Fix emulation of various instructions, required by libm in F22 ppc64 guests.
This commit is contained in:
Richard W.M. Jones
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ba1746053e
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2273d40a00
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From d233fc09d20fa24f6ee03f8505333d73f559eacf Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Sun, 13 Sep 2015 23:03:44 +0200
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Subject: [PATCH 1/2] target-ppc: fix vcipher, vcipherlast, vncipherlast and
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vpermxor
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For vector instructions, the helpers get pointers to the vector register
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in arguments. Some operands might point to the same register, including
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the operand holding the result.
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When emulating instructions which access the vector elements in a
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non-linear way, we need to store the result in an temporary variable.
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This fixes openssl when emulating a POWER8 CPU.
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Cc: Tom Musta <tommusta@gmail.com>
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Cc: Alexander Graf <agraf@suse.de>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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---
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target-ppc/int_helper.c | 19 ++++++++++++++-----
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1 file changed, 14 insertions(+), 5 deletions(-)
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diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
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index 0a55d5e..b122868 100644
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--- a/target-ppc/int_helper.c
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+++ b/target-ppc/int_helper.c
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@@ -2327,24 +2327,28 @@ void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a)
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void helper_vcipher(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
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{
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+ ppc_avr_t result;
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int i;
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VECTOR_FOR_INORDER_I(i, u32) {
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- r->AVRW(i) = b->AVRW(i) ^
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+ result.AVRW(i) = b->AVRW(i) ^
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(AES_Te0[a->AVRB(AES_shifts[4*i + 0])] ^
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AES_Te1[a->AVRB(AES_shifts[4*i + 1])] ^
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AES_Te2[a->AVRB(AES_shifts[4*i + 2])] ^
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AES_Te3[a->AVRB(AES_shifts[4*i + 3])]);
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}
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+ *r = result;
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}
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void helper_vcipherlast(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
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{
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+ ppc_avr_t result;
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int i;
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VECTOR_FOR_INORDER_I(i, u8) {
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- r->AVRB(i) = b->AVRB(i) ^ (AES_sbox[a->AVRB(AES_shifts[i])]);
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+ result.AVRB(i) = b->AVRB(i) ^ (AES_sbox[a->AVRB(AES_shifts[i])]);
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}
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+ *r = result;
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}
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void helper_vncipher(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
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@@ -2369,11 +2373,13 @@ void helper_vncipher(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
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void helper_vncipherlast(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
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{
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+ ppc_avr_t result;
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int i;
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VECTOR_FOR_INORDER_I(i, u8) {
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- r->AVRB(i) = b->AVRB(i) ^ (AES_isbox[a->AVRB(AES_ishifts[i])]);
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+ result.AVRB(i) = b->AVRB(i) ^ (AES_isbox[a->AVRB(AES_ishifts[i])]);
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}
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+ *r = result;
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}
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#define ROTRu32(v, n) (((v) >> (n)) | ((v) << (32-n)))
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@@ -2460,16 +2466,19 @@ void helper_vshasigmad(ppc_avr_t *r, ppc_avr_t *a, uint32_t st_six)
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void helper_vpermxor(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
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{
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+ ppc_avr_t result;
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int i;
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+
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VECTOR_FOR_INORDER_I(i, u8) {
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int indexA = c->u8[i] >> 4;
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int indexB = c->u8[i] & 0xF;
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#if defined(HOST_WORDS_BIGENDIAN)
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- r->u8[i] = a->u8[indexA] ^ b->u8[indexB];
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+ result.u8[i] = a->u8[indexA] ^ b->u8[indexB];
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#else
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- r->u8[i] = a->u8[15-indexA] ^ b->u8[15-indexB];
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+ result.u8[i] = a->u8[15-indexA] ^ b->u8[15-indexB];
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#endif
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}
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+ *r = result;
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}
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#undef VECTOR_FOR_INORDER_I
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--
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2.5.0
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@ -0,0 +1,53 @@
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From d539a02e18916c558985f26cf37af1e83851d9fd Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Sun, 13 Sep 2015 23:03:45 +0200
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Subject: [PATCH 2/2] target-ppc: fix xscmpodp and xscmpudp decoding
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The xscmpodp and xscmpudp instructions only have the AX, BX bits in
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there encoding, the lowest bit (usually TX) is marked as an invalid
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bit. We therefore can't decode them with GEN_XX2FORM, which decodes
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the two lowest bit.
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Introduce a new form GEN_XX2FORM, which decodes AX and BX and mark
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the lowest bit as invalid.
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Cc: Tom Musta <tommusta@gmail.com>
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Cc: Alexander Graf <agraf@suse.de>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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---
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target-ppc/translate.c | 11 +++++++++--
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1 file changed, 9 insertions(+), 2 deletions(-)
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diff --git a/target-ppc/translate.c b/target-ppc/translate.c
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index 84c5cea..c0eed13 100644
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--- a/target-ppc/translate.c
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+++ b/target-ppc/translate.c
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@@ -10670,6 +10670,13 @@ GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 1, opc3, 0, PPC_NONE, fl2), \
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GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 2, opc3, 0, PPC_NONE, fl2), \
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GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 3, opc3, 0, PPC_NONE, fl2)
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+#undef GEN_XX2IFORM
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+#define GEN_XX2IFORM(name, opc2, opc3, fl2) \
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+GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 0, opc3, 1, PPC_NONE, fl2), \
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+GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 1, opc3, 1, PPC_NONE, fl2), \
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+GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 2, opc3, 1, PPC_NONE, fl2), \
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+GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 3, opc3, 1, PPC_NONE, fl2)
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+
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#undef GEN_XX3_RC_FORM
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#define GEN_XX3_RC_FORM(name, opc2, opc3, fl2) \
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GEN_HANDLER2_E(name, #name, 0x3C, opc2 | 0x00, opc3 | 0x00, 0, PPC_NONE, fl2), \
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@@ -10731,8 +10738,8 @@ GEN_XX3FORM(xsnmaddadp, 0x04, 0x14, PPC2_VSX),
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GEN_XX3FORM(xsnmaddmdp, 0x04, 0x15, PPC2_VSX),
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GEN_XX3FORM(xsnmsubadp, 0x04, 0x16, PPC2_VSX),
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GEN_XX3FORM(xsnmsubmdp, 0x04, 0x17, PPC2_VSX),
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-GEN_XX2FORM(xscmpodp, 0x0C, 0x05, PPC2_VSX),
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-GEN_XX2FORM(xscmpudp, 0x0C, 0x04, PPC2_VSX),
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+GEN_XX2IFORM(xscmpodp, 0x0C, 0x05, PPC2_VSX),
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+GEN_XX2IFORM(xscmpudp, 0x0C, 0x04, PPC2_VSX),
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GEN_XX3FORM(xsmaxdp, 0x00, 0x14, PPC2_VSX),
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GEN_XX3FORM(xsmindp, 0x00, 0x15, PPC2_VSX),
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GEN_XX2FORM(xscvdpsp, 0x12, 0x10, PPC2_VSX),
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--
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2.5.0
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@ -43,7 +43,7 @@
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Summary: QEMU is a FAST! processor emulator
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Name: qemu
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Version: 2.3.1
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Release: 3%{?dist}
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Release: 4%{?dist}
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Epoch: 2
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License: GPLv2+ and LGPLv2+ and BSD
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Group: Development/Tools
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@ -90,6 +90,10 @@ Patch0006: 0006-vnc-fix-memory-corruption-CVE-2015-5225.patch
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# Fix typo causing qemu-img to link against entire world (rhbz #1260996)
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Patch0007: 0007-fix-quorum-libs.patch
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# Fix emulation of various instructions, required by libm in F22 ppc64 guests.
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Patch0008: 0001-target-ppc-fix-vcipher-vcipherlast-vncipherlast-and-.patch
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Patch0009: 0002-target-ppc-fix-xscmpodp-and-xscmpudp-decoding.patch
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BuildRequires: SDL2-devel
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BuildRequires: zlib-devel
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BuildRequires: which
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@ -1191,6 +1195,9 @@ getent passwd qemu >/dev/null || \
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%changelog
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* Sun Sep 20 2015 Richard W.M. Jones <rjones@redhat.com> - 2:2.3.1-4
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- Fix emulation of various instructions, required by libm in F22 ppc64 guests.
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* Tue Sep 8 2015 Daniel P. Berrange <berrange@redhat.com> - 2:2.3.1-3
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- Fix typo causing qemu-img to link against entire world (bz #1260996)
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