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From: Dave Martin <Dave.Martin@arm.com>
To: kvmarm@lists.cs.columbia.edu
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
	"Okamoto Takayuki" <tokamoto@jp.fujitsu.com>,
	"Christoffer Dall" <cdall@kernel.org>,
	"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
	"Marc Zyngier" <marc.zyngier@arm.com>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Will Deacon" <will.deacon@arm.com>,
	"Zhang Lei" <zhang.lei@jp.fujitsu.com>,
	"Julien Grall" <julien.grall@arm.com>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 01/26] KVM: Documentation: Document arm64 core registers in detail
Date: Mon, 18 Feb 2019 19:52:14 +0000	[thread overview]
Message-ID: <1550519559-15915-2-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1550519559-15915-1-git-send-email-Dave.Martin@arm.com>

Since the the sizes of individual members of 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 <Dave.Martin@arm.com>
---
 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 356156f..097b8ba 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2090,6 +2090,30 @@ 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 <index into the kvm_regs struct:16>
 
+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 <csselr:8>
 
-- 
2.1.4


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  reply	other threads:[~2019-02-18 19:54 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-18 19:52 [PATCH v5 00/26] KVM: arm64: SVE guest support Dave Martin
2019-02-18 19:52 ` Dave Martin [this message]
2019-02-21 11:48   ` [PATCH v5 01/26] KVM: Documentation: Document arm64 core registers in detail Julien Grall
2019-02-26 12:05     ` Dave Martin
2019-02-21 11:57   ` Peter Maydell
2019-02-18 19:52 ` [PATCH v5 02/26] arm64: fpsimd: Always set TIF_FOREIGN_FPSTATE on task state flush Dave Martin
2019-02-21 12:39   ` Julien Grall
2019-02-26 12:06     ` Dave Martin
2019-02-26 12:35       ` Julien Grall
2019-02-18 19:52 ` [PATCH v5 03/26] KVM: arm64: Delete orphaned declaration for __fpsimd_enabled() Dave Martin
2019-02-18 19:52 ` [PATCH v5 04/26] KVM: arm64: Refactor kvm_arm_num_regs() for easier maintenance Dave Martin
2019-02-18 19:52 ` [PATCH v5 05/26] KVM: arm64: Add missing #include of <linux/bitmap.h> to kvm_host.h Dave Martin
2019-02-20 15:23   ` Mark Rutland
2019-02-26 12:06     ` Dave Martin
2019-02-26 12:31       ` Mark Rutland
2019-02-26 12:33         ` Dave Martin
2019-02-26 12:40           ` Mark Rutland
2019-02-18 19:52 ` [PATCH v5 06/26] arm64/sve: Check SVE virtualisability Dave Martin
2019-02-20 11:12   ` Julien Thierry
2019-02-26 12:06     ` Dave Martin
2019-03-01 12:39       ` Julien Thierry
2019-03-01 14:44         ` Dave Martin
2019-02-21 13:36   ` Julien Grall
2019-02-26 12:06     ` Dave Martin
2019-02-26 15:43       ` Julien Grall
2019-02-18 19:52 ` [PATCH v5 07/26] arm64/sve: Clarify role of the VQ map maintenance functions Dave Martin
2019-02-20 11:43   ` Julien Thierry
2019-02-26 12:06     ` Dave Martin
2019-02-21 13:46   ` Julien Grall
2019-02-26 12:07     ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 08/26] arm64/sve: Enable SVE state tracking for non-task contexts Dave Martin
2019-02-22 15:26   ` Julien Grall
2019-02-26 12:07     ` Dave Martin
2019-02-26 15:49       ` Julien Grall
2019-02-26 15:58         ` Dave Martin
2019-02-26 15:59           ` Julien Grall
2019-02-26 16:03             ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 09/26] KVM: arm64: Add a vcpu flag to control SVE visibility for the guest Dave Martin
2019-02-18 19:52 ` [PATCH v5 10/26] KVM: arm64: Propagate vcpu into read_id_reg() Dave Martin
2019-02-18 19:52 ` [PATCH v5 11/26] KVM: arm64: Extend reset_unknown() to handle mixed RES0/UNKNOWN registers Dave Martin
2019-02-20 13:33   ` Julien Thierry
2019-02-26 12:07     ` Dave Martin
2019-02-22 16:04   ` Julien Grall
2019-02-18 19:52 ` [PATCH v5 12/26] KVM: arm64: Support runtime sysreg visibility filtering Dave Martin
2019-02-20 14:33   ` Julien Thierry
2019-02-26 12:07     ` Dave Martin
2019-02-20 15:37   ` Mark Rutland
2019-02-26 12:12     ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 13/26] KVM: arm64/sve: System register context switch and access support Dave Martin
2019-02-20 16:48   ` Julien Thierry
2019-02-26 16:32   ` Julien Grall
2019-02-26 17:01     ` Dave Martin
2019-02-27 12:02       ` Julien Grall
2019-02-27 13:50         ` Dave Martin
2019-02-27 14:17           ` Julien Grall
2019-02-27 14:38             ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 14/26] KVM: arm64/sve: Context switch the SVE registers Dave Martin
2019-02-20 16:19   ` Mark Rutland
2019-02-26 12:13     ` Dave Martin
2019-02-20 16:46   ` Julien Thierry
2019-02-26 12:13     ` Dave Martin
2019-02-26 16:56       ` Julien Grall
2019-02-27 13:37         ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 15/26] KVM: Allow 2048-bit register access via ioctl interface Dave Martin
2019-02-18 19:52 ` [PATCH v5 16/26] KVM: arm64: Add missing #include of <linux/string.h> in guest.c Dave Martin
2019-02-18 19:52 ` [PATCH v5 17/26] KVM: arm64: Reject ioctl access to FPSIMD V-regs on SVE vcpus Dave Martin
2019-02-21 12:06   ` Julien Thierry
2019-02-26 12:13     ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 18/26] KVM: arm64/sve: Add SVE support to register access ioctl interface Dave Martin
2019-02-21 15:23   ` Julien Thierry
2019-02-26 12:13     ` Dave Martin
2019-03-01 13:03       ` Julien Thierry
2019-03-01 14:45         ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 19/26] KVM: arm64: Enumerate SVE register indices for KVM_GET_REG_LIST Dave Martin
2019-02-21 16:28   ` Julien Thierry
2019-02-18 19:52 ` [PATCH v5 20/26] arm64/sve: In-kernel vector length availability query interface Dave Martin
2019-02-18 19:52 ` [PATCH v5 21/26] KVM: arm/arm64: Add hook to finalize the vcpu configuration Dave Martin
2019-02-18 19:52 ` [PATCH v5 22/26] KVM: arm64/sve: Add pseudo-register for the guest's vector lengths Dave Martin
2019-02-21 17:48   ` Julien Thierry
2019-02-26 12:13     ` Dave Martin
2019-03-01 13:28       ` Julien Thierry
2019-03-01 14:55         ` Dave Martin
2019-03-07 13:47           ` Marc Zyngier
2019-03-07 15:30             ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 23/26] KVM: arm64/sve: Allow userspace to enable SVE for vcpus Dave Martin
2019-02-22  9:05   ` Julien Thierry
2019-02-26 12:13     ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 24/26] KVM: arm64: Add a capabillity to advertise SVE support Dave Martin
2019-02-22  9:10   ` Julien Thierry
2019-02-26 12:14     ` Dave Martin
2019-02-18 19:52 ` [PATCH v5 25/26] KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG Dave Martin
2019-02-18 19:52 ` [PATCH v5 26/26] KVM: arm64/sve: Document KVM API extensions for SVE Dave Martin
2019-02-20 15:47 ` [PATCH v5 00/26] KVM: arm64: SVE guest support Dave Martin
2019-03-03  2:40 ` Zhang, Lei
2019-03-05  9:47   ` Dave Martin
2019-03-08  7:06     ` Zhang, Lei

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