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From 38ba55dd27a3b8308f0ce2e82a4c3eba3f197d20 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 29 May 2020 05:53:53 -0400
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Subject: [PATCH 11/42] pc-bios/s390x: Fix reset psw mask
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200529055420.16855-12-thuth@redhat.com>
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Patchwork-id: 97034
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 11/38] pc-bios/s390x: Fix reset psw mask
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Bugzilla: 1828317
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RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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From: Janosch Frank <frankja@linux.ibm.com>
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We need to set the short psw indication bit in the reset psw, as it is
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a short psw.
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Exposed by "s390x: Properly fetch and test the short psw on diag308
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subc 0/1".
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Fixes: 962982329029 ("pc-bios/s390-ccw: do a subsystem reset before running the guest")
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Message-Id: <20191203132813.2734-5-frankja@linux.ibm.com>
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Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 5c6f0d5f46a77d77460dfb518cf1e1e4145c276e)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/jump2ipl.c | 12 +++++++-----
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1 file changed, 7 insertions(+), 5 deletions(-)
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diff --git a/pc-bios/s390-ccw/jump2ipl.c b/pc-bios/s390-ccw/jump2ipl.c
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index 266f1502b9..da13c43cc0 100644
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--- a/pc-bios/s390-ccw/jump2ipl.c
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+++ b/pc-bios/s390-ccw/jump2ipl.c
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@@ -12,11 +12,11 @@
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#define KERN_IMAGE_START 0x010000UL
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#define PSW_MASK_64 0x0000000100000000ULL
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#define PSW_MASK_32 0x0000000080000000ULL
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-#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
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+#define PSW_MASK_SHORTPSW 0x0008000000000000ULL
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+#define RESET_PSW_MASK (PSW_MASK_SHORTPSW | PSW_MASK_32 | PSW_MASK_64)
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typedef struct ResetInfo {
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- uint32_t ipl_mask;
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- uint32_t ipl_addr;
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+ uint64_t ipl_psw;
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uint32_t ipl_continue;
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} ResetInfo;
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@@ -50,7 +50,9 @@ void jump_to_IPL_code(uint64_t address)
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ResetInfo *current = 0;
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save = *current;
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- current->ipl_addr = (uint32_t) (uint64_t) &jump_to_IPL_2;
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+
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+ current->ipl_psw = (uint64_t) &jump_to_IPL_2;
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+ current->ipl_psw |= RESET_PSW_MASK;
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current->ipl_continue = address & 0x7fffffff;
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debug_print_int("set IPL addr to", current->ipl_continue);
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@@ -82,7 +84,7 @@ void jump_to_low_kernel(void)
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}
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/* Trying to get PSW at zero address */
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- if (*((uint64_t *)0) & IPL_PSW_MASK) {
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+ if (*((uint64_t *)0) & RESET_PSW_MASK) {
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jump_to_IPL_code((*((uint64_t *)0)) & 0x7fffffff);
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}
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--
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2.27.0
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