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KVM: s390/sclp: correctly set eca siif bit

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Check if siif is available before setting.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Heiko Carstens 2013-12-30 12:54:14 +01:00 committed by Christian Borntraeger
parent 2293897805
commit 217a440683
3 changed files with 30 additions and 3 deletions
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7
arch/s390/include/asm/sclp.h
View file

@ -28,7 +28,11 @@ struct sclp_ipl_info {
struct sclp_cpu_entry {
u8 address;
u8 reserved0[13];
u8 reserved0[2];
u8 : 3;
u8 siif : 1;
u8 : 4;
u8 reserved2[10];
u8 type;
u8 reserved1;
} __attribute__((packed));
@ -61,5 +65,6 @@ int sclp_pci_deconfigure(u32 fid);
int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode);
unsigned long sclp_get_hsa_size(void);
void sclp_early_detect(void);
int sclp_has_siif(void);
#endif /* _ASM_S390_SCLP_H */

4
arch/s390/kvm/kvm-s390.c
View file

@ -625,7 +625,9 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->ecb |= 0x10;
vcpu->arch.sie_block->ecb2 = 8;
vcpu->arch.sie_block->eca = 0xC1002001U;
vcpu->arch.sie_block->eca = 0xC1002000U;
if (sclp_has_siif())
vcpu->arch.sie_block->eca |= 1;
vcpu->arch.sie_block->fac = (int) (long) vfacilities;
vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
if (kvm_s390_cmma_enabled(vcpu->kvm)) {

22
drivers/s390/char/sclp_early.c
View file

@ -22,7 +22,8 @@ struct read_info_sccb {
u8 rnsize; /* 10 */
u8 _reserved0[16 - 11]; /* 11-15 */
u16 ncpurl; /* 16-17 */
u8 _reserved7[24 - 18]; /* 18-23 */
u16 cpuoff; /* 18-19 */
u8 _reserved7[24 - 20]; /* 20-23 */
u8 loadparm[8]; /* 24-31 */
u8 _reserved1[48 - 32]; /* 32-47 */
u64 facilities; /* 48-55 */
@ -45,6 +46,7 @@ static unsigned int sclp_con_has_linemode __initdata;
static unsigned long sclp_hsa_size;
static unsigned int sclp_max_cpu;
static struct sclp_ipl_info sclp_ipl_info;
static unsigned char sclp_siif;
u64 sclp_facilities;
u8 sclp_fac84;
@ -96,6 +98,9 @@ static int __init sclp_read_info_early(struct read_info_sccb *sccb)
static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
{
struct sclp_cpu_entry *cpue;
u16 boot_cpu_address, cpu;
if (sclp_read_info_early(sccb))
return;
@ -116,6 +121,15 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
sclp_max_cpu = sccb->hcpua + 1;
}
boot_cpu_address = stap();
cpue = (void *)sccb + sccb->cpuoff;
for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
if (boot_cpu_address != cpue->address)
continue;
sclp_siif = cpue->siif;
break;
}
/* Save IPL information */
sclp_ipl_info.is_valid = 1;
if (sccb->flags & 0x2)
@ -148,6 +162,12 @@ unsigned int sclp_get_max_cpu(void)
return sclp_max_cpu;
}
int sclp_has_siif(void)
{
return sclp_siif;
}
EXPORT_SYMBOL(sclp_has_siif);
/*
* This function will be called after sclp_facilities_detect(), which gets
* called from early.c code. The sclp_facilities_detect() function retrieves