From: "Suzuki K. Poulose" <Suzuki.Poulose@arm.com>
To: Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Christoffer Dall <christoffer.dall@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v2 20/21] arm64: VHE: Add support for running Linux in EL2 mode
Date: Tue, 26 Jan 2016 14:04:59 +0000 [thread overview]
Message-ID: <56A77D0B.50002@arm.com> (raw)
In-Reply-To: <1453737235-16522-21-git-send-email-marc.zyngier@arm.com>
On 25/01/16 15:53, Marc Zyngier wrote:
> With ARMv8.1 VHE, the architecture is able to (almost) transparently
> run the kernel at EL2, despite being written for EL1.
>
> This patch takes care of the "almost" part, mostly preventing the kernel
> from dropping from EL2 to EL1, and setting up the HYP configuration.
> #ifdef CONFIG_COMPAT
> @@ -521,6 +542,15 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
> /* Stage-2 translation */
> msr vttbr_el2, xzr
>
> + cbz x2, install_el2_stub
Though it is apparent, may be its worth adding a comment here that we don't drop to EL1 here ?
> +
> + setup_vtcr x4, x5
> +
> + mov w20, #BOOT_CPU_MODE_EL2 // This CPU booted in EL2
> + isb
> + ret
> +
> +install_el2_stub:
And a comment here mentioning, install the hyp stub and drops to EL1 ?
> /* Hypervisor stub */
> adrp x0, __hyp_stub_vectors
> add x0, x0, #:lo12:__hyp_stub_vectors
>
Cheers
Suzuki
WARNING: multiple messages have this Message-ID (diff)
From: Suzuki.Poulose@arm.com (Suzuki K. Poulose)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 20/21] arm64: VHE: Add support for running Linux in EL2 mode
Date: Tue, 26 Jan 2016 14:04:59 +0000 [thread overview]
Message-ID: <56A77D0B.50002@arm.com> (raw)
In-Reply-To: <1453737235-16522-21-git-send-email-marc.zyngier@arm.com>
On 25/01/16 15:53, Marc Zyngier wrote:
> With ARMv8.1 VHE, the architecture is able to (almost) transparently
> run the kernel at EL2, despite being written for EL1.
>
> This patch takes care of the "almost" part, mostly preventing the kernel
> from dropping from EL2 to EL1, and setting up the HYP configuration.
> #ifdef CONFIG_COMPAT
> @@ -521,6 +542,15 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
> /* Stage-2 translation */
> msr vttbr_el2, xzr
>
> + cbz x2, install_el2_stub
Though it is apparent, may be its worth adding a comment here that we don't drop to EL1 here ?
> +
> + setup_vtcr x4, x5
> +
> + mov w20, #BOOT_CPU_MODE_EL2 // This CPU booted in EL2
> + isb
> + ret
> +
> +install_el2_stub:
And a comment here mentioning, install the hyp stub and drops to EL1 ?
> /* Hypervisor stub */
> adrp x0, __hyp_stub_vectors
> add x0, x0, #:lo12:__hyp_stub_vectors
>
Cheers
Suzuki
next prev parent reply other threads:[~2016-01-26 14:05 UTC|newest]
Thread overview: 232+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 15:53 [PATCH v2 00/21] arm64: Virtualization Host Extension support Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` [PATCH v2 01/21] arm/arm64: Add new is_kernel_in_hyp_mode predicate Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 02/21] arm64: Allow the arch timer to use the HYP timer Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 12:29 ` Christoffer Dall
2016-02-01 12:29 ` Christoffer Dall
2016-02-01 12:29 ` Christoffer Dall
2016-02-01 13:42 ` Marc Zyngier
2016-02-01 13:42 ` Marc Zyngier
2016-02-01 13:42 ` Marc Zyngier
2016-02-01 15:37 ` Christoffer Dall
2016-02-01 15:37 ` Christoffer Dall
2016-02-01 15:37 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 03/21] arm64: Add ARM64_HAS_VIRT_HOST_EXTN feature Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 04/21] arm64: KVM: Skip HYP setup when already running in HYP Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 05/21] arm64: KVM: VHE: Turn VTCR_EL2 setup into a reusable macro Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:13 ` Christoffer Dall
2016-02-01 13:13 ` Christoffer Dall
2016-02-01 13:13 ` Christoffer Dall
2016-02-01 14:21 ` Marc Zyngier
2016-02-01 14:21 ` Marc Zyngier
2016-02-01 14:21 ` Marc Zyngier
2016-02-01 15:38 ` Christoffer Dall
2016-02-01 15:38 ` Christoffer Dall
2016-02-01 15:38 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 06/21] arm64: KVM: VHE: Patch out use of HVC Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:16 ` Christoffer Dall
2016-02-01 13:16 ` Christoffer Dall
2016-02-01 13:34 ` Marc Zyngier
2016-02-01 13:34 ` Marc Zyngier
2016-02-01 15:36 ` Catalin Marinas
2016-02-01 15:36 ` Catalin Marinas
2016-02-01 15:36 ` Catalin Marinas
2016-02-01 16:20 ` Marc Zyngier
2016-02-01 16:20 ` Marc Zyngier
2016-02-01 16:20 ` Marc Zyngier
2016-02-01 17:08 ` Ard Biesheuvel
2016-02-01 17:08 ` Ard Biesheuvel
2016-02-01 17:08 ` Ard Biesheuvel
2016-02-01 17:28 ` Marc Zyngier
2016-02-01 17:28 ` Marc Zyngier
2016-02-01 17:28 ` Marc Zyngier
2016-02-02 15:42 ` Christoffer Dall
2016-02-02 15:42 ` Christoffer Dall
2016-02-02 15:42 ` Christoffer Dall
2016-02-01 15:39 ` Christoffer Dall
2016-02-01 15:39 ` Christoffer Dall
2016-02-01 15:39 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 07/21] arm64: KVM: VHE: Patch out kern_hyp_va Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:20 ` Christoffer Dall
2016-02-01 13:20 ` Christoffer Dall
2016-02-01 13:20 ` Christoffer Dall
2016-02-01 13:38 ` Marc Zyngier
2016-02-01 13:38 ` Marc Zyngier
2016-02-01 13:38 ` Marc Zyngier
2016-02-01 15:40 ` Christoffer Dall
2016-02-01 15:40 ` Christoffer Dall
2016-02-01 15:40 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 08/21] arm64: KVM: VHE: Introduce unified system register accessors Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:47 ` Christoffer Dall
2016-02-01 13:47 ` Christoffer Dall
2016-02-01 13:47 ` Christoffer Dall
2016-02-01 14:04 ` Marc Zyngier
2016-02-01 14:04 ` Marc Zyngier
2016-02-01 14:04 ` Marc Zyngier
2016-02-01 15:43 ` Christoffer Dall
2016-02-01 15:43 ` Christoffer Dall
2016-02-01 15:43 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 09/21] arm64: KVM: VHE: Differenciate host/guest sysreg save/restore Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 10/21] arm64: KVM: VHE: Split save/restore of sysregs shared between EL1 and EL2 Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:54 ` Christoffer Dall
2016-02-01 13:54 ` Christoffer Dall
2016-02-01 13:54 ` Christoffer Dall
2016-02-02 9:46 ` Marc Zyngier
2016-02-02 9:46 ` Marc Zyngier
2016-02-02 9:46 ` Marc Zyngier
2016-02-02 15:46 ` Christoffer Dall
2016-02-02 15:46 ` Christoffer Dall
2016-02-02 16:19 ` Marc Zyngier
2016-02-02 16:19 ` Marc Zyngier
2016-02-02 16:19 ` Marc Zyngier
2016-02-02 20:07 ` Christoffer Dall
2016-02-02 20:07 ` Christoffer Dall
2016-02-02 20:07 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 11/21] arm64: KVM: VHE: Use unified system register accessors Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 13:59 ` Christoffer Dall
2016-02-01 13:59 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 12/21] arm64: KVM: VHE: Enable minimal sysreg save/restore Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:02 ` Christoffer Dall
2016-02-01 14:02 ` Christoffer Dall
2016-02-01 14:02 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 13/21] arm64: KVM: VHE: Make __fpsimd_enabled VHE aware Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:17 ` Christoffer Dall
2016-02-01 14:17 ` Christoffer Dall
2016-02-01 14:17 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 14/21] arm64: KVM: VHE: Implement VHE activate/deactivate_traps Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:20 ` Christoffer Dall
2016-02-01 14:20 ` Christoffer Dall
2016-02-01 14:20 ` Christoffer Dall
2016-02-02 11:27 ` Marc Zyngier
2016-02-02 11:27 ` Marc Zyngier
2016-01-25 15:53 ` [PATCH v2 15/21] arm64: KVM: VHE: Use unified sysreg accessors for timer Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:23 ` Christoffer Dall
2016-02-01 14:23 ` Christoffer Dall
2016-02-01 14:23 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 16/21] arm64: KVM: VHE: Add fpsimd enabling on guest access Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:24 ` Christoffer Dall
2016-02-01 14:24 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 17/21] arm64: KVM: VHE: Add alternative panic handling Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:26 ` Christoffer Dall
2016-02-01 14:26 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 18/21] arm64: KVM: Introduce hyp_alternate_value helper Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 14:41 ` Christoffer Dall
2016-02-01 14:41 ` Christoffer Dall
2016-02-02 13:42 ` Marc Zyngier
2016-02-02 13:42 ` Marc Zyngier
2016-02-02 15:47 ` Christoffer Dall
2016-02-02 15:47 ` Christoffer Dall
2016-02-02 15:47 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 19/21] arm64: KVM: Move most of the fault decoding to C Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-02-01 15:21 ` Christoffer Dall
2016-02-01 15:21 ` Christoffer Dall
2016-02-01 15:21 ` Christoffer Dall
2016-02-02 14:24 ` Marc Zyngier
2016-02-02 14:24 ` Marc Zyngier
2016-02-02 14:24 ` Marc Zyngier
2016-02-02 15:50 ` Christoffer Dall
2016-02-02 15:50 ` Christoffer Dall
2016-02-02 15:50 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 20/21] arm64: VHE: Add support for running Linux in EL2 mode Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-26 14:04 ` Suzuki K. Poulose [this message]
2016-01-26 14:04 ` Suzuki K. Poulose
2016-01-26 14:30 ` Suzuki K. Poulose
2016-01-26 14:30 ` Suzuki K. Poulose
2016-02-01 15:26 ` Christoffer Dall
2016-02-01 15:26 ` Christoffer Dall
2016-01-25 15:53 ` [PATCH v2 21/21] arm64: Panic when VHE and non VHE CPUs coexist Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-25 15:53 ` Marc Zyngier
2016-01-26 14:25 ` Suzuki K. Poulose
2016-01-26 14:25 ` Suzuki K. Poulose
2016-01-26 14:25 ` Suzuki K. Poulose
2016-01-26 14:34 ` Marc Zyngier
2016-01-26 14:34 ` Marc Zyngier
2016-01-26 14:34 ` Marc Zyngier
2016-02-01 15:36 ` Christoffer Dall
2016-02-01 15:36 ` Christoffer Dall
2016-02-01 15:36 ` Christoffer Dall
2016-02-02 15:32 ` Marc Zyngier
2016-02-02 15:32 ` Marc Zyngier
2016-02-03 8:49 ` Christoffer Dall
2016-02-03 8:49 ` Christoffer Dall
2016-02-03 8:49 ` Christoffer Dall
2016-02-03 17:45 ` Marc Zyngier
2016-02-03 17:45 ` Marc Zyngier
2016-02-03 17:45 ` Marc Zyngier
2016-02-03 19:12 ` Christoffer Dall
2016-02-03 19:12 ` Christoffer Dall
2016-02-03 19:12 ` Christoffer Dall
2016-01-25 16:15 ` [PATCH v2 00/21] arm64: Virtualization Host Extension support Arnd Bergmann
2016-01-25 16:15 ` Arnd Bergmann
2016-01-25 16:15 ` Arnd Bergmann
2016-01-25 16:23 ` Marc Zyngier
2016-01-25 16:23 ` Marc Zyngier
2016-01-25 16:26 ` Arnd Bergmann
2016-01-25 16:26 ` Arnd Bergmann
2016-01-25 16:26 ` Arnd Bergmann
2016-01-25 16:26 ` Will Deacon
2016-01-25 16:26 ` Will Deacon
2016-01-25 16:26 ` Will Deacon
2016-01-25 16:37 ` Marc Zyngier
2016-01-25 16:37 ` Marc Zyngier
2016-01-25 16:37 ` Marc Zyngier
2016-01-25 16:44 ` Will Deacon
2016-01-25 16:44 ` Will Deacon
2016-01-25 19:16 ` Marc Zyngier
2016-01-25 19:16 ` Marc Zyngier
2016-01-25 19:16 ` Marc Zyngier
2016-02-01 16:25 ` Christoffer Dall
2016-02-01 16:25 ` Christoffer Dall
2016-02-01 16:25 ` Christoffer Dall
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