From: Fuad Tabba <tabba@google.com>
To: Marc Zyngier <maz@kernel.org>, Oliver Upton <oupton@kernel.org>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Steffen Eiden <seiden@linux.ibm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Vincent Donnefort <vdonnefort@google.com>,
Sascha Bischoff <Sascha.Bischoff@arm.com>,
tabba@google.com
Subject: [PATCH 4/7] KVM: arm64: Set IL for injected FPAC exceptions during ERET emulation
Date: Sun, 14 Jun 2026 17:33:33 +0100 [thread overview]
Message-ID: <20260614163336.3490925-5-tabba@google.com> (raw)
In-Reply-To: <20260614163336.3490925-1-tabba@google.com>
The FPAC syndrome constructed during nested ERET emulation does not set
IL. For FPAC (EC=0x1C), IL reflects the instruction length. ERET and
its authenticated variants are always A64 32-bit instructions, so IL
must be 1.
Fixes: 213b3d1ea161 ("KVM: arm64: nv: Handle ERETA[AB] instructions")
Signed-off-by: Fuad Tabba <tabba@google.com>
---
arch/arm64/kvm/emulate-nested.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c
index dba7ced74ca5..4b39363cf891 100644
--- a/arch/arm64/kvm/emulate-nested.c
+++ b/arch/arm64/kvm/emulate-nested.c
@@ -2777,7 +2777,7 @@ void kvm_emulate_nested_eret(struct kvm_vcpu *vcpu)
*/
if (kvm_has_pauth(vcpu->kvm, FPACCOMBINE) && !(spsr & PSR_IL_BIT)) {
esr &= ESR_ELx_ERET_ISS_ERETA;
- esr |= FIELD_PREP(ESR_ELx_EC_MASK, ESR_ELx_EC_FPAC);
+ esr |= FIELD_PREP(ESR_ELx_EC_MASK, ESR_ELx_EC_FPAC) | ESR_ELx_IL;
kvm_inject_nested_sync(vcpu, esr);
return;
}
--
2.54.0.1136.gdb2ca164c4-goog
next prev parent reply other threads:[~2026-06-14 16:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-14 16:33 [PATCH 0/7] KVM: arm64: Fix missing ESR_ELx.IL in syndrome injection Fuad Tabba
2026-06-14 16:33 ` [PATCH 1/7] KVM: arm64: Set ESR_ELx.IL for injected undefined exceptions at EL2 Fuad Tabba
2026-06-14 16:33 ` [PATCH 2/7] KVM: arm64: Unconditionally set IL for injected undefined exceptions Fuad Tabba
2026-06-14 16:33 ` [PATCH 3/7] KVM: arm64: Unconditionally set IL for injected abort exceptions Fuad Tabba
2026-06-14 16:33 ` Fuad Tabba [this message]
2026-06-14 16:33 ` [PATCH 5/7] KVM: arm64: Set IL for emulated SError injection Fuad Tabba
2026-06-14 16:33 ` [PATCH 6/7] KVM: arm64: Set IL for nested " Fuad Tabba
2026-06-14 16:33 ` [PATCH 7/7] KVM: arm64: Set IL in fake ESR for pKVM memory sharing exit Fuad Tabba
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=20260614163336.3490925-5-tabba@google.com \
--to=tabba@google.com \
--cc=Sascha.Bischoff@arm.com \
--cc=catalin.marinas@arm.com \
--cc=joey.gouly@arm.com \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maz@kernel.org \
--cc=oupton@kernel.org \
--cc=seiden@linux.ibm.com \
--cc=suzuki.poulose@arm.com \
--cc=vdonnefort@google.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.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