[kvmarm] [PATCH 04/29] arm64: KVM: system register definitions for 64bit guests
From: Alexander Graf <hidden>
Date: 2013-03-07 10:33:12
Also in:
kvm
On 05.03.2013, at 04:47, Marc Zyngier wrote:
quoted hunk ↗ jump to hunk
Define the saved/restored registers for 64bit guests. Signed-off-by: Marc Zyngier <redacted> --- arch/arm64/include/asm/kvm_asm.h | 68 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 arch/arm64/include/asm/kvm_asm.hdiff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h new file mode 100644 index 0000000..851fee5 --- /dev/null +++ b/arch/arm64/include/asm/kvm_asm.h@@ -0,0 +1,68 @@ +/* + * Copyright (C) 2012 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __ARM_KVM_ASM_H__ +#define __ARM_KVM_ASM_H__ + +/* + * 0 is reserved as an invalid value. + * Order *must* be kept in sync with the hyp switch code. + */ +#define MPIDR_EL1 1 /* MultiProcessor Affinity Register */ +#define CSSELR_EL1 2 /* Cache Size Selection Register */ +#define SCTLR_EL1 3 /* System Control Register */ +#define ACTLR_EL1 4 /* Auxilliary Control Register */ +#define CPACR_EL1 5 /* Coprocessor Access Control */ +#define TTBR0_EL1 6 /* Translation Table Base Register 0 */ +#define TTBR1_EL1 7 /* Translation Table Base Register 1 */ +#define TCR_EL1 8 /* Translation Control Register */ +#define ESR_EL1 9 /* Exception Syndrome Register */ +#define AFSR0_EL1 10 /* Auxilary Fault Status Register 0 */ +#define AFSR1_EL1 11 /* Auxilary Fault Status Register 1 */ +#define FAR_EL1 12 /* Fault Address Register */ +#define MAIR_EL1 13 /* Memory Attribute Indirection Register */ +#define VBAR_EL1 14 /* Vector Base Address Register */ +#define CONTEXTIDR_EL1 15 /* Context ID Register */ +#define TPIDR_EL0 16 /* Thread ID, User R/W */ +#define TPIDRRO_EL0 17 /* Thread ID, User R/O */ +#define TPIDR_EL1 18 /* Thread ID, Privileged */ +#define AMAIR_EL1 19 /* Aux Memory Attribute Indirection Register */ +#define CNTKCTL_EL1 20 /* Timer Control Register (EL1) */ +#define NR_SYS_REGS 21
These are internal representations of the system registers. Keeping everything strictly linear is quite cumbersome, why not let the compiler do this for you?
enum kvm_sysreg_id {
MPIDR_EL1 = 1,
...
NR_SYS_REGS
}
That way gcc automatically counts the IDs up for you. You eliminate a potential source of breakage (duplicate IDs) and the code is even easier to read ;).
Alex