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>,
"Alex Bennée" <alex.bennee@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH v3 23/24] KVM: Documentation: Document arm64 core registers in detail
Date: Tue, 11 Dec 2018 23:29:00 +0000 [thread overview]
Message-ID: <1544570941-7377-24-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1544570941-7377-1-git-send-email-Dave.Martin@arm.com>
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 <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 cd209f7..5f3c525 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2082,6 +2082,30 @@ 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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next prev parent reply other threads:[~2018-12-11 23:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-11 23:28 [RFC PATCH v3 00/24] KVM: arm64: SVE guest support Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 01/24] arm64: fpsimd: Always set TIF_FOREIGN_FPSTATE on task state flush Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 02/24] KVM: arm64: Delete orphaned declaration for __fpsimd_enabled() Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 03/24] KVM: arm64: Refactor kvm_arm_num_regs() for easier maintenance Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 04/24] KVM: arm64: Add missing #include of <linux/bitmap.h> to kvm_host.h Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 05/24] arm64/sve: Check SVE virtualisability Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 06/24] arm64/sve: Clarify role of the VQ map maintenance functions Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 07/24] arm64/sve: Enable SVE state tracking for non-task contexts Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 08/24] KVM: arm64: Add a vcpu flag to control SVE visibility for the guest Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 09/24] KVM: arm64: Propagate vcpu into read_id_reg() Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 10/24] KVM: arm64: Extend reset_unknown() to handle mixed RES0/UNKNOWN registers Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 11/24] KVM: arm64: Support runtime sysreg filtering for KVM_GET_REG_LIST Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 12/24] KVM: arm64/sve: System register context switch and access support Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 13/24] KVM: arm64/sve: Context switch the SVE registers Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 14/24] KVM: Allow 2048-bit register access via ioctl interface Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 15/24] KVM: arm64: Reject ioctl access to FPSIMD V-regs on SVE vcpus Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 16/24] KVM: arm64/sve: Add SVE support to register access ioctl interface Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 17/24] KVM: arm64: Enumerate SVE register indices for KVM_GET_REG_LIST Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 18/24] arm64/sve: In-kernel vector length availability query interface Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 19/24] KVM: arm: Move detection of invalid VM type bits to generic code Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 20/24] KVM: arm: Add support for early vcpu configuration ioctls Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 21/24] KVM: arm64/sve: Report and enable SVE API extensions for userspace Dave Martin
2018-12-11 23:28 ` [RFC PATCH v3 22/24] KVM: arm64/sve: allow KVM_ARM_SVE_CONFIG_QUERY on vm fd Dave Martin
2018-12-11 23:29 ` Dave Martin [this message]
2018-12-11 23:29 ` [RFC PATCH v3 24/24] KVM: arm64/sve: Document KVM API extensions for SVE Dave Martin
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