[PATCH v6 03/12] KVM: SVM: Change intercept_dr to generic intercepts

Babu Moger
2020-09-11T19:32:45Z

Modify intercept_dr to generic intercepts in vmcb_control_area. Use
the generic vmcb_set_intercept, vmcb_clr_intercept and vmcb_is_intercept
to set/clear/test the intercept_dr bits.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
---
arch/x86/include/asm/svm.h | 36 ++++++++++++++++++------------------
arch/x86/kvm/svm/nested.c | 6 +-----
arch/x86/kvm/svm/svm.c | 4 ++--
arch/x86/kvm/svm/svm.h | 34 +++++++++++++++++-----------------
4 files changed, 38 insertions(+), 42 deletions(-)

diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index d4739f4eae63..ffc89d8e4fcb 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -11,6 +11,7 @@

enum vector_offset {
CR_VECTOR = 0,
+ DR_VECTOR,
MAX_VECTORS,
};

@@ -34,6 +35,23 @@ enum {
INTERCEPT_CR6_WRITE,
INTERCEPT_CR7_WRITE,
INTERCEPT_CR8_WRITE,
+ /* Byte offset 004h (Vector 1) */
+ INTERCEPT_DR0_READ = 32,
+ INTERCEPT_DR1_READ,
+ INTERCEPT_DR2_READ,
+ INTERCEPT_DR3_READ,
+ INTERCEPT_DR4_READ,
+ INTERCEPT_DR5_READ,
+ INTERCEPT_DR6_READ,
+ INTERCEPT_DR7_READ,
+ INTERCEPT_DR0_WRITE = 48,
+ INTERCEPT_DR1_WRITE,
+ INTERCEPT_DR2_WRITE,
+ INTERCEPT_DR3_WRITE,
+ INTERCEPT_DR4_WRITE,
+ INTERCEPT_DR5_WRITE,
+ INTERCEPT_DR6_WRITE,
+ INTERCEPT_DR7_WRITE,
};

enum {
@@ -89,7 +107,6 @@ enum {

struct __attribute__ ((__packed__)) vmcb_control_area {
u32 intercepts[MAX_VECTORS];
- u32 intercept_dr;
u32 intercept_exceptions;
u64 intercept;
u8 reserved_1[40];
@@ -271,23 +288,6 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_SELECTOR_READ_MASK SVM_SELECTOR_WRITE_MASK
#define SVM_SELECTOR_CODE_MASK (1 << 3)

-#define INTERCEPT_DR0_READ 0
-#define INTERCEPT_DR1_READ 1
-#define INTERCEPT_DR2_READ 2
-#define INTERCEPT_DR3_READ 3
-#define INTERCEPT_DR4_READ 4
-#define INTERCEPT_DR5_READ 5
-#define INTERCEPT_DR6_READ 6
-#define INTERCEPT_DR7_READ 7
-#define INTERCEPT_DR0_WRITE (16 + 0)
-#define INTERCEPT_DR1_WRITE (16 + 1)
-#define INTERCEPT_DR2_WRITE (16 + 2)
-#define INTERCEPT_DR3_WRITE (16 + 3)
-#define INTERCEPT_DR4_WRITE (16 + 4)
-#define INTERCEPT_DR5_WRITE (16 + 5)
-#define INTERCEPT_DR6_WRITE (16 + 6)
-#define INTERCEPT_DR7_WRITE (16 + 7)
-
#define SVM_EVTINJ_VEC_MASK 0xff

#define SVM_EVTINJ_TYPE_SHIFT 8
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 5f65b759abcb..ba11fc3bf843 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -114,7 +114,6 @@ void recalc_intercepts(struct vcpu_svm *svm)
for (i = 0; i < MAX_VECTORS; i++)
c->intercepts[i] = h->intercepts[i];

- c->intercept_dr = h->intercept_dr;
c->intercept_exceptions = h->intercept_exceptions;
c->intercept = h->intercept;

@@ -137,7 +136,6 @@ void recalc_intercepts(struct vcpu_svm *svm)
for (i = 0; i < MAX_VECTORS; i++)
c->intercepts[i] |= g->intercepts[i];

- c->intercept_dr |= g->intercept_dr;
c->intercept_exceptions |= g->intercept_exceptions;
c->intercept |= g->intercept;
}
@@ -150,7 +148,6 @@ static void copy_vmcb_control_area(struct vmcb_control_area *dst,
for (i = 0; i < MAX_VECTORS; i++)
dst->intercepts[i] = from->intercepts[i];

- dst->intercept_dr = from->intercept_dr;
dst->intercept_exceptions = from->intercept_exceptions;
dst->intercept = from->intercept;
dst->iopm_base_pa = from->iopm_base_pa;
@@ -779,8 +776,7 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
break;
}
case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
- u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
- if (svm->nested.ctl.intercept_dr & bit)
+ if (vmcb_is_intercept(&svm->nested.ctl, exit_code))
vmexit = NESTED_EXIT_DONE;
break;
}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 523936b80dda..1a5f3908b388 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2815,8 +2815,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
pr_err("VMCB Control Area:\n");
pr_err("%-20s%04x\n", "cr_read:", control->intercepts[CR_VECTOR] & 0xffff);
pr_err("%-20s%04x\n", "cr_write:", control->intercepts[CR_VECTOR] >> 16);
- pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
- pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
+ pr_err("%-20s%04x\n", "dr_read:", control->intercepts[DR_VECTOR] & 0xffff);
+ pr_err("%-20s%04x\n", "dr_write:", control->intercepts[DR_VECTOR] >> 16);
pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index e775c502a074..d3b34e0276c5 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -258,22 +258,22 @@ static inline void set_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = get_host_vmcb(svm);

- vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
- | (1 << INTERCEPT_DR1_READ)
- | (1 << INTERCEPT_DR2_READ)
- | (1 << INTERCEPT_DR3_READ)
- | (1 << INTERCEPT_DR4_READ)
- | (1 << INTERCEPT_DR5_READ)
- | (1 << INTERCEPT_DR6_READ)
- | (1 << INTERCEPT_DR7_READ)
- | (1 << INTERCEPT_DR0_WRITE)
- | (1 << INTERCEPT_DR1_WRITE)
- | (1 << INTERCEPT_DR2_WRITE)
- | (1 << INTERCEPT_DR3_WRITE)
- | (1 << INTERCEPT_DR4_WRITE)
- | (1 << INTERCEPT_DR5_WRITE)
- | (1 << INTERCEPT_DR6_WRITE)
- | (1 << INTERCEPT_DR7_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_WRITE);
+ vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);

recalc_intercepts(svm);
}
@@ -282,7 +282,7 @@ static inline void clr_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = get_host_vmcb(svm);

- vmcb->control.intercept_dr = 0;
+ vmcb->control.intercepts[DR_VECTOR] = 0;

recalc_intercepts(svm);
}