On Thu, 25 Feb 2016 22:19:13 +0100
Thomas Huth <thuth@xxxxxxxxxx> wrote:
> Introduce a test for sPAPR hypercalls, starting with the two
> hypercalls H_SET_SPRG0 and H_PAGE_INIT.
>
> Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
> ---
> The patch has to be applied on top of Andrew Jones' ppc64 patch
> series. You also need the latest QEMU development version since
> the hypercalls have only been added recently.
>
> lib/powerpc/asm/hcall.h | 3 +
> powerpc/Makefile.common | 5 +-
> powerpc/spapr_hcall.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++++
> powerpc/unittests.cfg | 3 +
> 4 files changed, 154 insertions(+), 1 deletion(-)
> create mode 100644 powerpc/spapr_hcall.c
>
> diff --git a/lib/powerpc/asm/hcall.h b/lib/powerpc/asm/hcall.h
> index 75eac45..3fe8227 100644
> --- a/lib/powerpc/asm/hcall.h
> +++ b/lib/powerpc/asm/hcall.h
> @@ -11,8 +11,11 @@
>
> #define H_SUCCESS 0
> #define H_HARDWARE -1
> +#define H_PARAMETER -4
>
> +#define H_SET_SPRG0 0x24
> #define H_SET_DABR 0x28
> +#define H_PAGE_INIT 0x2c
> #define H_PUT_TERM_CHAR 0x58
>
> #ifndef __ASSEMBLY__
> diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
> index 3a03ab6..6c0f47c 100644
> --- a/powerpc/Makefile.common
> +++ b/powerpc/Makefile.common
> @@ -9,7 +9,8 @@ ifeq ($(LOADADDR),)
> endif
>
> tests-common = \
> - $(TEST_DIR)/selftest.elf
> + $(TEST_DIR)/selftest.elf \
> + $(TEST_DIR)/spapr_hcall.elf
>
> all: $(TEST_DIR)/boot_rom.bin test_cases
>
> @@ -69,3 +70,5 @@ generated_files = $(asm-offsets)
> test_cases: $(generated_files) $(tests-common) $(tests)
>
> $(TEST_DIR)/selftest.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/selftest.o
> +
> +$(TEST_DIR)/spapr_hcall.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/spapr_hcall.o
> diff --git a/powerpc/spapr_hcall.c b/powerpc/spapr_hcall.c
> new file mode 100644
> index 0000000..886217d
> --- /dev/null
> +++ b/powerpc/spapr_hcall.c
> @@ -0,0 +1,144 @@
> +/*
> + * Test sPAPR hypervisor calls (aka. h-calls)
> + *
> + * Copyright 2016 Thomas Huth, Red Hat Inc.
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2.
> + */
> +#include <libcflat.h>
> +#include <util.h>
> +#include <alloc.h>
> +#include <asm/hcall.h>
> +
> +#define PAGE_SIZE 4096
> +
> +#define H_ZERO_PAGE (1 << (63-48))
> +#define H_COPY_PAGE (1 << (63-49))
> +
> +#define mfspr(nr) ({ \
> + u64 ret; \
> + asm volatile("mfspr %0,%1" : "=r"(ret) : "i"(nr)); \
> + ret; \
> +})
> +
> +#define SPR_SPRG0 0x110
> +
> +static u64 h_set_sprg0(u64 new_sprg0)
> +{
> + unsigned long in[8], out[8];
> +
> + in[0] = new_sprg0;
> +
> + return hcall(H_SET_SPRG0, in, out);
> +}
> +
> +/**
> + * Test the H_SET_SPRG0 h-call by setting some values and
> + * checking whether the SPRG0 register contains the correct
> + * values afterwards
> + */
> +static void test_h_set_sprg0(int argc, char **argv)
> +{
> + u64 sprg0, sprg0_orig;
> + int rc;
> +
> + if (argc > 1)
> + report_abort("Unsupported argument: '%s'", argv[1]);
> +
> + sprg0_orig = mfspr(SPR_SPRG0);
> +
> + rc = h_set_sprg0(0xcafebabedeadbeefULL);
> + sprg0 = mfspr(SPR_SPRG0);
> + report("sprg0 = 0xcafebabedeadbeef",
> + rc == H_SUCCESS && sprg0 == 0xcafebabedeadbeefULL);
> +
> + rc = h_set_sprg0(0xaaaaaaaa55555555ULL);
> + sprg0 = mfspr(SPR_SPRG0);
> + report("sprg0 = 0xaaaaaaaa55555555",
> + rc == H_SUCCESS && sprg0 == 0xaaaaaaaa55555555ULL);
> +
> + rc = h_set_sprg0(sprg0_orig);
> + sprg0 = mfspr(SPR_SPRG0);
> + report("sprg0 = 0x%llx",
> + rc == H_SUCCESS && sprg0 == sprg0_orig, sprg0_orig);
> +}
> +
> +static u64 h_page_init(u64 flags, void *destination, void *source)
> +{
> + unsigned long in[8], out[8];
> +
> + in[0] = flags;
> + in[1] = (unsigned long)destination;
> + in[2] = (unsigned long)source;
> +
> + return hcall(H_PAGE_INIT, in, out);
> +}
> +
> +/**
> + * Test the H_PAGE_INIT h-call by using it to clear and to
> + * copy a page, and by checking for the correct values in
> + * the destination page afterwards
> + */
> +static void test_h_page_init(int argc, char **argv)
> +{
> + u8 *dst, *src;
> + int rc;
> +
> + if (argc > 1)
> + report_abort("Unsupported argument: '%s'", argv[1]);
> +
> + dst = memalign(PAGE_SIZE, PAGE_SIZE);
> + src = memalign(PAGE_SIZE, PAGE_SIZE);
> + if (!dst || !src)
> + report_abort("Failed to alloc memory");
> +
> + memset(dst, 0xaa, PAGE_SIZE);
> + rc = h_page_init(H_ZERO_PAGE, dst, src);
> + report("h_zero_page", rc == H_SUCCESS && *(u64*)dst == 0);
> +
> + *(u64*)src = 0xbeefc0dedeadcafeULL;
> + rc = h_page_init(H_COPY_PAGE, dst, src);
> + report("h_copy_page",
> + rc == H_SUCCESS && *(u64*)dst == 0xbeefc0dedeadcafeULL);
> +
> + *(u64*)src = 0x9abcdef012345678ULL;
> + rc = h_page_init(H_COPY_PAGE|H_ZERO_PAGE, dst, src);
> + report("h_copy_page+h_zero_page",
> + rc == H_SUCCESS && *(u64*)dst == 0x9abcdef012345678ULL);
> +
> + rc = h_page_init(H_ZERO_PAGE, dst + 0x123, src);
> + report("h_zero_page unaligned dst", rc == H_PARAMETER);
> +
> + rc = h_page_init(H_COPY_PAGE, dst, src + 0x123);
> + report("h_copy_page unaligned src", rc == H_PARAMETER);
> +}
> +
> +struct {
> + const char *name;
> + void (*func)(int argc, char **argv);
> +} hctests[] = {
> + { "h_set_sprg0", test_h_set_sprg0 },
> + { "h_page_init", test_h_page_init },
> + { NULL, NULL }
> +};
> +
> +int main(int argc, char **argv)
> +{
> + int all = 0;
> + int i;
> +
> + report_prefix_push("hypercall");
> +
> + if (!argc || (argc == 1 && !strcmp(argv[0], "all")))
> + all = 1;
> +
> + for (i = 0; hctests[i].name != NULL; i++) {
> + report_prefix_push(hctests[i].name);
> + if (all || strcmp(argv[0], hctests[i].name) == 0) {
> + hctests[i].func(argc, argv);
> + }
> + report_prefix_pop();
> + }
> +
> + return report_summary();
> +}
> diff --git a/powerpc/unittests.cfg b/powerpc/unittests.cfg
> index 60f9be8..d858436 100644
> --- a/powerpc/unittests.cfg
> +++ b/powerpc/unittests.cfg
> @@ -28,3 +28,6 @@ file = selftest.elf
> smp = 2
> extra_params = -m 256 -append 'setup smp=2 mem=256'
> groups = selftest
> +
> +[spapr_hcall]
> +file = spapr_hcall.elf
> --
> 1.8.3.1
>
--
David Gibson <dgibson@xxxxxxxxxx>
Senior Software Engineer, Virtualization, Red Hat
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