diff mbox series

[v7,16/38] KVM: arm64: KVM: arm64: Make ID_DFR1_EL1 writable

Message ID 20220419065544.3616948-17-reijiw@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: arm64: Make CPU ID registers writable by userspace | expand

Commit Message

Reiji Watanabe April 19, 2022, 6:55 a.m. UTC 
This patch adds id_reg_desc for ID_DFR1_EL1 to make it writable
by userspace.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
---
 arch/arm64/kvm/sys_regs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 9eca085886f5..3892278deb09 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -4142,6 +4142,13 @@  static struct id_reg_desc id_dfr0_el1_desc = {
 	.vcpu_mask = vcpu_mask_id_dfr0_el1,
 };
 
+static struct id_reg_desc id_dfr1_el1_desc = {
+	.reg_desc = ID_SANITISED(ID_DFR1_EL1),
+	.ftr_bits = {
+		S_FTR_BITS(FTR_LOWER_SAFE, ID_DFR1_MTPMU_SHIFT, 0xf),
+	},
+};
+
 #define ID_DESC(id_reg_name, id_reg_desc)	\
 	[IDREG_IDX(SYS_##id_reg_name)] = (id_reg_desc)
 
@@ -4150,6 +4157,9 @@  static struct id_reg_desc *id_reg_desc_table[KVM_ARM_ID_REG_MAX_NUM] = {
 	/* CRm=1 */
 	ID_DESC(ID_DFR0_EL1, &id_dfr0_el1_desc),
 
+	/* CRm=3 */
+	ID_DESC(ID_DFR1_EL1, &id_dfr1_el1_desc),
+
 	/* CRm=4 */
 	ID_DESC(ID_AA64PFR0_EL1, &id_aa64pfr0_el1_desc),
 	ID_DESC(ID_AA64PFR1_EL1, &id_aa64pfr1_el1_desc),