From: Dave Martin <Dave.Martin@arm.com>
To: kvmarm@lists.cs.columbia.edu
Cc: "Christoffer Dall" <cdall@kernel.org>,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Andre Przywara" <andre.przywara@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"Kristina Martsenko" <kristina.martsenko@arm.com>,
"Zhang Lei" <zhang.lei@jp.fujitsu.com>,
"Amit Daniel Kachhap" <amit.kachhap@arm.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH kvmtool v4 7/8] arm/arm64: Factor out ptrauth vcpu feature setup
Date: Fri, 7 Jun 2019 12:26:28 +0100 [thread overview]
Message-ID: <1559906789-20936-8-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1559906789-20936-1-git-send-email-Dave.Martin@arm.com>
In the interest of readability, factor out the vcpu feature setup
for ptrauth into a separate function.
Also, because aarch32 doesn't have this feature or the related
command line options anyway, move the actual code into aarch64/.
Since ARM_VCPU_PTRAUTH_FEATURE is only there to make the ptrauth
feature setup code compile on arm, it is no longer needed: inline
and remove it.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
arm/aarch32/include/kvm/kvm-cpu-arch.h | 3 ++-
arm/aarch64/include/kvm/kvm-cpu-arch.h | 3 +--
arm/aarch64/kvm-cpu.c | 10 ++++++++++
arm/kvm-cpu.c | 5 +----
4 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/arm/aarch32/include/kvm/kvm-cpu-arch.h b/arm/aarch32/include/kvm/kvm-cpu-arch.h
index 3ec6f03..01983f0 100644
--- a/arm/aarch32/include/kvm/kvm-cpu-arch.h
+++ b/arm/aarch32/include/kvm/kvm-cpu-arch.h
@@ -13,6 +13,7 @@
#define ARM_CPU_ID 0, 0, 0
#define ARM_CPU_ID_MPIDR 5
-#define ARM_VCPU_PTRAUTH_FEATURE 0
+static inline void kvm_cpu__select_features(struct kvm *kvm,
+ struct kvm_vcpu_init *init) { }
#endif /* KVM__KVM_CPU_ARCH_H */
diff --git a/arm/aarch64/include/kvm/kvm-cpu-arch.h b/arm/aarch64/include/kvm/kvm-cpu-arch.h
index 9fa99fb..e6875fc 100644
--- a/arm/aarch64/include/kvm/kvm-cpu-arch.h
+++ b/arm/aarch64/include/kvm/kvm-cpu-arch.h
@@ -17,7 +17,6 @@
#define ARM_CPU_CTRL 3, 0, 1, 0
#define ARM_CPU_CTRL_SCTLR_EL1 0
-#define ARM_VCPU_PTRAUTH_FEATURE ((1UL << KVM_ARM_VCPU_PTRAUTH_ADDRESS) \
- | (1UL << KVM_ARM_VCPU_PTRAUTH_GENERIC))
+void kvm_cpu__select_features(struct kvm *kvm, struct kvm_vcpu_init *init);
#endif /* KVM__KVM_CPU_ARCH_H */
diff --git a/arm/aarch64/kvm-cpu.c b/arm/aarch64/kvm-cpu.c
index 0aaefaf..8c29a21 100644
--- a/arm/aarch64/kvm-cpu.c
+++ b/arm/aarch64/kvm-cpu.c
@@ -128,6 +128,16 @@ static void reset_vcpu_aarch64(struct kvm_cpu *vcpu)
}
}
+void kvm_cpu__select_features(struct kvm *kvm, struct kvm_vcpu_init *init)
+{
+ /* Enable pointer authentication if available */
+ if (kvm__supports_extension(kvm, KVM_CAP_ARM_PTRAUTH_ADDRESS) &&
+ kvm__supports_extension(kvm, KVM_CAP_ARM_PTRAUTH_GENERIC)) {
+ init->features[0] |= 1UL << KVM_ARM_VCPU_PTRAUTH_ADDRESS;
+ init->features[0] |= 1UL << KVM_ARM_VCPU_PTRAUTH_GENERIC;
+ }
+}
+
void kvm_cpu__reset_vcpu(struct kvm_cpu *vcpu)
{
if (vcpu->kvm->cfg.arch.aarch32_guest)
diff --git a/arm/kvm-cpu.c b/arm/kvm-cpu.c
index fff8494..1652f6f 100644
--- a/arm/kvm-cpu.c
+++ b/arm/kvm-cpu.c
@@ -68,10 +68,7 @@ struct kvm_cpu *kvm_cpu__arch_init(struct kvm *kvm, unsigned long cpu_id)
vcpu_init.features[0] |= (1UL << KVM_ARM_VCPU_PSCI_0_2);
}
- /* Enable pointer authentication if available */
- if (kvm__supports_extension(kvm, KVM_CAP_ARM_PTRAUTH_ADDRESS) &&
- kvm__supports_extension(kvm, KVM_CAP_ARM_PTRAUTH_GENERIC))
- vcpu_init.features[0] |= ARM_VCPU_PTRAUTH_FEATURE;
+ kvm_cpu__select_features(kvm, &vcpu_init);
/*
* If the preferred target ioctl is successful then
--
2.1.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-06-07 11:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-07 11:26 [PATCH kvmtool v4 0/8] arm64: Pointer Authentication and SVE support Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 1/8] update_headers.sh: Add missing shell quoting Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 2/8] update_headers.sh: Cleanly report failure on error Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 3/8] update_headers.sh: arm64: Copy sve_context.h if available Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 4/8] update_headers: Sync kvm UAPI headers with linux v5.2-rc1 Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 5/8] KVM: arm/arm64: Add a vcpu feature for pointer authentication Dave Martin
2019-06-07 11:26 ` [PATCH kvmtool v4 6/8] KVM: arm/arm64: Back out ptrauth command-line arguments Dave Martin
2019-07-18 13:00 ` Andre Przywara
2019-06-07 11:26 ` Dave Martin [this message]
2019-06-07 11:26 ` [PATCH kvmtool v4 8/8] arm64: Add SVE support Dave Martin
2019-07-03 9:35 ` [PATCH kvmtool v4 0/8] arm64: Pointer Authentication and " Will Deacon
2019-07-03 11:07 ` Dave Martin
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=1559906789-20936-8-git-send-email-Dave.Martin@arm.com \
--to=dave.martin@arm.com \
--cc=alex.bennee@linaro.org \
--cc=amit.kachhap@arm.com \
--cc=andre.przywara@arm.com \
--cc=cdall@kernel.org \
--cc=kristina.martsenko@arm.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=marc.zyngier@arm.com \
--cc=will.deacon@arm.com \
--cc=zhang.lei@jp.fujitsu.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).