Re: [PATCHv2] Add async page fault test

[Igor Mammedov <imammedo@xxxxxxxxxx>]

On 05/09/2012 12:33 PM, Gleb Natapov wrote:
> The test checks that when hypervisor prefaults swapped in page it does
> not generates spurious #PFs in case page was unmapped while it was
> swapped out.
>
> diff --git a/config-x86-common.mak b/config-x86-common.mak
> index c8fbda7..6976f78 100644
> --- a/config-x86-common.mak
> +++ b/config-x86-common.mak
> @@ -34,7 +34,7 @@ tests-common = $(TEST_DIR)/vmexit.flat $(TEST_DIR)/tsc.flat \
>                  $(TEST_DIR)/realmode.flat $(TEST_DIR)/msr.flat \
>                  $(TEST_DIR)/hypercall.flat $(TEST_DIR)/sieve.flat \
>                  $(TEST_DIR)/kvmclock_test.flat  $(TEST_DIR)/eventinj.flat \
> -               $(TEST_DIR)/s3.flat $(TEST_DIR)/pmu.flat
> +               $(TEST_DIR)/s3.flat $(TEST_DIR)/pmu.flat $(TEST_DIR)/asyncpf.flat
>
>   ifdef API
>   tests-common += api/api-sample
> @@ -90,6 +90,8 @@ $(TEST_DIR)/s3.elf: $(cstart.o) $(TEST_DIR)/s3.o
>
>   $(TEST_DIR)/pmu.elf: $(cstart.o) $(TEST_DIR)/pmu.o
>
> +$(TEST_DIR)/asyncpf.elf: $(cstart.o) $(TEST_DIR)/asyncpf.o
> +
>   arch_clean:
>   	$(RM) $(TEST_DIR)/*.o $(TEST_DIR)/*.flat $(TEST_DIR)/*.elf \
>   	$(TEST_DIR)/.*.d $(TEST_DIR)/lib/.*.d $(TEST_DIR)/lib/*.o
> diff --git a/lib/x86/processor.h b/lib/x86/processor.h
> index c7e1afb..e46d8d0 100644
> --- a/lib/x86/processor.h
> +++ b/lib/x86/processor.h
> @@ -302,4 +302,9 @@ static inline void invlpg(void *va)
>   {
>   	asm volatile("invlpg (%0)" ::"r" (va) : "memory");
>   }
> +
> +static inline void safe_halt(void)
> +{
> +	asm volatile("sti; hlt");
> +}
>   #endif
> diff --git a/lib/x86/vm.c b/lib/x86/vm.c
> index 550ec9b..71b70fd 100644
> --- a/lib/x86/vm.c
> +++ b/lib/x86/vm.c
> @@ -219,6 +219,11 @@ void *vmalloc(unsigned long size)
>       return mem;
>   }
>
> +uint64_t virt_to_phys_cr3(void *mem)
> +{
> +    return (get_pte(phys_to_virt(read_cr3()), mem)&  PTE_ADDR) + ((ulong)mem&  (PAGE_SIZE - 1));
> +}
> +
>   void vfree(void *mem)
>   {
>       unsigned long size = ((unsigned long *)mem)[-1];
> diff --git a/lib/x86/vm.h b/lib/x86/vm.h
> index 71ab4a8..3473f8d 100644
> --- a/lib/x86/vm.h
> +++ b/lib/x86/vm.h
> @@ -22,6 +22,7 @@ void vfree(void *mem);
>   void *vmap(unsigned long long phys, unsigned long size);
>   void *alloc_vpage(void);
>   void *alloc_vpages(ulong nr);
> +uint64_t virt_to_phys_cr3(void *mem);
>
>   void install_pte(unsigned long *cr3,
>                           int pte_level,
> diff --git a/x86/asyncpf.c b/x86/asyncpf.c
> new file mode 100644
> index 0000000..62c0455
> --- /dev/null
> +++ b/x86/asyncpf.c
> @@ -0,0 +1,113 @@
> +/*
> + * Async PF test. For the test to actually do anywathing it ineeds to be started
                                                 ^^^^^^^^^^^^^^^^^^^^ typo?


--
-----
 Igor
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