[PATCH 4/5] perf: arm_spe: Decode memory tagging properties

[Arnaldo Carvalho de Melo]

Em Sun, Sep 27, 2020 at 11:19:18AM +0800, Leo Yan escreveu:
> On Tue, Sep 22, 2020 at 11:12:24AM +0100, Andre Przywara wrote:
> > When SPE records a physical address, it can additionally tag the event
> > with information from the Memory Tagging architecture extension.
> > 
> > Decode the two additional fields in the SPE event payload.
> > 
> > Signed-off-by: Andre Przywara <andre.przywara at arm.com>
> > ---
> >  .../util/arm-spe-decoder/arm-spe-pkt-decoder.c  | 17 ++++++++++++-----
> >  1 file changed, 12 insertions(+), 5 deletions(-)
> > 
> > diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> > index 943e4155b246..a033f34846a6 100644
> > --- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> > +++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
> > @@ -8,13 +8,14 @@
> >  #include <string.h>
> >  #include <endian.h>
> >  #include <byteswap.h>
> > +#include <linux/bits.h>
> >  
> >  #include "arm-spe-pkt-decoder.h"
> >  
> > -#define BIT(n)		(1ULL << (n))
> > -
> >  #define NS_FLAG		BIT(63)
> >  #define EL_FLAG		(BIT(62) | BIT(61))
> > +#define CH_FLAG		BIT(62)
> > +#define PAT_FLAG	GENMASK_ULL(59, 56)
> >  
> >  #define SPE_HEADER0_PAD			0x0
> >  #define SPE_HEADER0_END			0x1
> > @@ -447,10 +448,16 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
> >  			return snprintf(buf, buf_len, "%s 0x%llx el%d ns=%d",
> >  				        (idx == 1) ? "TGT" : "PC", payload, el, ns);
> >  		case 2:	return snprintf(buf, buf_len, "VA 0x%llx", payload);
> > -		case 3:	ns = !!(packet->payload & NS_FLAG);
> > +		case 3:	{
> > +			int ch = !!(packet->payload & CH_FLAG);
> > +			int pat = (packet->payload & PAT_FLAG) >> 56;
> > +
> > +			ns = !!(packet->payload & NS_FLAG);
> >  			payload &= ~(0xffULL << 56);
> > -			return snprintf(buf, buf_len, "PA 0x%llx ns=%d",
> > -					payload, ns);
> > +			return snprintf(buf, buf_len,
> > +					"PA 0x%llx ns=%d ch=%d, pat=%x",
> > +					payload, ns, ch, pat);
> > +			}
> 
> Reviewed-by: Leo Yan <leo.yan at linaro.org>

Thanks, applied.

- Arnaldo