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Subject: Re: [RFC PATCH 4/4] KVM: selftests: Add the sync_regs test for s390x
To:     Thomas Huth <thuth@redhat.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Janosch Frank <frankja@linux.ibm.com>, kvm@vger.kernel.org
Cc:     =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        David Hildenbrand <david@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Andrew Jones <drjones@redhat.com>,
        linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
        linux-s390@vger.kernel.org
References: <20190516111253.4494-1-thuth@redhat.com>
 <20190516111253.4494-5-thuth@redhat.com>
From:   Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <3e462f1d-c9c0-ac26-ed59-182fbbf60340@redhat.com>
Date:   Mon, 20 May 2019 13:19:40 +0200
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On 16/05/19 13:12, Thomas Huth wrote:
> +#define VCPU_ID 5
> +
> +static void guest_code(void)
> +{
> +	for (;;) {
> +		asm volatile ("diag 0,0,0x501");
> +		asm volatile ("ahi 11,1");
> +	}

I'd like this to use something like

	register u32 stage = 0 asm("11");
	...
	stage++

instead (yes, it should be fixed in x86 too).

Paolo