Re: [Qemu-devel] [PATCH] hw/mips: align initrd to 64KB to avoid kernel error

[Leon Alrae <leon.alrae@imgtec.com>]

ping

On 10/07/13 16:01, Leon Alrae wrote:
> ping
> 
> http://patchwork.ozlabs.org/patch/255005/
> 
> On 27/06/13 08:35, Leon Alrae wrote:
>> From: James Hogan <james.hogan@imgtec.com>
>>
>> The Linux kernel can be configured to use 64KB pages, but it also
>> requires initrd to be page aligned. Therefore, to be safe, align the
>> initrd to 64KB using a new INITRD_PAGE_MASK rather than
>> TARGET_PAGE_MASK.
>>
>> Signed-off-by: James Hogan <james.hogan@imgtec.com>
>> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
>> ---
>>  hw/mips/mips_fulong2e.c |    2 +-
>>  hw/mips/mips_malta.c    |    2 +-
>>  hw/mips/mips_mipssim.c  |    2 +-
>>  hw/mips/mips_r4k.c      |    2 +-
>>  include/hw/mips/mips.h  |    3 +++
>>  5 files changed, 7 insertions(+), 4 deletions(-)
>>
>> diff --git a/hw/mips/mips_fulong2e.c b/hw/mips/mips_fulong2e.c
>> index 1aac93a..c03a4f2 100644
>> --- a/hw/mips/mips_fulong2e.c
>> +++ b/hw/mips/mips_fulong2e.c
>> @@ -126,7 +126,7 @@ static int64_t load_kernel (CPUMIPSState *env)
>>      if (loaderparams.initrd_filename) {
>>          initrd_size = get_image_size (loaderparams.initrd_filename);
>>          if (initrd_size > 0) {
>> -            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
>> +            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
>>              if (initrd_offset + initrd_size > ram_size) {
>>                  fprintf(stderr,
>>                          "qemu: memory too small for initial ram disk '%s'\n",
>> diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
>> index 5033d51..526a122 100644
>> --- a/hw/mips/mips_malta.c
>> +++ b/hw/mips/mips_malta.c
>> @@ -699,7 +699,7 @@ static int64_t load_kernel (void)
>>      if (loaderparams.initrd_filename) {
>>          initrd_size = get_image_size (loaderparams.initrd_filename);
>>          if (initrd_size > 0) {
>> -            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
>> +            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
>>              if (initrd_offset + initrd_size > ram_size) {
>>                  fprintf(stderr,
>>                          "qemu: memory too small for initial ram disk '%s'\n",
>> diff --git a/hw/mips/mips_mipssim.c b/hw/mips/mips_mipssim.c
>> index d1681ec..3f54e64 100644
>> --- a/hw/mips/mips_mipssim.c
>> +++ b/hw/mips/mips_mipssim.c
>> @@ -83,7 +83,7 @@ static int64_t load_kernel(void)
>>      if (loaderparams.initrd_filename) {
>>          initrd_size = get_image_size (loaderparams.initrd_filename);
>>          if (initrd_size > 0) {
>> -            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
>> +            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
>>              if (initrd_offset + initrd_size > loaderparams.ram_size) {
>>                  fprintf(stderr,
>>                          "qemu: memory too small for initial ram disk '%s'\n",
>> diff --git a/hw/mips/mips_r4k.c b/hw/mips/mips_r4k.c
>> index 4646ab6..fb7eb14 100644
>> --- a/hw/mips/mips_r4k.c
>> +++ b/hw/mips/mips_r4k.c
>> @@ -102,7 +102,7 @@ static int64_t load_kernel(void)
>>      if (loaderparams.initrd_filename) {
>>          initrd_size = get_image_size (loaderparams.initrd_filename);
>>          if (initrd_size > 0) {
>> -            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
>> +            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
>>              if (initrd_offset + initrd_size > ram_size) {
>>                  fprintf(stderr,
>>                          "qemu: memory too small for initial ram disk '%s'\n",
>> diff --git a/include/hw/mips/mips.h b/include/hw/mips/mips.h
>> index 291e85f..2a7a9c9 100644
>> --- a/include/hw/mips/mips.h
>> +++ b/include/hw/mips/mips.h
>> @@ -2,6 +2,9 @@
>>  #define HW_MIPS_H
>>  /* Definitions for mips board emulation.  */
>>  
>> +/* Kernels can be configured with 64KB pages */
>> +#define INITRD_PAGE_MASK (~((1 << 16) - 1))
>> +
>>  #include "exec/memory.h"
>>  
>>  /* gt64xxx.c */
>