[Xen-devel] [PATCH 11/21] arm: context switch virtual timer registers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Tim Deegan <tim@xxxxxxx>
---
 xen/arch/arm/domain.c        |   10 ++++++++++
 xen/include/asm-arm/cpregs.h |    3 +++
 xen/include/asm-arm/domain.h |    5 +++++
 3 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index a7b7d4a..2b5515d 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -49,6 +49,11 @@ static void ctxt_switch_from(struct vcpu *p)
     p->arch.tpidruro = READ_CP32(TPIDRURO);
     p->arch.tpidrprw = READ_CP32(TPIDRPRW);
 
+    /* Arch timer */
+    p->arch.cntvoff = READ_CP64(CNTVOFF);
+    p->arch.cntv_cval = READ_CP64(CNTV_CVAL);
+    p->arch.cntv_ctl = READ_CP32(CNTV_CTL);
+
     /* XXX only save these if ThumbEE e.g. ID_PFR0.THUMB_EE_SUPPORT */
     p->arch.teecr = READ_CP32(TEECR);
     p->arch.teehbr = READ_CP32(TEEHBR);
@@ -128,6 +133,11 @@ static void ctxt_switch_to(struct vcpu *n)
     WRITE_CP32(n->arch.mair1, MAIR1);
     isb();
 
+    /* Arch timer */
+    WRITE_CP64(n->arch.cntvoff, CNTVOFF);
+    WRITE_CP64(n->arch.cntv_cval, CNTV_CVAL);
+    WRITE_CP32(n->arch.cntv_ctl, CNTV_CTL);
+
     /* Control Registers */
     WRITE_CP32(n->arch.actlr, ACTLR);
     WRITE_CP32(n->arch.sctlr, SCTLR);
diff --git a/xen/include/asm-arm/cpregs.h b/xen/include/asm-arm/cpregs.h
index bd46942..34a9e93 100644
--- a/xen/include/asm-arm/cpregs.h
+++ b/xen/include/asm-arm/cpregs.h
@@ -238,10 +238,13 @@
 #define CNTP_CTL        p15,0,c14,c2,1  /* Physical Timer control register */
 #define CNTVCT          p15,1,c14       /* Time counter value + offset */
 #define CNTP_CVAL       p15,2,c14       /* Physical Timer comparator */
+#define CNTV_CVAL       p15,3,c14       /* Virt. Timer comparator */
 #define CNTVOFF         p15,4,c14       /* Time counter offset */
 #define CNTHCTL         p15,4,c14,c1,0  /* Time counter hyp. control */
 #define CNTHP_TVAL      p15,4,c14,c2,0  /* Hyp. Timer value */
 #define CNTHP_CTL       p15,4,c14,c2,1  /* Hyp. Timer control register */
+#define CNTV_TVAL       p15,0,c14,c3,0  /* Virt. Timer value */
+#define CNTV_CTL        p15,0,c14,c3,1  /* Virt. TImer control register */
 #define CNTHP_CVAL      p15,6,c14       /* Hyp. Timer comparator */
 
 /* CP15 CR15: Implementation Defined Registers */
diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h
index 32deb52..230ea8c 100644
--- a/xen/include/asm-arm/domain.h
+++ b/xen/include/asm-arm/domain.h
@@ -111,6 +111,11 @@ struct arch_vcpu
     uint32_t teecr, teehbr;
     uint32_t joscr, jmcr;
 
+    /* Arch timers */
+    uint64_t cntvoff;
+    uint64_t cntv_cval;
+    uint32_t cntv_ctl;
+
     /* CP 15 */
     uint32_t csselr;
 
-- 
1.7.9.1


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