From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7C7881BEE0 for ; Thu, 17 Aug 2023 22:02:05 +0000 (UTC) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 2971A211F7CB; Thu, 17 Aug 2023 15:01:59 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 2971A211F7CB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1692309719; bh=xTfaCgUQJPWGEahpL4KsizQGwHo2/XGuNwTeht6FUA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nM9xUANynJG/F45czaJZphluOvv5OAcSP6CUhSvsi030gvCFGSeCObngLYFnnMggp 2VZ9qCWDZGw0krnZ59dvlpJjx9bl85rwNxTfZyAh5iryrnky1ivLa76AFG4q4NVYUP TmOIPf/AEoYUMf39le8I9XCqZsPG9YeRuR6ZRZCU= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org Cc: patches@lists.linux.dev, mikelley@microsoft.com, kys@microsoft.com, wei.liu@kernel.org, haiyangz@microsoft.com, decui@microsoft.com, apais@linux.microsoft.com, Tianyu.Lan@microsoft.com, ssengar@linux.microsoft.com, mukeshrathor@microsoft.com, stanislav.kinsburskiy@gmail.com, jinankjain@linux.microsoft.com, vkuznets@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, will@kernel.org, catalin.marinas@arm.com Subject: [PATCH v2 04/15] asm-generic/mshyperv: Introduce hv_recommend_using_aeoi() Date: Thu, 17 Aug 2023 15:01:40 -0700 Message-Id: <1692309711-5573-5-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1692309711-5573-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1692309711-5573-1-git-send-email-nunodasneves@linux.microsoft.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Factor out logic for determining if we should set the auto eoi flag in SINT register. Signed-off-by: Nuno Das Neves Reviewed-by: Wei Liu --- drivers/hv/hv.c | 12 +----------- include/asm-generic/mshyperv.h | 13 +++++++++++++ 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 3ddacdebe886..7929554d32f7 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -212,17 +212,7 @@ void hv_synic_enable_regs(unsigned int cpu) shared_sint.vector = vmbus_interrupt; shared_sint.masked = false; - - /* - * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64), - * it doesn't provide a recommendation flag and AEOI must be disabled. - */ -#ifdef HV_DEPRECATING_AEOI_RECOMMENDED - shared_sint.auto_eoi = - !(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED); -#else - shared_sint.auto_eoi = 0; -#endif + shared_sint.auto_eoi = hv_recommend_using_aeoi(); hv_set_register(HV_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 447e7ebe67ee..90fcbb95f1ee 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -77,6 +77,19 @@ extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); extern u64 hv_do_fast_hypercall8(u16 control, u64 input8); extern bool hv_isolation_type_snp(void); +/* + * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64), + * it doesn't provide a recommendation flag and AEOI must be disabled. + */ +static inline bool hv_recommend_using_aeoi(void) +{ +#ifdef HV_DEPRECATING_AEOI_RECOMMENDED + return !(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED); +#else + return false; +#endif +} + /* Helper functions that provide a consistent pattern for checking Hyper-V hypercall status. */ static inline int hv_result(u64 status) { -- 2.25.1