From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Martin Subject: [RFC PATCH v2 22/23] KVM: Documentation: Document arm64 core registers in detail Date: Fri, 28 Sep 2018 14:39:26 +0100 Message-ID: <1538141967-15375-23-git-send-email-Dave.Martin@arm.com> References: <1538141967-15375-1-git-send-email-Dave.Martin@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 46FA34A230 for ; Fri, 28 Sep 2018 09:41:03 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EOJNxgh5okSR for ; Fri, 28 Sep 2018 09:41:02 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 43EC14A2C7 for ; Fri, 28 Sep 2018 09:40:59 -0400 (EDT) In-Reply-To: <1538141967-15375-1-git-send-email-Dave.Martin@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: kvmarm@lists.cs.columbia.edu Cc: Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org List-Id: kvmarm@lists.cs.columbia.edu Since the the sizes of members the core arm64 registers vary, the list of register encodings that make sense is not a simple linear sequence. To clarify which encodings to use, this patch adds a brief list to the documentation. Signed-off-by: Dave Martin --- Draft only -- encodings not checked yet. --- Documentation/virtual/kvm/api.txt | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 647f941..a58067b 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2037,6 +2037,30 @@ contains elements ranging from 32 to 128 bits. The index is a 32bit value in the kvm_regs structure seen as a 32bit array. 0x60x0 0000 0010 +Specifically: + Encoding Register Bits kvm_regs member +---------------------------------------------------------------- + 0x6030 0000 0010 0000 X0 64 regs.regs[0] + 0x6030 0000 0010 0002 X1 64 regs.regs[1] + ... + 0x6030 0000 0010 003c X30 64 regs.regs[30] + 0x6030 0000 0010 003e SP 64 regs.sp + 0x6030 0000 0010 0040 PC 64 regs.pc + 0x6030 0000 0010 0042 PSTATE 64 regs.pstate + 0x6030 0000 0010 0044 SP_EL1 64 sp_el1 + 0x6030 0000 0010 0046 ELR_EL1 64 elr_el1 + 0x6030 0000 0010 0048 SPSR_EL1 64 spsr[KVM_SPSR_EL1] (alias SPSR_SVC) + 0x6030 0000 0010 004a SPSR_ABT 64 spsr[KVM_SPSR_ABT] + 0x6030 0000 0010 004c SPSR_UND 64 spsr[KVM_SPSR_UND] + 0x6030 0000 0010 004e SPSR_IRQ 64 spsr[KVM_SPSR_IRQ] + 0x6060 0000 0010 0050 SPSR_FIQ 64 spsr[KVM_SPSR_FIQ] + 0x6040 0000 0010 0054 V0 128 fp_regs.vregs[0] + 0x6040 0000 0010 0058 V1 128 fp_regs.vregs[1] + ... + 0x6040 0000 0010 00d0 V31 128 fp_regs.vregs[31] + 0x6020 0000 0010 00d4 FPSR 32 fp_regs.fpsr + 0x6020 0000 0010 00d5 FPCR 32 fp_regs.fpcr + arm64 CCSIDR registers are demultiplexed by CSSELR value: 0x6020 0000 0011 00 -- 2.1.4