Hi Andre,
I'm so pleased to see this series. Thank you!
On Thu, Nov 17, 2016 at 05:57:49PM +0000, Andre Przywara wrote:
> This adds an MMIO subtest to the GIC test.
> It accesses some generic GICv2 registers and does some sanity tests,
> like checking for some of them being read-only.
>
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
> ---
> arm/gic.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> arm/unittests.cfg | 6 ++++
> lib/arm/asm/gic.h | 2 ++
> 3 files changed, 107 insertions(+)
>
> diff --git a/arm/gic.c b/arm/gic.c
> index 638b8b1..ba2585b 100644
> --- a/arm/gic.c
> +++ b/arm/gic.c
> @@ -3,6 +3,7 @@
> *
> * GICv2
> * + test sending/receiving IPIs
> + * + MMIO access tests
> * GICv3
> * + test sending/receiving IPIs
> *
> @@ -274,6 +275,98 @@ static struct gic gicv3 = {
> },
> };
>
> +static bool test_ro_pattern_32(void *address, u32 pattern, u32 orig)
> +{
> + u32 reg;
> +
> + writel(pattern, address);
> + reg = readl(address);
> +
> + if (reg != orig)
> + writel(orig, address);
> +
> + return reg == orig;
> +}
> +
> +static bool test_readonly_32(void *address, bool razwi)
> +{
> + u32 orig, pattern;
> +
> + orig = readl(address);
> + if (razwi && orig)
> + return false;
> +
> + pattern = 0xffffffff;
> + if (orig != pattern) {
> + if (!test_ro_pattern_32(address, pattern, orig))
> + return false;
> + }
> +
> + pattern = 0xa5a55a5a;
> + if (orig != pattern) {
> + if (!test_ro_pattern_32(address, pattern, orig))
> + return false;
> + }
> +
> + pattern = 0;
> + if (orig != pattern) {
> + if (!test_ro_pattern_32(address, pattern, orig))
> + return false;
> + }
> +
> + return true;
> +}
> +
> +static bool test_typer_v2(uint32_t reg)
> +{
> + int nr_gic_cpus = ((reg >> 5) & 0x7) + 1;
> +
> + report("all %d CPUs have interrupts", nr_cpus == nr_gic_cpus,
> + nr_gic_cpus);
> +
> + return true;
This test function can be a void.
> +}
> +
> +static int gic_test_mmio(int gic_version)
> +{
> + u32 reg;
> + int nr_irqs;
> + void *gic_dist_base, *idreg;
> +
> + switch(gic_version) {
> + case 0x2:
> + gic_dist_base = gicv2_dist_base();
> + idreg = gic_dist_base + 0xfe8;
I see below you introduce GICD_ICPIDR2, so I guess you can use it here.
> + break;
> + case 0x3:
> + report_abort("GICv3 MMIO tests NYI");
> + return -1;
can't reach this return
> + default:
> + report_abort("GIC version %d not supported", gic_version);
> + return 0;
can't reach this return
> + }
> +
> + reg = readl(gic_dist_base + GICD_TYPER);
> + nr_irqs = 32 * ((reg & 0x1f) + 1);
Any reason to avoid using GICD_TYPER_IRQS() here?
> + report("number of implemented SPIs: %d", 1, nr_irqs - 32);
We usually just use printf for informational output (but we should
probably add a 'report_info' in order to keep the prefixes. I can
do that now.) Anyway, please s/1/true
> +
> + test_typer_v2(reg);
> +
> + report("IIDR: 0x%x", 1, readl(gic_dist_base + GICD_IIDR));
> +
> + report("GICD_TYPER is read-only",
> + test_readonly_32(gic_dist_base + GICD_TYPER, false));
> + report("GICD_IIDR is read-only",
> + test_readonly_32(gic_dist_base + GICD_IIDR, false));
> +
> + reg = readl(idreg);
> + report("ICPIDR2 is read-only (0x%x)",
> + test_readonly_32(idreg, false),
> + reg);
> +
> + return 0;
You may want %08x for all your register printing.
Since you either abort or always return success, then this function can be
a void.
> +}
> +
> int main(int argc, char **argv)
> {
> char pfx[8];
> @@ -332,6 +425,12 @@ int main(int argc, char **argv)
> }
> ipi_test();
>
> + } else if (!strcmp(argv[1], "mmio")) {
> + report_prefix_push(argv[1]);
> +
> + gic_test_mmio(gic_version());
Any reason to pass gic_version() here instead of just using it
in gic_test_mmio?
> +
> + report_prefix_pop();
> } else {
> report_abort("Unknown subtest '%s'", argv[1]);
> }
> diff --git a/arm/unittests.cfg b/arm/unittests.cfg
> index c7392c7..0162e5a 100644
> --- a/arm/unittests.cfg
> +++ b/arm/unittests.cfg
> @@ -67,6 +67,12 @@ smp = $((($MAX_SMP < 8)?$MAX_SMP:8))
> extra_params = -machine gic-version=2 -append 'ipi'
> groups = gic
>
> +[gicv2-mmio]
> +file = gic.flat
> +smp = $((($MAX_SMP < 8)?$MAX_SMP:8))
> +extra_params = -machine gic-version=2 -append 'mmio'
> +groups = gic
> +
> [gicv3-ipi]
> file = gic.flat
> smp = $MAX_SMP
> diff --git a/lib/arm/asm/gic.h b/lib/arm/asm/gic.h
> index c2267b6..cef748d 100644
> --- a/lib/arm/asm/gic.h
> +++ b/lib/arm/asm/gic.h
> @@ -10,10 +10,12 @@
> /* Distributor registers */
> #define GICD_CTLR 0x0000
> #define GICD_TYPER 0x0004
> +#define GICD_IIDR 0x0008
> #define GICD_IGROUPR 0x0080
> #define GICD_ISENABLER 0x0100
> #define GICD_IPRIORITYR 0x0400
> #define GICD_SGIR 0x0f00
> +#define GICD_ICPIDR2 0x0fe8
>
> #define GICD_TYPER_IRQS(typer) ((((typer) & 0x1f) + 1) * 32)
> #define GICD_INT_EN_SET_SGI 0x0000ffff
> --
> 2.9.0
>
>
Thanks,
drew
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