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Message-Id: <20210319100146.1149909-35-qperret@google.com>
Date: Fri, 19 Mar 2021 10:01:42 +0000
From: Quentin Perret <qperret@...gle.com>
To: catalin.marinas@....com, will@...nel.org, maz@...nel.org,
james.morse@....com, julien.thierry.kdev@...il.com,
suzuki.poulose@....com
Cc: android-kvm@...gle.com, seanjc@...gle.com, mate.toth-pal@....com,
linux-kernel@...r.kernel.org, robh+dt@...nel.org,
linux-arm-kernel@...ts.infradead.org, kernel-team@...roid.com,
kvmarm@...ts.cs.columbia.edu, tabba@...gle.com, ardb@...nel.org,
mark.rutland@....com, dbrazdil@...gle.com, qperret@...gle.com
Subject: [PATCH v6 34/38] KVM: arm64: Provide sanitized mmfr* registers at EL2
We will need to read sanitized values of mmfr{0,1}_el1 at EL2 soon, so
add them to the list of copied variables.
Acked-by: Will Deacon <will@...nel.org>
Signed-off-by: Quentin Perret <qperret@...gle.com>
---
arch/arm64/include/asm/kvm_cpufeature.h | 2 ++
arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 2 ++
arch/arm64/kvm/sys_regs.c | 2 ++
3 files changed, 6 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_cpufeature.h b/arch/arm64/include/asm/kvm_cpufeature.h
index c2e7735f502b..ff302d15e840 100644
--- a/arch/arm64/include/asm/kvm_cpufeature.h
+++ b/arch/arm64/include/asm/kvm_cpufeature.h
@@ -20,5 +20,7 @@
#endif
DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0);
+DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1);
+DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1);
#endif
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c
index 71f00aca90e7..17ad1b3a9530 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c
@@ -13,6 +13,8 @@
* Copies of the host's CPU features registers holding sanitized values.
*/
DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0);
+DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1);
+DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1);
/*
* nVHE copy of data structures tracking available CPU cores.
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 3ec34c25e877..dfb3b4f9ca84 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2784,6 +2784,8 @@ struct __ftr_reg_copy_entry {
struct arm64_ftr_reg *dst;
} hyp_ftr_regs[] __initdata = {
CPU_FTR_REG_HYP_COPY(SYS_CTR_EL0, arm64_ftr_reg_ctrel0),
+ CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR0_EL1, arm64_ftr_reg_id_aa64mmfr0_el1),
+ CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR1_EL1, arm64_ftr_reg_id_aa64mmfr1_el1),
};
void __init setup_kvm_el2_caps(void)
--
2.31.0.rc2.261.g7f71774620-goog
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