lkml.org 
[lkml]   [2020]   [Sep]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 11/11] kvm: arm64: Remove unnecessary hyp mappings
Date
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.

Acked-by: Andrew Scull<ascull@google.com>
Signed-off-by: David Brazdil <dbrazdil@google.com>
---
arch/arm64/include/asm/kvm_mmu.h | 19 +++++--------------
arch/arm64/kvm/arm.c | 17 +----------------
2 files changed, 6 insertions(+), 30 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 9db93da35606..7d1581bc8b97 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -531,28 +531,19 @@ 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;

+ /* Copy arm64_ssbd_callback_required values from kernel to hyp. */
for_each_possible_cpu(cpu) {
- u64 *ptr;
+ u64 *ptr = per_cpu_ptr_nvhe(arm64_ssbd_callback_required, cpu);

- 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;
}
#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 8293319a32e7..4483b6aca5d7 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1634,22 +1634,7 @@ 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:
--
2.28.0.618.gf4bc123cb7-goog
\
 
 \ /
  Last update: 2020-09-16 22:02    [W:0.118 / U:1.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site