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Subject[PATCH V3 4/5] X86: Hyper-V: Consolidate code for converting cpumask to vpset
Date
From: "K. Y. Srinivasan" <kys@microsoft.com>

Consolidate code for converting cpumask to vpset.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
---
arch/x86/hyperv/mmu.c | 43 ++-----------------------------------------
1 file changed, 2 insertions(+), 41 deletions(-)

diff --git a/arch/x86/hyperv/mmu.c b/arch/x86/hyperv/mmu.c
index adee39a7a3f2..c9cd28f0bae4 100644
--- a/arch/x86/hyperv/mmu.c
+++ b/arch/x86/hyperv/mmu.c
@@ -25,11 +25,7 @@ struct hv_flush_pcpu {
struct hv_flush_pcpu_ex {
u64 address_space;
u64 flags;
- struct {
- u64 format;
- u64 valid_bank_mask;
- u64 bank_contents[];
- } hv_vp_set;
+ struct hv_vpset hv_vp_set;
u64 gva_list[];
};

@@ -70,41 +66,6 @@ static inline int fill_gva_list(u64 gva_list[], int offset,
return gva_n - offset;
}

-/* Return the number of banks in the resulting vp_set */
-static inline int cpumask_to_vp_set(struct hv_flush_pcpu_ex *flush,
- const struct cpumask *cpus)
-{
- int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1;
-
- /* valid_bank_mask can represent up to 64 banks */
- if (hv_max_vp_index / 64 >= 64)
- return 0;
-
- /*
- * Clear all banks up to the maximum possible bank as hv_flush_pcpu_ex
- * structs are not cleared between calls, we risk flushing unneeded
- * vCPUs otherwise.
- */
- for (vcpu_bank = 0; vcpu_bank <= hv_max_vp_index / 64; vcpu_bank++)
- flush->hv_vp_set.bank_contents[vcpu_bank] = 0;
-
- /*
- * Some banks may end up being empty but this is acceptable.
- */
- for_each_cpu(cpu, cpus) {
- vcpu = hv_cpu_number_to_vp_number(cpu);
- vcpu_bank = vcpu / 64;
- vcpu_offset = vcpu % 64;
- __set_bit(vcpu_offset, (unsigned long *)
- &flush->hv_vp_set.bank_contents[vcpu_bank]);
- if (vcpu_bank >= nr_bank)
- nr_bank = vcpu_bank + 1;
- }
- flush->hv_vp_set.valid_bank_mask = GENMASK_ULL(nr_bank - 1, 0);
-
- return nr_bank;
-}
-
static void hyperv_flush_tlb_others(const struct cpumask *cpus,
const struct flush_tlb_info *info)
{
@@ -240,7 +201,7 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,

if (!cpumask_equal(cpus, cpu_present_mask)) {
flush->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K;
- nr_bank = cpumask_to_vp_set(flush, cpus);
+ nr_bank = cpumask_to_vpset(&(flush->hv_vp_set), cpus);
}

if (!nr_bank) {
--
2.17.0
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