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Diffstat (limited to 'arch/s390/kvm/priv.c')
-rw-r--r--arch/s390/kvm/priv.c274
1 files changed, 229 insertions, 45 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 6bbd7b5a0bbe..0da3e6eb6be6 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -1,7 +1,7 @@
/*
* handling privileged instructions
*
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008, 2013
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -20,6 +20,9 @@
#include <asm/debug.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/compat.h>
#include "gaccess.h"
@@ -34,6 +37,9 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_spx++;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
operand2 = kvm_s390_get_base_disp_s(vcpu);
/* must be word boundary */
@@ -65,6 +71,9 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stpx++;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
operand2 = kvm_s390_get_base_disp_s(vcpu);
/* must be word boundary */
@@ -89,6 +98,9 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stap++;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
useraddr = kvm_s390_get_base_disp_s(vcpu);
if (useraddr & 1)
@@ -105,7 +117,12 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
static int handle_skey(struct kvm_vcpu *vcpu)
{
vcpu->stat.instruction_storage_key++;
- vcpu->arch.sie_block->gpsw.addr -= 4;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ vcpu->arch.sie_block->gpsw.addr =
+ __rewind_psw(vcpu->arch.sie_block->gpsw, 4);
VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
return 0;
}
@@ -129,9 +146,10 @@ static int handle_tpi(struct kvm_vcpu *vcpu)
* Store the two-word I/O interruption code into the
* provided area.
*/
- put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) addr);
- put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) (addr + 2));
- put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) (addr + 4));
+ if (put_guest(vcpu, inti->io.subchannel_id, (u16 __user *)addr)
+ || put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *)(addr + 2))
+ || put_guest(vcpu, inti->io.io_int_parm, (u32 __user *)(addr + 4)))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
} else {
/*
* Store the three-word I/O interruption code into
@@ -182,6 +200,9 @@ static int handle_io_inst(struct kvm_vcpu *vcpu)
{
VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
if (vcpu->kvm->arch.css_support) {
/*
* Most I/O instructions will be handled by userspace.
@@ -210,8 +231,12 @@ static int handle_stfl(struct kvm_vcpu *vcpu)
int rc;
vcpu->stat.instruction_stfl++;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
/* only pass the facility bits, which we can handle */
- facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3;
+ facility_list = S390_lowcore.stfl_fac_list & 0xff82fff3;
rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
&facility_list, sizeof(facility_list));
@@ -255,8 +280,8 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
u64 addr;
if (gpsw->mask & PSW_MASK_PSTATE)
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -278,6 +303,9 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
psw_t new_psw;
u64 addr;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -296,6 +324,9 @@ static int handle_stidp(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stidp++;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
operand2 = kvm_s390_get_base_disp_s(vcpu);
if (operand2 & 7)
@@ -351,16 +382,30 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_stsi++;
VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
- operand2 = kvm_s390_get_base_disp_s(vcpu);
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ if (fc > 3) {
+ vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; /* cc 3 */
+ return 0;
+ }
- if (operand2 & 0xfff && fc > 0)
+ if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
+ || vcpu->run->s.regs.gprs[1] & 0xffff0000)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- switch (fc) {
- case 0:
+ if (fc == 0) {
vcpu->run->s.regs.gprs[0] = 3 << 28;
- vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
+ vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); /* cc 0 */
return 0;
+ }
+
+ operand2 = kvm_s390_get_base_disp_s(vcpu);
+
+ if (operand2 & 0xfff)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ switch (fc) {
case 1: /* same handling for 1 and 2 */
case 2:
mem = get_zeroed_page(GFP_KERNEL);
@@ -377,8 +422,6 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
goto out_no_data;
handle_stsi_3_2_2(vcpu, (void *) mem);
break;
- default:
- goto out_no_data;
}
if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
@@ -432,20 +475,14 @@ int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
intercept_handler_t handler;
/*
- * a lot of B2 instructions are priviledged. We first check for
- * the privileged ones, that we can handle in the kernel. If the
- * kernel can handle this instruction, we check for the problem
- * state bit and (a) handle the instruction or (b) send a code 2
- * program check.
- * Anything else goes to userspace.*/
+ * A lot of B2 instructions are priviledged. Here we check for
+ * the privileged ones, that we can handle in the kernel.
+ * Anything else goes to userspace.
+ */
handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
- if (handler) {
- if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
- else
- return handler(vcpu);
- }
+ if (handler)
+ return handler(vcpu);
+
return -EOPNOTSUPP;
}
@@ -453,8 +490,7 @@ static int handle_epsw(struct kvm_vcpu *vcpu)
{
int reg1, reg2;
- reg1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 24;
- reg2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
+ kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
/* This basically extracts the mask half of the psw. */
vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
@@ -467,9 +503,88 @@ static int handle_epsw(struct kvm_vcpu *vcpu)
return 0;
}
+#define PFMF_RESERVED 0xfffc0101UL
+#define PFMF_SK 0x00020000UL
+#define PFMF_CF 0x00010000UL
+#define PFMF_UI 0x00008000UL
+#define PFMF_FSC 0x00007000UL
+#define PFMF_NQ 0x00000800UL
+#define PFMF_MR 0x00000400UL
+#define PFMF_MC 0x00000200UL
+#define PFMF_KEY 0x000000feUL
+
+static int handle_pfmf(struct kvm_vcpu *vcpu)
+{
+ int reg1, reg2;
+ unsigned long start, end;
+
+ vcpu->stat.instruction_pfmf++;
+
+ kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
+
+ if (!MACHINE_HAS_PFMF)
+ return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ /* Only provide non-quiescing support if the host supports it */
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
+ S390_lowcore.stfl_fac_list & 0x00020000)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ /* No support for conditional-SSKE */
+ if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
+ switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
+ case 0x00000000:
+ end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
+ break;
+ case 0x00001000:
+ end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
+ break;
+ /* We dont support EDAT2
+ case 0x00002000:
+ end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
+ break;*/
+ default:
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+ }
+ while (start < end) {
+ unsigned long useraddr;
+
+ useraddr = gmap_translate(start, vcpu->arch.gmap);
+ if (IS_ERR((void *)useraddr))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
+ if (clear_user((void __user *)useraddr, PAGE_SIZE))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ }
+
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
+ if (set_guest_storage_key(current->mm, useraddr,
+ vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
+ vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ }
+
+ start += PAGE_SIZE;
+ }
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
+ vcpu->run->s.regs.gprs[reg2] = end;
+ return 0;
+}
+
static const intercept_handler_t b9_handlers[256] = {
[0x8d] = handle_epsw,
[0x9c] = handle_io_inst,
+ [0xaf] = handle_pfmf,
};
int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
@@ -478,29 +593,96 @@ int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
/* This is handled just as for the B2 instructions. */
handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
- if (handler) {
- if ((handler != handle_epsw) &&
- (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE))
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
- else
- return handler(vcpu);
- }
+ if (handler)
+ return handler(vcpu);
+
return -EOPNOTSUPP;
}
+int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ u64 useraddr;
+ u32 val = 0;
+ int reg, rc;
+
+ vcpu->stat.instruction_lctl++;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ useraddr = kvm_s390_get_base_disp_rs(vcpu);
+
+ if (useraddr & 3)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
+ useraddr);
+ trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
+
+ reg = reg1;
+ do {
+ rc = get_guest(vcpu, val, (u32 __user *) useraddr);
+ if (rc)
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
+ vcpu->arch.sie_block->gcr[reg] |= val;
+ useraddr += 4;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+
+ return 0;
+}
+
+static int handle_lctlg(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ u64 useraddr;
+ int reg, rc;
+
+ vcpu->stat.instruction_lctlg++;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ useraddr = kvm_s390_get_base_disp_rsy(vcpu);
+
+ if (useraddr & 7)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ reg = reg1;
+
+ VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
+ useraddr);
+ trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
+
+ do {
+ rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
+ (u64 __user *) useraddr);
+ if (rc)
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ useraddr += 8;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+
+ return 0;
+}
+
static const intercept_handler_t eb_handlers[256] = {
+ [0x2f] = handle_lctlg,
[0x8a] = handle_io_inst,
};
-int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu)
+int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
{
intercept_handler_t handler;
- /* All eb instructions that end up here are privileged. */
- if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
if (handler)
return handler(vcpu);
@@ -515,6 +697,9 @@ static int handle_tprot(struct kvm_vcpu *vcpu)
vcpu->stat.instruction_tprot++;
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
/* we only handle the Linux memory detection case:
@@ -560,8 +745,7 @@ static int handle_sckpf(struct kvm_vcpu *vcpu)
u32 value;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
- return kvm_s390_inject_program_int(vcpu,
- PGM_PRIVILEGED_OPERATION);
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
return kvm_s390_inject_program_int(vcpu,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 11:53:06 +0100