On Fri, Oct 08, 2021 at 08:28:55AM +0200, Andrew Jones wrote:
> On Thu, Oct 07, 2021 at 11:32:30AM -0700, Ricardo Koller wrote:
> > Add a command line arg to arm/micro-bench to set the mmio_addr to other
> > values besides the default QEMU one. Default to the QEMU value if no arg
> > is passed. Also, the <NUM> in mmio_addr=<NUM> can't be a hex.
>
> I'll send this patch
>
> diff --git a/lib/util.c b/lib/util.c
> index a90554138952..682ca2db09e6 100644
> --- a/lib/util.c
> +++ b/lib/util.c
> @@ -4,6 +4,7 @@
> * This work is licensed under the terms of the GNU LGPL, version 2.
> */
> #include <libcflat.h>
> +#include <stdlib.h>
> #include "util.h"
>
> int parse_keyval(char *s, long *val)
> @@ -14,6 +15,6 @@ int parse_keyval(char *s, long *val)
> if (!p)
> return -1;
>
> - *val = atol(p+1);
> + *val = strtol(p+1, NULL, 0);
> return p - s;
> }
>
>
> which ought to improve that.
>
Nice! thanks, just sent a V2 that uses it.
> >
> > Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
> > ---
> > arm/micro-bench.c | 33 +++++++++++++++++++++++++++------
> > 1 file changed, 27 insertions(+), 6 deletions(-)
> >
> > diff --git a/arm/micro-bench.c b/arm/micro-bench.c
> > index 8e1d4ab..2c08813 100644
> > --- a/arm/micro-bench.c
> > +++ b/arm/micro-bench.c
> > @@ -19,16 +19,19 @@
> > * This work is licensed under the terms of the GNU LGPL, version 2.
> > */
> > #include <libcflat.h>
> > +#include <util.h>
> > #include <asm/gic.h>
> > #include <asm/gic-v3-its.h>
> > #include <asm/timer.h>
> >
> > -#define NS_5_SECONDS (5 * 1000 * 1000 * 1000UL)
> > +#define NS_5_SECONDS (5 * 1000 * 1000 * 1000UL)
> > +#define QEMU_MMIO_ADDR 0x0a000008
> >
> > static u32 cntfrq;
> >
> > static volatile bool irq_ready, irq_received;
> > static int nr_ipi_received;
> > +static unsigned long mmio_addr = QEMU_MMIO_ADDR;
> >
> > static void *vgic_dist_base;
> > static void (*write_eoir)(u32 irqstat);
> > @@ -278,12 +281,10 @@ static void *userspace_emulated_addr;
> > static bool mmio_read_user_prep(void)
> > {
> > /*
> > - * FIXME: Read device-id in virtio mmio here in order to
> > - * force an exit to userspace. This address needs to be
> > - * updated in the future if any relevant changes in QEMU
> > - * test-dev are made.
>
> I think the FIXME is still relavent, even with the user given control over
> the address. The FIXME text could be improved though, because it's not
> clear what it's trying to say, which is
>
> /*
> * FIXME: We need an MMIO address that we can safely read to test
> * exits to userspace. Ideally, the test-dev would provide us this
> * address (and one we could write to too), but until it does we
> * use a virtio-mmio transport address. FIXME2: We should be getting
> * this address (and the future test-dev address) from the devicetree,
> * but so far we lazily hardcode it.
> */
>
ACK
> > + * Read device-id in virtio mmio here in order to
> > + * force an exit to userspace.
> > */
> > - userspace_emulated_addr = (void*)ioremap(0x0a000008, sizeof(u32));
> > + userspace_emulated_addr = (void *)ioremap(mmio_addr, sizeof(u32));
> > return true;
> > }
> >
> > @@ -378,10 +379,30 @@ static void loop_test(struct exit_test *test)
> > test->name, total_ns.ns, total_ns.ns_frac, avg_ns.ns, avg_ns.ns_frac);
> > }
> >
> > +static void parse_args(int argc, char **argv)
> > +{
> > + int i, len;
> > + long val;
> > +
> > + for (i = 0; i < argc; ++i) {
> ^ should be 1, since we know argv[0] is prognam
>
ACK
> > + len = parse_keyval(argv[i], &val);
> > + if (len == -1)
> > + continue;
> > +
> > + argv[i][len] = '\0';
>
> Not nice to write to the global args, especially when we're not yet sure
> if this arg is the one we care about.
>
ACK, fixing that.
> > + if (strcmp(argv[i], "mmio-addr") == 0) {
>
> Can use strncmp to avoid the not nice args write,
>
> strncmp(argv[i], "mmio-addr", len)
>
ACK, will use strncmp instead.
> > + mmio_addr = val;
> > + report_info("found mmio_addr=0x%lx", mmio_addr);
> > + }
> > + }
> > +}
> > +
> > int main(int argc, char **argv)
> > {
> > int i;
> >
> > + parse_args(argc, argv);
> > +
> > if (!test_init())
> > return 1;
> >
> > --
> > 2.33.0.882.g93a45727a2-goog
> >
>
> Thanks,
> drew
>
Thanks,
Ricardo
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