From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: seanjc@google.com, David Matlack <dmatlack@google.com>
Subject: [PATCH 02/22] KVM: x86/mmu: constify uses of struct kvm_mmu_role_regs
Date: Thu, 14 Apr 2022 03:39:40 -0400 [thread overview]
Message-ID: <20220414074000.31438-3-pbonzini@redhat.com> (raw)
In-Reply-To: <20220414074000.31438-1-pbonzini@redhat.com>
struct kvm_mmu_role_regs is computed just once and then accessed. Use
const to make this clearer, even though the const fields of struct
kvm_mmu_role_regs already prevent (or make it harder...) to modify
the contents of the struct.
Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/mmu/mmu.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 797c51bb6cda..07b8550e68e9 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -197,7 +197,8 @@ struct kvm_mmu_role_regs {
* the single source of truth for the MMU's state.
*/
#define BUILD_MMU_ROLE_REGS_ACCESSOR(reg, name, flag) \
-static inline bool __maybe_unused ____is_##reg##_##name(struct kvm_mmu_role_regs *regs)\
+static inline bool __maybe_unused \
+____is_##reg##_##name(const struct kvm_mmu_role_regs *regs) \
{ \
return !!(regs->reg & flag); \
}
@@ -244,7 +245,7 @@ static struct kvm_mmu_role_regs vcpu_to_role_regs(struct kvm_vcpu *vcpu)
return regs;
}
-static int role_regs_to_root_level(struct kvm_mmu_role_regs *regs)
+static int role_regs_to_root_level(const struct kvm_mmu_role_regs *regs)
{
if (!____is_cr0_pg(regs))
return 0;
@@ -4705,7 +4706,7 @@ static void paging32_init_context(struct kvm_mmu *context)
}
static union kvm_mmu_extended_role kvm_calc_mmu_role_ext(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs)
+ const struct kvm_mmu_role_regs *regs)
{
union kvm_mmu_extended_role ext = {0};
@@ -4728,7 +4729,7 @@ static union kvm_mmu_extended_role kvm_calc_mmu_role_ext(struct kvm_vcpu *vcpu,
}
static union kvm_mmu_role kvm_calc_mmu_role_common(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs,
+ const struct kvm_mmu_role_regs *regs,
bool base_only)
{
union kvm_mmu_role role = {0};
@@ -4764,7 +4765,8 @@ static inline int kvm_mmu_get_tdp_level(struct kvm_vcpu *vcpu)
static union kvm_mmu_role
kvm_calc_tdp_mmu_root_page_role(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs, bool base_only)
+ const struct kvm_mmu_role_regs *regs,
+ bool base_only)
{
union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs, base_only);
@@ -4810,7 +4812,8 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
static union kvm_mmu_role
kvm_calc_shadow_root_page_role_common(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs, bool base_only)
+ const struct kvm_mmu_role_regs *regs,
+ bool base_only)
{
union kvm_mmu_role role = kvm_calc_mmu_role_common(vcpu, regs, base_only);
@@ -4823,7 +4826,8 @@ kvm_calc_shadow_root_page_role_common(struct kvm_vcpu *vcpu,
static union kvm_mmu_role
kvm_calc_shadow_mmu_root_page_role(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs, bool base_only)
+ const struct kvm_mmu_role_regs *regs,
+ bool base_only)
{
union kvm_mmu_role role =
kvm_calc_shadow_root_page_role_common(vcpu, regs, base_only);
@@ -4841,7 +4845,7 @@ kvm_calc_shadow_mmu_root_page_role(struct kvm_vcpu *vcpu,
}
static void shadow_mmu_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *context,
- struct kvm_mmu_role_regs *regs,
+ const struct kvm_mmu_role_regs *regs,
union kvm_mmu_role new_role)
{
if (new_role.as_u64 == context->mmu_role.as_u64)
@@ -4864,7 +4868,7 @@ static void shadow_mmu_init_context(struct kvm_vcpu *vcpu, struct kvm_mmu *conte
}
static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs)
+ const struct kvm_mmu_role_regs *regs)
{
struct kvm_mmu *context = &vcpu->arch.root_mmu;
union kvm_mmu_role new_role =
@@ -4875,7 +4879,7 @@ static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu,
static union kvm_mmu_role
kvm_calc_shadow_npt_root_page_role(struct kvm_vcpu *vcpu,
- struct kvm_mmu_role_regs *regs)
+ const struct kvm_mmu_role_regs *regs)
{
union kvm_mmu_role role =
kvm_calc_shadow_root_page_role_common(vcpu, regs, false);
@@ -4975,7 +4979,7 @@ static void init_kvm_softmmu(struct kvm_vcpu *vcpu)
}
static union kvm_mmu_role
-kvm_calc_nested_mmu_role(struct kvm_vcpu *vcpu, struct kvm_mmu_role_regs *regs)
+kvm_calc_nested_mmu_role(struct kvm_vcpu *vcpu, const struct kvm_mmu_role_regs *regs)
{
union kvm_mmu_role role;
--
2.31.1
next prev parent reply other threads:[~2022-04-14 7:42 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 7:39 [PATCH v3 00/22] https://www.spinics.net/lists/kvm/msg267878.html Paolo Bonzini
2022-04-14 7:39 ` [PATCH 01/22] KVM: x86/mmu: nested EPT cannot be used in SMM Paolo Bonzini
2022-04-14 7:39 ` Paolo Bonzini [this message]
2022-04-14 7:39 ` [PATCH 03/22] KVM: x86/mmu: pull computation of kvm_mmu_role_regs to kvm_init_mmu Paolo Bonzini
2022-04-14 7:39 ` [PATCH 04/22] KVM: x86/mmu: rephrase unclear comment Paolo Bonzini
2022-04-14 7:39 ` [PATCH 05/22] KVM: x86: Clean up and document nested #PF workaround Paolo Bonzini
2022-04-14 7:39 ` [PATCH 06/22] KVM: x86/mmu: remove "bool base_only" arguments Paolo Bonzini
2022-04-14 7:39 ` [PATCH 07/22] KVM: x86/mmu: split cpu_role from mmu_role Paolo Bonzini
2022-04-15 4:16 ` Like Xu
2022-04-14 7:39 ` [PATCH 08/22] KVM: x86/mmu: do not recompute root level from kvm_mmu_role_regs Paolo Bonzini
2022-04-14 7:39 ` [PATCH 09/22] KVM: x86/mmu: remove ept_ad field Paolo Bonzini
2022-04-14 7:39 ` [PATCH 10/22] KVM: x86/mmu: remove kvm_calc_shadow_root_page_role_common Paolo Bonzini
2022-04-14 7:39 ` [PATCH 11/22] KVM: x86/mmu: cleanup computation of MMU roles for two-dimensional paging Paolo Bonzini
2022-04-14 7:39 ` [PATCH 12/22] KVM: x86/mmu: cleanup computation of MMU roles for shadow paging Paolo Bonzini
2022-04-14 7:39 ` [PATCH 13/22] KVM: x86/mmu: store shadow EFER.NX in the MMU role Paolo Bonzini
2022-04-14 7:39 ` [PATCH 14/22] KVM: x86/mmu: remove extended bits from mmu_role, rename field Paolo Bonzini
2022-04-14 7:39 ` [PATCH 15/22] KVM: x86/mmu: rename kvm_mmu_role union Paolo Bonzini
2022-04-14 7:39 ` [PATCH 16/22] KVM: x86/mmu: remove redundant bits from extended role Paolo Bonzini
2022-04-14 8:27 ` Paolo Bonzini
2022-05-10 0:20 ` Sean Christopherson
2022-05-11 13:53 ` Paolo Bonzini
2022-05-12 13:59 ` Paolo Bonzini
2022-05-12 14:18 ` Sean Christopherson
2022-05-12 16:09 ` Paolo Bonzini
2022-05-12 21:34 ` Sean Christopherson
2022-04-14 7:39 ` [PATCH 17/22] KVM: x86/mmu: remove valid " Paolo Bonzini
2022-04-14 7:39 ` [PATCH 18/22] KVM: x86/mmu: simplify and/or inline computation of shadow MMU roles Paolo Bonzini
2022-04-14 7:39 ` [PATCH 19/22] KVM: x86/mmu: pull CPU mode computation to kvm_init_mmu Paolo Bonzini
2022-04-14 7:39 ` [PATCH 20/22] KVM: x86/mmu: replace shadow_root_level with root_role.level Paolo Bonzini
2022-04-14 7:39 ` [PATCH 21/22] KVM: x86/mmu: replace root_level with cpu_role.base.level Paolo Bonzini
2022-04-14 7:40 ` [PATCH 22/22] KVM: x86/mmu: replace direct_map with root_role.direct Paolo Bonzini
2022-04-14 7:47 ` [PATCH v3 00/22] https://www.spinics.net/lists/kvm/msg267878.html Paolo Bonzini
2022-04-14 15:02 ` Sean Christopherson
2022-04-14 15:09 ` Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220414074000.31438-3-pbonzini@redhat.com \
--to=pbonzini@redhat.com \
--cc=dmatlack@google.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=seanjc@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).