On 10-06-19, 10:09, Dave Martin wrote:
> You could drop the extra level of indirection on vqs now. The only
> thing it achieves is to enforce the size of the array via type-
> checkout, but the macro can't easily do that (unless you can think
> of another way to do it).
>
> Otherwise, looks good.
Below is what I wrote initially this morning and then moved to the
current version as I wasn't sure if you would want that :)
--
viresh
-------------------------8<-------------------------
>From be823e68faffc82a6f621c16ce1bd45990d92791 Mon Sep 17 00:00:00 2001
Message-Id: <be823e68faffc82a6f621c16ce1bd45990d92791.1560160165.git.viresh.kumar@xxxxxxxxxx>
From: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Date: Mon, 10 Jun 2019 11:15:17 +0530
Subject: [PATCH] KVM: arm64: Implement vq_present() as a macro
This routine is a one-liner and doesn't really need to be function and
can be implemented as a macro.
Suggested-by: Dave Martin <Dave.Martin@xxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
arch/arm64/kvm/guest.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 3ae2f82fca46..ae734fcfd4ea 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -207,13 +207,7 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
#define vq_word(vq) (((vq) - SVE_VQ_MIN) / 64)
#define vq_mask(vq) ((u64)1 << ((vq) - SVE_VQ_MIN) % 64)
-
-static bool vq_present(
- const u64 (*const vqs)[KVM_ARM64_SVE_VLS_WORDS],
- unsigned int vq)
-{
- return (*vqs)[vq_word(vq)] & vq_mask(vq);
-}
+#define vq_present(vqs, vq) ((vqs)[vq_word(vq)] & vq_mask(vq))
static int get_sve_vls(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
{
@@ -258,7 +252,7 @@ static int set_sve_vls(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
max_vq = 0;
for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; ++vq)
- if (vq_present(&vqs, vq))
+ if (vq_present(vqs, vq))
max_vq = vq;
if (max_vq > sve_vq_from_vl(kvm_sve_max_vl))
@@ -272,7 +266,7 @@ static int set_sve_vls(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
* maximum:
*/
for (vq = SVE_VQ_MIN; vq <= max_vq; ++vq)
- if (vq_present(&vqs, vq) != sve_vq_available(vq))
+ if (vq_present(vqs, vq) != sve_vq_available(vq))
return -EINVAL;
/* Can't run with no vector lengths at all: */
--
2.21.0.rc0.269.g1a574e7a288b
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