Re: [PATCH 1/2] hw/cxl: Fix endian handling for decoder commit.

[Jonathan Cameron]

On Tue, 21 Mar 2023 19:28:02 +0000
Fan Ni <fan.ni@samsung.com> wrote:

> On Tue, Mar 21, 2023 at 06:00:11PM +0000, Jonathan Cameron wrote:
> > Not a real problem yet as all supported architectures are
> > little endian, but continue to tidy these up when touching
> > code for other reasons.
> > 
> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>  
> 
> Hi Jonathan,
> Did you forget to send the other patch in this series by any chance?

No. All 3 emails went out, but not all seem to have made it to the lists.
I have them via an internal reflector so maybe a Huawei network glitch.
Odd. I'll try a resend.  Thanks for pointing this out!

Jonathan

> 
> Fan
> > ---
> >  hw/cxl/cxl-component-utils.c | 10 ++++------
> >  hw/mem/cxl_type3.c           |  9 ++++++---
> >  2 files changed, 10 insertions(+), 9 deletions(-)
> > 
> > diff --git a/hw/cxl/cxl-component-utils.c b/hw/cxl/cxl-component-utils.c
> > index b665d4f565..a3e6cf75cf 100644
> > --- a/hw/cxl/cxl-component-utils.c
> > +++ b/hw/cxl/cxl-component-utils.c
> > @@ -47,14 +47,12 @@ static void dumb_hdm_handler(CXLComponentState 
> > *cxl_cstate, hwaddr offset,
> >          break;
> >      }
> >  
> > -    memory_region_transaction_begin();
> > -    stl_le_p((uint8_t *)cache_mem + offset, value);
> >      if (should_commit) {
> > -        ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, COMMIT, 0);
> > -        ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, ERR, 0);
> > -        ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, COMMITTED, 1);
> > +        value = FIELD_DP32(value, CXL_HDM_DECODER0_CTRL, COMMIT, 0);
> > +        value = FIELD_DP32(value, CXL_HDM_DECODER0_CTRL, ERR, 0);
> > +        value = FIELD_DP32(value, CXL_HDM_DECODER0_CTRL, COMMITTED, 1);
> >      }
> > -    memory_region_transaction_commit();
> > +    stl_le_p((uint8_t *)cache_mem + offset, value);
> >  }
> >  
> >  static void cxl_cache_mem_write_reg(void *opaque, hwaddr offset, uint64_t 
> > value,
> > diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c
> > index abe60b362c..846089ccda 100644
> > --- a/hw/mem/cxl_type3.c
> > +++ b/hw/mem/cxl_type3.c
> > @@ -314,14 +314,17 @@ static void hdm_decoder_commit(CXLType3Dev *ct3d, int 
> > which)
> >  {
> >      ComponentRegisters *cregs = &ct3d->cxl_cstate.crb;
> >      uint32_t *cache_mem = cregs->cache_mem_registers;
> > +    uint32_t ctrl;
> >  
> >      assert(which == 0);
> >  
> > +    ctrl = ldl_le_p(cache_mem + R_CXL_HDM_DECODER0_CTRL);
> >      /* TODO: Sanity checks that the decoder is possible */
> > -    ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, COMMIT, 0);
> > -    ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, ERR, 0);
> > +    ctrl = FIELD_DP32(ctrl, CXL_HDM_DECODER0_CTRL, COMMIT, 0);
> > +    ctrl = FIELD_DP32(ctrl, CXL_HDM_DECODER0_CTRL, ERR, 0);
> > +    ctrl = FIELD_DP32(ctrl, CXL_HDM_DECODER0_CTRL, COMMITTED, 1);
> >  
> > -    ARRAY_FIELD_DP32(cache_mem, CXL_HDM_DECODER0_CTRL, COMMITTED, 1);
> > +    stl_le_p(cache_mem + R_CXL_HDM_DECODER0_CTRL, ctrl);
> >  }
> >  
> >  static int ct3d_qmp_uncor_err_to_cxl(CxlUncorErrorType qmp_err)
> > -- 
> > 2.37.2
> >