From: Nicholas Piggin <npiggin@gmail.com>
To: kvm@vger.kernel.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
linuxppc-dev@lists.ozlabs.org,
Laurent Vivier <lvivier@redhat.com>,
Thomas Huth <thuth@redhat.com>
Subject: [kvm-unit-tests v2 08/10] powerpc: Discover runtime load address dynamically
Date: Mon, 20 Mar 2023 17:03:37 +1000 [thread overview]
Message-ID: <20230320070339.915172-9-npiggin@gmail.com> (raw)
In-Reply-To: <20230320070339.915172-1-npiggin@gmail.com>
The next change will load the kernels at different addresses depending
on test options, so this needs to be reverted back to dynamic
discovery.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
powerpc/cstart64.S | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/powerpc/cstart64.S b/powerpc/cstart64.S
index 34e3934..069d991 100644
--- a/powerpc/cstart64.S
+++ b/powerpc/cstart64.S
@@ -33,9 +33,14 @@ start:
* We were loaded at QEMU's kernel load address, but we're not
* allowed to link there due to how QEMU deals with linker VMAs,
* so we just linked at zero. This means the first thing to do is
- * to find our stack and toc, and then do a relocate.
+ * to find our stack and toc, and then do a relocate. powernv and
+ * pseries load addreses are not the same, so find the address
+ * dynamically:
*/
- LOAD_REG_IMMEDIATE(r31, SPAPR_KERNEL_LOAD_ADDR)
+ bl 0f
+0: mflr r31
+ subi r31, r31, 0b - start /* QEMU's kernel load address */
+
ld r1, (p_stack - start)(r31)
ld r2, (p_toc - start)(r31)
add r1, r1, r31
@@ -114,8 +119,11 @@ p_toc: .llong tocptr
p_dyn: .llong dynamic_start
.text
+start_text:
.align 3
+p_toc_text: .llong tocptr
+.align 3
.globl hcall
hcall:
sc 1
@@ -193,9 +201,10 @@ call_handler:
std r0, _MSR(r1)
/* restore TOC pointer */
-
- LOAD_REG_IMMEDIATE(r31, SPAPR_KERNEL_LOAD_ADDR)
- ld r2, (p_toc - start)(r31)
+ bl 0f
+0: mflr r31
+ subi r31, r31, 0b - start_text
+ ld r2, (p_toc_text - start_text)(r31)
/* FIXME: build stack frame */
--
2.37.2
next prev parent reply other threads:[~2023-03-20 7:04 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-20 7:03 [kvm-unit-tests v2 00/10] powerpc: updates, P10, PNV support Nicholas Piggin
2023-03-20 7:03 ` [kvm-unit-tests v2 01/10] MAINTAINERS: Update powerpc list Nicholas Piggin
2023-03-23 11:23 ` Thomas Huth
2023-03-20 7:03 ` [kvm-unit-tests v2 02/10] powerpc: add local variant of SPR test Nicholas Piggin
2023-03-23 11:26 ` Thomas Huth
2023-03-27 5:37 ` Nicholas Piggin
2023-03-20 7:03 ` [kvm-unit-tests v2 03/10] powerpc: abstract H_CEDE calls into a sleep functions Nicholas Piggin
2023-03-23 12:12 ` Thomas Huth
2023-03-27 5:39 ` Nicholas Piggin
2023-03-20 7:03 ` [kvm-unit-tests v2 04/10] powerpc: Add ISA v3.1 (POWER10) support to SPR test Nicholas Piggin
2023-03-23 12:01 ` Thomas Huth
2023-03-20 7:03 ` [kvm-unit-tests v2 05/10] powerpc: Indirect SPR accessor functions Nicholas Piggin
2023-03-20 7:03 ` [kvm-unit-tests v2 06/10] powerpc/sprs: Specify SPRs with data rather than code Nicholas Piggin
2023-03-23 12:36 ` Thomas Huth
2023-03-27 11:59 ` Nicholas Piggin
2023-03-20 7:03 ` [kvm-unit-tests v2 07/10] powerpc/spapr_vpa: Add basic VPA tests Nicholas Piggin
2023-03-23 14:07 ` Thomas Huth
2023-03-27 6:27 ` Nicholas Piggin
2023-03-20 7:03 ` Nicholas Piggin [this message]
2023-03-20 7:03 ` [kvm-unit-tests v2 09/10] powerpc: Support powernv machine with QEMU TCG Nicholas Piggin
2023-03-20 9:47 ` Cédric Le Goater
2023-03-21 0:38 ` Nicholas Piggin
2023-03-23 14:14 ` Thomas Huth
2023-03-20 7:03 ` [kvm-unit-tests v2 10/10] powerpc/sprs: Test hypervisor registers on powernv machine Nicholas Piggin
2023-03-23 14:16 ` Thomas Huth
2023-03-21 6:14 ` [kvm-unit-tests v2 00/10] powerpc: updates, P10, PNV support Nicholas Piggin
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