, true, false);
linear_sz = min_t(unsigned long, ram, SZ_512M);
/* If the linear size is smaller than 64M, do not randmize */

4
arch/powerpc/mm/nohash/tlb.c
View File

@ -643,7 +643,7 @@ static void early_init_this_mmu(void)
if (map)
linear_map_top = map_mem_in_cams(linear_map_top,
num_cams, false);
num_cams, true, true);
}
#endif
@ -764,7 +764,7 @@ void setup_initial_memory_limit(phys_addr_t first_memblock_base,
num_cams = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) / 4;
linear_sz = map_mem_in_cams(first_memblock_size, num_cams,
true);
false, true);
ppc64_rma_size = min_t(u64, linear_sz, 0x40000000);
} else