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Re: [PATCH v3 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
- From: Catalin Marinas <catalin dot marinas at arm dot com>
- To: Dave Martin <Dave dot Martin at arm dot com>
- Cc: linux-arm-kernel at lists dot infradead dot org, linux-arch at vger dot kernel dot org, Okamoto Takayuki <tokamoto at jp dot fujitsu dot com>, libc-alpha at sourceware dot org, Ard Biesheuvel <ard dot biesheuvel at linaro dot org>, Szabolcs Nagy <szabolcs dot nagy at arm dot com>, Will Deacon <will dot deacon at arm dot com>, Richard Sandiford <richard dot sandiford at arm dot com>, Alex Bennée <alex dot bennee at linaro dot org>, kvmarm at lists dot cs dot columbia dot edu
- Date: Thu, 12 Oct 2017 18:13:16 +0100
- Subject: Re: [PATCH v3 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
- Authentication-results: sourceware.org; auth=none
- References: <1507660725-7986-1-git-send-email-Dave.Martin@arm.com> <1507660725-7986-24-git-send-email-Dave.Martin@arm.com>
On Tue, Oct 10, 2017 at 07:38:40PM +0100, Dave P Martin wrote:
> When trapping forbidden attempts by a guest to use SVE, we want the
> guest to see a trap consistent with SVE not being implemented.
>
> This patch injects an undefined instruction exception into the
> guest in response to such an exception.
>
> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>