Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1254633

Re: [PATCH 3/3] ACPI/APEI/EINJ: Allow memory error injection to NVDIMM

Show all headers | View raw

On Thu, 2015-10-22 at 17:14 -0700, Dan Williams wrote:
> On Thu, Oct 22, 2015 at 4:20 PM, Toshi Kani <toshi.kani@hpe.com> wrote:
> > In the case of memory error injection, einj_error_inject() checks
> > if a target address is regular RAM.  Change this check to allow
> > injecting a memory error to both RAM and NVDIMM so that memory
> > errors can be tested on NVDIMM as well.
> > 
> > Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
> > ---
> >  drivers/acpi/apei/einj.c |   12 ++++++++----
> >  1 file changed, 8 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
> > index 0431883..696f45a 100644
> > --- a/drivers/acpi/apei/einj.c
> > +++ b/drivers/acpi/apei/einj.c
> > @@ -519,7 +519,7 @@ static int
> (u32 type, u32 flags, u64 param1, u64 param2,
> >                              u64 param3, u64 param4)
> >  {
> >         int rc;
> > -       unsigned long pfn;
> > +       u64 base_addr, size;
> > 
> >         /* If user manually set "flags", make sure it is legal */
> >         if (flags && (flags &
> > @@ -545,10 +545,14 @@ static int einj_error_inject(u32 type, u32 flags, u64
> > param1, u64 param2,
> >         /*
> >          * Disallow crazy address masks that give BIOS leeway to pick
> >          * injection address almost anywhere. Insist on page or
> > -        * better granularity and that target address is normal RAM.
> > +        * better granularity and that target address is normal RAM or
> > +        * NVDIMM.
> >          */
> > -       pfn = PFN_DOWN(param1 & param2);
> > -       if (!page_is_ram(pfn) || ((param2 & PAGE_MASK) != PAGE_MASK))
> > +       base_addr = param1 & param2;
> > +       size = (~param2) + 1;
> > +       if (((!page_is_ram(PFN_DOWN(base_addr))) &&
> > +            (region_intersects_pmem(base_addr, size) != REGION_INTERSECTS))
> > ||
> > +           ((param2 & PAGE_MASK) != PAGE_MASK))
> 
> Hmm, should we also convert the page_is_ram() call to
> region_intersects_ram() so that we check the entire range from
> base_addr to base_addr + size?

Agreed.  I will update to use region_intersects_ram().

Thanks,
-Toshi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/3] Allow EINJ to inject memory error to NVDIMM Toshi Kani <toshi.kani@hpe.com> - 2015-10-23 01:30 +0200
  [PATCH 1/3] resource: Add @flags to region_intersects() Toshi Kani <toshi.kani@hpe.com> - 2015-10-23 01:30 +0200
  [PATCH 3/3] ACPI/APEI/EINJ: Allow memory error injection to NVDIMM Toshi Kani <toshi.kani@hpe.com> - 2015-10-23 01:30 +0200
    Re: [PATCH 3/3] ACPI/APEI/EINJ: Allow memory error injection to NVDIMM Dan Williams <dan.j.williams@intel.com> - 2015-10-23 02:20 +0200
      Re: [PATCH 3/3] ACPI/APEI/EINJ: Allow memory error injection to  NVDIMM Toshi Kani <toshi.kani@hpe.com> - 2015-10-23 16:10 +0200
  [PATCH 2/3] resource: Add region_intersects_pmem() Toshi Kani <toshi.kani@hpe.com> - 2015-10-23 01:30 +0200

csiph-web