Re: [Qemu-devel] [PATCH 10/10] S390: Enabling device and program selection

[Alexander Graf]

On 26.04.2013, at 14:12, Dominik Dingel wrote:

> Pass the eboot device info and the loadparm in register 7 and 8.
> Use this values in the BIOS to directly boot the respective
> operating system.
> 
> Signed-off-by: Dominik Dingel <address@hidden>
> 
> diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
> index 36daa67..960ba71 100644
> --- a/hw/s390x/ipl.c
> +++ b/hw/s390x/ipl.c
> @@ -77,6 +77,10 @@ static void s390_ipl_from_disk(VirtIOBlkCcw *dev, uint64_t 
> pswaddr)
>     env->psw.addr = pswaddr;
>     env->psw.mask = IPL_PSW_MASK;
>     env->regs[7] = ccw_dev->sch->devno;
> +    env->regs[7] = (env->regs[7] << 16) | (ccw_dev->sch->schid);
> +    env->regs[7] = (env->regs[7] << 8) | (ccw_dev->sch->cssid);
> +    env->regs[7] = (env->regs[7] << 8) | (ccw_dev->sch->ssid);
> +    env->regs[8] = ccw_dev->loadparm;

No, we want a list.

>     s390_add_running_cpu(cpu);
> }
> 
> diff --git a/pc-bios/s390-ccw.img b/pc-bios/s390-ccw.img

Please do blob patches at the end of the series in a separate patch.

Alex

> index 
> b549a86e55194bbf54e25f839e52b490ac308260..fe8d2c6b9f5d937ea156084f7eb248b17e1fa89c
>  100644
> GIT binary patch
> literal 17528
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> 
> literal 9432
> zcmeHNZ){W76+h25c_s<r5hCiA2yP;address@hidden&Zm~|TsaUfPhLLGxp
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> address@hidden>1%nj27mVd
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> zsoIFKPqAIed&j;g2CUzN>OW?vD_$>xqY9pjR0;d{Sfx+ZOAL%9sQfI%MO~+O-l`N)
> address@hidden@u+WC_4t1<{^hT((ecXvOz?F?zM>address@hidden(e|4JYC>7*wZsZj5E!dC|M
> z{bklVRDb;yeeZuKMBe{UFrH(<no>address@hidden))PTyCh)fd3rkv9FyU??zSqxG&(*
> zj<c0M-tDd_{(MaDM)muj)qk&|Re5x)+VJI>a;<p`s>address@hidden
> 
> diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
> index 53a460d..9cd3edf 100644
> --- a/pc-bios/s390-ccw/bootmap.c
> +++ b/pc-bios/s390-ccw/bootmap.c
> @@ -173,7 +173,7 @@ fail:
>     return -1;
> }
> 
> -int zipl_load(void)
> +int zipl_load(uint64_t load_parm)
> {
>     struct mbr *mbr = (void*)sec;
>     uint8_t *ns, *ns_end;
> @@ -223,7 +223,7 @@ int zipl_load(void)
> 
>     /* Run the default entry */
> 
> -    prog_table_entry = (struct scsi_blockptr *)(sec + pte_len);
> +    prog_table_entry = (struct scsi_blockptr *)(sec + (pte_len 
> *(1+load_parm)));
> 
>     return zipl_run(prog_table_entry);
> 
> diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
> index fd40fa5..0c1c11c 100644
> --- a/pc-bios/s390-ccw/main.c
> +++ b/pc-bios/s390-ccw/main.c
> @@ -20,7 +20,7 @@ void virtio_panic(const char *string)
>     while (1) { }
> }
> 
> -static void virtio_setup(void)
> +static void virtio_setup(uint16_t dev_no)
> {
>     struct schib schib;
>     int i;
> @@ -35,7 +35,7 @@ static void virtio_setup(void)
>         if (r == 3) {
>             break;
>         }
> -        if (schib.pmcw.dnv) {
> +        if (schib.pmcw.dnv && (schib.pmcw.dev == dev_no)) {
>             if (virtio_is_blk(blk_schid)) {
>                 found = true;
>                 break;
> @@ -52,10 +52,24 @@ static void virtio_setup(void)
> 
> int main(void)
> {
> +    uint64_t boot_value;
> +    uint64_t load_parm;
> +    register uint64_t reg7 asm("7");
> +    register uint64_t reg8 asm("8");
> +    
> +    asm volatile(
> +            "   stg     %2, %0\n"
> +            "   stg     %3, %1\n"
> +            : "=m" (boot_value), "=m" (load_parm)
> +            : "d" (reg7), "d" (reg8)
> +            : "cc");
> +    
>     sclp_setup();
> -    virtio_setup();
> -    if (zipl_load() < 0)
> +    virtio_setup(boot_value >> 32);
> +
> +    if (zipl_load(load_parm) < 0) {
>         sclp_print("Failed to load OS from hard disk\n");
> +    }
>     disabled_wait();
>     while (1) { }
> }
> diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
> index 8241b0a..2851995 100644
> --- a/pc-bios/s390-ccw/s390-ccw.h
> +++ b/pc-bios/s390-ccw/s390-ccw.h
> @@ -63,7 +63,7 @@ void virtio_setup_block(struct subchannel_id schid);
> int virtio_read(ulong sector, void *load_addr);
> 
> /* bootmap.c */
> -int zipl_load(void);
> +int zipl_load(uint64_t load_parm);
> 
> static inline void *memset(void *s, int c, size_t n)
> {
> -- 
> 1.7.9.5
>