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KVM: s390: guestdbg: separate defines for per code

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Let's avoid working with the PER_EVENT* defines, used for control register
manipulation, when checking the u8 PER code. Introduce separate defines
based on the existing defines.

Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2016-05-27 15:24:33 +02:00 committed by Christian Borntraeger
parent 8953fb08ab
commit b1ffffbd0f
1 changed files with 17 additions and 11 deletions
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28
arch/s390/kvm/guestdbg.c
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@ -382,14 +382,20 @@ void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu)
vcpu->guest_debug &= ~KVM_GUESTDBG_EXIT_PENDING;
}
#define PER_CODE_MASK (PER_EVENT_MASK >> 24)
#define PER_CODE_BRANCH (PER_EVENT_BRANCH >> 24)
#define PER_CODE_IFETCH (PER_EVENT_IFETCH >> 24)
#define PER_CODE_STORE (PER_EVENT_STORE >> 24)
#define PER_CODE_STORE_REAL (PER_EVENT_STORE_REAL >> 24)
#define per_bp_event(code) \
(code & (PER_EVENT_IFETCH | PER_EVENT_BRANCH))
(code & (PER_CODE_IFETCH | PER_CODE_BRANCH))
#define per_write_wp_event(code) \
(code & (PER_EVENT_STORE | PER_EVENT_STORE_REAL))
(code & (PER_CODE_STORE | PER_CODE_STORE_REAL))
static int debug_exit_required(struct kvm_vcpu *vcpu)
{
u32 perc = (vcpu->arch.sie_block->perc << 24);
u8 perc = vcpu->arch.sie_block->perc;
struct kvm_debug_exit_arch *debug_exit = &vcpu->run->debug.arch;
struct kvm_hw_wp_info_arch *wp_info = NULL;
struct kvm_hw_bp_info_arch *bp_info = NULL;
@ -444,7 +450,7 @@ int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu)
const u8 ilen = kvm_s390_get_ilen(vcpu);
struct kvm_s390_pgm_info pgm_info = {
.code = PGM_PER,
.per_code = PER_EVENT_IFETCH >> 24,
.per_code = PER_CODE_IFETCH,
.per_address = __rewind_psw(vcpu->arch.sie_block->gpsw, ilen),
};
@ -458,33 +464,33 @@ int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu)
static void filter_guest_per_event(struct kvm_vcpu *vcpu)
{
u32 perc = vcpu->arch.sie_block->perc << 24;
const u8 perc = vcpu->arch.sie_block->perc;
u64 peraddr = vcpu->arch.sie_block->peraddr;
u64 addr = vcpu->arch.sie_block->gpsw.addr;
u64 cr9 = vcpu->arch.sie_block->gcr[9];
u64 cr10 = vcpu->arch.sie_block->gcr[10];
u64 cr11 = vcpu->arch.sie_block->gcr[11];
/* filter all events, demanded by the guest */
u32 guest_perc = perc & cr9 & PER_EVENT_MASK;
u8 guest_perc = perc & (cr9 >> 24) & PER_CODE_MASK;
if (!guest_per_enabled(vcpu))
guest_perc = 0;
/* filter "successful-branching" events */
if (guest_perc & PER_EVENT_BRANCH &&
if (guest_perc & PER_CODE_BRANCH &&
cr9 & PER_CONTROL_BRANCH_ADDRESS &&
!in_addr_range(addr, cr10, cr11))
guest_perc &= ~PER_EVENT_BRANCH;
guest_perc &= ~PER_CODE_BRANCH;
/* filter "instruction-fetching" events */
if (guest_perc & PER_EVENT_IFETCH &&
if (guest_perc & PER_CODE_IFETCH &&
!in_addr_range(peraddr, cr10, cr11))
guest_perc &= ~PER_EVENT_IFETCH;
guest_perc &= ~PER_CODE_IFETCH;
/* All other PER events will be given to the guest */
/* TODO: Check altered address/address space */
vcpu->arch.sie_block->perc = guest_perc >> 24;
vcpu->arch.sie_block->perc = guest_perc;
if (!guest_perc)
vcpu->arch.sie_block->iprcc &= ~PGM_PER;