From: David Brazdil <dbrazdil@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Dennis Zhou <dennis@kernel.org>, Tejun Heo <tj@kernel.org>,
Christoph Lameter <cl@linux.com>, Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-team@google.com, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 9/9] kvm: arm64: Remove unnecessary hyp mappings
Date: Wed, 22 Jul 2020 17:44:24 +0100 [thread overview]
Message-ID: <20200722164424.42225-10-dbrazdil@google.com> (raw)
In-Reply-To: <20200722164424.42225-1-dbrazdil@google.com>
With all nVHE per-CPU variables being part of the hyp per-CPU region,
mapping them individual is not necessary any longer. They are mapped to hyp
as part of the overall per-CPU region.
Signed-off-by: David Brazdil <dbrazdil@google.com>
---
arch/arm64/include/asm/kvm_mmu.h | 25 +++++++------------------
arch/arm64/kvm/arm.c | 17 +----------------
2 files changed, 8 insertions(+), 34 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index e9e5875274cb..1a66089cf4f4 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -531,28 +531,17 @@ static inline int kvm_map_vectors(void)
DECLARE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required);
DECLARE_KVM_NVHE_PER_CPU(u64, arm64_ssbd_callback_required);
-static inline int hyp_init_aux_data(void)
+static inline void hyp_init_aux_data(void)
{
- int cpu, err;
+ int cpu;
- for_each_possible_cpu(cpu) {
- u64 *ptr;
-
- ptr = per_cpu_ptr_nvhe(arm64_ssbd_callback_required, cpu);
- err = create_hyp_mappings(ptr, ptr + 1, PAGE_HYP);
- if (err)
- return err;
-
- /* Copy value from kernel to hyp. */
- *ptr = per_cpu(arm64_ssbd_callback_required, cpu);
- }
- return 0;
+ /* Copy arm64_ssbd_callback_required values from kernel to hyp. */
+ for_each_possible_cpu(cpu)
+ *(per_cpu_ptr_nvhe(arm64_ssbd_callback_required, cpu)) =
+ per_cpu(arm64_ssbd_callback_required, cpu);
}
#else
-static inline int hyp_init_aux_data(void)
-{
- return 0;
-}
+static inline void hyp_init_aux_data(void) {}
#endif
#define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index bbbc5c1519a9..f2e537d99d2b 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1628,22 +1628,7 @@ static int init_hyp_mode(void)
}
}
- for_each_possible_cpu(cpu) {
- kvm_host_data_t *cpu_data;
-
- cpu_data = per_cpu_ptr_hyp(kvm_host_data, cpu);
- err = create_hyp_mappings(cpu_data, cpu_data + 1, PAGE_HYP);
-
- if (err) {
- kvm_err("Cannot map host CPU state: %d\n", err);
- goto out_err;
- }
- }
-
- err = hyp_init_aux_data();
- if (err)
- kvm_err("Cannot map host auxiliary data: %d\n", err);
-
+ hyp_init_aux_data();
return 0;
out_err:
--
2.27.0
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prev parent reply other threads:[~2020-07-22 16:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 16:44 [PATCH 0/9] Independent per-CPU data section for nVHE David Brazdil
2020-07-22 16:44 ` [PATCH 1/9] Macros to override naming of percpu symbols and sections David Brazdil
2020-07-22 16:44 ` [PATCH 2/9] kvm: arm64: Remove __hyp_this_cpu_read David Brazdil
2020-07-22 16:44 ` [PATCH 3/9] kvm: arm64: Remove hyp_adr/ldr_this_cpu David Brazdil
2020-07-22 16:44 ` [PATCH 4/9] kvm: arm64: Add helpers for accessing nVHE hyp per-cpu vars David Brazdil
2020-07-22 16:44 ` [PATCH 5/9] kvm: arm64: Duplicate arm64_ssbd_callback_required for nVHE hyp David Brazdil
2020-07-22 16:44 ` [PATCH 6/9] kvm: arm64: Create separate instances of kvm_host_data for VHE/nVHE David Brazdil
2020-07-22 16:44 ` [PATCH 7/9] kvm: arm64: Mark hyp stack pages reserved David Brazdil
2020-07-22 16:44 ` [PATCH 8/9] kvm: arm64: Set up hyp percpu data for nVHE David Brazdil
2020-07-22 16:44 ` David Brazdil [this message]
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