| Message ID | 20250417-kvm-arm64-sme-v5-6-f469a2d5f574@kernel.org |
|---|---|
| State | New |
| Headers | show
Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7031B1BD03F; Thu, 17 Apr 2025 00:26:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744849567; cv=none; b=mxrBtZqGdb/A8hNYaMcwXc/c9EhdqBtjzZ6QfP8f6vzKQfaPCaqhiV3akP9r0FVewIw9MGSZ8Bn9ajQzzAjf3s/oRavAhuypfI/dYCsFvMH/ieqzrXBBMXabfTny2lqlpiYdz2U8AQsOm8PgSVI6c+8Z8mzOzmkhIWKjP6jvfsY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744849567; c=relaxed/simple; bh=LDt1xNEXDV4dCIkz7nCmkUUILCzxDoXGLDJ0dFTAhvY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PJOEEz/H/I5apcWTkPCTQpKRMcqEIkWsS2iRDNvuHitqDVbsLTWXWQaQwiOW7nt5nvjtyPLy/d32anfEGZQmALg3DY8YmgRGcgMutgBrspZaBUIwl4MWZmlcrW4c66AD+t67LDgKSOFAfq8/otyc99KRdlZ+Y7LLczDCUUEVuSM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MdkO4f4J; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MdkO4f4J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1515FC4CEEC; Thu, 17 Apr 2025 00:26:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744849567; bh=LDt1xNEXDV4dCIkz7nCmkUUILCzxDoXGLDJ0dFTAhvY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=MdkO4f4JPRZABY1VGe30ZeGWmuZSaFtFjbPoiZ2JKwQKtrVsYYf+i/22bM/C+txQ3 VSO+h2w4M6PFbTJ4jJuGtA7NKmb8GQRy7fxoJvXqI8F5gsZeaih/Epir+BBRnVNxBo Hp6hUzdsIkOFIYJJjEeNVg0Ql1sx2Oy53Ymcnb6a6tGeil1b4Pi1WKRP/FZ4z5qFjp 7pPdS6TOxmVCSVTUHyU5tp+Ms+5+l1+metEEhiXl3x0QMVo21vdWGqnJXgEGOtZg0d h1BI2SPu6XavqVmm4LMiapysyCFBTz7B07OxOsVm+98XmHHC0kdhlDlBI4XpxPHEa9 dllqrRyHfmcCg== From: Mark Brown <broonie@kernel.org> Date: Thu, 17 Apr 2025 01:25:10 +0100 Subject: [PATCH v5 06/28] KVM: arm64: Pay attention to FFR parameter in SVE save and load Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: <linux-kselftest.vger.kernel.org> List-Subscribe: <mailto:linux-kselftest+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-kselftest+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250417-kvm-arm64-sme-v5-6-f469a2d5f574@kernel.org> References: <20250417-kvm-arm64-sme-v5-0-f469a2d5f574@kernel.org> In-Reply-To: <20250417-kvm-arm64-sme-v5-0-f469a2d5f574@kernel.org> To: Marc Zyngier <maz@kernel.org>, Oliver Upton <oliver.upton@linux.dev>, Joey Gouly <joey.gouly@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Will Deacon <will@kernel.org>, Paolo Bonzini <pbonzini@redhat.com>, Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org> Cc: Dave Martin <Dave.Martin@arm.com>, Fuad Tabba <tabba@google.com>, Mark Rutland <mark.rutland@arm.com>, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org> X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1028; i=broonie@kernel.org; h=from:subject:message-id; bh=LDt1xNEXDV4dCIkz7nCmkUUILCzxDoXGLDJ0dFTAhvY=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBoAEpzpbQUMEswprMpZyLy/JHBOf6XVtUUczmdbGV3 75K2OBWJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCaABKcwAKCRAk1otyXVSH0HsWB/ 4sQSXEfCj864idBPTgxT0QVL16QLKlb2tYjFR+g2STcCPnwZtZV1LFwSJbC+OJ0RtkpxlsRUsy5QJJ WFPpm0J4Sg7vjD8aAwkFrjupW6IXioTIpwT6iNqrgVv0t5lhHq3QaUTweKPMNmhngcGpVQH7Tv0xKz CM3CmFatHvmNWXBNDUCzW3RfToFWgv6sydXRsYGZ4pXT2SPKc37OCJH0gKrmd/5pnCPhIQfFwzhDka 7wGg10+QjYKhwRxgJFm0McV6OSvvX2EegeLpZ3m8rJqinM817Vh56PEVx8wjGXJot2vVqsPOckFYjU MGfk8dfjxwzkIRO5X1aN0LPGTEUO5v X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB |
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KVM: arm64: Implement support for SME
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diff --git a/arch/arm64/kvm/hyp/fpsimd.S b/arch/arm64/kvm/hyp/fpsimd.S index e950875e31ce..6e16cbfc5df2 100644 --- a/arch/arm64/kvm/hyp/fpsimd.S +++ b/arch/arm64/kvm/hyp/fpsimd.S @@ -21,13 +21,11 @@ SYM_FUNC_START(__fpsimd_restore_state) SYM_FUNC_END(__fpsimd_restore_state) SYM_FUNC_START(__sve_restore_state) - mov x2, #1 sve_load 0, x1, x2, 3 ret SYM_FUNC_END(__sve_restore_state) SYM_FUNC_START(__sve_save_state) - mov x2, #1 sve_save 0, x1, x2, 3 ret SYM_FUNC_END(__sve_save_state)
The hypervisor copies of the SVE save and load functions are prototyped with third arguments specifying FFR should be accessed but the assembly functions overwrite whatever is supplied to unconditionally access FFR. Remove this and use the supplied parameter. This has no effect currently since FFR is always present for SVE but will be important for SME. Signed-off-by: Mark Brown <broonie@kernel.org> --- arch/arm64/kvm/hyp/fpsimd.S | 2 -- 1 file changed, 2 deletions(-)