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From: David Brazdil <dbrazdil@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	kernel-team@android.com, Jonathan Corbet <corbet@lwn.net>,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	Sudeep Holla <sudeep.holla@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Marc Zyngier <maz@kernel.org>, Tejun Heo <tj@kernel.org>,
	Dennis Zhou <dennis@kernel.org>, Christoph Lameter <cl@linux.com>,
	Will Deacon <will@kernel.org>
Subject: [PATCH v4 07/26] arm64: Make cpu_logical_map() take unsigned int
Date: Wed,  2 Dec 2020 18:41:03 +0000	[thread overview]
Message-ID: <20201202184122.26046-8-dbrazdil@google.com> (raw)
In-Reply-To: <20201202184122.26046-1-dbrazdil@google.com>

CPU index should never be negative. Change the signature of
(set_)cpu_logical_map to take an unsigned int.

This still works even if the users treat the CPU index as an int,
and will allow the hypervisor's implementation to check that the index
is valid with a single upper-bound check.

Signed-off-by: David Brazdil <dbrazdil@google.com>
---
 arch/arm64/include/asm/smp.h | 4 ++--
 arch/arm64/kernel/setup.c    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index 2e7f529ec5a6..bcb01ca15325 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -46,9 +46,9 @@ DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
  * Logical CPU mapping.
  */
 extern u64 __cpu_logical_map[NR_CPUS];
-extern u64 cpu_logical_map(int cpu);
+extern u64 cpu_logical_map(unsigned int cpu);
 
-static inline void set_cpu_logical_map(int cpu, u64 hwid)
+static inline void set_cpu_logical_map(unsigned int cpu, u64 hwid)
 {
 	__cpu_logical_map[cpu] = hwid;
 }
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 133257ffd859..2f2973bc67c7 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -276,7 +276,7 @@ arch_initcall(reserve_memblock_reserved_regions);
 
 u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
 
-u64 cpu_logical_map(int cpu)
+u64 cpu_logical_map(unsigned int cpu)
 {
 	return __cpu_logical_map[cpu];
 }
-- 
2.29.2.454.gaff20da3a2-goog

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  parent reply	other threads:[~2020-12-02 18:41 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-02 18:40 [PATCH v4 00/26] Opt-in always-on nVHE hypervisor David Brazdil
2020-12-02 18:40 ` [PATCH v4 01/26] kvm: arm64: Add kvm-arm.mode early kernel parameter David Brazdil
2020-12-02 18:40 ` [PATCH v4 02/26] kvm: arm64: Add ARM64_KVM_PROTECTED_MODE CPU capability David Brazdil
2020-12-02 18:40 ` [PATCH v4 03/26] psci: Support psci_ops.get_version for v0.1 David Brazdil
2020-12-02 18:41 ` [PATCH v4 04/26] psci: Split functions to v0.1 and v0.2+ variants David Brazdil
2020-12-03 10:42   ` Mark Rutland
2020-12-02 18:41 ` [PATCH v4 05/26] psci: Replace psci_function_id array with a struct David Brazdil
2020-12-03 10:43   ` Mark Rutland
2020-12-02 18:41 ` [PATCH v4 06/26] psci: Add accessor for psci_0_1_function_ids David Brazdil
2020-12-03 10:47   ` Mark Rutland
2020-12-03 10:51     ` David Brazdil
2020-12-02 18:41 ` David Brazdil [this message]
2020-12-02 18:41 ` [PATCH v4 08/26] arm64: Extract parts of el2_setup into a macro David Brazdil
2020-12-02 18:41 ` [PATCH v4 09/26] kvm: arm64: Remove vector_ptr param of hyp-init David Brazdil
2020-12-02 18:41 ` [PATCH v4 10/26] kvm: arm64: Move hyp-init params to a per-CPU struct David Brazdil
2020-12-02 18:41 ` [PATCH v4 11/26] kvm: arm64: Init MAIR/TCR_EL2 from params struct David Brazdil
2020-12-02 18:41 ` [PATCH v4 12/26] kvm: arm64: Add .hyp.data..ro_after_init ELF section David Brazdil
2020-12-02 18:41 ` [PATCH v4 13/26] kvm: arm64: Support per_cpu_ptr in nVHE hyp code David Brazdil
2020-12-02 18:41 ` [PATCH v4 14/26] kvm: arm64: Create nVHE copy of cpu_logical_map David Brazdil
2020-12-02 18:41 ` [PATCH v4 15/26] kvm: arm64: Add SMC handler in nVHE EL2 David Brazdil
2020-12-03 13:31   ` Marc Zyngier
2020-12-02 18:41 ` [PATCH v4 16/26] kvm: arm64: Bootstrap PSCI " David Brazdil
2020-12-03 10:55   ` Mark Rutland
2020-12-03 13:46   ` Marc Zyngier
2020-12-02 18:41 ` [PATCH v4 17/26] kvm: arm64: Add offset for hyp VA <-> PA conversion David Brazdil
2020-12-07 22:29   ` Qian Cai
2020-12-08 10:08     ` David Brazdil
2020-12-02 18:41 ` [PATCH v4 18/26] kvm: arm64: Forward safe PSCI SMCs coming from host David Brazdil
2020-12-02 18:41 ` [PATCH v4 19/26] kvm: arm64: Extract __do_hyp_init into a helper function David Brazdil
2020-12-02 18:41 ` [PATCH v4 20/26] kvm: arm64: Add function to enter host from KVM nVHE hyp code David Brazdil
2020-12-02 18:41 ` [PATCH v4 21/26] kvm: arm64: Intercept host's CPU_ON SMCs David Brazdil
2020-12-02 18:41 ` [PATCH v4 22/26] kvm: arm64: Intercept host's CPU_SUSPEND PSCI SMCs David Brazdil
2020-12-02 18:41 ` [PATCH v4 23/26] kvm: arm64: Intercept host's SYSTEM_SUSPEND " David Brazdil
2020-12-02 18:41 ` [PATCH v4 24/26] kvm: arm64: Keep nVHE EL2 vector installed David Brazdil
2020-12-02 18:41 ` [PATCH v4 25/26] kvm: arm64: Trap host SMCs in protected mode David Brazdil
2020-12-02 18:41 ` [PATCH v4 26/26] kvm: arm64: Fix EL2 mode availability checks David Brazdil
2020-12-03 19:23 ` [PATCH v4 00/26] Opt-in always-on nVHE hypervisor Marc Zyngier
2020-12-08 19:14   ` David Brazdil
2020-12-08 20:12     ` Marc Zyngier

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