From: James Hogan <james.hogan@imgtec.com>
To: linux-mips@linux-mips.org
Cc: David Daney <ddaney@caviumnetworks.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Gleb Natapov <gleb@kernel.org>,
kvm@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
David Daney <david.daney@cavium.com>,
Sanjay Lal <sanjayl@kymasys.com>
Subject: Re: [PATCH 04/21] MIPS: KVM: Fix CP0_EBASE KVM register id
Date: Fri, 25 Apr 2014 20:22:40 +0100 [thread overview]
Message-ID: <6139466.gSWQB3IZPa@radagast> (raw)
In-Reply-To: <535A8F22.4090402@caviumnetworks.com>
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Hi David,
On Friday 25 April 2014 09:36:50 David Daney wrote:
> On 04/25/2014 08:19 AM, James Hogan wrote:
> > -#define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1)
> > +#define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_32(15, 1)
>
> According to:
>
> MIPS® Architecture Reference Manual
> Volume III: The MIPS64® and
> microMIPS64TM Privileged Resource
> Architecture
>
> Document Number: MD00089
> Revision 5.02
> April 30, 2013
>
> In section 9.39 EBase Register (CP0 Register 15, Select 1), we see that
> EBase can be either 32-bits or 64-bits wide.
>
> I would recommend leaving this as a 64-bit wide register, so that CPU
> implementations with the wider EBase can be supported.
Yes, you're quite right. I should have checked that one for carefully (I did
think it was a bit odd for it to be 32bit on MIPS64). I'll drop this patch.
Thanks
James
>
> Alternately, probe for the width and use the appropriate 32-bit or
> 64-bit to more closely reflect reality.
>
> > #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0)
> > #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1)
> > #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2)
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next prev parent reply other threads:[~2014-04-25 19:22 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-25 15:19 [PATCH 00/21] MIPS: KVM: Fixes and guest timer rewrite James Hogan
2014-04-25 15:19 ` [PATCH 01/21] MIPS: KVM: Allocate at least 16KB for exception handlers James Hogan
2014-04-25 15:19 ` [PATCH 02/21] MIPS: KVM: Use local_flush_icache_range to fix RI on XBurst James Hogan
2014-04-25 15:19 ` [PATCH 03/21] MIPS: KVM: Use tlb_write_random James Hogan
2014-04-25 15:19 ` [PATCH 04/21] MIPS: KVM: Fix CP0_EBASE KVM register id James Hogan
2014-04-25 16:36 ` David Daney
2014-04-25 19:22 ` James Hogan [this message]
2014-04-25 15:19 ` [PATCH 05/21] MIPS: KVM: Add CP0_EPC KVM register access James Hogan
2014-04-25 16:44 ` David Daney
2014-04-25 20:29 ` James Hogan
2014-04-25 21:45 ` David Daney
2014-04-25 15:19 ` [PATCH 06/21] MIPS: KVM: Move KVM_{GET,SET}_ONE_REG definitions into kvm_host.h James Hogan
2014-04-25 15:19 ` [PATCH 07/21] MIPS: KVM: Add CP0_Count/Compare KVM register access James Hogan
2014-04-25 15:19 ` [PATCH 08/21] MIPS: KVM: Deliver guest interrupts after local_irq_disable() James Hogan
2014-04-25 15:19 ` [PATCH 09/21] MIPS: KVM: Fix timer race modifying guest CP0_Cause James Hogan
2014-04-25 16:55 ` David Daney
2014-04-25 20:42 ` James Hogan
2014-04-25 15:19 ` [PATCH 10/21] MIPS: KVM: Migrate hrtimer to follow VCPU James Hogan
2014-04-25 15:19 ` [PATCH 11/21] MIPS: KVM: Rewrite count/compare timer emulation James Hogan
2014-04-25 17:00 ` David Daney
2014-04-25 21:05 ` James Hogan
2014-04-25 15:19 ` [PATCH 12/21] MIPS: KVM: Override guest kernel timer frequency directly James Hogan
2014-04-25 15:19 ` [PATCH 13/21] MIPS: KVM: Add master disable count interface James Hogan
2014-04-25 15:19 ` [PATCH 14/21] MIPS: KVM: Add nanosecond count bias KVM register James Hogan
2014-04-25 17:27 ` David Daney
2014-04-25 22:34 ` James Hogan
2014-04-26 9:37 ` Paolo Bonzini
2014-05-28 14:21 ` James Hogan
2014-05-28 16:24 ` Paolo Bonzini
2014-04-28 12:01 ` Paolo Bonzini
2014-04-28 15:17 ` James Hogan
2014-04-28 15:42 ` Paolo Bonzini
2014-04-25 15:19 ` [PATCH 15/21] MIPS: KVM: Add count frequency " James Hogan
2014-04-25 15:19 ` [PATCH 16/21] MIPS: KVM: Make kvm_mips_comparecount_{func,wakeup} static James Hogan
2014-04-25 15:20 ` [PATCH 17/21] MIPS: KVM: Whitespace fixes in kvm_mips_callbacks James Hogan
2014-04-25 15:20 ` [PATCH 18/21] MIPS: KVM: Fix kvm_debug bit-rottage James Hogan
2014-04-25 15:20 ` [PATCH 19/21] MIPS: KVM: Remove ifdef DEBUG around kvm_debug James Hogan
2014-04-25 15:20 ` [PATCH 20/21] MIPS: KVM: Quieten kvm_info() logging James Hogan
2014-04-25 15:20 ` [PATCH 21/21] MIPS: KVM: Remove redundant NULL checks before kfree() James Hogan
2014-04-28 12:02 ` [PATCH 00/21] MIPS: KVM: Fixes and guest timer rewrite Paolo Bonzini
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