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From: Michal Orzel <michal.orzel@arm.com>
To: xen-devel@lists.xenproject.org
Cc: Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien@xen.org>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
	bertrand.marquis@arm.com
Subject: [PATCH v2 03/10] arm: Modify type of actlr to register_t
Date: Tue, 27 Apr 2021 11:35:39 +0200	[thread overview]
Message-ID: <20210427093546.30703-4-michal.orzel@arm.com> (raw)
In-Reply-To: <20210427093546.30703-1-michal.orzel@arm.com>

AArch64 registers are 64bit whereas AArch32 registers
are 32bit or 64bit. MSR/MRS are expecting 64bit values thus
we should get rid of helpers READ/WRITE_SYSREG32
in favour of using READ/WRITE_SYSREG.
We should also use register_t type when reading sysregs
which can correspond to uint64_t or uint32_t.
Even though many AArch64 registers have upper 32bit reserved
it does not mean that they can't be widen in the future.

Signed-off-by: Michal Orzel <michal.orzel@arm.com>
---
 xen/arch/arm/domain.c        | 2 +-
 xen/include/asm-arm/domain.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 621f518b83..c021a03c61 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -330,7 +330,7 @@ static void schedule_tail(struct vcpu *prev)
 
 static void continue_new_vcpu(struct vcpu *prev)
 {
-    current->arch.actlr = READ_SYSREG32(ACTLR_EL1);
+    current->arch.actlr = READ_SYSREG(ACTLR_EL1);
     processor_vcpu_initialise(current);
 
     schedule_tail(prev);
diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h
index c6b59ee755..2d4f38c669 100644
--- a/xen/include/asm-arm/domain.h
+++ b/xen/include/asm-arm/domain.h
@@ -156,7 +156,7 @@ struct arch_vcpu
 
     /* Control Registers */
     register_t sctlr;
-    uint32_t actlr;
+    register_t actlr;
     uint32_t cpacr;
 
     uint32_t contextidr;
-- 
2.29.0



  parent reply	other threads:[~2021-04-27  9:36 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-27  9:35 [PATCH v2 00/10] Get rid of READ/WRITE_SYSREG32 Michal Orzel
2021-04-27  9:35 ` [PATCH v2 01/10] arm64/vfp: " Michal Orzel
2021-04-27  9:35 ` [PATCH v2 02/10] arm/domain: " Michal Orzel
2021-04-27  9:45   ` Julien Grall
2021-04-29  6:58     ` Michal Orzel
2021-04-27  9:35 ` Michal Orzel [this message]
2021-04-27  9:47   ` [PATCH v2 03/10] arm: Modify type of actlr to register_t Julien Grall
2021-04-29  7:10     ` Michal Orzel
2021-04-27  9:35 ` [PATCH v2 04/10] arm/gic: Remove member hcr of structure gic_v3 Michal Orzel
2021-04-27  9:48   ` Julien Grall
2021-04-27  9:35 ` [PATCH v2 05/10] arm/gic: Get rid of READ/WRITE_SYSREG32 Michal Orzel
2021-04-27 10:02   ` Julien Grall
2021-04-29  7:14     ` Michal Orzel
2021-04-27  9:35 ` [PATCH v2 06/10] arm/p2m: " Michal Orzel
2021-04-27  9:35 ` [PATCH v2 07/10] arm/mm: " Michal Orzel
2021-04-27  9:59   ` Julien Grall
2021-04-29  7:16     ` Michal Orzel
2021-04-27  9:35 ` [PATCH v2 08/10] arm/page: " Michal Orzel
2021-04-27  9:35 ` [PATCH v2 09/10] arm/time,vtimer: " Michal Orzel
2021-04-27 10:09   ` Julien Grall
2021-04-27  9:35 ` [PATCH v2 10/10] arm64: Change type of hsr, cpsr, spsr_el1 to uint64_t Michal Orzel
2021-04-27 11:09   ` Julien Grall
2021-04-29  8:53     ` Michal Orzel
2021-04-29 10:31       ` Tamas K Lengyel
2021-04-29 10:35         ` Julien Grall

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