linux-kernel - Re: [PATCH kvm-unit-tests1/2] x86: emulator: additional smsw test-case

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Message-ID: <53959C3B.3010000@redhat.com>
Date:	Mon, 09 Jun 2014 13:36:27 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Nadav Amit <namit@...technion.ac.il>
CC:	gleb@...nel.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH kvm-unit-tests1/2] x86: emulator: additional smsw test-case

Il 06/06/2014 01:56, Nadav Amit ha scritto:
> An additional test case for the emulator was added to test smsw which is
> trapped by the emulator.  The other existing test-cases occur in the guest (at
> least on VMX), since the values are read directly from the CR0 read shadow.
>
> Signed-off-by: Nadav Amit <namit@...technion.ac.il>
> ---
>  x86/emulator.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/x86/emulator.c b/x86/emulator.c
> index 20e3a45..033f246 100644
> --- a/x86/emulator.c
> +++ b/x86/emulator.c
> @@ -336,7 +336,7 @@ void test_incdecnotneg(void *mem)
>      report("lock notb", *mb == vb);
>  }
>
> -void test_smsw(void)
> +void test_smsw(uint64_t *h_mem)
>  {
>  	char mem[16];
>  	unsigned short msw, msw_orig, *pmsw;
> @@ -355,6 +355,12 @@ void test_smsw(void)
>  		if (i != 4 && pmsw[i])
>  			zero = 0;
>  	report("smsw (2)", msw == pmsw[4] && zero);
> +
> +	/* Trigger exit on smsw */
> +	*h_mem = 0x12345678abcdeful;
> +	asm volatile("smsw %0" : "=m"(*h_mem));
> +	report("smsw (3)", msw == (unsigned short)*h_mem &&
> +		(*h_mem & ~0xfffful) == 0x12345678ab0000ul);
>  }
>
>  void test_lmsw(void)
> @@ -998,7 +1004,7 @@ int main()
>
>  	test_cr8();
>
> -	test_smsw();
> +	test_smsw(mem);
>  	test_lmsw();
>  	test_ljmp(mem);
>  	test_stringio();
>

Thanks, applying all after the end of the merge window.

Paolo
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