From: Janosch Frank <frankja@linux.ibm.com>
To: pbonzini@redhat.com
Cc: kvm@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com,
borntraeger@de.ibm.com, linux-s390@vger.kernel.org,
imbrenda@linux.ibm.com, thuth@redhat.com
Subject: [kvm-unit-tests GIT PULL 01/17] s390x: uv-host: Explain why we set up the home space and remove the space change
Date: Mon, 18 Oct 2021 14:26:19 +0200 [thread overview]
Message-ID: <20211018122635.53614-2-frankja@linux.ibm.com> (raw)
In-Reply-To: <20211018122635.53614-1-frankja@linux.ibm.com>
UV home addresses don't require us to be in home space but we need to
have it set up so hw/fw can use the home asce to translate home
virtual addresses.
Hence we add a comment why we're setting up the home asce and remove
the address space since it's unneeded.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
---
s390x/uv-host.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/s390x/uv-host.c b/s390x/uv-host.c
index 426a67f6..28035707 100644
--- a/s390x/uv-host.c
+++ b/s390x/uv-host.c
@@ -444,13 +444,18 @@ static void test_clear(void)
static void setup_vmem(void)
{
- uint64_t asce, mask;
+ uint64_t asce;
setup_mmu(get_max_ram_size(), NULL);
+ /*
+ * setup_mmu() will enable DAT and set the primary address
+ * space but we need to have a valid home space since UV calls
+ * take home space virtual addresses.
+ *
+ * Hence we just copy the primary asce into the home space.
+ */
asce = stctg(1);
lctlg(13, asce);
- mask = extract_psw_mask() | 0x0000C00000000000UL;
- load_psw_mask(mask);
}
int main(void)
--
2.31.1
next prev parent reply other threads:[~2021-10-18 12:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-18 12:26 [kvm-unit-tests GIT PULL 00/17] s390x update 2021-10-18 Janosch Frank
2021-10-18 12:26 ` Janosch Frank [this message]
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 02/17] lib: s390x: Control register constant cleanup Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 03/17] lib: s390x: Print addressing related exception information Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 04/17] s390x: skey: Test for ADDRESSING exceptions Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 05/17] s390x: mvpg-sie: Remove unused variable Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 06/17] s390x: uv: Tolerate 0x100 query return code Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 07/17] s390x: uv-host: Fence a destroy cpu test on z15 Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 08/17] lib: s390x: uv: Fix share return value and print Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 09/17] lib: s390x: uv: Add UVC_ERR_DEBUG switch Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 10/17] lib: s390x: Add access key argument to tprot Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 11/17] lib: s390x: Print PGM code as hex Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 12/17] s390x: Add sthyi cc==0 r2+1 verification Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 13/17] s390x: snippets: Set stackptr and stacktop in cstart.S Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 14/17] s390x: snippets: Define all things that are needed to link the libc Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 15/17] lib: s390x: Fix PSW constant Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 16/17] lib: s390x: snippet.h: Add a few constants that will make our life easier Janosch Frank
2021-10-18 12:26 ` [kvm-unit-tests GIT PULL 17/17] lib: s390x: Fix copyright message Janosch Frank
2021-10-18 15:31 ` [kvm-unit-tests GIT PULL 00/17] s390x update 2021-10-18 Paolo Bonzini
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